CONOCO INC /DE
S-1/A, 1998-09-28
PETROLEUM REFINING
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<PAGE>   1
 
   
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON SEPTEMBER 28, 1998
    
 
                                                      REGISTRATION NO. 333-60119
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
 
   
                                AMENDMENT NO. 3
    
                                       TO
                                    FORM S-1
            REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933
                             ---------------------
                                  CONOCO INC.
             (Exact Name of Registrant as Specified in Its Charter)
<TABLE>
<S>                                          <C>
                  DELAWARE                                       2911
      (State or Other Jurisdiction of                (Primary Standard Industrial
       Incorporation or Organization)                Classification Code Number)
 
<CAPTION>
<S>                                           <C>
                  DELAWARE                                     51-0370352
      (State or Other Jurisdiction of                       (I.R.S. Employer
       Incorporation or Organization)                    Identification Number)
</TABLE>
 
                            600 NORTH DAIRY ASHFORD
                              HOUSTON, TEXAS 77079
                                 (281) 293-1000
    (Address, Including Zip Code, and Telephone Number, Including Area Code,
                  of Registrant's Principal Executive Offices)
 
                                R. A. HARRINGTON
                       SENIOR VICE PRESIDENT, LEGAL, AND
                                GENERAL COUNSEL
                                  CONOCO INC.
                            600 NORTH DAIRY ASHFORD
                              HOUSTON, TEXAS 77079
                              TEL: (281) 293-1000
                              FAX: (281) 293-1440
 (Name, Address, Including Zip Code, and Telephone Number, Including Area Code,
                             of Agent for Service)
                                   Copies to:
 
<TABLE>
<S>                                          <C>
          MATTHEW J. MALLOW, ESQ.                       WALTER J. SMITH, ESQ.
         EILEEN NUGENT SIMON, ESQ.                      BAKER & BOTTS, L.L.P.
           SKADDEN, ARPS, SLATE,                           ONE SHELL PLAZA
             MEAGHER & FLOM LLP                             910 LOUISIANA
              919 THIRD AVENUE                           HOUSTON, TEXAS 77002
          NEW YORK, NEW YORK 10022                       TEL: (713) 229-1234
            TEL: (212) 735-3000                          FAX: (713) 229-1522
            FAX: (212) 735-2000
 
<CAPTION>
<S>                                           <C>
          MATTHEW J. MALLOW, ESQ.                         JOHN W. WHITE, ESQ.
         EILEEN NUGENT SIMON, ESQ.                      CRAVATH, SWAINE & MOORE
           SKADDEN, ARPS, SLATE,                           825 EIGHTH AVENUE
             MEAGHER & FLOM LLP                         NEW YORK, NEW YORK 10019
              919 THIRD AVENUE                            TEL: (212) 474-1000
          NEW YORK, NEW YORK 10022                        FAX: (212) 474-3700
            TEL: (212) 735-3000
            FAX: (212) 735-2000
</TABLE>
 
    APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon as
practicable after the effective date of this Registration Statement.
 
    If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, as amended (the "Securities Act"), check the following box:  [ ]
 
    If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, check the following box and
list the Securities Act registration statement number of the earlier effective
registration statement for the same offering:  [ ]
 
    If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering:  [ ]
 
    If this Form is a post-effective amendment filed pursuant to Rule 462(d)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering:  [ ]
 
    If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box:  [ ]
                             ---------------------
                        CALCULATION OF REGISTRATION FEE
 
   
<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------
                                                                     PROPOSED MAXIMUM                     AMOUNT OF
                    TITLE OF SECURITIES                             AGGREGATE OFFERING                  REGISTRATION
                      BEING REGISTERED                                   PRICE(1)                            FEE
- ------------------------------------------------------------------------------------------------------------------------------
<S>                                                           <C>                              <C>
Class A Common Stock, $.01 par value per share..............          $4,140,000,000                     $1,221,300
- ------------------------------------------------------------------------------------------------------------------------------
Preferred Share Purchase Rights ("Rights")(2)...............                --                               --
- ------------------------------------------------------------------------------------------------------------------------------
Options to purchase Class A Common Stock and stock
  appreciation rights with respect to Class A Common
  Stock(3)..................................................           $214,425,000                        $63,256
- ------------------------------------------------------------------------------------------------------------------------------
Class A Common Stock, $.01 par value per share(4)...........                --                               --
- ------------------------------------------------------------------------------------------------------------------------------
Total.......................................................          $4,354,425,000                    $1,284,556(5)
- ------------------------------------------------------------------------------------------------------------------------------
- ------------------------------------------------------------------------------------------------------------------------------
</TABLE>
    
 
(1) Estimated solely for the purpose of computing the registration fee in
    accordance with Rule 457(o) of the Securities Act.
(2) Rights initially will trade together with the Class A Common Stock. The
    value attributable to the Rights, if any, will be reflected in the market
    price of the Class A Common Stock.
   
(3) Consists of options to purchase Class A Common Stock and stock appreciation
    rights with respect to Class A Common Stock (collectively, the "Conoco
    Options") to be granted by Conoco Inc. under its 1998 Stock and Performance
    Incentive Plan and its 1998 Key Employee Stock Performance Plan upon
    surrender by the holders thereof of options to purchase common stock, $0.30
    par value per share, of E. I. du Pont de Nemours and Company and of stock
    appreciation rights with respect to DuPont common stock (collectively, the
    "DuPont Options"). The aggregate offering price of the Conoco Options has
    been determined based on the aggregate in-the-money value of the DuPont
    Options eligible to be surrendered calculated using the average of the high
    and low prices of DuPont common stock on August 18, 1998.
    
   
(4) Consists of such indeterminate number of shares of Class A Common Stock
    underlying the Conoco Options being registered hereby.
    
   
(5) A filing fee of $92,756 has previously been paid. The Registrant is
    registering an additional $4,040,000,000 aggregate offering price of
    securities, and an additional fee of $1,191,800 is being paid herewith.
    
 
    THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF
THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(a),
MAY DETERMINE.
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>   2
 
                                EXPLANATORY NOTE
 
     This registration statement contains two forms of prospectus: one to be
used in connection with an offering in the United States and Canada (the "U.S.
Prospectus") and one to be used in connection with a concurrent international
offering outside the United States and Canada (the "International Prospectus").
The International Prospectus is substantially the same as the U.S. Prospectus
except for the front outside cover page. The form of the U.S. Prospectus is
included herein and is followed by the page to be used in the International
Prospectus which differs from that in the U.S. Prospectus. The page for the
International Prospectus included herein is labeled "Alternate Page for
International Prospectus." Each of the U.S. Prospectus and the International
Prospectus will be filed with the Securities and Exchange Commission pursuant to
Rule 424(b) under the Securities Act of 1933.
<PAGE>   3
INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT. A
REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE
SECURITIES AND EXCHANGE COMMISSION. THESE SECURITIES MAY NOT BE SOLD NOR MAY
OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION STATEMENT BECOMES
EFFECTIVE. THIS PROSPECTUS SHALL NOT CONSTITUTE AN OFFER TO SELL OR THE
SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE SECURITIES
IN ANY STATE IN WHICH SUCH OFFER, SOLICITATION OR SALE WOULD BE UNLAWFUL PRIOR
TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH STATE.
 
   
PROSPECTUS (Subject to Completion)
Issued September 28, 1998
    
 
                                                                   [CONOCO LOGO]
   
                               150,000,000 Shares
    
                                  Conoco Inc.
                              CLASS A COMMON STOCK
                            ------------------------
 
   
   Of the 150,000,000 shares of the Class A Common Stock of Conoco Inc. (the
   "Company" or "Conoco") being offered, 135,000,000 shares are being offered
 initially in the United States and Canada by the U.S. Underwriters (the "U.S.
Offering") and 15,000,000 shares are being offered initially outside the United
    States and Canada by the International Underwriters (the "International
Offering" and, together with the U.S. Offering, the "Offerings"). Each share of
 Class A Common Stock will have attached one Preferred Share Purchase Right (a
 "Right") which will initially trade together with the share. All of the shares
of Class A Common Stock offered hereby are being sold by the Company. The price
  to public and the underwriting discount per share will be identical for both
  Offerings. Prior to these Offerings, there has been no public market for the
 Class A Common Stock. It is currently estimated that the public offering price
 per share will be between $20 and $24. See "Underwriters" for a discussion of
 the factors to be considered in determining the initial public offering price.
    
   
  The Company has two classes of authorized common stock consisting of Class A
Common Stock offered hereby and Class B Common Stock (collectively, the "Common
Stock"). See "Description of Capital Stock." Holders of Class A Common Stock are
entitled to one vote per share and holders of Class B Common Stock are entitled
  to five votes per share on each matter submitted to a vote of stockholders.
    Prior to the Offerings, E. I. du Pont de Nemours and Company ("DuPont")
 indirectly owned 100 percent of the outstanding shares of the Company's Common
 Stock, and immediately after completion of the Offerings, DuPont, through its
     ownership of 100 percent of the outstanding Class B Common Stock, will
  indirectly own 75.2 percent of the Company's Common Stock representing 93.8
   percent of the combined voting power of all classes of voting stock of the
      Company (or 72.5 percent and 93.0 percent, respectively, if the U.S.
 Underwriters exercise their over-allotment option in full and the shares sold
      pursuant to the over-allotment option are sold only by the Company).
Accordingly, DuPont will continue to control the Company. DuPont has advised the
 Company that DuPont intends to offer its remaining Conoco shares in a tax-free
  split-off expected to be completed within 12 months of the date hereof. See
   "Prospectus Summary -- Separation From DuPont," "Arrangements Between the
                Company and DuPont" and "Principal Stockholder."
    
                            ------------------------
  The Class A Common Stock has been approved for listing on the New York Stock
Exchange ("NYSE") under the trading symbol "CLL," subject to official notice of
                                   issuance.
   
                            ------------------------
    
   
   SEE "RISK FACTORS" BEGINNING ON PAGE 16 FOR INFORMATION CONCERNING CERTAIN
          FACTORS THAT SHOULD BE CONSIDERED BY PROSPECTIVE INVESTORS.
    
                            ------------------------
 
  THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
       EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE
           SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES
      COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS.
           ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
 
                            ------------------------
    
                             PRICE $        A SHARE
    
                            ------------------------
 
<TABLE>
<CAPTION>
                                                                   PRICE TO       UNDERWRITING DISCOUNTS      PROCEEDS TO
                                                                    PUBLIC          AND COMMISSIONS(1)        COMPANY(2)
                                                                  ----------      ----------------------      -----------
<S>                                                               <C>             <C>                         <C>
Per Share...................................................             $                     $                       $
Total(3)....................................................             $                     $                       $
</TABLE>
 
- ---------------
    (1) The Company has agreed to indemnify the Underwriters against certain
        liabilities, including liabilities under the Securities Act of 1933, as
        amended. See "Underwriters."
   
    (2) Before deducting expenses payable by the Company, estimated at $20
        million.
    
   
    (3) The U.S. Underwriters have been granted an option, exercisable within 30
        days of the date hereof, to purchase up to an aggregate of 22,500,000
        additional shares of Class A Common Stock at the price to public shown
        above less underwriting discounts and commissions for the purpose of
        covering over-allotments, if any. If the U.S. Underwriters exercise such
        option in full, the total price to public and the underwriting discounts
        and commissions will be $        and $        , respectively. The
        additional shares to be sold under this option may, at the discretion of
        DuPont, be sold either by the Company or DuPont or a combination of the
        Company and DuPont. If the U.S. Underwriters exercise such option in
        full, and the shares are sold only by the Company, the proceeds to the
        Company will be $        . If such shares are sold only by DuPont, the
        Company will not receive any of the proceeds from the sale of such
        shares by DuPont. The actual option granted by the Company and/or DuPont
        will be described in the final prospectus. See "Underwriters."
    
                            ------------------------
    The Class A Common Stock is offered, subject to prior sale, when, as, and if
accepted by the Underwriters named herein and, subject to approval of certain
legal matters by Cravath, Swaine & Moore, counsel for the Underwriters, and to
certain other conditions. It is expected that delivery of the Class A Common
Stock will be made on or about             , 1998 at the offices of Morgan
Stanley & Co. Incorporated, New York, New York, against payment therefor in
immediately available funds.
 
                            ------------------------
 
MORGAN STANLEY DEAN WITTER
                    CREDIT SUISSE FIRST BOSTON
                                      GOLDMAN, SACHS & CO.
                                                    MERRILL LYNCH & CO.
J.P. MORGAN & CO.                                           SALOMON SMITH BARNEY
 
BT ALEX. BROWN                                               SCHRODER & CO. INC.
               , 1998
<PAGE>   4
 
   
     NO DEALER, SALESPERSON OR ANY OTHER PERSON IS AUTHORIZED IN CONNECTION WITH
ANY OFFERING MADE HEREBY TO GIVE ANY INFORMATION OR TO MAKE ANY REPRESENTATION
NOT CONTAINED IN THIS PROSPECTUS AND, IF GIVEN OR MADE, SUCH INFORMATION OR
REPRESENTATION MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED BY THE COMPANY
OR ANY UNDERWRITER. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO SELL OR A
SOLICITATION OF AN OFFER TO BUY ANY SECURITY OTHER THAN THE CLASS A COMMON STOCK
AND THE RIGHTS OFFERED HEREBY, NOR DOES IT CONSTITUTE AN OFFER TO SELL OR A
SOLICITATION OF AN OFFER TO BUY ANY SECURITIES OFFERED HEREBY TO ANY PERSON IN
ANY JURISDICTION IN WHICH IT IS UNLAWFUL TO MAKE SUCH AN OFFER OR SOLICITATION.
NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY SALE MADE HEREBY WILL UNDER ANY
CIRCUMSTANCES IMPLY THAT THE INFORMATION CONTAINED IN THIS PROSPECTUS IS CORRECT
AS OF ANY DATE SUBSEQUENT TO THE DATE OF THIS PROSPECTUS.
    
                            ------------------------
 
     UNTIL             , 1998 (25 DAYS AFTER THE COMMENCEMENT OF THE OFFERINGS),
ALL DEALERS EFFECTING TRANSACTIONS IN THE CLASS A COMMON STOCK, WHETHER OR NOT
PARTICIPATING IN THIS DISTRIBUTION, MAY BE REQUIRED TO DELIVER A PROSPECTUS.
THIS DELIVERY REQUIREMENT IS IN ADDITION TO THE OBLIGATION OF DEALERS TO DELIVER
A PROSPECTUS WHEN ACTING AS UNDERWRITERS AND WITH RESPECT TO THEIR UNSOLD
ALLOTMENTS OR SUBSCRIPTIONS.
                            ------------------------
 
     In addition to the Offerings, this Prospectus also relates to the offering
to Conoco employees of options to purchase Class A Common Stock and stock
appreciation rights with respect to Class A Common Stock upon surrender by such
employees of their options to purchase common stock of DuPont and of stock
appreciation rights with respect to DuPont common stock. See
"Management -- Treatment of Outstanding Stock Options and Stock Appreciation
Rights."
                            ------------------------
 
     For investors outside the United States: No action has been or will be
taken in any jurisdiction by the Company or by any Underwriter that would permit
a public offering of the Class A Common Stock or possession or distribution of
this Prospectus in any jurisdiction where action for that purpose is required,
other than in the United States. Persons into whose possession this Prospectus
comes are required by the Company and the Underwriters to inform themselves
about and to observe any restrictions as to the offering of the Class A Common
Stock and the distribution of this Prospectus.
 
     References to "dollars" and "$" in this Prospectus are to United States
dollars.
                            ------------------------
 
                               TABLE OF CONTENTS
 
   
<TABLE>
<CAPTION>
                                        PAGE
                                        ----
<S>                                     <C>
Prospectus Summary....................    5
Risk Factors..........................   16
Use of Proceeds.......................   22
Dividend Policy.......................   22
Capitalization........................   23
Selected Historical and Pro Forma
  Financial Information...............   24
Pro Forma Combined Financial
  Statements..........................   27
Management's Discussion and Analysis
  of Financial Condition and Results
  of Operations.......................   37
Business..............................   57
Management............................   86
Arrangements between the Company and
  DuPont..............................  108
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                        PAGE
                                        ----
<S>                                     <C>
Principal Stockholder.................  114
Description of Capital Stock..........  115
Shares Eligible for Future Sale.......  124
Material United States Federal Tax
  Considerations for Non-U.S. Holders
  of Class A Common Stock.............  125
Underwriters..........................  127
Legal Matters.........................  131
Experts...............................  131
Available Information.................  132
Index to Combined Financial
  Statements..........................  F-1
Annex A -- Report of DeGolyer and
  MacNaughton.........................  A-1
</TABLE>
    
 
                                        3
<PAGE>   5
 
     CERTAIN PERSONS PARTICIPATING IN THE OFFERINGS MAY ENGAGE IN TRANSACTIONS
THAT STABILIZE, MAINTAIN, OR OTHERWISE AFFECT THE PRICE OF THE CLASS A COMMON
STOCK. SPECIFICALLY, THE UNDERWRITERS MAY OVER-ALLOT THE CLASS A COMMON STOCK IN
CONNECTION WITH THE OFFERINGS, AND MAY BID FOR AND PURCHASE THE SHARES OF CLASS
A COMMON STOCK IN THE OPEN MARKET. FOR A DESCRIPTION OF THESE ACTIVITIES, SEE
"UNDERWRITERS."
 
                DISCLOSURE REGARDING FORWARD-LOOKING INFORMATION
 
     This Prospectus contains forward-looking statements relating to the
Company's operations that are based on management's current expectations,
estimates and projections about the Company and the petroleum industry. Words
such as "expects," "intends," "plans," "projects," "believes," "estimates" and
similar expressions are used to identify such forward-looking statements. These
statements are not guarantees of future performance and involve certain risks,
uncertainties and assumptions that are difficult to predict. Further, certain
forward-looking statements are based upon assumptions as to future events that
may not prove to be accurate. Therefore, actual outcomes and results may differ
materially from what is expressed or forecast in such forward-looking
statements.
 
     Factors that could cause actual results to differ materially include, but
are not limited to, crude oil and natural gas prices; refining and marketing
margins; potential failure to achieve expected production from existing and
future oil and gas development projects; lack of exploration success; potential
disruption or interruption of the Company's production facilities due to
accidents or political events; international monetary conditions and exchange
controls; potential liability for remedial actions under existing or future
environmental regulations; and potential liability resulting from pending or
future litigation. In addition, such statements could be affected by general
domestic and international economic and political conditions. See "Risk
Factors."
 
                          ORGANIZATION OF THE COMPANY
 
   
     Since 1981, business operations of the Company have been conducted by
various entities owned directly or indirectly by DuPont. Prior to the Offerings,
these operations will have been substantially reorganized and, as of the
Offerings, certain entities and, in some cases, assets, liabilities, and related
operations will be transferred between the Company and DuPont. See "Arrangements
Between the Company and DuPont." Unless the context otherwise indicates,
references in this Prospectus to "Conoco" or the "Company" are references to
Conoco Inc. (formerly Conoco Energy Company), its wholly owned and majority
owned subsidiaries (collectively, the "Combined Subsidiaries"), and its
ownership interest in equity affiliates (corporate entities, partnerships,
limited liability companies and other ventures in which Conoco exerts
significant influence by virtue of its ownership interest, typically between 20
and 50 percent). Unless the context otherwise indicates, references in this
Prospectus to "DuPont" are references to E. I. du Pont de Nemours and Company
and its consolidated subsidiaries. Financial information included herein is
presented in accordance with Generally Accepted Accounting Principles and
accounts for the Company's interests in equity affiliates using the equity
method of accounting.
    
 
   
     Unless otherwise indicated or unless the context otherwise requires, all
information in this Prospectus: (i) gives effect to the amendment to the
Company's Certificate of Incorporation to change the Company's authorized
capital stock to Class A Common Stock, par value $.01 per share, Class B Common
Stock, par value $.01 per share, and Preferred Stock, par value $.01 per share
("Preferred Stock"), and (ii) gives effect to the conversion of each outstanding
share of the Company's current common stock, par value $.01 per share, into
shares of its newly created Class B Common Stock. References in this Prospectus
to "Common Stock" are to the Class A Common Stock and Class B Common Stock of
the Company. See "Description of Capital Stock."
    
 
                                        4
<PAGE>   6
 
                               PROSPECTUS SUMMARY
 
     The following summary is qualified in its entirety by and should be read in
conjunction with the more detailed information and financial statements and
related notes appearing elsewhere in this Prospectus. Unless otherwise
indicated, the information contained in this Prospectus (i) gives effect to the
transactions described below under "-- Separation from DuPont" and (ii) assumes
no exercise of the Underwriters' over-allotment option.
 
                                  THE COMPANY
 
   
     Conoco is a major, integrated, international energy company operating in 40
countries worldwide. The Company was founded in 1875 and acquired by DuPont in
1981 and is involved in both the "Upstream" and "Downstream" segments of the
petroleum business. Upstream activities include exploring for, and developing,
producing and selling crude oil, natural gas and natural gas liquids. Downstream
activities include refining crude oil and other feedstocks into petroleum
products, buying and selling crude oil and refined products and transporting,
distributing and marketing petroleum products. As of December 31, 1997, Conoco
had proved worldwide reserves of 2.6 billion barrels of oil equivalent ("BOE"),
38 percent of which were natural gas. Conoco owns or has equity interests in
nine refineries worldwide, with a total crude oil and condensate processing
capacity of approximately 799,000 barrels per day (including the new Melaka
refinery in Malaysia, which Conoco expects will be completed in the fourth
quarter of 1998). The Company also has a marketing network of approximately
7,900 outlets in the United States, Europe and Asia. Based on public filings,
for the year ended December 31, 1997, Conoco ranked eighth in the worldwide
production of petroleum liquids by U.S.-based companies, eleventh in the
production of natural gas and eighth in refining throughput. Over that same
period, Conoco reported net income of $1,097 million on total revenues of $26.3
billion.
    
 
UPSTREAM
 
     Conoco has ownership interests in producing properties in the United
States, Canada, the United Kingdom, Norway, Venezuela, Indonesia, the United
Arab Emirates, Russia and Nigeria. For the year ended December 31, 1997, North
America and Western Europe represented 29 percent and 36 percent, respectively,
of total reserves and 45 percent and 38 percent, respectively, of total
production. Conoco's interest in proved reserves from the Petrozuata joint
venture in Venezuela represented 26 percent of the Company's total reserves as
of December 31, 1997.
 
     In 1997, the Company's production averaged 654,000 BOE per day, consisting
of 453,000 barrels of petroleum liquids (including natural gas liquids from gas
plant ownership) and 1.2 billion cubic feet of natural gas per day. Based on
1997 annual production of 209 million BOE (excluding natural gas liquids from
gas plant ownership), the Company had a reserve life of 12.4 years as of
December 31, 1997. Over the last five years, Conoco has replaced an average of
190 percent of the crude oil and natural gas it has produced each year. In
addition, Conoco has concentrated on improving its Upstream portfolio by
lowering costs, consolidating operations, rationalizing assets and refocusing
its exploration efforts. Over the past five years, Conoco has sold hundreds of
small, marginal interests, reducing the number of fields in which it owns an
interest from approximately 700 in 1990 to 136 as of June 30, 1998, while
maintaining production essentially constant on a BOE basis. At the same time,
Conoco has increased its profitability on a BOE basis.
 
     As Conoco has reduced its marginal interests, it has increased its share of
larger, longer-lived and more profitable projects. The Company believes these
projects will contribute to 1999 production and significantly increase Conoco's
production rates over current levels in future years. In North America, these
projects include development of the Lobo trend in South Texas and the Ursa field
in the Gulf of Mexico. In 1997, the Company substantially increased its holdings
in the Lobo trend in South Texas through the acquisition of approximately $0.9
billion of natural gas properties and transportation assets (the "Lobo
Acquisition"). Since June 30, 1997, gross natural gas production from Conoco's
Lobo trend assets has increased from approximately 450 million cubic feet per
day to approximately 700 million cubic feet per day at June 30, 1998. The
Company expects to spend $1 billion between 1997 and 2002 to develop its leases
in the Lobo trend. Conoco also has a 16 percent interest in the Shell-operated
Ursa field ("Ursa"), one of the largest discoveries to date
                                        5
<PAGE>   7
 
in the deepwater Gulf of Mexico. The Company expects first production from Ursa
in mid-1999 and that peak gross production from Ursa will be 150,000 barrels of
petroleum liquids and 400 million cubic feet of natural gas per day. Conoco also
has significant producing properties in the San Juan Basin in New Mexico, the
Permian Basin in West Texas, the foothills east of the Canadian Rocky Mountains
and the Central Appalachian Basin in Virginia. The Company also ranks as the
fourth largest natural gas liquids ("NGLs") producer in the United States with
ownership interests in 25 plants located in Colorado, Louisiana, New Mexico,
Oklahoma and Texas.
 
   
     Conoco has a significant portfolio of producing properties, discoveries and
near-term development projects in the United Kingdom and Norway. Conoco has a 42
percent ownership interest in the Britannia field ("Britannia"), one of the
largest natural gas fields in the United Kingdom sector of the North Sea, which
Conoco operates jointly with Chevron. First production from Britannia occurred
in August 1998 and the Company estimates that the field will have a production
life of 30 years. The Company believes that Britannia has the potential to
produce between 650 and 740 million cubic feet of natural gas per day (gross).
Conoco also has an 18.125 percent interest in the Heidrun field in Norway, where
production began in 1995 and is currently averaging 205,000 barrels of petroleum
liquids per day (gross). Conoco was the operator for the construction and
installation of the Heidrun tension leg platform. In addition to Conoco's
interests in Britannia and Heidrun, Conoco also has interests in a number of
other offshore fields including the Miller, Statfjord, Alba, MacCulloch, Banff,
Viking, Vulcan and Murdoch fields and the Clair discovery in the United Kingdom
and the Statfjord and Troll fields in Norway. Clair, which is operated by
British Petroleum, is one of the largest undeveloped oil discoveries in Western
Europe. Conoco operates the MacCulloch and Banff fields, both of which will
employ innovative floating production, storage and offtake ("FPSO") technology.
Conoco is also the sixth largest oil producer in Norway.
    
 
   
     In Venezuela, Conoco holds a 50.1 percent non-controlling equity interest
in Petrozuata C.A. ("Petrozuata"), a joint venture with PDVSA Petroleo y Gas
S.A., a subsidiary of Petroleos de Venezuela ("PDVSA"), the national oil company
of the Republic of Venezuela. Petrozuata, the first venture of its kind in
Venezuela, will upgrade extra heavy crude oil into a lighter, partially
processed refinery feedstock similar to crude oil ("Synthetic Crude") and
by-products using the Company's proprietary delayed coking technology. The
Petrozuata joint venture agreement has a 35-year term and Conoco's equity
interest in proved reserves from Petrozuata is 680 million barrels of oil,
representing 26 percent of the Company's total reserves at December 31, 1997.
Petrozuata began producing extra heavy crude oil in August 1998, and the Company
expects Petrozuata to have production of 120,000 barrels per day (gross) by the
time the project's upgrading facility becomes operational.
    
 
     Conoco is also working to expand its existing operations in the Asia
Pacific and Russia/Caspian Sea regions into additional major business areas. In
Asia Pacific, Conoco is the operator under a production sharing contract
relating to Block B of the Indonesian sector of the Natuna Sea, which the
Company believes may contain in excess of one trillion cubic feet of natural gas
(Conoco's interest in the Block B production sharing contract is 40 percent).
The Company is one of several companies party to an agreement with Pertamina,
the Indonesian state oil company, pursuant to which Conoco and other companies
in the region intend to jointly market natural gas from Natuna to companies in
Singapore, assuming satisfaction of certain conditions. In Russia, Conoco has
signed a memorandum of understanding with OAO Lukoil ("Lukoil"), the Russian
Federation's largest oil company, to jointly study the development of petroleum
reserves in the 1.2 million acre block known as the Northern Territories in the
Timan-Pechora region in Northern Russia, which includes the large undeveloped
Yuzhno Khilchuyu oilfield. Such a development would complement the Company's
producing Polar Lights joint venture, the first joint venture between Russia and
a Western oil company to develop a major new oil field.
 
     Since 1996, Conoco has pursued and continues to implement an exploration
strategy focused on acquiring large acreage positions in areas that are
relatively under-explored. The purpose of these acreage acquisitions has been to
establish Conoco at an early stage in areas that have the potential for large
discoveries. Conoco has acquired significant acreage in the deepwater Gulf of
Mexico, the Atlantic Margin of the North Sea, the La Luna trend in Northern
South America and the Caribbean, and selected basins in the Asia Pacific region.
                                        6
<PAGE>   8
 
Conoco has applied 3D seismic and other technologies to evaluate its acreage,
and has recently begun drilling programs to test the potential of this acreage.
Conoco is the seventh largest leaseholder in the deepwater Gulf of Mexico, with
interests in 271 leases in over 1,000 feet of water. Conoco has a 100 percent
interest in 130 of these leases and jointly owns 76 of the remaining leases on a
50/50 basis with Shell. In late 1998, Conoco intends to commence a five-year,
$400 million deepwater drilling program in the Gulf of Mexico with one of two
highly sophisticated drillships being constructed for joint ventures between
Conoco and R&B Falcon Corporation.
 
   
     For the year ended December 31, 1997, Upstream reported earnings of $884
million on sales and other operating revenues of $5.3 billion. Capital
investments, including the Lobo Acquisition, were $2.5 billion in 1997 and are
expected to be $1.8 billion in 1998, with the largest expenditures being made in
the continued development of the Lobo trend, Britannia, Petrozuata and Ursa.
    
 
DOWNSTREAM
 
     The Company's Downstream activities are predominately located in North
America and Europe, with additional operations being developed in the Asia
Pacific region. The Company operates four wholly owned refineries in the United
States and one in the United Kingdom. It also has equity interests in one
refinery in Germany, two refineries in the Czech Republic and the Melaka
refinery, which is nearing completion in Malaysia. Total refined product sales
were approximately one million barrels per day in 1997. Marketing activities
include selling gasoline, diesel fuels and motor oils under the "Conoco", "Jet",
"Seca" and other brand names through approximately 4,900 outlets in the United
States, 2,900 outlets in Europe and 100 outlets in Asia. Approximately 23
percent of these outlets are Company-owned.
 
   
     Conoco has significantly improved its competitive position by increasing
asset utilization and reducing overhead and operating costs. The Company
instituted major efficiency enhancing projects at its principal refineries in
both the U.S. and Europe. The Company's Humber refinery in the United Kingdom
and the Company's joint venture OMW refinery in Germany (in which the Company
owned a 25 percent interest) were ranked in the top quartile of Western European
refineries in 1996 (in the net margin, return on investment, processing
efficiency and volumetric expansion categories) by Solomon Associates, an
independent benchmarking company. This ranking was based on both financial and
operating performance. This competitive position was further improved through
synergies gained by formation of the MiRO joint venture (an 18.75 percent
Company interest), which combined the OMW refinery with a neighboring Esso
refinery.
    
 
     Downstream's principal strengths include the processing of heavy, high
sulfur and acidic crudes, upgrading bottom-of-the-barrel feedstocks via coking
technology, running low-cost, high-volume retail marketing operations and
developing specialty products. Approximately 50 percent of the Company's
worldwide refining capacity is designed to process heavy, high sulfur crude.
This allows the Company to purchase cheaper grades of crude oil with high levels
of sulfur and to process them into high grade petroleum products. Recent
investments designed to capitalize on these strengths include Excel Paralubes, a
50/50 joint venture between the Company and Pennzoil Company ("Pennzoil"), which
recently completed construction of a $500 million lube oil hydrocracker at the
Company's Lake Charles, Louisiana, refinery that produces hydrocracked base oil.
The Company made $250 million in improvements in the Lake Charles refinery to
facilitate this project. The Company also recently upgraded its refinery in the
United Kingdom to process acidic North Sea crude oils. Recent expansion projects
include the Company's new joint venture refinery in Melaka, Malaysia (in which
the Company has a 40 percent interest) which will have a gross refining capacity
of 100,000 barrels per day. Startup of the Melaka refinery was initiated in
August 1998 with the commissioning of the crude unit. A staggered startup of the
other units in the refinery will occur between August and November 1998. By
developing and applying its coking technology to nearly all of its refineries,
the Company has become a world leader in the petroleum coke market and the
manufacture of specialty cokes for use in the steel and aluminum industries. The
Company has also established a marketing presence in Central and Eastern Europe,
and Southeast Asia, where it is a leading operator of low-cost, high-volume
retail stations.
 
                                        7
<PAGE>   9
 
   
     For the year ended December 31, 1997, Downstream reported earnings of $307
million on sales and other operating revenues of $20.0 billion. Downstream
capital investments were $558 million in 1997. The Company expects to make
capital investments of approximately $600 million in 1998, primarily relating to
the completion of the Melaka refinery, expansion of European and Asian retail
operations and the upgrading of its U.S. and European refineries, including
initial work at Lake Charles to facilitate the processing of Petrozuata
Synthetic Crude.
    
 
BUSINESS STRATEGY
 
     Conoco intends to pursue a growth-oriented business strategy by: (a)
exploiting growth opportunities where Conoco has existing major areas of
operation, (b) creating at least two new major business areas in Northern South
America and the Caribbean, and the Asia Pacific, Middle East or Russia/Caspian
Sea regions and (c) continuing to improve the profitability, efficiency and
effectiveness of its existing operations. Specifically, the Company intends to:
 
     - Manage its portfolio to increase the proportion of Upstream assets
       relative to Downstream assets and the proportion of large-scale,
       long-lived, early-life cycle assets relative to mature assets.
 
     - Achieve significant near-term production growth through the
       implementation of large-scale projects such as Petrozuata, Britannia,
       Lobo and Ursa.
 
     - Seek opportunities created by worldwide privatizations and the opening of
       new markets previously closed to private investment.
 
     - Apply its strengths in carbon upgrading, project management, deepwater
       technology, natural gas processing, seismic processing and
       interpretation, and the ability to present integrated Upstream/
       Downstream solutions to host governments and other institutions in new
       and emerging markets.
 
     - Pursue exploration activities that have significant value creation
       potential by concentrating on areas that are under-explored.
 
     - Capitalize on the Company's ability to convert low-cost, heavy, high
       sulfur and acidic crude oils into high-value light oil products.
 
     - Continuously rationalize its asset base, contain costs, optimize its
       investment portfolio, and improve operating reliability.
 
In all of its activities, the Company will strive to act in accordance with its
core values: operating safely, protecting the environment, acting ethically and
valuing all people.
 
   
RISK FACTORS
    
 
   
     Prospective investors should consider carefully the matters set forth under
the caption "Risk Factors," as well as the other information set forth in this
Prospectus, including the uncertainty of supply and demand in the crude oil,
natural gas and refined products markets, the volatility of crude oil, natural
gas and refined product prices, the possibility of sustained depressed prices,
the Company's need to replace its crude oil and natural gas reserves depleted
through production, the uncertainty of the Company's estimates of its proved
reserves, control of the Company by DuPont prior to the divestiture of its
ownership interest in the Company, changes in the Company's ongoing relationship
with DuPont, competition, drilling risks, operating hazards, potential
disruption or interruption of the Company's production or refining facilities
due to political events, international monetary conditions and exchange
controls, the potential adverse effects of disparate voting rights of two
classes of Common Stock, the impact of environmental and other governmental
regulation, certain anti-takeover provisions in the Company's Certificate of
Incorporation and By-laws, the absence of a prior public market for the Class A
Common Stock, and the presence of a significant number of shares of Common Stock
which are eligible for future sale by DuPont. One or more of such matters could
negatively impact the Company's ability to implement successfully its business
strategy as described above.
    
 
                                        8
<PAGE>   10
 
                                 THE OFFERINGS
 
   
Class A Common Stock
  Offered(1):
    
 
   
  U.S. Offering............  135,000,000 shares
    
 
   
  International Offering...   15,000,000 shares
    
 
   
     Total.................  150,000,000 shares
    
 
   
Common Stock to be
outstanding after the
  Offerings(1)(2):
    
 
   
  Class A Common Stock.....  150,000,000 shares
    
 
   
  Class B Common Stock.....  455,500,000 shares
    
 
   
     Total.................  605,500,000 shares
    
 
   
Use of Proceeds............  The estimated net proceeds of approximately $3,148
                             million to be received by the Company from the
                             Offerings will be used to repay outstanding
                             indebtedness owed to DuPont. See "Use of Proceeds."
    
 
   
Dividend Policy............  The Company currently intends to pay quarterly cash
                             dividends on the Class A Common Stock and Class B
                             Common Stock, subject to financial results and
                             declaration by the Board of Directors. The Company
                             expects to pay an initial dividend in March 1999
                             representing a pro rata dividend for the period
                             from the date of the Offerings to December 31,
                             1998. There can be no assurance, however, that this
                             dividend or any future dividends will be declared
                             or paid. See "Dividend Policy."
    
 
   
Voting Rights:
    
 
  Class A Common Stock.....  1 vote per share
 
  Class B Common Stock.....  5 votes per share
 
Other Common Stock
Provisions.................  Apart from the different voting rights described
                             above, the holders of Class A Common Stock and
                             Class B Common Stock generally have identical
                             rights, except that the holders of Class A Common
                             Stock are not eligible to vote on any alteration of
                             the powers, preferences or special rights of the
                             Class B Common Stock that would not adversely
                             affect the Class A Common Stock. See "Description
                             of Capital Stock."
 
Proposed NYSE symbol.......  "CLL"
 
Rights.....................  One Right will be attached to each share of Class A
                             Common Stock sold in the Offerings. See
                             "Description of Capital Stock -- Anti-Takeover
                             Effects of Certain Certificate and By-Law
                             Provisions -- Rights Plan."
   
- ---------------
    
 
   
(1) Assumes that the U.S. Underwriters do not exercise their over-allotment
    option to purchase up to an aggregate of 22,500,000 additional shares of
    Class A Common Stock.
    
 
   
(2) Does not include shares of Class A Common Stock that will be issuable in
    connection with Common Stock-based employee benefit awards awarded at the
    time of the Offerings (not all of which will be immediately exercisable),
    and other Common Stock-based employee benefit awards that will be issued
    upon cancellation of DuPont stock-based employee benefit awards. See
    "Management -- Compensation of Executive Officers" and "-- Treatment of
    Outstanding Stock Options and Stock Appreciation Rights."
    
 
                                        9
<PAGE>   11
 
                             SEPARATION FROM DUPONT
 
   
     Since 1981, the Company's business operations have been conducted by
various entities owned directly or indirectly by DuPont. In May 1998, DuPont and
the Company announced their intention to create a separate company composed of
the oil and gas businesses and operations that will comprise the Company after
the Offerings, and the associated assets and liabilities of such businesses and
operations (the "Separation"). The Company believes that the Separation will be
substantially completed, including the transfer of substantially all of such
assets and liabilities, by the date of the Offerings. DuPont has announced that
it intends to divest its remaining ownership interest in Conoco within 12 months
of the date hereof through a "split-off" (an offering to DuPont shareholders of
the opportunity to exchange shares of DuPont common stock for Class B Common
Stock of Conoco). The split-off will be subject to (i) certain legal conditions,
including the receipt of a favorable tax ruling from the Internal Revenue
Service as to the tax-free nature of the split-off, and (ii) the absence of any
material change in market conditions or other unanticipated circumstances that
cause the Board of Directors of DuPont to conclude that such transaction was not
in the best interests of the shareholders of DuPont.
    
 
   
     The Separation is intended to establish the Company as a stand-alone entity
with objectives separate from those of DuPont. DuPont and the Company believe
that the Separation will (a) create a structure which will enable the Company to
have better access to capital markets, (b) permit the Company to adopt a more
aggressive investment program in new and capital-intensive oil and gas projects,
(c) facilitate future partnerships, combinations and other arrangements with
other entities in the oil and gas business, (d) allow the Company to offer
incentives to its employees that are more closely linked to the Company's
performance and (e) facilitate comparisons with other major, international
integrated energy companies.
    
 
   
     After completion of the Offerings, DuPont will own 100 percent of the
outstanding Class B Common Stock, which will represent 93.8 percent of the
combined voting power of all classes of voting stock of the Company. See
"Principal Stockholder." Until such time as DuPont holds less than 50 percent of
the voting power of outstanding common stock of the Company, DuPont will be able
to control the vote on all matters submitted to stockholders, including the
election of directors and the approval of extraordinary corporate transactions.
See "Risk Factors -- Control by DuPont; Potential Conflicts of Interest."
    
 
   
     Historically, the Company and its business operations have derived tangible
and intangible benefits from being owned by DuPont. The Company and DuPont have
entered into certain ancillary agreements which govern various interim and
ongoing relationships between the two companies, including agreements with
respect to employee benefit arrangements, information management, the provision
of interim services, financing arrangements, tax sharing, environmental
liabilities and various commercial arrangements, such as the supply of natural
gas by the Company to DuPont. While these agreements will continue to benefit
the Company, the Company is only entitled to the ongoing assistance of DuPont
for a limited time and it may not enjoy benefits from its relationship with
DuPont beyond the term of the agreements. These agreements were in most cases
developed in connection with the Separation and were not the result of
arm's-length negotiations between independent parties. See "Risk
Factors -- Limited Operating History; Limited Relevance of Historical Financial
Information" and "Arrangements Between the Company and DuPont."
    
 
   
     In July 1998, a dividend of $7.5 billion was paid by the Company to DuPont
in the form of a promissory note. The promissory note is due January 2, 2000 and
bears interest at an annual interest rate of 6.0125 percent. The Company will
use the net proceeds of the Offerings and its cash and cash equivalents in
excess of $225 million (excluding $70 million of additional monetary assets held
by the Company's captive insurance company and its subsidiaries) to repay or
purchase debt owed to DuPont. On September 28, 1998, the Company declared a
dividend of a receivable from DuPont evidenced by a promissory note in the
amount of $700 million.
    
 
     DuPont has historically guaranteed certain obligations and liabilities of
the Company and its subsidiaries and affiliates. Certain of these guarantees
will remain in place after the Separation pursuant to their terms. The Company
will indemnify DuPont for any liabilities DuPont may incur pursuant to these
guarantees.
 
                                       10
<PAGE>   12
 
   
     Certain international assets relating primarily to the business of DuPont
may be held by the Company or its subsidiaries at the closing of the Offerings
pending receipt of consents or other approval or satisfaction of other
applicable foreign requirements necessary for the transfer of such assets to
DuPont. In addition, certain international assets relating primarily to the
business of the Company may be held by DuPont or other of its subsidiaries at
the closing of the Offerings pending receipt of consents or approvals or
satisfaction of other applicable foreign requirements necessary for the transfer
of such assets to the Company. The financial and other information included
herein assumes the consummation of all such transactions. Additionally, such
information reflects the inclusion of certain subsidiaries of DuPont which will
not be owned by the Company as of the closing of the Offerings and which DuPont
will not thereafter be obligated to transfer to the Company. DuPont and the
Company intend to negotiate for the sale of such subsidiaries within the six
months following the Offerings at a purchase price equal to their then fair
market value. DuPont and the Company estimate that the fair market value of such
subsidiaries at August 1998 was approximately $20 million and cannot predict at
what price any such sale may occur. All of the above subsidiaries, which are
immaterial to total assets and results of operations of the Company, have been
included in the Combined Financial Statements.
    
 
   
     Following the Offerings, certain pension assets will be held in trust with
the DuPont Pension and Retirement Plan. As of the date on which DuPont ceases to
own securities representing 80 percent or more of the voting power and
representing 80 percent or more of the economic value of all of the outstanding
shares of Common Stock, the Company will adopt a qualified defined benefit
retirement plan. In this event, the trust associated with the Company plan will
receive, assuming satisfaction of certain conditions, a transfer of assets and
liabilities on behalf of the Company's current and former employees from the
DuPont Pension and Retirement Plan. Other employee benefit trusts established by
the Company will continue following the Separation.
    
 
     The Separation Agreement (as defined in "Arrangements Between the Company
and DuPont") provides that the Company will, subject to certain exceptions,
apply the net proceeds of any additional indebtedness or the issuance of equity
securities by the Company, including the net proceeds of the Offerings, to repay
debt owed to DuPont.
 
     Generally, all one-time costs, including fees and taxes, directly relating
to the Offerings or the Separation are to be paid by DuPont under the terms of
the Separation Agreement.
 
                                       11
<PAGE>   13
 
   
                SUMMARY HISTORICAL AND PRO FORMA FINANCIAL DATA
    
 
     The following table sets forth summary combined historical and pro forma
financial data of the Company as of the dates and for the periods indicated. The
statement of income data for each of the years in the three-year period ended
December 31, 1997, and the historical balance sheet data as of December 31, 1996
and 1997, have been derived from the Combined Financial Statements audited by
PricewaterhouseCoopers LLP, independent accountants. The statement of income
data for the years ended December 31, 1993 and 1994, and the six months ended
June 30, 1997 and 1998, and the historical balance sheet data as of December 31,
1993, 1994, 1995, and June 30, 1998 are based on the accounting records of
DuPont which, in the opinion of the Company's management, include all
adjustments necessary for the fair presentation of the financial position at
such dates and the results of operations for such respective interim periods.
The results for the six months ended June 30, 1998, are not necessarily
indicative of results to be expected for the full fiscal year or any interim
period. The financial information included herein may not necessarily reflect
the results of operations, financial position and cash flows of the Company in
the future or what the results of operations, financial position and cash flows
would have been had the Company been a separate, stand-alone entity during the
periods presented.
 
     The pro forma financial data have been derived from the Pro Forma Combined
Financial Statements which were prepared by the Company to illustrate the
estimated effects of the Offerings and related transactions described in the
Notes to the Pro Forma Combined Financial Statements as if the Offerings and
related transactions had occurred as of the beginning of the periods presented,
for purposes of the pro forma combined statements of income and as of June 30,
1998, for purposes of the pro forma combined balance sheet. In addition, the Pro
Forma Combined Financial Statements do not purport to represent what the results
of operations or financial position of the Company would actually have been if
the Offerings and related transactions had in fact occurred on such dates or to
project the results of operations or financial position of the Company for any
future period or date. The following data should be read in conjunction with,
and are qualified by reference to, the Combined Financial Statements, the
Interim Combined Financial Statements, the Pro Forma Combined Financial
Statements, and "Management's Discussion and Analysis of Financial Condition and
Results of Operations" included elsewhere in this Prospectus.
 
POST-OFFERINGS CHARGE
 
   
     Subject to completion of the Offerings, the Company and DuPont expect to
give certain current employees of the Company the option, subject to specific
country tax and legal requirements, to participate in a program (the "Option
Program") involving the cancellation of all or part of their options to purchase
DuPont common stock or appreciation rights ("SARs") with respect to DuPont
common stock and the issuance by the Company upon such cancellation of
comparable options to acquire Class A Common Stock or SARs with respect to Class
A Common Stock. Participation in the Option Program will be deemed a change in
the terms of certain awards granted to Conoco employees. As a result, the
Company will incur a non-cash charge to compensation expense, in the quarter the
Offerings are completed, of approximately $100 to 200 million after-tax
depending on the market price of DuPont common stock at the time of the
cancellation and issuance and the number of outstanding Conoco employee options
to purchase DuPont common stock canceled. Since the cancellation and issuance
would be a one-time event occurring after the Offerings, the charge is not
reflected in the Pro Forma financial information included in this Prospectus.
See "Management -- Treatment of Outstanding Stock Options and Stock Appreciation
Rights."
    
 
                                       12
<PAGE>   14
 
   
<TABLE>
<CAPTION>
                                                                                                    PRO FORMA        PRO FORMA
                                                                                                   AS ADJUSTED    AS ADJUSTED FOR
                                                                               SIX MONTHS ENDED    FOR THE YEAR   THE SIX MONTHS
                                         YEAR ENDED DECEMBER 31,                   JUNE 30,           ENDED            ENDED
                             -----------------------------------------------   -----------------   DECEMBER 31,      JUNE 30,
                              1993      1994      1995      1996      1997      1997      1998         1997            1998
                             -------   -------   -------   -------   -------   -------   -------   ------------   ---------------
                                                             (IN MILLIONS, EXCEPT PER SHARE DATA)
<S>                          <C>       <C>       <C>       <C>       <C>       <C>       <C>       <C>            <C>
STATEMENT OF INCOME DATA:
Total Revenues(1)..........  $19,687   $19,433   $20,518   $24,416   $26,263   $12,600   $11,486     $26,179          $11,433
Cost of Goods Sold and
  Other Operating
  Expenses.................   11,349    10,640    11,146    14,560    16,226     7,667     6,754      16,226            6,754
Selling, General and
  Administrative
  Expenses.................      651       679       728       755       726       355       370         726              370
Exploration Expenses.......      361       357       331       404       457       192       176         457              176
Depreciation, Depletion and
  Amortization.............    1,428     1,244     1,067     1,085     1,179       516       505       1,179              505
Taxes Other Than on
  Income(1)................    4,652     5,477     5,823     5,637     5,532     2,669     2,896       5,532            2,896
Interest and Debt
  Expense..................       67        63        74        74        36        24         1         204               92
                             -------   -------   -------   -------   -------   -------   -------     -------          -------
Income Before Income
  Taxes....................    1,179       973     1,349     1,901     2,107     1,177       784       1,855              640
Provision for Income
  Taxes....................      424       551       774     1,038     1,010       590       254         928              218
                             -------   -------   -------   -------   -------   -------   -------     -------          -------
        Net Income(2)......  $   755   $   422   $   575   $   863   $ 1,097   $   587   $   530     $   927          $   422
                             =======   =======   =======   =======   =======   =======   =======     =======          =======
Segment Net Income:
Upstream...................  $   481   $   498   $   492   $   681   $   884   $   454   $   359
Downstream.................      324       241       233       289       307       181       181
Corporate and Other(2).....      (50)     (317)     (150)     (107)      (94)      (48)      (10)
                             -------   -------   -------   -------   -------   -------   -------
                             $   755   $   422   $   575   $   863   $ 1,097   $   587   $   530
                             =======   =======   =======   =======   =======   =======   =======
Pro Forma Earnings Per
  Share:
  Basic....................                                                                          $  1.53          $  0.70
  Diluted..................                                                                          $  1.52          $  0.69
Pro Forma Weighted Average
  Shares Outstanding:
  Basic....................                                                                              606              606
  Diluted..................                                                                              611              611
 
OTHER DATA:
Cash Provided by
  Operations...............  $ 2,132   $ 2,143   $ 1,924   $ 2,396   $ 2,876   $   855   $   548
Capital Expenditures and
  Investments..............    1,743     1,665     1,837     1,944     3,114     1,815     1,050
</TABLE>
    
 
- ---------------
(1) Includes petroleum excise taxes of $4,478, $5,291, $5,655, $5,461 and $5,349
    for 1993 through 1997 and $2,577 and $2,806 for the first six months of 1997
    and 1998, respectively.
 
(2) Includes after-tax exchange gains (losses) of $60, $(143), $(40), $(7), and
    $21 for 1993 through 1997 and $5 for both the first six months of 1997 and
    1998, and $(25) for the pro forma as adjusted for 1997 and $(8) for the pro
    forma as adjusted for the first six months of 1998.
 
   
<TABLE>
<CAPTION>
                                                                                                                       PRO FORMA
                                                                          DECEMBER 31,                                AS ADJUSTED
                                                         -----------------------------------------------   JUNE 30,    JUNE 30,
                                                          1993      1994      1995      1996      1997       1998        1998
                                                         -------   -------   -------   -------   -------   --------   -----------
                                                                                      (IN MILLIONS)
<S>                                                      <C>       <C>       <C>       <C>       <C>       <C>        <C>
BALANCE SHEET DATA:
Cash and Cash Equivalents..............................  $   271   $   319   $   286   $   846   $ 1,147   $   829      $   225
Working Capital........................................    1,893     1,790       999       862       567       276          294
Net Property, Plant and Equipment......................    9,473     9,522     9,758    10,082    10,828    11,048       11,048
Total Assets...........................................   14,809    15,271    14,229    15,226    17,062    17,164       15,420
Long-Term Borrowings -- Related Parties................    2,102     2,279     2,141     2,287     1,450     1,181           --
Long-Term Borrowings -- Other Related Party............       --        --        --        --        --        --        4,926
Other Long-Term Borrowings and Capital Lease
  Obligations..........................................      304       342        65       101       106       103          103
Owner's Net Investment and Accumulated Other
  Comprehensive Loss/Stockholders' Equity..............    7,462     7,274     6,754     6,579     7,896     8,223        3,845
</TABLE>
    
 
                                       13
<PAGE>   15
 
<TABLE>
<CAPTION>
                                          1993     1994     1995     1996     1997
                                         ------   ------   ------   ------   ------
<S>                                      <C>      <C>      <C>      <C>      <C>
OPERATING DATA:
Proved Reserves at December 31(1):
  Oil (MMbbls)(2)......................     983      988      977      973    1,624
  Natural Gas (Bcf)....................   3,971    4,674    5,048    5,396    5,861
  Total Proved Reserves (MMBOE)(3).....   1,645    1,767    1,818    1,872    2,601
International Proved Reserves (% of
  Total)...............................      58%      61%      63%      65%      73%
Reserve Replacement Ratio(1)...........      89%     157%     127%     126%     448%
Reserve Life (years)(1)(4).............     7.7      8.2      9.3      8.9     12.4
Finding and Development Costs per
  BOE(1)(3)(5).........................  $ 6.79   $ 6.24   $ 5.39   $ 4.84   $ 3.63
Average Daily Production(1):
  Oil (Mbbls/day)(2)...................     434      436      424      454      453
  Natural Gas (MMcf/day)...............   1,301    1,327    1,126    1,211    1,203
  Total Production (MBOE/day)(3).......     651      657      612      656      654
Average Production Costs per
  BOE(3)(6)............................  $ 3.97   $ 3.59   $ 3.92   $ 3.84   $ 4.21
Refinery Capacity at December 31
  (Mbbls/day)(1)(7)....................     595      602      621      743      754
Refinery Utilization(7)................      95%      99%      97%      83%      91%
Total Refinery Inputs
  (Mbbls/day)(1)(8)....................     674      697      721      732      780
Sales of Refined Products
  (Mbbls/day)(1).......................     876      931      983      998    1,048
Retail Marketing Outlets at December
  31(9):
  United States .......................   5,008    5,196    5,125    4,976    4,903
  International........................   2,454    2,438    2,390    2,874    2,971
</TABLE>
 
- ---------------
 
(1) Includes the Company's share of equity affiliates.
 
(2) Includes crude oil, condensate, and NGLs expected to be removed for the
    Company's account from its natural gas production. Average Daily Production
    also includes NGLs acquired through gas plant ownership of 67, 69, 78, 80,
    and 79 Mbbls/day for 1993 through 1997, respectively.
 
(3) 6,000 cubic feet of natural gas = one barrel-of-oil-equivalent (BOE).
 
(4) Total Proved Reserves at December 31 divided by annual production for the
    year ended December 31, excluding NGLs from gas plant ownership.
 
(5) Finding and development costs per BOE represent a trailing five-year average
    for each year displayed.
 
(6) Excludes equity affiliates and processed NGLs.
 
(7) Based on capacity to process crude oil and condensate (excludes other
    feedstocks).
 
(8) Includes crude oil, condensate and other feedstocks.
 
(9) Represents outlets owned by the Company and others that sell the Company's
    refined products.
 
   
RECENT RESULTS
    
 
   
     Although the Company's results of operations for the third quarter of 1998
are not currently available, the following information reflects the Company's
expectations with respect to such results based on currently available
information. Conoco's third quarter results have been negatively affected by
market conditions that have affected the petroleum industry in general. The
Company's net realized prices in the third quarter of 1998 for crude oil and
natural gas are expected to be similar to net realized prices of $12.37 per
barrel of crude oil and $2.15 per thousand cubic feet of natural gas in the
second quarter of 1998. Third quarter prices for crude oil are expected to be
approximately 25 percent lower, and third quarter prices for natural gas are
expected to be approximately 10 percent lower, than prices in the third quarter
of 1997. Oil production in the third quarter of 1998 is expected to be similar
to production of 314,000 barrels per day in the second quarter of 1998 and
slightly lower than production in the third quarter of 1997. Natural gas
production for the third quarter of 1998 is expected to increase over production
of 1,326 million cubic feet per day in the second quarter of 1998 and over
production in the third quarter of 1997. The Company expects refining margins
per barrel for Downstream activities in the third quarter of 1998 to be slightly
higher than margins in the second quarter of 1998 but lower than margins in the
third quarter of 1997. Based on the cumulative effect of these factors, the
Company expects that Upstream and Downstream earnings before material
non-recurring items for the third quarter of 1998 will be comparable to the $200
million of such earnings for the second quarter of 1998 but will be lower than
the $252 million of such earnings for the third quarter of 1997. Additionally,
third quarter 1998 interest and debt expense will be significantly higher due to
additional debt of $7.5 billion owed to DuPont. Actual results may differ
materially from these third quarter estimates.
    
 
                                       14
<PAGE>   16
 
                              SUMMARY RESERVE DATA
 
     The following table sets forth summary information as of the dates
indicated with respect to the estimated proved reserves of oil and natural gas
of the Company at year-end for 1996 and 1997. Unless otherwise noted, all
information in this Prospectus relating to oil and natural gas reserves is based
upon estimates prepared by the Company and reflects the Company's net interest
after royalties. At the request of the Company, DeGolyer and MacNaughton,
independent petroleum engineering consultants, carried out an independent
evaluation of the reserves of selected properties representing approximately 80
percent in present value of the Company's reserves at December 31, 1997. The
results obtained by DeGolyer and MacNaughton with respect to reserves at
December 31, 1997 do not show significant differences from those reported by the
Company. DeGolyer and MacNaughton has delivered to the Company a summary letter
report describing its procedures and conclusions, a copy of which appears as
Annex A hereto. See "Risk Factors -- Uncertainty of Estimates of Proved
Reserves" and "Business -- Upstream -- Oil and Natural Gas Reserves."
 
   
<TABLE>
<CAPTION>
                                                              PROVED RESERVES
                                                              AT DECEMBER 31,
                                                              ----------------    % INCREASE
                                                               1996      1997     (DECREASE)
                                                              ------    ------    ----------
                                                               (NET AFTER ROYALTY BASIS)(1)
<S>                                                           <C>       <C>       <C>
United States:
  Oil (MMbbls)(2)...........................................    299       277         (7)
  Natural Gas (Bcf).........................................  2,155     2,605         21
                                                              -----     -----
  Total proved reserves (MMBOE)(3)..........................    658       711          8
International:
  Oil (MMbbls)(2)...........................................    674     1,347        100
  Natural Gas (Bcf).........................................  3,241     3,256         --
                                                              -----     -----
  Total proved reserves (MMBOE)(3)..........................  1,214     1,890         56
Worldwide:
  Total proved reserves (MMBOE)(3)..........................  1,872     2,601         39
                                                              =====     =====        ===
</TABLE>
    
 
- ---------------
 
(1) Includes the Company's share of equity affiliate reserves.
 
(2) Reserves comprise crude oil, condensate and NGLs expected to be removed for
    the Company's account from its natural gas production.
 
(3) 6,000 cubic feet of natural gas = one barrel-of-oil-equivalent (BOE).
 
                                       15
<PAGE>   17
 
                                  RISK FACTORS
 
     In evaluating the Company and its business, prospective investors should
consider carefully the following risk factors in addition to the other
information contained herein. This Prospectus contains forward-looking
statements that involve risks and uncertainties. Actual results may differ
materially from those expressed or implied by such forward-looking statements.
Factors that might cause such a difference include, but are not limited to,
those discussed in the following risk factors.
 
VOLATILITY OF OIL AND GAS PRICES; RECENT SUBSTANTIAL PRICE DECLINE
 
     The Company's profitability will be determined in large part by the
difference between the prices received for the natural gas, natural gas liquids,
crude oil and refined products produced by the Company and the costs of finding,
developing, producing, refining and marketing these resources. Prices for crude
oil, natural gas, and refined products are subject to wide fluctuation in
response to changes in global and regional supply over which the Company has no
control, including political developments and the ability of the Organization of
Petroleum Exporting Countries ("OPEC") and other producing nations to set and
maintain production levels and prices. Prices for crude oil, natural gas and
refined products are also affected by changes in demand for these products,
which may result from global events beyond the Company's control, as well as
supply and demand in industrial markets, such as the steel and aluminum markets.
Reduced Asian demand, as a result of the recent economic downturn in Asia, has
negatively affected crude oil and product prices elsewhere, including in the
Company's core markets. Even relatively modest declines in crude oil and natural
gas prices and refined product margins may adversely affect the Company's
financial condition, liquidity, and results of operations. A substantial decline
in crude oil prices occurred in late 1997 and is continuing in 1998. Recently,
West Texas Intermediate crude oil prices fell to 12-year lows as measured in
absolute dollars (and 25-year lows as measured in inflation-adjusted dollars),
closing at $11.58 a barrel on June 15, 1998. Lower oil and natural gas prices
may reduce the amount of oil and natural gas the Company can produce
economically, and existing contracts that the Company has entered into may
become uneconomical as a result of changing prices. From time to time, the
Company may attempt to mitigate the effect of price fluctuations by hedging
specific exposures, although there can be no assurance that these efforts will
be successful. See "Management's Discussion and Analysis of Financial Condition
and Results of Operations."
 
RISKS OF GLOBAL OPERATIONS
 
     Local political and economic factors in international markets over which
the Company has no control may have a material adverse effect on the Company's
financial condition and results of operations. Approximately 40 percent of the
Company's sales in 1997 were derived from markets outside the United States. The
Company conducts exploration and production operations in 18 countries including
the United States, Canada, the United Kingdom, Norway, Venezuela, the United
Arab Emirates, Indonesia, Russia and Nigeria. The Company has interests in
refineries located in the United Kingdom, Germany, the Czech Republic and
Malaysia, and conducts marketing and crude oil supply operations in foreign
countries, primarily in Europe and Southeast Asia. Risks associated with
operations in international markets also include changes in foreign governmental
policies, and other political, economic or diplomatic developments which are not
within the control of the Company, including changes in crude oil, natural gas
or refined product pricing policies, taxation policies, changing political
conditions and international monetary fluctuations. Recent turmoil in regions
such as Russia and Southeast Asia has subjected the Company's operations there
to increased risk of political and economic instability, the risks of war,
embargoes and expropriation and nationalization with or without compensation,
confiscatory taxation, renegotiation or nullification of existing concessions
and contracts, and increased risks of fluctuating currency values, hard currency
shortages and currency controls. Civil unrest and changes in government are also
potential hazards.
 
     The profitability of the Company's operations (both domestic and
international) is similarly exposed to risks due to actions of the United States
government through tax and other legislation, executive order and commercial
restrictions. Various agencies of the United States and other governments have
from time to time imposed restrictions on the Company's ability to operate in or
gain attractive opportunities in various
 
                                       16
<PAGE>   18
 
countries. Actions by both the United States and host governments have affected
operations significantly in the past and will continue to do so in the future.
 
   
     The Company is also exposed to fluctuations in foreign currency exchange
rates. The Company does not intend to comprehensively hedge its exposure to
currency rate changes, although it may choose to selectively hedge certain
working capital balances, firm commitments, cash returns from affiliates and/or
tax payments. There can be no assurance that these efforts will be successful.
    
 
CONTROL BY DUPONT; POTENTIAL CONFLICTS OF INTEREST
 
   
     After completion of the Offerings, DuPont will own 75.2 percent of the
Company's outstanding Common Stock and approximately 93.8 percent of the
combined voting power of all classes of voting stock of the Company. After the
Offerings, and prior to the divestiture of its ownership interest in the
Company, DuPont through its ability to elect the Board of Directors of the
Company, will be in a position to continue to control all matters affecting the
Company, including the composition of the Board of Directors and, through it,
any determination with respect to the direction and policies of the Company,
acquisition or disposition of assets, future issuances of Common Stock or other
securities of the Company, the Company's incurrence of debt, and any dividend
payable on the Common Stock. See "Principal Stockholder."
    
 
     Conflicts of interest may arise between the Company and DuPont in a number
of areas relating to their past and ongoing relationships including the nature,
quality and pricing of services rendered by the Company to DuPont or by DuPont
to the Company, potential competitive business activities, shared marketing
functions, tax and employee benefit matters, indemnity agreements, sales or
distributions by DuPont of all or any portion of its ownership interest in the
Company, or DuPont's ability to control the management and affairs of the
Company. The Company's Chairman of the Board, Edgar S. Woolard, Jr., its
President and Chief Executive Officer, Archie W. Dunham, and its director
nominee, William K. Reilly, currently serve, and will continue to serve after
the closing of the Offerings, as directors of DuPont. Gary M. Pfeiffer, a
director of the Company, is also an officer of DuPont. For purposes of governing
their on-going relationship, the Company and DuPont have or will enter into
various agreements involving the provision of services such as natural gas and
gas liquids supply, cash management and other financial services, purchasing,
legal, and computer services. It is the policy of Conoco and DuPont that such
services will generally be provided on terms and conditions comparable to those
granted to an unaffiliated third party for similar services. However, because
these agreements were negotiated in the context of a parent-subsidiary
relationship, there can be no assurance that these agreements, or the
transactions provided for therein, will be effected on terms at least as
favorable to the Company as could have been obtained from unaffiliated third
parties. There can be no assurance that DuPont and the Company will be able to
resolve any potential conflict or that, if resolved, the Company would not
receive more favorable resolution if it were dealing with an unaffiliated party.
See "Prospectus Summary -- Separation from DuPont" and "Arrangements Between the
Company and DuPont."
 
   
RISK OF REFINANCING DEBT OWED TO DUPONT
    
 
   
     Upon the occurrence of the intended split-off, mandatory prepayment
provisions will be triggered in the promissory notes (including the $7.5 billion
note, the revolving credit agreement and the Employee Benefit Note) representing
the debt owed by the Company to DuPont (the aggregate principal amount of which
immediately after the Offerings is expected to be $4,926 million). As a result,
the Company anticipates that it will be required to refinance debt owed to
DuPont within 12 months of the date hereof. There can be no assurance that the
Company will be able to refinance this debt on terms as favorable as those
existing with respect to the debt owed to DuPont.
    
 
UNCERTAINTY OF ESTIMATES OF PROVED RESERVES
 
     There are numerous uncertainties inherent in estimating quantities of
proved oil and natural gas reserves. The reserve data set forth in this
Prospectus represent estimates only. Reservoir engineering is an inherently
subjective and inexact process of estimating underground accumulations of oil
and natural gas that cannot be measured in an exact manner. Estimates of
economically recoverable oil and natural gas reserves and future
 
                                       17
<PAGE>   19
 
net cash flows are based on a number of variable factors and assumptions (some
or all of which may prove to be incorrect over time) related to reserve
performance that require evaluation by engineers interpreting the available
geologic, engineering and economic data, as well as price and other economic
factors, many of which may be beyond the control of the Company. The reliability
of these estimates depends on the quality and quantity of technical and economic
data, the production performance of the reservoirs and extensive engineering
judgment. Results of drilling, testing and production after the date of the
estimates may require substantial upward or downward revisions. Adverse changes
in economic conditions may render it uneconomical to produce certain reserves.
Actual production, revenues and expenditures with respect to the Company's
reserves will likely vary from estimates, and such variances may be material.
See "Business -- Upstream -- Oil and Natural Gas Reserves."
 
HIGHLY COMPETITIVE MARKET
 
     Each of the segments in which the Company operates is highly competitive.
The Company's competitors include major integrated petroleum companies, state
oil companies controlled by foreign governments, independent oil, natural gas,
pipeline, refining and marketing companies and alternative fuel producers, many
of which have larger financial and other resources than the Company.
 
     Upstream competes with numerous companies in the industry to find and
obtain new sources of supply, and to produce oil and gas in a cost-effective and
efficient manner. The Company also actively competes for reserve acquisitions,
exploration leases, licenses and concessions and skilled industry personnel.
Downstream competitive factors include product improvement and new product
development through research and technology, and efficient manufacturing and
distribution systems. In the marketing phase of the business, competitive
factors include site location, name recognition, customer loyalty, ease of
access, store management, product selection, pricing, hours of operation, store
safety, cleanliness, product promotions, product quality, customer programs,
customer service and marketing.
 
RESERVE REPLACEMENT; DRILLING RISKS
 
     The Company's ability to achieve its growth objectives is highly dependent
upon its level of success in finding, acquiring or gaining access to additional
reserves. In general, the volume of production from oil and natural gas
properties declines as reserves are depleted, with the rate of decline depending
on reservoir characteristics. Except to the extent the Company conducts
successful exploration and development activities or acquires properties
containing proved reserves, or both, the proved reserves of the Company will
decline as reserves are produced. The Company's exploration and development
activities expose it to inherent risks of drilling, including the risk that no
economically productive natural gas or oil reservoirs will be encountered. The
costs of drilling, completing and operating wells are often uncertain and
numerous factors beyond the Company's control may cause drilling operations to
be curtailed, delayed or cancelled. The Company's future drilling, exploration
and acquisition activities may not be successful and, if unsuccessful, such
failure would have an adverse effect on the Company's future results of
operations and financial condition.
 
OPERATING HAZARDS
 
     The Company's operations are subject to certain operating hazards such as
well blowouts, collapsed wells, explosions, uncontrolled flows of oil, natural
gas or well fluids, fires, formations with abnormal pressures, pipeline ruptures
or spills, refinery explosions, surface or marine transportation incidents,
pollution, releases of toxic gas and other environmental hazards and risks. In
addition, the Company conducts significant operations offshore, which are
subject to additional hazards of marine operations, such as capsizing, collision
and damage or loss from severe weather. All such hazards could result in loss of
human life, significant property and equipment damage, environmental pollution,
impairment of operations and substantial losses to the Company. Such hazards
have adversely affected the Company in the past, and litigation arising from a
catastrophic occurrence in the future at one of the Company's locations may
result in the Company being named as a defendant in lawsuits asserting
potentially large claims. In addition, the Company is exposed to risks inherent
in any business such as equipment failures, accidents, theft, strikes, protests
and sabotage that could disrupt or
 
                                       18
<PAGE>   20
 
interrupt operations. In accordance with customary industry practices, the
Company maintains insurance against some, but not all, such risks and losses.
See "Business -- Operating Hazards and Insurance."
 
ENVIRONMENTAL RISKS
 
     The Company incurs, and expects to continue to incur, substantial capital
and operating costs to comply with various federal, state, local and foreign
laws and regulations covering the discharge of material into the environment or
otherwise relating to clean-up or protection of the environment, including costs
to remediate certain contamination at various owned and previously owned
facilities, as well as third-party sites where the Company's products or wastes
have been handled or disposed. These regulatory requirements continue to
increase in both number and complexity and affect the Company's operations with
respect to, among other things: the discharge of pollutants into the
environment; the handling, use, storage, transportation, disposal and clean-up
of hazardous materials and hazardous and non-hazardous wastes; and the
dismantlement, abandonment, and restoration of oil and gas properties and
Company facilities at the end of their useful lives. The costs to comply with
complex environmental laws and regulations, as well as internal voluntary
programs, are significant. Estimated pre-tax environmental expenses charged to
current operations totaled about $136 million, before insurance recoveries, in
1997, as compared to approximately $162 million in 1996 and $129 million in
1995. These expenses include remediation accruals, operating maintenance and
depreciation costs for solid waste, air and water pollution control facilities
and the costs of certain other environmental activities. Capital expenditures
for environmental control facilities totaled approximately $50 million in 1997,
as compared to approximately $78 million in 1996 and $68 million in 1995. The
Company estimates that capital expenditures for pollution control facilities
will total approximately $51 million in 1998, and approximately $52 million in
1999. See "Management's Discussion and Analysis of Financial Condition and
Results of Operations -- Environmental Expenditures." There can be no assurance
that costs to comply with such requirements will not materially increase in the
future. In addition, the U.S. Environmental Protection Agency (the "EPA") and
other rulemaking bodies have from time to time changed minimum product
specifications in such a manner as to require the Company to make major
investments or incur significant additional operating expenses. Developments
such as the adoption of new laws and regulations, the imposition of more onerous
requirements in permits, increasingly strict enforcement of existing laws and
regulations or the discovery of previously unknown contamination may require
future expenditures to modify operations, install pollution control equipment,
perform site clean-ups or curtail Conoco's operations. There can be no assurance
that such future expenditures or curtailments will not have a material adverse
effect on the Company. See "Business -- Environmental Regulation," "Management's
Discussion and Analysis of Financial Condition and Results of
Operations -- Environmental Expenditures" and Note 25 to the Combined Financial
Statements.
 
GOVERNMENT REGULATION
 
     The Company's operations are subject to extensive government regulations
which are subject to change from time to time in response to economic or
political conditions. Matters subject to regulation include discharge permits
for drilling operations, reports concerning operations, the spacing of wells,
unitization and pooling of properties, gasoline formulation and taxation. From
time to time, regulatory agencies have imposed price controls and limitations on
production by restricting the rate of flow of oil and natural gas wells below
actual production capacity in order to conserve supplies of oil and natural gas.
Because legal requirements are frequently changed and subject to interpretation,
the Company is unable to predict the ultimate cost of compliance with these
requirements or their effect on operations.
 
RISK OF YEAR 2000 NONCOMPLIANCE
 
     Many existing computer programs were designed and developed without
considering the upcoming change in the century, which could lead to the failure
of computer applications or create erroneous results by or at the year 2000.
This issue is referred to as the "Year 2000 Issue." The Year 2000 Issue is a
broad business issue, whose impact extends beyond traditional computer hardware
and software to possible failure of automated plant systems and instrumentation,
as well as to business third parties. Also, there can be no guarantee that third
parties of business importance to Conoco will successfully reprogram or replace,
and test,
 
                                       19
<PAGE>   21
 
all of their own computer hardware, software and process control systems to
ensure such systems are Year 2000 compliant. Failure by the Company, third
parties of business importance to the Company and/or other constituents such as
governments to become Year 2000 compliant on a timely basis could have a
material adverse effect on the Company's financial position and results of
operations. See "Management's Discussion and Analysis of Financial Condition and
Results of Operations -- Year 2000."
 
ADVERSE EFFECT ON VALUE AND LIQUIDITY OF CLASS A COMMON STOCK FROM DISPARATE
VOTING RIGHTS OF CLASS A COMMON STOCK AND CLASS B COMMON STOCK
 
   
     The differential in the voting rights of the Class A Common Stock and Class
B Common Stock both prior to and following the intended split-off could
adversely affect the value of the Class A Common Stock to the extent that
investors or any potential future purchaser of the Company's Common Stock
ascribes value to the superior voting rights of the Class B Common Stock. The
existence of two separate classes of Common Stock could result in less liquidity
for either class of Common Stock than if there were only one class of Common
Stock. The holders of Class A Common Stock and Class B Common Stock generally
have identical rights except that (i) holders of Class A Common Stock are
entitled to one vote per share while holders of Class B Common Stock are
entitled to five votes per share on all matters to be voted on by stockholders
and (ii) holders of Class A Common Stock are not eligible to vote on any
alteration of the powers, preferences, or special rights of the Class B Common
Stock that would not adversely affect the holders of Class A Common Stock.
Holders of Class A Common Stock and Class B Common Stock are entitled to class
votes on amendments to the Certificate that would alter or adversely affect the
powers, preferences or special rights of the shares of their respective class.
See "Prospectus Summary -- Separation From DuPont" and "Description of Capital
Stock."
    
 
LIMITED OPERATING HISTORY; LIMITED RELEVANCE OF HISTORICAL FINANCIAL INFORMATION
 
     Since 1981, the Company's business operations have been conducted by
various entities owned directly or indirectly by DuPont, and the Company has had
no independent operating history. Following the Offerings, the Company will be
required to supplement its financial, administrative and other resources to
provide services necessary to operate successfully as an independent public
company. In addition, the financial information included herein may not
necessarily reflect the results of operations, financial position and cash flows
of the Company in the future or what the results of operations, financial
position and cash flows would have been had the Company been a separate,
stand-alone entity during the periods presented. The financial information
included herein does not reflect many significant changes that will occur in the
capital structure, funding and operations of the Company as a result of the
Separation and the Offerings. See "Arrangements Between the Company and DuPont,"
"Pro Forma Combined Financial Statements" including the discussion of the
assumptions reflected therein, and "Management's Discussion and Analysis of
Financial Condition and Results of Operations -- General."
 
CERTAIN ANTI-TAKEOVER PROVISIONS
 
     The Certificate of Incorporation of the Company (the "Certificate of
Incorporation"), the By-laws of the Company (the "By-laws"), the Rights and
applicable provisions of the Delaware General Corporation Law (the "DGCL")
contain various provisions that may inhibit the acquisition of control of the
Company without the approval of the Company's Board of Directors. Certain
provisions of the Certificate and the By-laws, among other things, classify the
Company's Board of Directors into three classes, each of which (after an initial
transition period) will serve for staggered three-year periods. The Company's
Board of Directors has the authority to issue shares of Preferred Stock in one
or more series and to fix the rights and preferences of the shares of any such
series without stockholder approval. Any series of Preferred Stock will be
senior to the Common Stock with respect to dividends, liquidation rights and,
possibly, voting. The ability to issue Preferred Stock could have the effect of
discouraging unsolicited acquisition proposals. In addition, the Board of
Directors plans to adopt a Rights Plan providing for the issuance of Rights,
which would cause substantial dilution to a person or group that attempts to
acquire the Company on terms not approved in advance by the Company's Board of
Directors. With certain exceptions, Section 203 of the DGCL imposes certain
restrictions
 
                                       20
<PAGE>   22
 
on mergers and other business combinations between the Company and any holder of
15 percent or more of the Common Stock. In addition, certain provisions of the
Certificate of Incorporation and By-laws (i) require advance notice for actions
to be taken at annual meetings and director nominations, (ii) require mergers
and certain other extraordinary corporate transactions in certain circumstances
to meet certain fair price criteria and (iii) depending on DuPont's level of
ownership, restrict the ability to remove directors without cause or for
stockholders to take action by written consent or call special meetings of
stockholders. See "Description of Capital Stock -- Anti-Takeover Effects of
Certain Certificate and By-Law Provisions."
 
ABSENCE OF PRIOR PUBLIC MARKET FOR CLASS A COMMON STOCK; POSSIBLE VOLATILITY OF
STOCK PRICE; NO ASSURANCE OF DIVIDENDS
 
     Prior to the Offerings, there has been no public market for the Class A
Common Stock. Although the Class A Common Stock has been approved for listing on
the NYSE, subject to official notice of issuance, there can be no assurance that
an active trading market will develop or continue upon completion of the
Offerings, or that purchasers of the Class A Common Stock will be able to resell
their Class A Common Stock at prices equal to or greater than the initial public
offering price. The initial public offering price of the Class A Common Stock
will be determined by negotiations among DuPont, the Company and the
representatives of the Underwriters and may not be indicative of either the
actual value of the Company or the market price of the Class A Common Stock
after the Offerings. The price at which the Class A Common Stock will trade in
the public market after the Offering may be less than the initial public
offering price. In addition, the market price of the Class A Common Stock could
be subject to significant fluctuations in response to a number of factors,
including variations in quarterly and yearly operating results, changes in crude
oil and natural gas prices, the success of the Company's business strategy,
competition, changes in government policies affecting the Company and market
conditions for energy or petroleum stocks in general. Moreover, stock markets
have recently experienced significant price and volume fluctuations unrelated or
disproportionate to the operating performance of affected companies.
 
     The determination of the amount of cash dividends, if any, to be declared
and paid will depend upon declaration by the Company's Board of Directors and
upon the Company's financial condition, results of operations, cash flow, the
level of its capital and exploration expenditures, its future business prospects
and such other matters that the Company's Board of Directors deems relevant.
There can be no assurance that any dividends will be declared or paid. See
"Dividend Policy."
 
ADVERSE EFFECT ON MARKET PRICE DUE TO SHARES ELIGIBLE FOR FUTURE SALE
 
   
     Sales, or the real or perceived possibility of sales, of a significant
number of shares of Common Stock in the public market following the Offerings
could adversely affect prevailing market prices for the Class A Common Stock.
Upon completion of the Offerings, DuPont will hold 100 percent of the
outstanding Class B Common Stock, representing 93.8 percent of the combined
voting power of all classes of voting stock of the Company. Following the
expiration of the 180 day lock-up period with respect to the Offerings, DuPont
may sell such shares subject to the requirements of the Securities Act. DuPont
has indicated its intention to divest its remaining ownership interest in the
Company in a tax-free split-off to be completed within 12 months of the date
hereof. See "Prospectus Summary -- Separation From DuPont." DuPont will have
rights to require the Company to register Common Stock held by DuPont for sale
in public offerings. See "Arrangements Between the Company and
DuPont -- Registration Rights Agreement." No predictions can be made as to the
effect, if any, that market sales of such shares, or the availability of such
shares for future sale, will have on the market price of the Class A Common
Stock. See "Shares Eligible for Future Sale" and "Underwriters."
    
   
    
 
                                       21
<PAGE>   23
 
                                USE OF PROCEEDS
 
   
     The estimated net proceeds from the sale of the Class A Common Stock
offered hereby, assuming an initial offering price of $22 per share, and after
deducting estimated offering expenses and the underwriting discounts and
commissions payable by the Company, are approximately $3,148 million (or
approximately $3,624 million if the U.S. Underwriters' over-allotment option is
exercised in full and the shares sold pursuant to the over-allotment option are
sold only by the Company). The Company will use the net proceeds of the
Offerings, plus a portion of its cash and cash equivalents, to repay or purchase
a portion of the indebtedness owed by certain subsidiaries of the Company to
DuPont under certain intercompany notes (the "Intercompany Notes"). The
Intercompany Notes will consist of (i) a promissory note in the principal amount
of $7.5 billion, due January 2, 2000, and bearing interest at a rate of 6.0125
percent per annum, (ii) a promissory note in the principal amount of
approximately $827 million, due January 2, 2000, and bearing interest at a rate
equal to the six-month LIBOR plus 0.375 percent per annum (or 5.965 percent per
annum in the current period) and (iii) several Norwegian Kroner denominated
promissory notes with an aggregate principal amount of approximately $447
million after conversion to U.S. dollars prior to the Offerings, having various
maturity dates (ranging from October 1998 to January 2000 and having a remaining
weighted average maturity of 11 months as of June 30, 1998), and bearing
interest at a rate equal to the six-month NIBOR plus 0.375 percent per annum (or
5.565 percent per annum in the current period).
    
 
   
     The net proceeds of the Offerings will be applied, first, to pay accrued
interest on the $7.5 billion promissory note and principal on such promissory
note to the extent necessary to reduce the principal amount to $4.846 billion;
second, to purchase the Kroner denominated notes described in clause (iii) of
the preceding paragraph; and, third, to repay, in whole or in part, the $827
million note referred to in clause (ii) of the preceding paragraph. To the
extent the net proceeds of the Offerings, together with the Company's cash and
cash equivalents in excess of $225 million (excluding $70 million of additional
monetary assets held by the Company's captive insurance company and its
subsidiaries) at the end of the month following completion of the Offerings, are
insufficient to repay or purchase in full the notes referred to in clauses (ii)
and (iii) of the preceding paragraph, the holders of such notes will contribute
the remaining balance of the notes to the Company. The $7.5 billion promissory
note was incurred in payment of a dividend in July 1998. The promissory note
with a principal amount of approximately $827 million was incurred to finance
the purchase by the Company of certain loans made by DuPont to the Company. The
purchased loans, as well as the several promissory notes with an aggregate
principal amount of approximately $447 million, were incurred to finance certain
capital expenditures, acquisitions and working capital.
    
 
   
     Following the application of the net proceeds from the Offerings and the
utilization of a portion of the Company's cash and cash equivalents in
connection with the matters discussed in "Arrangements Between the Company and
DuPont -- Intercompany Notes," the Company will have approximately $225 million
in cash and cash equivalents (excluding $70 million of additional monetary
assets held by the Company's captive insurance company and its subsidiaries).
    
 
                                DIVIDEND POLICY
 
   
     The Company currently intends to pay to its stockholders quarterly
dividends on the Class A Common Stock and Class B Common Stock. The first
dividend is expected to be paid in March 1999, representing a pro rata dividend
for the period from the date of the Offerings to December 31, 1998. There can be
no assurance, however, that this dividend, or any future dividend, will be
declared or paid.
    
 
     The determination of the amount of cash dividends (including the initial
quarterly dividend referred to above), if any, to be declared and paid will
depend upon declaration by the Company's Board of Directors and upon the
Company's financial condition, results of operations, cash flow, the level of
its capital and exploration expenditures, its future business prospects and such
other matters that the Company's Board of Directors deems relevant.
 
                                       22
<PAGE>   24
 
                                 CAPITALIZATION
 
   
     The following table sets forth the combined capitalization of the Company
as of June 30, 1998, pro forma to reflect the transactions related to the
Separation as of June 30, 1998, and pro forma as adjusted to reflect the
Offerings as of June 30, 1998, at an assumed public offering price of $22 per
share of Class A Common Stock and the application of the estimated net proceeds
as described herein under "Use of Proceeds."
    
 
   
<TABLE>
<CAPTION>
                                                                     AS OF JUNE 30, 1998
                                                           ---------------------------------------
                                                                                     PRO FORMA, AS
                                                           ACTUAL    PRO FORMA(1)     ADJUSTED(1)
                                                           -------   -------------   -------------
                                                              (IN MILLIONS, EXCEPT SHARE DATA)
<S>                                                        <C>       <C>             <C>
Short-term borrowings -- related parties(2).............   $ 1,087      $  272          $   --
Other short-term borrowings and capital lease
  obligations(2)........................................        51          51              51
Long-term borrowings -- related parties(2)..............   $ 1,181      $1,002          $   --
Long-term borrowings -- other related party(2)..........        --       7,500           4,926
Other long-term borrowings and capital lease
  obligations(2)........................................       103         103             103
Owner's Net Investment:
  Class A Common Stock, $0.01 par value; 3.0 billion
     shares authorized; 150 million shares issued and
     outstanding for pro forma, as adjusted(3)..........        --          --               2
  Class B Common Stock, $0.01 par value; 1.6 billion
     shares authorized; 455.5 million shares issued and
     outstanding for pro forma, as adjusted.............        --          --               5
  Additional paid-in capital............................        --          --           3,141
  Owner's net investment and accumulated other
     comprehensive loss/stockholders' equity............     8,223         272             697
                                                           -------      ------          ------
          Total capitalization..........................   $10,645      $9,200          $8,925
                                                           =======      ======          ======
</TABLE>
    
 
- ---------------
 
(1) See "Pro Forma Combined Financial Statements."
 
(2) For a description of the Company's borrowings, see Notes 3, 14, 16 and 28 to
    the Combined Financial Statements.
 
   
(3) Excludes shares of Class A Common Stock issuable upon exercise of options
    granted under the Company's employee compensation plans. See "Management."
    
   
    
 
                                       23
<PAGE>   25
 
            SELECTED HISTORICAL AND PRO FORMA FINANCIAL INFORMATION
 
     The following table sets forth selected combined historical and pro forma
financial data of the Company as of the dates and for the periods indicated. The
statement of income data for each of the years in the three-year period ended
December 31, 1997 and the historical balance sheet data as of December 31, 1996
and 1997 have been derived from the Combined Financial Statements audited by
PricewaterhouseCoopers LLP, independent accountants. The statement of income
data for the years ended December 31, 1993 and 1994 and the six months ended
June 30, 1997 and 1998 and the historical balance sheet data as of December 31,
1993, 1994, 1995 and June 30, 1998 are based on the accounting records of DuPont
which, in the opinion of the Company's management, include all adjustments
necessary for the fair presentation of the financial position at such dates and
the results of operations for such respective interim periods. The results for
the six months ended June 30, 1998, are not necessarily indicative of results to
be expected for the full fiscal year or any interim period. The financial
information included herein may not necessarily reflect the results of
operations, financial position and cash flows of the Company in the future or
what the results of operations, financial position and cash flows would have
been had the Company been a separate, stand-alone entity during the periods
presented.
 
     The pro forma financial data have been derived from the Pro Forma Combined
Financial Statements, which were prepared by the Company to illustrate the
estimated effects of the Offerings, the Separation and related transactions
described in the Notes to the Pro Forma Combined Financial Statements as if the
Offerings, the Separation and related transactions had occurred as of the
beginning of the periods presented, for purposes of the pro forma combined
statements of income and as of June 30, 1998 for purposes of the pro forma
combined balance sheet. In addition, the Pro Forma Combined Financial Statements
do not purport to represent what the results of operations or financial position
of the Company would actually have been if the Offerings, the Separation and
related transactions had in fact occurred on such dates or to project the
results of operations or financial position of the Company for any future period
or date. The following data should be read in conjunction with, and are
qualified by reference to, the Combined Financial Statements, the Interim
Combined Financial Statements, the Pro Forma Combined Financial Statements, and
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" included elsewhere in this Prospectus.
 
POST-OFFERINGS CHARGE
 
   
     Subject to completion of the Offerings, the Company and DuPont expect to
give certain current employees of the Company the option, subject to specific
country tax and legal requirements, to participate in the Option Program, which
involves the cancellation of all or part of their options to purchase DuPont
common stock or SARs with respect to DuPont common stock and the issuance by the
Company upon such cancellation of comparable options to acquire Class A Common
Stock or SARs with respect to Class A Common Stock. Participation in the Option
Program will be deemed a change in the terms of certain awards granted to Conoco
employees. As a result, the Company will incur a non-cash charge to compensation
expense, in the quarter the Offerings are completed, of approximately $100 to
200 million after-tax depending on the market price of DuPont common stock at
the time of the cancellation and issuance and the number of outstanding Conoco
employee options to purchase DuPont common stock canceled. Since the
cancellation and issuance would be a one-time event occurring after the
Offerings, the charge is not reflected in the Pro Forma financial information
included in this Prospectus. See "Management -- Treatment of Outstanding Stock
Options and Stock Appreciation Rights."
    
 
                                       24
<PAGE>   26
 
   
<TABLE>
<CAPTION>
                                                                                                    PRO FORMA        PRO FORMA
                                                                                                   AS ADJUSTED    AS ADJUSTED FOR
                                                                               SIX MONTHS ENDED    FOR THE YEAR   THE SIX MONTHS
                                         YEAR ENDED DECEMBER 31,                   JUNE 30,           ENDED            ENDED
                             -----------------------------------------------   -----------------   DECEMBER 31,      JUNE 30,
                              1993      1994      1995      1996      1997      1997      1998         1997            1998
                             -------   -------   -------   -------   -------   -------   -------   ------------   ---------------
                                            (IN MILLIONS, EXCEPT PER SHARE DATA)
<S>                          <C>       <C>       <C>       <C>       <C>       <C>       <C>       <C>            <C>
STATEMENT OF INCOME DATA:
Total Revenues(1)..........  $19,687   $19,433   $20,518   $24,416   $26,263   $12,600   $11,486     $26,179          $11,433
Cost of Goods Sold and
  Other Operating
  Expenses.................   11,349    10,640    11,146    14,560    16,226     7,667     6,754      16,226            6,754
Selling, General and
  Administrative
  Expenses.................      651       679       728       755       726       355       370         726              370
Exploration Expenses.......      361       357       331       404       457       192       176         457              176
Depreciation, Depletion and
  Amortization.............    1,428     1,244     1,067     1,085     1,179       516       505       1,179              505
Taxes Other Than on
  Income(1)................    4,652     5,477     5,823     5,637     5,532     2,669     2,896       5,532            2,896
Interest and Debt
  Expense..................       67        63        74        74        36        24         1         204               92
                             -------   -------   -------   -------   -------   -------   -------     -------          -------
Income Before Income
  Taxes....................    1,179       973     1,349     1,901     2,107     1,177       784       1,855              640
Provision for Income
  Taxes....................      424       551       774     1,038     1,010       590       254         928              218
                             -------   -------   -------   -------   -------   -------   -------     -------          -------
        Net Income(2)......  $   755   $   422   $   575   $   863   $ 1,097   $   587   $   530     $   927          $   422
                             =======   =======   =======   =======   =======   =======   =======     =======          =======
Segment Net Income:
Upstream...................  $   481   $   498   $   492   $   681   $   884   $   454   $   359
Downstream.................      324       241       233       289       307       181       181
Corporate and Other(2).....      (50)     (317)     (150)     (107)      (94)      (48)      (10)
                             -------   -------   -------   -------   -------   -------   -------
                             $   755   $   422   $   575   $   863   $ 1,097   $   587   $   530
                             =======   =======   =======   =======   =======   =======   =======
Pro Forma Earnings Per
  Share:
  Basic....................                                                                          $  1.53          $  0.70
  Diluted..................                                                                          $  1.52          $  0.69
Pro Forma Weighted Average
  Shares Outstanding:
  Basic....................                                                                              606              606
  Diluted..................                                                                              611              611
OTHER DATA:
Cash Provided by
  Operations...............    2,132     2,143     1,924     2,396     2,876       855       548
Capital Expenditures and
  Investments..............    1,743     1,665     1,837     1,944     3,114     1,815     1,050
</TABLE>
    
 
- ---------------
(1) Includes petroleum excise taxes of $4,478, $5,291, $5,655, $5,461 and $5,349
    for 1993 through 1997 and $2,577 and $2,806 for the first six months of 1997
    and 1998, respectively.
 
(2) Includes after-tax exchange gains (losses) of $60, $(143), $(40), $(7), and
    $21 for 1993 through 1997 and $5 for both the first six months of 1997 and
    1998, and $(25) for the pro forma as adjusted for 1997 and $(8) for the pro
    forma as adjusted for the first six months of 1998.
 
   
<TABLE>
<CAPTION>
                                                                                                                 PRO FORMA
                                                                       DECEMBER 31,                             AS ADJUSTED
                                                        ------------------------------------------   JUNE 30,    JUNE 30,
                                                         1993     1994     1995     1996     1997      1998        1998
                                                        ------   ------   ------   ------   ------   --------   -----------
                                                                                   (IN MILLIONS)
<S>                                                     <C>      <C>      <C>      <C>      <C>      <C>        <C>
BALANCE SHEET DATA:
Cash and Cash Equivalents.............................  $  271   $  319   $  286   $  846   $1,147    $  829      $  225
Working Capital.......................................   1,893    1,790      999      862      567       276         294
Net Property, Plant and Equipment.....................   9,473    9,522    9,758   10,082   10,828    11,048      11,048
Total Assets..........................................  14,809   15,271   14,229   15,226   17,062    17,164      15,420
Long-Term Borrowings -- Related Parties...............   2,102    2,279    2,141    2,287    1,450     1,181          --
Long-Term Borrowings -- Other Related Party...........      --       --       --       --       --        --       4,926
Other Long-Term Borrowings and Capital Lease
  Obligations.........................................     304      342       65      101      106       103         103
Owner's Net Investment and Accumulated Other
  Comprehensive Loss/Stockholders' Equity.............   7,462    7,274    6,754    6,579    7,896     8,223       3,845
</TABLE>
    
 
                                       25
<PAGE>   27
 
<TABLE>
<CAPTION>
                                 1993     1994     1995     1996     1997
                                ------   ------   ------   ------   ------
<S>                             <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>            <C>
OPERATING DATA:
Proved Reserves at December
  31(1):
  Oil (MMbbls)(2).............     983      988      977      973    1,624
  Natural Gas (Bcf)...........   3,971    4,674    5,048    5,396    5,861
  Total Proved Reserves
    (MMBOE)(3)................   1,645    1,767    1,818    1,872    2,601
International Proved Reserves
  (% of Total)................      58%      61%      63%      65%      73%
Reserve Replacement Ratio
  (1).........................      89%     157%     127%     126%     448%
Reserve Life (years)(1)(4)....     7.7      8.2      9.3      8.9     12.4
Finding and Development Costs
  per BOE (1)(3)(5)...........  $ 6.79   $ 6.24   $ 5.39   $ 4.84   $ 3.63
Average Daily Production(1):
  Oil (Mbbls/day)(2)..........     434      436      424      454      453
  Natural Gas (MMcf/day)......   1,301    1,327    1,126    1,211    1,203
  Total Production
    (MBOE/day)(3).............     651      657      612      656      654
Average Production Costs per
  BOE(3)(6)...................  $ 3.97   $ 3.59   $ 3.92   $ 3.84   $ 4.21
Refinery Capacity at December
  31 (Mbbls/day)(1)(7)........     595      602      621      743      754
Refinery Utilization(7).......      95%      99%      97%      83%      91%
Total Refinery Inputs
  (Mbbls/day)(1)(8)...........     674      697      721      732      780
Sales of Refined Products
  (Mbbls/day)(1)..............     876      931      983      998    1,048
Retail Marketing Outlets at
  December 31(9):
  United States ..............   5,008    5,196    5,125    4,976    4,903
  International...............   2,454    2,438    2,390    2,874    2,971
</TABLE>
 
- ---------------
(1) Includes the Company's share of equity affiliates.
 
(2) Includes crude oil, condensate, and NGLs expected to be removed for the
    Company's account from its natural gas production. Average Daily Production
    also includes NGLs acquired through gas plant ownership of 67, 69, 78, 80,
    and 79 Mbbls/day for 1993 through 1997, respectively.
 
(3) 6,000 cubic feet of natural gas = one barrel-of-oil-equivalent (BOE).
 
(4) Total Proved Reserves at December 31 divided by annual production for the
    year ended December 31 (excluding NGLs from gas plant ownership).
 
(5) Finding and development costs per BOE represent a trailing five-year average
    for each year displayed.
 
(6) Excludes equity affiliates and processed NGLs.
 
(7) Based on capacity to process crude oil and condensate (excludes other
    feedstocks).
 
(8) Includes crude oil, condensate and other feedstocks.
 
(9) Represents outlets owned by the Company and others that sell the Company's
    refined products.
 
                                       26
<PAGE>   28
 
                    PRO FORMA COMBINED FINANCIAL STATEMENTS
 
     The following unaudited Pro Forma Combined Financial Statements of the
Company for the year ended December 31, 1997, the six months ended June 30, 1997
and 1998, and as of June 30, 1998, were prepared by the Company to illustrate
the estimated effects of the Offerings, the Separation and related transactions
described in the Notes hereto as if they had occurred as of the beginning of the
period presented, for purposes of the pro forma combined statements of income,
and as of June 30, 1998, for purposes of the pro forma combined balance sheet.
Management believes that the assumptions used provide a reasonable basis for
presenting the significant effects directly attributable to the Offerings, the
Separation and related transactions. The Pro Forma Combined Financial Statements
do not purport to represent what the results of operations or financial position
of the Company would actually have been if the Offerings, the Separation and
related transactions had in fact occurred on such dates or to project the
results of operations or financial position of the Company for any future period
or date. These statements should be read in connection with, and are qualified
by reference to, the Combined Financial Statements, the Interim Combined
Financial Statements and "Management's Discussion and Analysis of Financial
Condition and Results of Operations," included elsewhere in this Prospectus.
 
                                       27
<PAGE>   29
 
   
                       REPORT OF INDEPENDENT ACCOUNTANTS
    
 
   
TO THE BOARD OF DIRECTORS AND SHAREHOLDERS OF
    
   
E. I. DU PONT DE NEMOURS AND COMPANY
    
 
   
     We have examined the pro forma and offering adjustments reflecting the
offering, separation and related transactions described in Note 1 and the
application of those adjustments to the historic amounts in the accompanying pro
forma combined statement of income of Conoco, the petroleum business of E. I. du
Pont de Nemours and Company, for the year ended December 31, 1997. The historic
combined statement of income for the year ended December 31, 1997 is derived
from the historical combined statement of income for the year ended December 31,
1997 of Conoco, which was audited by us, appearing elsewhere herein. Such pro
forma and offering adjustments are based upon management's assumptions as
described in Notes 1 and 2. Our examination was made in accordance with
standards established by the American Institute of Certified Public Accountants
and, accordingly, included such procedures as we considered necessary in the
circumstances.
    
 
   
     The objective of this pro forma financial information is to show what the
significant effects on the historical financial information might have been had
the offering, separation and related transactions occurred at an earlier date.
However, the pro forma combined statement of income is not necessarily
indicative of the results of operations that would have been attained had the
above-mentioned offering, separation and related transactions actually occurred
earlier.
    
 
   
     In our opinion, management's assumptions provide a reasonable basis for
presenting the significant effects directly attributable to the above-mentioned
offering, separation and related transactions described in Notes 1 and 2, the
related pro forma and offering adjustments give appropriate effect to those
assumptions, and the pro forma as adjusted column reflects the proper
application of those adjustments to the historic combined statement of income
amounts in the pro forma combined statement of income for the year ended
December 31, 1997.
    
 
   
PRICEWATERHOUSECOOPERS LLP
    
 
   
Houston, Texas
    
   
September 28, 1998
    
 
                                       28
<PAGE>   30
 
   
                  REVIEW REPORT OF INDEPENDENT ACCOUNTANTS ON
    
   
                    PRO FORMA COMBINED FINANCIAL INFORMATION
    
 
   
To the Board of Directors and Shareholders of
    
   
E. I. du Pont de Nemours and Company
    
 
   
     We have reviewed the pro forma and offering adjustments reflecting the
offering, separation and related transactions described in Note 1 and the
application of those adjustments to the historic amounts in the accompanying pro
forma combined balance sheet of Conoco, the petroleum business of E. I. du Pont
de Nemours and Company, as of June 30, 1998, and the pro forma combined
statements of income for the six-month periods ended June 30, 1997 and 1998. The
historic combined balance sheet as of June 30, 1998 and the historic combined
statements of income for the six-month periods ended June 30, 1997 and 1998 are
derived from the historical unaudited interim combined financial statements of
Conoco, which were reviewed by us, appearing elsewhere herein. Such pro forma
and offering adjustments are based on management's assumptions as described in
Notes 1 and 2. Our review was conducted in accordance with standards established
by the American Institute of Certified Public Accountants.
    
 
   
     A review is substantially less in scope than an examination, the objective
of which is the expression of an opinion on management's assumptions, the pro
forma adjustments and the application of those adjustments to historical
financial information. Accordingly, we do not express such an opinion.
    
 
   
     The objective of this pro forma financial information is to show what the
significant effects on the historical information might have been had the
offering, separation and related transactions occurred at an earlier date.
However, the pro forma combined financial statements are not necessarily
indicative of the results of operations or related effects on financial position
that would have been attained had the above-mentioned offering, separation and
related transactions actually occurred earlier.
    
 
   
     Based on our review, nothing came to our attention that caused us to
believe that management's assumptions do not provide a reasonable basis for
presenting the significant effects directly attributable to the above-mentioned
offering, separation and related transactions described in Notes 1 and 2, that
the related pro forma and offering adjustments do not give appropriate effect to
those assumptions, or that the pro forma as adjusted column does not reflect the
proper application of those adjustments to the historic financial statement
amounts in the pro forma combined balance sheet as of June 30, 1998, and the pro
forma combined statements of income for the six-month periods ended June 30,
1997 and 1998.
    
 
   
PRICEWATERHOUSECOOPERS LLP
    
 
   
Houston, Texas
    
   
September 28, 1998
    
 
                                       29
<PAGE>   31
 
                     PRO FORMA COMBINED STATEMENT OF INCOME
                          YEAR ENDED DECEMBER 31, 1997
                                  (UNAUDITED)
 
   
<TABLE>
<CAPTION>
                                                      PRO FORMA                 OFFERING       PRO FORMA
                                          HISTORIC   ADJUSTMENTS   PRO FORMA   ADJUSTMENTS    AS ADJUSTED
                                          --------   -----------   ---------   -----------    -----------
                                                       (IN MILLIONS, EXCEPT PER SHARE DATA)
<S>                                       <C>        <C>           <C>         <C>            <C>
Total Revenues..........................  $26,263       $ (11)(a)   $26,241     $    (62)(n)    $26,179
                                                          (11)(b)
Cost of Goods Sold and Other Operating
  Expenses..............................   16,226          --        16,226           --         16,226
Selling, General and Administrative
  Expenses..............................      726          --           726           --            726
Exploration Expenses....................      457          --           457           --            457
Depreciation, Depletion and
  Amortization..........................    1,179          --         1,179           --          1,179
Taxes Other Than on Income..............    5,532          --         5,532           --          5,532
Interest and Debt Expense...............       36         404(a)        440         (236)(o)        204
                                          -------       -----       -------     --------        -------
Income Before Income Taxes..............    2,107        (426)        1,681          174          1,855
Provision for Income Taxes..............    1,010        (123)(c)       887           41(o)         928
                                          -------       -----       -------     --------        -------
          Net Income....................  $ 1,097       $(303)      $   794     $    133        $   927
                                          =======       =====       =======     ========        =======
Pro Forma Earnings Per Share:
  Basic.................................                                                        $  1.53
  Diluted...............................                                                        $  1.52
Pro Forma Weighted Average Shares
  Outstanding:
  Basic.................................                                                            606
  Diluted...............................                                                            611
</TABLE>
    
 
              See Notes to Pro Forma Combined Financial Statements
 
                                       30
<PAGE>   32
 
                     PRO FORMA COMBINED STATEMENT OF INCOME
                         SIX MONTHS ENDED JUNE 30, 1997
                                  (UNAUDITED)
 
   
<TABLE>
<CAPTION>
                                                          PRO FORMA                 OFFERING      PRO FORMA
                                              HISTORIC   ADJUSTMENTS   PRO FORMA   ADJUSTMENTS   AS ADJUSTED
                                              --------   -----------   ---------   -----------   -----------
                                                           (IN MILLIONS, EXCEPT PER SHARE DATA)
<S>                                           <C>        <C>           <C>         <C>           <C>
Total Revenues..............................  $12,600       $  (6)(a)   $12,585       $ (60)(n)    $12,525
                                                               (9)(b)
Cost of Goods Sold and Other Operating
  Expenses..................................    7,667          --         7,667          --          7,667
Selling, General and Administrative
  Expenses..................................      355          --           355          --            355
Exploration Expenses........................      192          --           192          --            192
Depreciation, Depletion and Amortization....      516          --           516          --            516
Taxes Other Than on Income..................    2,669          --         2,669          --          2,669
Interest and Debt Expense...................       24         199(a)        223        (118)(o)        105
                                              -------       -----       -------       -----        -------
Income Before Income Taxes..................    1,177        (214)          963          58          1,021
Provision for Income Taxes..................      590         (62)(c)       528          11(o)         539
                                              -------       -----       -------       -----        -------
          Net Income........................  $   587       $(152)      $   435       $  47        $   482
                                              =======       =====       =======       =====        =======
Pro Forma Earnings Per Share:
  Basic.....................................                                                       $  0.80
  Diluted...................................                                                       $  0.79
Pro Forma Weighted Average Shares
  Outstanding:
  Basic.....................................                                                           606
  Diluted...................................                                                           611
</TABLE>
    
 
                     PRO FORMA COMBINED STATEMENT OF INCOME
                         SIX MONTHS ENDED JUNE 30, 1998
                                  (UNAUDITED)
 
   
<TABLE>
<CAPTION>
                                                          PRO FORMA                 OFFERING      PRO FORMA
                                              HISTORIC   ADJUSTMENTS   PRO FORMA   ADJUSTMENTS   AS ADJUSTED
                                              --------   -----------   ---------   -----------   -----------
                                                           (IN MILLIONS, EXCEPT PER SHARE DATA)
<S>                                           <C>        <C>           <C>         <C>           <C>
Total Revenues..............................  $11,486       $ (33)(a)   $11,453       $ (20)(n)    $11,433
Cost of Goods Sold and Other Operating
  Expenses..................................    6,754          --         6,754          --          6,754
Selling, General and Administrative
  Expenses..................................      370          --           370          --            370
Exploration Expenses........................      176          --           176          --            176
Depreciation, Depletion and Amortization....      505          --           505          --            505
Taxes Other Than on Income..................    2,896          --         2,896          --          2,896
Interest and Debt Expense...................        1         209(a)        210        (118)(o)         92
                                              -------       -----       -------       -----        -------
Income Before Income Taxes..................      784        (242)          542          98            640
Provision for Income Taxes..................      254         (58)(c)       196          22(o)         218
                                              -------       -----       -------       -----        -------
          Net Income........................  $   530       $(184)      $   346       $  76        $   422
                                              =======       =====       =======       =====        =======
Pro Forma Earnings Per Share:
  Basic.....................................                                                       $  0.70
  Diluted...................................                                                       $  0.69
Pro Forma Weighted Average Shares
  Outstanding:
  Basic.....................................                                                           606
  Diluted...................................                                                           611
</TABLE>
    
 
              See Notes to Pro Forma Combined Financial Statements
                                       31
<PAGE>   33
 
                        PRO FORMA COMBINED BALANCE SHEET
                                 JUNE 30, 1998
                                  (UNAUDITED)
 
                                     ASSETS
 
   
<TABLE>
<CAPTION>
                                                                                                    PRO FORMA
                                                           PRO FORMA                  OFFERING         AS
                                               HISTORIC   ADJUSTMENTS    PRO FORMA   ADJUSTMENTS    ADJUSTED
                                               --------   -----------    ---------   -----------    ---------
                                                                       (IN MILLIONS)
<S>                                            <C>        <C>            <C>         <C>            <C>
Cash and Cash Equivalents....................  $   829      $  (439)(d)   $   123      $ 3,148(i)    $   225
                                                               (267)(e)                 (3,148)(j)
                                                                                           102(m)
Marketable Securities........................        7           --             7           --             7
Accounts and Notes Receivable................    1,252           --         1,252           --         1,252
Notes Receivable -- Related Parties..........      465          612(d)        377         (102)(m)        --
                                                               (700)(h)                   (275)(m)
Inventories..................................      981                        981           --           981
Prepaid Expenses.............................      305           --           305           --           305
                                               -------      -------       -------      -------       -------
         Total Current Assets................    3,839         (794)        3,045         (275)        2,770
Net Property, Plant and Equipment............   11,048           --        11,048           --        11,048
Investment in Affiliates.....................    1,141           --         1,141           --         1,141
Long-Term Notes Receivable -- Related
  Parties....................................      612         (612)(d)        --           --            --
Other Assets.................................      524          (63)(d)       461           --           461
                                               -------      -------       -------      -------       -------
         Total Assets........................  $17,164      $(1,469)      $15,695      $  (275)      $15,420
                                               =======      =======       =======      =======       =======
                                   LIABILITIES AND OWNER'S NET INVESTMENT
 
Accounts Payable.............................  $ 1,129      $    --       $ 1,129      $    --       $ 1,129
Short-Term Borrowings -- Related Parties.....    1,087         (815)(d)       272         (272)(j)        --
Other Short-Term Borrowings and Capital Lease
  Obligations................................       51           --            51           --            51
Income Taxes.................................      253           --           253           --           253
Other Accrued Liabilities....................    1,043           --         1,043           --         1,043
                                               -------      -------       -------      -------       -------
         Total Current Liabilities...........    3,563         (815)        2,748         (272)        2,476
                                               -------      -------       -------      -------       -------
Long-Term Borrowings -- Related Parties......    1,181         (179)(d)     1,002         (222)(j)        --
                                                                                          (780)(l)
Long-Term Borrowings -- Other Related
  Party......................................       --        7,500(g)      7,500       (2,654)(j)     4,926
                                                                                            80(k)
Other Long-Term Borrowings and Capital Lease
  Obligations................................      103           --           103           --           103
Deferred Income Taxes........................    1,861          (24)(f)     1,837           --         1,837
Other Liabilities and Deferred Credits.......    1,925           --         1,925           --         1,925
                                               -------      -------       -------      -------       -------
         Total Liabilities...................    8,633        6,482        15,115       (3,848)       11,267
                                               -------      -------       -------      -------       -------
Minority Interests...........................      308           --           308           --           308
Owner's Net Investment and Accumulated Other
  Comprehensive Loss/Stockholders' Equity....    8,223       (7,500)(g)       272        3,148(i)      3,845
                                                               (267)(e)                    (80)(k)
                                                                 24(f)                     780(l)
                                                                492(d)                    (275)(m)
                                                               (700)(h)
                                               -------      -------       -------      -------       -------
         Total Liabilities and Owner's Net
           Investment/Stockholders' Equity...  $17,164      $(1,469)      $15,695      $  (275)      $15,420
                                               =======      =======       =======      =======       =======
</TABLE>
    
 
              See Notes to Pro Forma Combined Financial Statements
                                       32
<PAGE>   34
 
                NOTES TO PRO FORMA COMBINED FINANCIAL STATEMENTS
                             (DOLLARS IN MILLIONS)
 
(1) BASIS OF PRESENTATION
 
     The unaudited pro forma combined statements of income of the Company for
the year ended December 31, 1997, and the six months ended June 30, 1997 and
1998, and the unaudited pro forma combined balance sheet as of June 30, 1998
(collectively "the Pro Forma Combined Financial Statements") have been prepared
from the Combined Financial Statements and Interim Combined Financial Statements
presented elsewhere in this Prospectus. The Pro Forma Combined Financial
Statements are based on numerous assumptions and include the adjustments
explained in Note 2 below. The unaudited pro forma combined statements of income
have been prepared as if the Offerings, Separation and related transactions
described in the following paragraph had occurred as of the beginning of the
period presented. The unaudited pro forma combined balance sheet has been
prepared as if the Offerings, Separation and related transactions described in
the following paragraph had occurred as of June 30, 1998.
 
   
     In July 1998, a dividend of $7,500 was declared and paid in the form of a
promissory note by the Company to all shareholders of record as of July 20,
1998. On September 28, 1998, the Company declared a dividend of a receivable
from DuPont evidenced by a promissory note in the amount of $700 million. Prior
to or concurrently with the consummation of the Offerings the following
transactions will have occurred as provided for in the Separation Agreement: (a)
to structure the Company on a stand-alone basis, certain subsidiaries and assets
and liabilities will be transferred between DuPont and Conoco; (b) intercompany
loans in existence prior to the Offerings will be settled to the extent
specified; (c) the Company will deliver a promissory note to DuPont as
settlement for DuPont stock options held by Conoco employees and other employee
benefits related liabilities; (d) the Company will use the net proceeds of the
Offerings to repay a portion of the Long-Term Borrowings -- Other Related Party;
and (e) DuPont and Conoco will enter into certain agreements with respect to
employee benefit arrangements, information management, the provision of interim
services, financing arrangements, tax sharing, environmental liabilities and
various commercial arrangements. The transactions described above, excluding the
Offerings, are referred to herein collectively as the "Transactions." See
"Arrangements between the Company and DuPont."
    
 
     The Pro Forma Combined Financial Statements do not purport to represent
what the results of operations or financial position of the Company would
actually have been if the Offerings and Transactions had in fact occurred on
such dates or to project the results of operations or financial position of the
Company for any future date or period. These statements should be read in
conjunction with, and are qualified by reference to, the Combined Financial
Statements, the Interim Combined Financial Statements and "Management's
Discussion and Analysis of Financial Condition and Results of Operations"
included elsewhere in this Prospectus.
 
   
     The pro forma adjustments are based upon currently available information
and contain certain estimates and assumptions. Should DuPont's ownership
interest fall below 50 percent, pro forma Selling, General and Administrative
expenses and guarantee and letter of credit fees would increase by approximately
$15 to $20 on a full year basis. In addition, certain changes are scheduled to
be made in services historically provided to DuPont by the Company. These
changes primarily include ceasing to provide insurance coverage to DuPont which
historically has been provided through a Company-owned captive insurance company
and entering into new contractual commitments related to fees charged by Conoco
for services provided to DuPont such as research and development and securing
supplies of natural gas for various DuPont facilities. The effect of these
scheduled changes are not expected to be material to the Company's results of
operations and are not reflected in the Pro Forma Combined Financial Statements.
    
 
     Certain international assets relating primarily to the business of DuPont
may be held by the Company or its subsidiaries at the closing of the Offerings
pending receipt of consents or other approval or satisfaction of other
applicable foreign requirements necessary for the transfer of such assets to
DuPont. In addition, certain international assets relating primarily to the
business of the Company may be held by DuPont or other of its subsidiaries at
the closing of the Offerings pending receipt of consents or approvals or
satisfaction of other
 
                                       33
<PAGE>   35
 
   
        NOTES TO PRO FORMA COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
    
   
                             (DOLLARS IN MILLIONS)
    
 
   
applicable foreign requirements necessary for the transfer of such assets to the
Company. The financial and other information included herein assumes the
consummation of all such transactions. Additionally, such information reflects
the inclusion of certain subsidiaries of DuPont which will not be owned by the
Company as of the closing of the Offerings, and which DuPont will not thereafter
be obligated to transfer to the Company. DuPont and the Company intend to
negotiate for the sale of such subsidiaries within the six months following the
Offerings at a purchase price equal to their then fair market value. DuPont and
the Company estimate that the fair market value of such subsidiaries at August
1998 was approximately $20 and cannot predict at what price any such sale may
occur. All of the above subsidiaries, which are immaterial to total assets and
results of operations of the Company, have been included in the Combined
Financial Statements.
    
 
   
     Subject to completion of the Offerings, the Company and DuPont expect to
give certain current employees of the Company the option, subject to specific
country tax and legal requirements, to participate in the Option Program, which
involves the cancellation of all or part of their options to purchase DuPont
common stock or SARs with respect to DuPont common stock and the issuance by the
Company upon such cancellation of comparable Class A Common Stock options, or
SARs with respect to Class A Common Stock. Participation in the Option Program
will be deemed a change in the terms of certain awards granted to Conoco
employees. As a result, the Company will incur a non-cash charge to compensation
expense, in the quarter the Offerings are completed, of approximately $100 to
200 after-tax, depending on the market price of DuPont common stock at the time
of the cancellation and issuance and the number of outstanding Conoco employee
options to purchase DuPont common stock canceled. Since the cancellation and
issuance would be a one-time event occurring after the Offerings, the charge is
not reflected in the Pro Forma Combined Financial Statements. See
"Management -- Treatment of Outstanding Stock Options and Stock Appreciation
Rights."
    
 
   
     The Company estimates that approximately 65 percent of all outstanding
DuPont stock options and SARs held by Conoco employees will be voluntarily
canceled in the Option Program. See "Prospectus Summary -- Separation From
DuPont."
    
 
   
     Management believes the estimates and assumptions provide a reasonable
basis for presenting the significant effects of the Offerings and Transactions
as contemplated in the Separation Agreement, and that the pro forma adjustments
give appropriate effect to these estimates and assumptions and are properly
applied in the Pro Forma Combined Financial Statements.
    
 
(2) PRO FORMA ADJUSTMENTS
 
  Unaudited Pro Forma Combined Statements of Income
 
   
     (a) Reflects a decrease in interest income due to settlement of Notes
Receivable -- Related Parties and incremental interest expense resulting from
the Company's new debt structure. The incremental interest expense was
calculated by multiplying the Long-Term Borrowings -- Related Parties ($1,002),
and Short-Term Borrowings -- Related Parties ($272) and the new Long-Term
Borrowings -- Other Related Party ($7,500) by an annual interest rate of 6.0125
percent on those borrowings and subtracting the historical related party
interest cost of $124 for 1997, and $65 and $55 for the six months ended June
30, 1997 and 1998, respectively. The historical related party interest cost is
net of capitalized interest of $94, $44 and $57, for these periods,
respectively.
    
 
   
<TABLE>
<CAPTION>
                                                DECEMBER 31, 1997   JUNE 30, 1997   JUNE 30, 1998
                                                -----------------   -------------   -------------
<S>                                             <C>                 <C>             <C>
Decrease to Interest Income...................        (11)               (6)            (33)
Increase to Interest and Debt Expense.........         404               199             209
</TABLE>
    
 
   
     (b) Reflects the impact of changes in currency exchange rates on certain
intercompany loans denominated in foreign currencies purchased by the Company
from DuPont as part of the restructuring and settlement of notes prior to the
Offerings provided for in the Separation Agreement. These loans are to
    
 
                                       34
<PAGE>   36
 
   
        NOTES TO PRO FORMA COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
    
   
                  (DOLLARS IN MILLIONS EXCEPT PER SHARE DATA)
    
 
Western European petroleum operations for which the local currency has been
designated as the functional currency.
 
   
     (c) Reflects the impact of the Pro Forma Adjustments (primarily increased
interest expense resulting from the Company's new debt structure) and a separate
return income tax calculation method on the Provision for Income Taxes. The
historic tax provision was calculated on a loss benefit method (See Note 2 to
the Combined Financial Statements). In accordance with SEC Staff Accounting
Bulletin No. 55, the Pro Forma Provision for Income Taxes is calculated using a
separate return method. The Pro Forma Combined Statements of Income for the year
ended December 31, 1997 and for the six months ended June 30, 1997 and June 30,
1998 reflect a reduction in the Pro Forma Provision for Income Taxes of
approximately $8, $0 and $0, respectively, due to the change to the separate
return method of presentation. The reduction in Pro Forma Provision for Income
Taxes is primarily attributable to the utilization of additional foreign tax
credits against the provision for U.S. taxes, offset by a reduction in tax
benefits resulting from the transfer of international exploration subsidiaries
from the original tax jurisdiction to another tax jurisdiction. See also
"Arrangements Between the Company and DuPont -- Tax Sharing Agreement" and
"Management's Discussion and Analysis of Financial Condition and Results of
Operations -- Tax Matters."
    
 
  Unaudited Pro Forma Combined Balance Sheet as of June 30, 1998
 
   
     (d) Reflects the settlement, and transactions necessary for settlement, of
intercompany notes in existence prior to the Offerings as provided for in the
Separation Agreement.
    
 
   
     (e) The Company will use a portion of its cash ($247) to acquire certain
subsidiaries from DuPont and to refund prepaid insurance premiums to DuPont.
Additionally, an estimated $20 will be available to acquire certain other assets
from DuPont subsequent to the Offerings if such transactions take place. As
these assets are held under common control, they are accounted for at their
historical book value. As a result, their acquisition or potential future
acquisition at estimated fair value has been reflected as a charge to Owner's
Net Investment. Any deferred tax assets related to these acquisitions or
potential future acquisitions have been fully reserved.
    
 
   
     (f) The pro forma separate return tax calculation reflects a reduction in
deferred tax liabilities of $24 principally resulting from the transfer of
international production subsidiaries from the original tax jurisdiction to
another tax jurisdiction.
    
 
   
     (g) Reflects that in July 1998, a dividend of $7,500 was declared and paid
by the Company in the form of a promissory note, to all shareholders of record
as of July 20, 1998. The Promissory Note is due January 2, 2000 and bears
interest at an annual interest rate of 6.0125 percent.
    
 
   
     (h) Reflects a dividend in September 1998 by the Company to DuPont of $700
of the balance in Notes Receivable -- Related Parties.
    
 
  Offering Adjustments
 
   
     (i) Represents the receipt by Conoco of $3,148 in proceeds from the
Offerings (consisting of the assumed sale of 150 million shares at $22 per
share), net of underwriting discounts of $132 and estimated expenses of the
Offerings of $20.
    
 
   
     (j) Represents the use of net proceeds to repay a portion of the
indebtedness between the companies as described in "Use of Proceeds."
    
 
   
     (k) The Separation Agreement provides that a subsidiary of the Company will
issue a promissory note to DuPont in an amount equal to the sum of: (i) an
agreed level of future appreciation of DuPont stock options or SARs held by
active Conoco employees who do not participate in the Option Program; (ii) an
amount calculated to result in an approximately equal sharing between the
Company and DuPont of the after-tax cost that would result from an assumed
exercise of all DuPont stock options and SARs held by active Conoco employees
outstanding immediately prior to the Offerings (including those to be cancelled
upon issuance of
    
 
                                       35
<PAGE>   37
 
   
        NOTES TO PRO FORMA COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
    
   
                             (DOLLARS IN MILLIONS)
    
 
   
Company stock options and SARs), based on the appreciated value of the options
at the time of the Offerings; and (iii) $10.4 in consideration for other
employee benefits related liabilities assumed by DuPont for employees
transferring between the two companies. This note will be non-interest bearing
with a due date of January 2, 2000 and have a principal amount determined in
accordance with the Separation Agreement. Assuming an estimate of the value at
the date of the Offerings and that 65% of all outstanding DuPont stock options
and SARs are voluntarily cancelled in the Option Program, the principal amount
is projected to be $80. If the principal amount determined in accordance with
the Separation Agreement is negative, DuPont will instead make a corresponding
cash payment to the Company.
    
 
   
     (l) Represents the capital contribution by DuPont of the remaining balance
in Long-Term Borrowings -- Related Parties.
    
 
   
     (m) Reflects the collection of a portion of the remaining balance in Notes
Receivable -- Related Parties to increase cash to $225 and forgiveness of the
remaining balance.
    
 
   
     (n) Reflects the impact of changes in currency exchange rates on certain
intercompany loans denominated in foreign currencies purchased by the Company
from DuPont after the Offerings. These loans are to Western European petroleum
operations for which the local currency has been designated as the functional
currency.
    
 
   
     (o) Represents the reduction of interest expense and the associated
increase in income taxes resulting from the payment to DuPont of the borrowings
described in (j) above as well as the capital contribution described in (l)
above, and the tax impact of the adjustment described in (n) above.
    
 
(3) EARNINGS PER SHARE
 
   
     Unaudited pro forma basic earnings per share includes both the Class A and
the Class B common shares deemed to be outstanding as of the date of the
Offerings. Pro forma diluted earnings per share includes the dilutive effect of
the 5.8 million shares of Conoco Common Stock issuable upon exercise of Company
stock options, after applying the treasury stock method, which are expected to
be issued in the Option Program upon cancellation of outstanding DuPont stock
options, using the anticipated weighted-average exercise price of the
outstanding options and the anticipated price per share of the Offerings. In
accordance with SEC Staff Accounting Bulletin No. 98, pro forma basic and
diluted earnings per share have been presented for the most recent annual and
subsequent interim periods only.
    
 
                                       36
<PAGE>   38
 
               MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
                      CONDITION AND RESULTS OF OPERATIONS
 
GENERAL
 
     The following section contains forward-looking statements including,
without limitation, statements relating to the Company's plans, strategies,
objectives, expectations, intentions and resources. See "Disclosure Regarding
Forward-Looking Information" and "Risk Factors." The Company does not undertake
to update, revise or correct any of the forward-looking information.
 
     The discussion and analysis of the Company's financial condition and
results of operations should be read in conjunction with the Combined Financial
Statements of the Company, the unaudited Supplemental Information to the
Combined Financial Statements, the unaudited Interim Combined Financial
Statements of the Company and the notes to each of these appearing elsewhere in
this Prospectus.
 
     Since 1981, the Company's business operations have been conducted by
various entities, owned directly or indirectly, by DuPont. In conjunction with
the Offerings, certain businesses are being realigned so these operations can be
conducted as wholly owned subsidiaries of Conoco. The Combined Financial
Statements are presented on a "carve out" basis and include the historical
operations of the entities owned by Conoco and operations to be transferred to
Conoco by DuPont. In this context, no direct ownership relationship existed
among all the various units comprising Conoco; accordingly, DuPont and its
subsidiaries' net investment in Conoco ("Owner's Net Investment") is shown in
lieu of Stockholders' Equity in the Combined Financial Statements. The Combined
Financial Statements included herein have been prepared from DuPont's historical
accounting records.
 
     The Combined Statement of Income includes all revenues and costs directly
attributable to Conoco, including costs for facilities, functions and services
used by Conoco at shared sites and costs for certain functions and services
performed by centralized DuPont organizations and directly charged to Conoco
based on usage. In addition, services performed by Conoco on DuPont's behalf are
reflected in the accompanying Combined Financial Statements. The results of
operations also include allocations of (i) costs for administrative functions
and services performed on behalf of Conoco by centralized staff groups within
DuPont and (ii) DuPont's general corporate expenses.
 
     All charges and allocations of costs for facilities, functions and services
performed by DuPont organizations for Conoco have been deemed to have been paid
by Conoco to DuPont, in cash, in the period in which the costs were recorded in
the Combined Financial Statements. Allocations of current income taxes
receivable or payable are deemed to have been remitted, in cash, by or to DuPont
in the period the related income taxes were recorded.
 
     All of the allocations and estimates in the Combined Financial Statements
are based on assumptions management believes are reasonable under the
circumstances. However, these allocations and estimates are not necessarily
indicative of the costs and expenses that would have resulted if Conoco had
operated as a separate entity.
 
     Business operations are grouped into three segments: Upstream, Downstream
and Corporate and Other. The Upstream segment explores for, develops, produces
and sells crude oil, natural gas and natural gas liquids. The Downstream segment
refines crude oil and other feedstocks into petroleum products, buys and sells
crude oil and refined products, and transports, distributes and markets
petroleum products. Corporate and Other includes general corporate expenses,
financing costs and other non-operating items and results for electric power and
related-party insurance operations.
 
     The Company considers portfolio optimization to be an ongoing business
strategy and continuously seeks to rationalize its investment portfolio in order
to maximize profitability. Over the past five years the Company has generated
proceeds of approximately $1.7 billion, averaging about $340 million a year
through the disposal of marginal and nonstrategic producing properties, by
upgrading and redirecting its exploration portfolio and by increasing its
ownership in larger scale properties. As a result, the Company has maintained
production essentially constant on a BOE basis while undergoing this
rationalization. The Company's policy is to report
                                       37
<PAGE>   39
 
material gains and losses from individual asset sales as non-recurring items
when reporting Combined Net Income.
 
     The Company's revenue and profitability are largely determined by the
difference between prices received for crude oil, natural gas, natural gas
liquids and refined products produced and the costs of finding, developing, and
producing those resources. The Company conducts its activities through wholly
and majority owned subsidiaries and, increasingly, through equity affiliates.
This trend of conducting business in the petroleum industry through equity
affiliates is expected to increase in the future as the Company attempts to
minimize either the capital or political risks associated with new large scale,
high impact projects. In addition, the Company conducts its Upstream and
Downstream activities in 40 countries worldwide and is subject to various tax
rates, some significantly higher than U.S. rates, which can result in
variability in revenues and profitability. Other potential sources of
variability in the Company's revenues are crude oil and refined product buy/sell
contracts and natural gas and electric power resale activities.
 
     Buy/sell contracts are the marketing of crude oil or refined products,
which are produced or refined by other companies and purchased by the Company
for resale. The vast majority of crude oil buy/sell contracts are geared at
repositioning purchased crude oil for supplying the Company's refineries and
optimizing its transportation assets. The Company also engages in some buy/sell
crude oil contracts in pursuit of trading profit opportunities. Each side of the
contract, i.e., the buy side and the sell side, is accounted for and settled
independently of the other. Although differentials (reflecting differences in
quality or location) between the sales revenue and the cost are relatively
immaterial, the gross amounts reported for both revenue and cost are material.
 
     A substantial decline in crude oil prices began in late 1997 and is
continuing in 1998, with crude oil prices currently at their lowest level in
over a decade. These lower prices had a significant negative impact on the
Company's results in the first half of 1998 and are expected to continue to
negatively impact 1998 financial results.
 
   
     Subject to completion of the Offerings, the Company and DuPont expect to
give certain current employees of the Company the option, subject to specific
country tax and legal requirements, to participate in the Option Program, which
involves the cancellation of all or part of their options to purchase DuPont
common stock or SARs with respect to DuPont common stock and the issuance by the
Company upon such cancellation of comparable options to acquire Class A Common
Stock or SARs with respect to Class A Common Stock. Participation in the Option
Program will be deemed a change in the terms of certain awards granted to Conoco
employees. As a result, the Company will incur a non-cash charge to compensation
expense in the quarter the Offerings are completed of approximately $100 to 200
million after-tax depending on the market price of DuPont common stock at the
time of the cancellation and issuance and the number of outstanding Conoco
employee options to purchase DuPont common stock or SARs canceled. Since the
cancellation and issuance would be a one-time event, occurring after the
Offerings, the charge is not reflected in the Pro Forma financial information
included in this Prospectus. See "Management -- Treatment of Outstanding Stock
Options and Stock Appreciation Rights."
    
 
                                       38
<PAGE>   40
 
RESULTS OF OPERATIONS
 
     COMBINED RESULTS
 
     A summary of the Company's Sales and Other Operating Revenues and Combined
Net Income, by business segment, is as follows:
 
   
<TABLE>
<CAPTION>
                                                                             SIX MONTHS ENDED
                                                 YEAR ENDED DECEMBER 31,         JUNE 30,
                                               ---------------------------   -----------------
                                                1995      1996      1997      1997      1998
                                               -------   -------   -------   -------   -------
                                                                (IN MILLIONS)
<S>                                            <C>       <C>       <C>       <C>       <C>
SALES AND OTHER OPERATING REVENUES
Upstream.....................................  $ 3,270   $ 4,726   $ 5,254   $ 2,679   $ 2,475
Downstream...................................   17,038    19,425    20,033     9,649     8,534
Corporate and Other..........................       20        79       509       147       339
                                               -------   -------   -------   -------   -------
     Total Sales and Other Operating
       Revenues..............................  $20,328   $24,230   $25,796   $12,475   $11,348
                                               =======   =======   =======   =======   =======
 
COMBINED NET INCOME
Upstream
  United States..............................  $   258   $   314   $   445   $   241   $   144
  International..............................      234       367       439       213       215
                                               -------   -------   -------   -------   -------
     Total Upstream..........................  $   492   $   681   $   884   $   454   $   359
Downstream
  United States..............................  $   112   $   172   $   216   $   130   $    86
  International..............................      121       117        91        51        95
                                               -------   -------   -------   -------   -------
     Total Downstream........................  $   233   $   289   $   307   $   181   $   181
Corporate and Other..........................     (150)     (107)      (94)      (48)      (10)
                                               -------   -------   -------   -------   -------
     Combined Net Income.....................  $   575   $   863   $ 1,097   $   587   $   530
                                               =======   =======   =======   =======   =======
</TABLE>
    
 
   
     SPECIAL ITEMS
    
 
   
     Combined net income includes the following material non-recurring items
("Special Items") on an after-tax basis:
    
 
   
<TABLE>
<CAPTION>
                                                                             SIX MONTHS
                                                YEAR ENDED DECEMBER 31,    ENDED JUNE 30,
                                                -----------------------    --------------
                                                1995     1996     1997     1997     1998
                                                -----    -----    -----    -----    -----
                                                              (IN MILLIONS)
<S>                                             <C>      <C>      <C>      <C>      <C>
Asset sales..................................   $ --     $ 35     $240     $ 24      $54
Property impairments.........................    (45)     (63)    (167)      --       --
Tax rate changes.............................     --       --       30       --       --
Environmental insurance litigation
  recoveries.................................     --       44       --       --       --
Employee separation costs....................     --      (22)      --       --       --
Other........................................     --       --      (23)      --      (28)
                                                ----     ----     ----     ----      ---
     Total Special Items.....................   $(45)    $ (6)    $ 80     $ 24      $26
                                                ====     ====     ====     ====      ===
</TABLE>
    
 
   
     First half 1998 Special Items reflect a $23 million gain on the sale of
North Sea producing and non-producing properties and a $31 million gain from the
sale of an international subsidiary versus a $24 million gain from the sale of
US producing properties in the first half of 1997. Other losses in the first
half of 1998 reflect anticipated costs of $28 million to resolve various
litigation claims.
    
 
   
     Special Items in 1997 include $240 million in gains from asset sales
consisting of $191 million associated with both producing and non-producing
properties in the North Sea and $49 million in the United States. Such asset
sales are part of the Company's rationalization program, designed to improve
profitability by
    
 
                                       39
<PAGE>   41
 
disposing of marginal properties and concentrating operations on core
properties. A U.K. tax rate change also provided a $30 million benefit in 1997.
Largely offsetting these benefits were property impairments of $167 million,
with $55 million attributable to the write-down of an office building held for
sale in Europe and $112 million reflecting the impairment of certain
international non-revenue producing properties. Other losses of $23 million
include litigation settlements.
 
   
     Special Items in 1996 include $35 million in gains from asset sales
consisting of $19 million associated with the sale of the Company's retail
marketing business in Ireland and $16 million from the sale of producing and
non-producing properties in the United States. Environmental insurance
litigation recoveries also resulted in a $44 million benefit. Offsetting these
benefits was a $63 million impairment associated with a write-down of an
investment in a European gas marketing joint venture and employee separation
costs of $22 million.
    
 
   
     Special Items in 1995 reflect $45 million in property impairments
associated with implementation of Statement of Financial Accounting Standards
No. 121 -- "Accounting for Impairment of Long-lived Assets and for Long-lived
Assets to be Disposed of."
    
 
   
     Combined net income before Special Items ("Earnings Before Special Items")
was $504 million in the first half of 1998, $1,017 million in 1997, $869 million
in 1996 and $620 million in 1995.
    
 
     First Half 1998 versus First Half 1997
 
   
     The Company had first half combined net income of $530 million in 1998,
down 10 percent from $587 million in the first half of 1997. The Company had
Earnings Before Special Items of $504 million in the first half of 1998, down 10
percent from $563 million in the first half of 1997. Lower Earnings Before
Special Items primarily reflects lower net realizable crude oil and natural gas
prices. The effect of lower crude oil and natural gas prices was partly offset
by higher natural gas volumes, increased oil production in countries with lower
effective tax rates, lower exploration expenses, improved international
Downstream margins and the favorable resolution of certain tax issues.
    
 
     Sales and Other Operating Revenues for the first half of 1998 were $11.3
billion, down nine percent from the first half of 1997, primarily due to a
decrease in worldwide crude oil and natural gas prices and lower refined product
volumes and prices. Crude oil and refined product buy/sell and natural gas and
electric power resale activities in the first half of 1998 totaled $2.4 billion,
down three percent compared to $2.5 billion in the first half of 1997.
 
     Cost of Goods Sold and Other Operating Expenses for the first half of 1998
totaled $6.8 billion, a decrease of $0.9 billion, or 12 percent, compared to
$7.7 billion in the first half of 1997, primarily due to lower crude oil,
natural gas and refined product prices and slightly lower crude oil and refined
product volumes offset partly by higher natural gas production.
 
     Selling, General and Administrative Expenses for the first half of 1998
totaled $370 million, an increase of $15 million, or four percent, compared to
$355 million in the first half of 1997, primarily due to higher costs in
international Downstream marketing operations resulting from retail marketing
expansion activities in countries with better growth potential over the
long-term.
 
     Exploration Expenses for the first half of 1998 totaled $176 million, a
decline of $16 million, or eight percent, compared to $192 million in the first
half of 1997, due to lower amortization of non-producing leasehold properties in
the United States and lower exploration overhead and operating expenses
resulting from seismic surveys conducted in 1997 in the Gulf of Paria located
between Venezuela and Trinidad and the Merida Andes foothills in Venezuela,
offset by higher international dry hole costs.
 
     Depreciation, Depletion and Amortization for the first half of 1998 totaled
$505 million, or two percent lower, compared to $516 million in the first half
of 1997.
 
     Provision for Income Taxes for the first half of 1998 totaled $254 million,
down 57 percent compared to $590 million for the first half of 1997. This
reflects an effective tax rate of approximately 32 percent in the first half of
1998 compared to 50 percent in the first half of 1997 due to increased oil
production in countries with lower effective tax rates and the favorable
resolution of certain tax issues.
                                       40
<PAGE>   42
 
     1997 versus 1996
 
   
     Combined net income for 1997 of $1,097 million was up 27 percent from $863
million the prior year. The Company had Earnings Before Special Items of $1,017
million in 1997, up 17 percent from $869 million in 1996. The increase was
attributable to improved U.S. natural gas prices and higher international
natural gas volumes in addition to stronger worldwide Downstream product margins
and increased worldwide refinery production.
    
 
     Sales and Other Operating Revenues of $25.8 billion in 1997 were up six
percent compared to $24.2 billion in the prior year, as higher Downstream
product prices and volumes, increased international natural gas volumes and
stronger domestic natural gas prices more than compensated for lower crude oil
prices. Crude oil and refined product buy/sell and natural gas and electric
power resale activities in 1997 totaled $5.5 billion, up 32 percent compared to
$4.2 billion in 1996.
 
     Cost of Goods Sold and Other Operating Expenses in 1997 totaled $16.2
billion, up 11 percent compared to $14.6 billion in 1996, due to higher refined
product volumes and crude oil and refined product buy/sell contract activity and
natural gas and electric power resale activities.
 
     Selling, General and Administrative Expenses in 1997 totaled $726 million,
a decrease of $29 million, or four percent, compared to $755 million in 1996,
primarily due to one-time costs in 1996 for retail expansion activities in the
U.S.
 
     Exploration Expenses in 1997 totaled $457 million, an increase of $53
million, or 13 percent, compared to $404 million in 1996, due to higher
international exploration overhead and operating costs primarily from seismic
surveys conducted in the Gulf of Paria located between Venezuela and Trinidad
and in the Merida Andes foothills in Venezuela, higher international dry hole
costs and an adjustment of certain non-producing U.S. leasehold properties.
 
     Depreciation, Depletion and Amortization in 1997 totaled $1,179 million, an
increase of $94 million, or nine percent, compared to $1,085 million in 1996 due
to higher depreciation resulting from a write down of an office building held
for sale in the U.K. and an impairment of certain international non-revenue
producing properties partially offset by lower depreciation in U.S. Downstream
operations.
 
     Provision for Income Taxes totaled $1,010 million in 1997, down three
percent compared to $1,038 million in 1996. The lower provision reflects an
effective tax rate of approximately 48 percent in 1997 compared to 55 percent in
1996. The decrease in the effective tax rate was primarily due to a lower
proportion of earnings from operations in countries with higher effective tax
rates.
 
     1996 versus 1995
 
   
     Combined net income for 1996 of $863 million was up 50 percent from $575
million in 1995. The Company had Earnings Before Special Items of $869 million
in 1996, up 40 percent from $620 million in 1995. The improvement was due to
higher crude oil and natural gas prices, higher international crude oil and
natural gas volumes, and higher refining margins. Partly offsetting these
benefits were startup costs related to the Humber refinery's new vacuum unit in
the United Kingdom.
    
 
     Sales and Other Operating Revenues of $24.2 billion in 1996 were up 19
percent compared with $20.3 billion in 1995, principally resulting from higher
worldwide crude oil and natural gas prices and higher international crude oil
and natural gas volumes, partly offset by lower industry-wide marketing prices.
Crude oil and refined product buy/sell contracts and natural gas and electric
power resale activities in 1996 totaled $4.2 billion, up 67 percent compared to
$2.5 billion in 1995.
 
     Cost of Goods Sold and Other Operating Expenses in 1996 totaled $14.6
billion, an increase of $3.5 billion or 31 percent, compared to $11.1 billion in
1995 due to higher crude oil and natural gas prices and higher volumes for crude
oil, natural gas and refined products, higher purchased refined product costs
and increased activity from crude oil and refined products buy/sales and natural
gas resales.
 
                                       41
<PAGE>   43
 
   
     Selling, General and Administrative Expenses in 1996 totaled $755 million,
an increase of $27 million, or four percent, compared to $728 million in 1995,
primarily due to one-time costs for retail marketing expansion activities in the
U.S.
    
 
     Exploration Expenses in 1996 totaled $404 million, an increase of $73
million, or 22 percent, compared to 1995 of $331 million, primarily due to
higher exploration overhead and operating costs in the United States and Norway
and higher U.S. and international dry hole costs.
 
     Depreciation, Depletion and Amortization in 1996 totaled $1,085 million, an
increase of $18 million, or 2 percent, compared to $1,067 in 1995, primarily due
to higher depreciation from Eastern European retail marketing expansion
activities and impairments of certain international non-revenue producing
properties offset partially by lower depreciation in U.S. Downstream operations.
 
     Provision for Income Taxes totaled $1,038 in 1996, up 34 percent compared
to $774 million in 1995. This reflects a relatively constant effective tax rate
of approximately 55 percent in 1996 compared to 57 percent in 1995.
 
UPSTREAM SEGMENT RESULTS
 
   
<TABLE>
<CAPTION>
                                                                               SIX MONTHS
                                                                                  ENDED
                                                    YEAR ENDED DECEMBER 31,     JUNE 30,
                                                    ------------------------   -----------
                                                     1995     1996     1997    1997   1998
                                                    ------   ------   ------   ----   ----
                                                                (IN MILLIONS)
<S>                                                 <C>      <C>      <C>      <C>    <C>
Combined Net Income...............................   $492     $681     $884    $454   $359
Special Items.....................................     39       58     (147)    (24)   (54)
                                                     ----     ----     ----    ----   ----
Earnings Before Special Items.....................   $531     $739     $737    $430   $305
                                                     ====     ====     ====    ====   ====
</TABLE>
    
 
     First Half 1998 versus First Half 1997
 
   
     Upstream combined net income was $359 million in the first half of 1998,
down 21 percent from $454 million in the first half of 1997. Upstream Earnings
Before Special Items was $305 million in the first half of 1998, down 29 percent
from $430 million in the first half of 1997.
    
 
   
     The Company's worldwide net realized crude oil price was $13.01 per barrel
for the first half of 1998, down $6.17 per barrel, or 32 percent, from $19.18
per barrel in the first half of 1997. Excess supply caused by weak Asian demand,
higher crude oil production from OPEC producing countries and warmer winter
weather caused the sharp drop in crude oil prices. Worldwide natural gas prices
averaged $2.37 per thousand cubic feet (mcf) for the first half, compared with
$2.62 per mcf in the same period in 1997 because of warmer winter weather. Lower
worldwide natural gas prices were primarily driven by lower natural gas prices
outside the United States. Worldwide crude oil and condensate production in the
first half of 1998 was 317,000 barrels per day versus 319,000 barrels per day in
the first half of 1997. Worldwide natural gas production in the first half of
1998 was up eight percent to 1,307 million cubic feet per day from 1,210 million
cubic feet per day in the first half of 1997.
    
 
   
     U.S. Upstream Earnings Before Special Items totaled $144 million in the
first half of 1998, down 40 percent from $241 million in the comparable period
of 1997. Lower U.S. Upstream Earnings Before Special Items was due to lower
crude oil and natural gas prices and lower crude oil volumes due to asset
dispositions and crude oil production declines. These factors more than offset
benefits from increased natural gas production and lower exploration expenses.
Natural gas volumes were up 16 percent as increased production from the holdings
in the South Texas Lobo trend acquired in 1997 more than offset the decline in
natural gas production elsewhere.
    
 
   
     Outside the United States, Upstream Earnings Before Special Items was $161
million, down 15 percent, from $189 million in the comparable period in 1997,
primarily due to lower crude oil and natural gas prices offset by higher natural
gas volumes, lower exploration expenses, and the favorable resolution of certain
tax issues. Despite slightly lower crude oil volumes resulting from the sale of
the Company's interest in the mature
    
 
                                       42
<PAGE>   44
 
Ula and Gyda fields in Norway, earnings benefited from higher production from
countries with relatively lower tax rates (primarily the United Kingdom and
Nigeria).
 
     1997 versus 1996
 
   
     Upstream combined net income was $884 million in 1997, up 30 percent,
compared to $681 million in 1996. Upstream Earnings Before Special Items totaled
$737 million in 1997, essentially unchanged from the previous year.
    
 
     Worldwide natural gas prices were up 14 percent to $2.51 per mcf in 1997
from $2.21 per mcf in 1996 resulting primarily from higher U.S. industry demand.
Worldwide net realized crude oil prices were $18.58 per barrel, down $1.53 per
barrel, or eight percent, from $20.11 per barrel in 1996. Crude oil prices
declined despite higher crude oil demand and strong crude oil production growth,
which included initial exports of Iraqi crude oil. Worldwide crude oil and
condensate production averaged 337,000 barrels per day for the year, up slightly
versus 1996. Worldwide natural gas deliveries in 1997 of 1,203 million cubic
feet per day were essentially unchanged from 1,211 million cubic feet per day in
1996 as higher international natural gas volumes were offset by lower domestic
natural gas volumes.
 
   
     U.S. Upstream Earnings Before Special Items totaled $396 million, up 30
percent from $305 million in 1996, due to higher gas prices which more than
offset lower crude oil prices. U.S. production costs per BOE were $4.23, up
$0.12 per BOE or 3 percent, compared to $4.11 per BOE in 1996, due to higher
production taxes.
    
 
   
     Outside the United States, Earnings Before Special Items was $341 million,
down 21 percent from $434 million in 1996 due to lower crude oil prices, partly
offset by increased crude oil and natural gas volumes associated with the first
year of oil production from Nigeria and increased production from the Heidrun
and Troll fields in Norway and the Canadian Foothills. International production
costs per BOE were $4.19 per BOE, up $0.51 per BOE, or 14 percent, compared to
$3.68 per BOE in 1996, resulting from FPSO lease costs on new fields in the
United Kingdom and costs incurred on development projects that have not yet
begun production.
    
 
     1996 versus 1995
 
   
     Upstream combined net income was $681 million in 1996, up 38 percent,
compared with $492 million in 1995. Upstream Earnings Before Special Items
totaled $739 million in 1996, up 39 percent from $531 million in 1995.
    
 
     The Company's worldwide net realized crude oil price averaged $20.11 per
barrel for 1996, up 22 percent from $16.52 per barrel in 1995. Higher crude oil
prices were the result of colder weather, stronger worldwide economic growth and
tight inventories. Worldwide natural gas prices averaged $2.21 per mcf in 1996,
compared to $1.86 per mcf in 1995 resulting from stronger worldwide demand.
Worldwide crude oil and condensate production was 336,000 barrels per day for
1996 compared to 317,000 barrels per day in 1995. Worldwide natural gas
deliveries were 1,211 million cubic feet per day in 1996 compared to 1995
deliveries of 1,126 million cubic feet per day due to higher international
natural gas volumes, offset partly by lower U.S. natural gas volumes.
 
   
     U.S. Upstream Earnings Before Special Items totaled $305 million, up $40
million, or 15 percent, versus the prior year due to higher crude oil and
natural gas prices. U.S. production costs per BOE were $4.11 per BOE, up $0.33
per BOE, or 9 percent, compared to $3.78 per BOE in 1995, due to higher
production taxes.
    
 
   
     Outside the United States, Earnings Before Special Items was $434 million,
up $168 million, or 63 percent, versus $266 million earned in 1995, due to
higher crude oil and natural gas prices and higher international natural gas
volumes. International natural gas volumes increased 23 percent due to
production increases in the United Kingdom and the Canadian Foothills.
International production costs per BOE were $3.68 per BOE, down $0.34 per BOE,
or 8 percent, compared to $4.02 per BOE in 1995, due to higher crude production
from the Heidrun field in Norway.
    
 
                                       43
<PAGE>   45
 
DOWNSTREAM SEGMENT RESULTS
 
   
<TABLE>
<CAPTION>
                                                                               SIX MONTHS
                                                                                  ENDED
                                                    YEAR ENDED DECEMBER 31,     JUNE 30,
                                                    ------------------------   -----------
                                                     1995     1996     1997    1997   1998
                                                    ------   ------   ------   ----   ----
                                                                (IN MILLIONS)
<S>                                                 <C>      <C>      <C>      <C>    <C>
Combined Net Income...............................   $233     $289     $307    $181   $181
Special Items.....................................      6      (52)      67      --     28
                                                     ----     ----     ----    ----   ----
Earnings Before Special Items.....................   $239     $237     $374    $181   $209
                                                     ====     ====     ====    ====   ====
</TABLE>
    
 
     First Half 1998 versus First Half 1997
 
   
     Downstream combined net income was $181 million in the first half of 1998
and the first half of 1997. Downstream Earnings Before Special Items totaled
$209 million in the first half of 1988, up 15 percent from $181 million in the
first half of 1997, due to higher European refined product margins.
    
 
   
     U.S. Downstream Earnings Before Special Items was $114 million in the first
half of 1998, down $16 million, or 12 percent from $130 million in the first
half of 1997, due to lower marketing margins and lower refined product sales
volumes.
    
 
   
     International Downstream Earnings Before Special Items was $95 million in
the first half of 1998, up 86 percent, from $51 million in the comparable period
in 1997, reflecting higher refinery runs from less downtime from scheduled
maintenance at the Humber refinery and improved refining and marketing margins
offset by slightly lower refined product sales volumes. In the United Kingdom, a
continued strengthening of retail marketing prices resulted in higher marketing
margins.
    
 
     1997 versus 1996
 
   
     Downstream combined net income was $307 million, up six percent from $289
million in 1996. Downstream Earnings Before Special Items increased 58 percent
to $374 million in 1997, compared with $237 million in the prior year. Worldwide
refined product sales volumes were 1,048,000 barrels per day in 1997, up five
percent versus 1996.
    
 
   
     In the United States, Downstream Earnings Before Special Items was $239
million versus $136 million in 1996, an increase of 81 percent. The improvement
was attributable to strong refining margins, reduced operating costs and higher
refined product volumes from the new Lake Charles, Louisiana, hydrocracker
expansion project.
    
 
   
     International Downstream Earnings Before Special Items was $135 million, up
34 percent from $101 million in the comparable period in 1996, primarily due to
higher European refining margins and increased refinery production from the
Humber refinery's new vacuum unit in the U.K.
    
 
     The Company's refineries ran at 91 percent capacity in 1997, 10 percent
higher than 1996. The increase was primarily due to less downtime incurred in
1997, compared to 1996 when major expansions were taking place at the Lake
Charles and Humber refineries.
 
     1996 versus 1995
 
   
     Downstream combined net income was $289 million, up 24 percent from $233
million in 1995. Downstream Earnings Before Special Items of $237 million in
1996 was essentially unchanged from $239 million in 1995, as improved refining
margins were offset by higher marketing product costs. Worldwide refined product
sales volumes were 998,000 barrels per day in 1996, up from 983,000 barrels per
day in 1997.
    
 
   
     In the United States, Downstream Earnings Before Special Items was $136
million in 1996 compared with $122 million in 1995, an increase of 11 percent,
reflecting gradually improving retail margins despite higher marketing product
costs and startup costs relating to the new hydrocracker unit at the Lake
Charles refinery.
    
 
                                       44
<PAGE>   46
 
   
     International Downstream Earnings Before Special Items was $101 million,
down 14 percent versus $117 million in 1995, attributable to startup and other
costs relating to the Humber refinery's new vacuum unit in the United Kingdom.
    
 
     The Company's refineries ran at 83 percent of capacity in 1996, down 14
percent from 1995 due to more downtime incurred in 1996 relating to the major
expansions at the Lake Charles and Humber refineries.
 
CORPORATE AND OTHER SEGMENT RESULTS
 
     Corporate and Other combined net income includes:
 
   
<TABLE>
<CAPTION>
                                                                              SIX MONTHS
                                                 YEAR ENDED DECEMBER 31,    ENDED JUNE 30,
                                                 ------------------------   ---------------
                                                  1995     1996     1997     1997     1998
                                                 ------   ------   ------   ------   ------
                                                               (IN MILLIONS)
<S>                                              <C>      <C>      <C>      <C>      <C>
Net Interest Income (Expense)..................  $   5    $  28    $  35     $ 10     $ 39
Exchange Gains (Losses)........................    (40)      (7)      21        5        5
Other Corporate Expenses(1)....................   (115)    (128)    (150)     (63)     (54)
                                                 -----    -----    -----     ----     ----
Combined Net Income............................  $(150)   $(107)   $ (94)    $(48)    $(10)
                                                 =====    =====    =====     ====     ====
</TABLE>
    
 
- ---------------
 
(1) Includes general corporate expenses, other non-operating items and results
    for electric power and related-party insurance operations.
 
     First Half 1998 versus First Half 1997
 
     Corporate and Other results for the first half of 1998 were a loss of $10
million, an improvement of $38 million versus the comparable period in 1997,
primarily reflecting an improvement in Net Interest Income (Expense) due to
lower average related-party borrowings in the first half of 1998 versus 1997.
 
     On July 20, 1998, a dividend of $7,500 million was declared and paid by the
Company in the form of a promissory note to shareholders of record as of July
20, 1998. The resulting increase in debt will substantially increase the amount
of interest expense incurred by the Company in the third and fourth quarters of
1998. See "Pro Forma Combined Financial Statements."
 
     1997 versus 1996
 
     Corporate and Other reported a loss of $94 million in 1997, an improvement
of $13 million from 1996 results. Net Interest Income (Expense) in 1997 was
improved by $7 million versus 1996, primarily due to increased after-tax
capitalized interest on major Upstream development projects. The Company
incurred an after-tax exchange gain of $21 million in 1997 compared with a loss
of $7 million in 1996, primarily reflecting the impact of Norwegian Kroner and
British Pound exchange rate movements on U.S. dollar-denominated working capital
balances. Other Corporate Expenses were $22 million higher in 1997 versus 1996
due to additional costs associated with the Company's emerging electric power
business and other miscellaneous items.
 
     1996 versus 1995
 
     Corporate and Other reported a loss of $107 million in 1996, an improvement
of $43 million over 1995. Net Interest Income (Expense) in 1996 improved $23
million versus 1995, primarily reflecting increased after-tax capitalized
interest on major Upstream development projects. The Company incurred an
after-tax exchange loss of $7 million in 1996, compared with a loss of $40
million in 1995, primarily attributable to the January 1, 1996 change in
reporting to reflect the local currency as the functional currency for the
Company's integrated Western European operations. (See Note 2 to the Combined
Financial Statements).
 
                                       45
<PAGE>   47
 
LIQUIDITY AND CAPITAL RESOURCES
 
     CASH PROVIDED BY OPERATIONS
 
     Cash provided by operations in the first half of 1998 decreased $307
million to $548 million versus $855 million in the first half of 1997. Cash
provided by operations before changes in operating assets and liabilities
decreased $53 million compared to the first half of 1997, primarily due to lower
net realized crude oil and natural gas prices partially offset by higher natural
gas volumes and improved international Downstream margins. Negative changes to
net operating assets and liabilities of $254 million were due to higher tax
payments attributable to 1997 asset sales, a decrease in accounts payable
largely offset by a decrease in accounts receivable due to lower crude oil
prices and the timing of payments on other operating liabilities.
 
     Cash provided by operations increased $480 million to $2,876 million during
1997, a 20 percent increase over $2,396 million in 1996, as cash provided by
operations before changes in operating assets and liabilities improved $34
million compared to 1996. Positive changes to net operating assets and
liabilities of $446 million were principally due to the $303 million received
from a contract for future sales of natural gas to Centrica, a United Kingdom
gas marketing company.
 
     Cash provided by operations increased $472 million to $2,396 million during
1996, a 25 percent increase over $1,924 million in 1995. The improvement from
1995 reflects a $263 million increase in 1996 cash provided by operations before
changes in operating assets and liabilities, primarily due to higher crude oil
and natural gas prices, higher international crude oil and natural gas volumes
and higher refinery margins. Positive changes to net operating assets and
liabilities of $209 million were primarily due to timing of payments on
operating liabilities and tax payments.
 
CAPITAL EXPENDITURES AND INVESTMENTS
 
   
<TABLE>
<CAPTION>
                                                                       SIX MONTHS ENDED
                                            YEAR ENDED DECEMBER 31,        JUNE 30,
                                            ------------------------   -----------------
                                             1995     1996     1997     1997      1998
                                            ------   ------   ------   -------   -------
                                                           (IN MILLIONS)
<S>                                         <C>      <C>      <C>      <C>       <C>
Upstream..................................  $1,224   $1,264   $2,533   $1,611    $  804
Downstream................................     613      680      558      196       241
Corporate and Other.......................      --       --       23        8         5
                                            ------   ------   ------   ------    ------
                                            $1,837   $1,944   $3,114   $1,815    $1,050
                                            ======   ======   ======   ======    ======
United States.............................  $  760   $  618   $1,761   $1,187    $  469
International.............................   1,077    1,326    1,353      628       581
                                            ------   ------   ------   ------    ------
                                            $1,837   $1,944   $3,114   $1,815    $1,050
                                            ======   ======   ======   ======    ======
</TABLE>
    
 
     The Company's capital expenditure program promotes the Company's
growth-oriented business strategy by continuing to invest in existing core areas
where efficiencies and profitability can be enhanced and by targeting funds into
new high potential areas where long-term growth opportunities can be realized.
 
     Total capital investments, including investments in affiliates and
acquisitions, were $3.1 billion in 1997, a 60 percent increase over 1996. This
increase primarily reflects the $0.9 billion spent in connection with the Lobo
Acquisition. Capital investments in 1996 and 1995 were $1.9 and $1.8 billion,
respectively. The six percent increase in 1996 from 1995 is primarily
attributable to increased investment in Upstream operations in Europe and, in
particular, development of the Britannia gas field. Exploration capital
investments were approximately $0.2 billion each year in 1997, 1996 and 1995.
 
   
     The Company expects to make capital investments of $2.4 billion during
1998, up approximately 14 percent versus 1997 capital investments excluding the
Lobo Acquisition. Approximately 60 percent of 1998 capital investments are
targeted outside the United States. Approximately 70 percent of 1998 capital
investments are allocated to Upstream, with a majority of this devoted to
development projects in South Texas, deepwater Gulf of Mexico, Venezuela, the
U.K. and Norway. Approximately $0.2 billion will also be devoted to exploratory
drilling. Downstream capital investments are targeted at completion of the
Melaka
    
 
                                       46
<PAGE>   48
 
refinery, expansion of retail marketing operations, particularly in Europe, and
upgrades and maintenance of existing facilities. The Company has also earmarked
approximately $50 million for its emerging electric power business. The
Company's capital investment program may be adjusted as business conditions
warrant. See also "Business."
 
     Upstream
 
     Upstream capital investments totaled $2.5 billion in 1997, an increase of
100 percent over 1996, primarily reflecting the $0.9 billion Lobo Acquisition.
The Lobo Acquisition added significant reserves and 1,150 miles of natural gas
gathering and transportation pipeline, providing direct access to major Texas
intrastate and interstate pipelines. As a result, the Company is the largest
natural gas producer in the area, and one of the three largest natural gas
producers in Texas. Upstream capital investments were $1.3 billion and $1.2
billion in 1996 and 1995, respectively.
 
     -- United States
 
     During 1997, the Company spent $1.5 billion on capital projects in the
United States. Besides the $0.9 billion Lobo Acquisition and exploratory
drilling, expenditures focused on development of the partner-operated Ursa field
in deepwater Gulf of Mexico, construction of two deepwater drillships,
acquisition of additional reserves and exploratory acreage in the San Juan Basin
and expansion of onshore natural gas operations. The Ursa field development,
operated by Shell, represents the Company's most important current development
project in the Gulf of Mexico. The project involves installing a new generation
tension leg platform in approximately 3,800 feet of water. First production is
scheduled for 1999. The construction of the two deepwater drillships is pivotal
in achieving the Company's growth plans in the Gulf of Mexico. The Company has
increased its deepwater holdings in the Gulf of Mexico, and exploration within
these holdings will be carried out by the two highly sophisticated deepwater
drillships. The first of these two vessels is expected to be in service in late
1998.
 
     In 1996, U.S. capital investments were $0.4 billion, with expenditures
focused on continuing operations and development. Capital investments were $0.5
billion in 1995 and included the acquisition of two South Texas gas fields from
Enron Oil & Gas Company. These two gas fields were located near existing Company
assets and offered considerable potential development.
 
     -- International
 
     International capital investments totaled nearly $1.0 billion in 1997, up
16 percent from 1996. The Company continued to develop the Britannia gas field
in the U.K. North Sea. The Britannia gas field is one of the largest natural gas
fields in the U.K. North Sea, and the Company's proved reserves in the field
include 1.1 trillion cubic feet of natural gas and 52 million barrels of
petroleum liquids at December 31, 1997. First production from Britannia occurred
in August 1998. Britannia development is an example of the Company's strategy to
increase production and reserves through large, long-lived projects. Other
significant capital investments were made for exploratory drilling and
development projects such as the Petrozuata joint venture in Venezuela, the
Ukpokiti field offshore Nigeria, the Visund field in the Norwegian North Sea, a
methanol plant in Norway and the Boulton gas field in the U.K. North Sea.
 
     In 1996, international capital investments were $0.9 billion, up 14 percent
compared to $0.8 billion in 1995. The 1996 increase reflects expenditures to
develop the Britannia field and $67 million to fund the Company's share of
losses incurred by a European gas marketing joint venture. These increases were
partially offset by reduced capital expenditures due to the Heidrun field in
Norway coming on stream in late 1995.
 
     Downstream
 
     Downstream capital investments totaled $558 million in 1997, a decrease of
18 percent versus 1996, primarily reflecting completion of the acidic crude
vacuum unit at the Company's Humber refinery in the U.K. as well as the
acquisition of an equity interest in two refineries in the Czech Republic during
1996. Downstream capital investments were $680 and $613 million in 1996 and
1995, respectively. The 11 percent
                                       47
<PAGE>   49
 
increase in 1996 versus 1995 reflects increased expenditures for construction of
the Melaka refinery and acquisition of equity interests in two Czech refineries,
somewhat offset by decreased expenditures on the Lake Charles refinery's
hydrocracker expansion project, and construction of retail marketing outlets in
Thailand during 1995.
 
     -- United States
 
     During 1997, the Company spent $227 million on Downstream capital projects
in the United States, up four percent from 1996, with the majority of these
funds being used to support continuing operations and optimization of retail
marketing operations. The Company also invested funds for an equity interest in
Penreco, a joint venture with Pennzoil that will produce and market highly
refined specialty petroleum products.
 
     Capital investments in 1996 totaled $218 million, down 26 percent from
1995. The most significant investments related to the completion of the 45,000
barrel per day expansion of the Lake Charles refinery's sour crude oil
processing capability to support the Excel Paralubes lube oil hydrocracker,
another joint venture with Pennzoil. The lube oil hydrocracker converts low
quality, high sulphur crude oil into base oil of extremely high purity and
enhances the value of the Company's finished lubricants business by producing
improved motor oils, transmission fluids and industrial lubes blended from
hydrocracked base oils.
 
   
     Investments in 1995 totaled $293 million and included costs for the
construction of a plant to produce LiquidPower(TM), the acquisition of 61 retail
marketing outlets, and initial costs associated with the Lake Charles refinery
expansion. The manufacturing plant for LiquidPower(TM) allowed the Company to
meet growing demand for this product. LiquidPower(TM) is a flow improver, which
allows operators of crude oil and product pipelines to maintain throughput
levels with fewer electric pump stations, thereby significantly lowering
operating costs.
    
 
     -- International
 
   
     During 1997, the Company spent $331 million on Downstream international
capital investments, down 28 percent from 1996, due to expenditures in 1996
relating to costs for the acidic crude vacuum unit at the Company's Humber
refinery. The installation of the vacuum unit at the Humber refinery allowed the
refinery to process acidic crude oil, including equity crude oil from the
Heidrun field. The vacuum unit incorporated special metallurgy and the Company
believes that Humber is the only refinery in Europe capable of processing
unblended acidic crude. Expenditures in 1997 focused on strengthening the
Company's retail marketing position in core markets such as Germany, Austria and
the Nordic countries, expanding in targeted retail growth markets in Central and
Eastern Europe, Spain, Turkey and the Asia Pacific region, and continuing the
construction of the Melaka refinery, which is expected to begin operations in
the second half of 1998. The Company believes that the Melaka refinery, 40
percent owned by the Company, will provide a source of product to support the
Company's expanding marketing activities in the Asia Pacific region.
    
 
     Capital investments in 1996 totaled $462 million, up 44 percent from 1995
and included costs for the acidic crude vacuum unit at the Company's Humber
refinery, construction expenditures related to the Melaka refinery, acquisition
of equity interests in two Czech refineries, and expansion of retail marketing
operations, particularly in Eastern Europe. The acquisition of the equity
interests in the two Czech refineries supported the expansion of the Company's
retail marketing operations in the emerging markets in Eastern Europe, including
the Czech Republic, Poland, Hungary and Slovakia.
 
   
     In 1995, the Company made capital investments of $320 million including
investments in the Humber and Melaka refinery projects, an acquisition of a 28.9
percent equity interest in a Turkish distribution and marketing company, and the
opening of retail marketing outlets in Thailand. The acquisition of the equity
interest in the Turkish distribution and marketing company enabled the Company
to increase its market share in Turkey's emerging motor fuels market.
    
 
                                       48
<PAGE>   50
 
     Corporate and Other
 
   
     Capital investments in 1997 were $23 million, most of which represents the
Company's investment in electric power generation projects in international
equity affiliates. Because of deregulation within this industry, the Company
expects to continue to pursue projects which leverage the economic advantages of
the Company's energy production activities and the demand for energy in DuPont
or third party manufacturing operations.
    
 
     There were no capital investments in Corporate and Other during 1996 and
1995.
 
     FINANCING
 
     The Company's ability to maintain and grow its operating income and cash
flow is dependent upon continued capital spending. The Company believes its
future cash flow from operations and its borrowing capacity should be sufficient
to fund its dividends, if any, debt service, capital expenditures, and working
capital requirements.
 
     Cash flow in 1996 includes a $269 million benefit from the formation of a
partnership, Conoco Oil and Gas Associates, L.P. ("COGA"), in which the Company
has a general partnership interest of 67 percent. The remaining 33 percent is
owned by Vanguard Energy Investors L.P. ("Vanguard"), of which the Company owns
10 percent. In 1996, certain of the Company's subsidiaries contributed assets
with an aggregate fair value of $613 million to COGA for a general partnership
interest. Cash of $300 million was contributed by Vanguard as limited partner
and under the terms of the partnership agreement, COGA can require an additional
cash contribution of up to $200 million from Vanguard prior to December 31,
1998. The net result of this transaction was to increase minority interest by
$297 million.
 
     Vanguard is entitled to a cumulative annual priority return on its
investment and participation in residual earnings at rates established in the
partnership agreement. The priority return rate, currently 6.5 percent, is
negotiated every four years commencing in 1999. If at that time Vanguard and the
Company are unable to agree on a priority return for the subsequent four-year
period, then the partnership would be dissolved, with COGA being required to
liquidate the partnership and distribute cash and properties to the partners
based on their individual interests. The estimated impact of such an event is a
cash outflow not materially different from the recorded amount of minority
interest. See Note 18 to the Combined Financial Statements.
 
   
     Prior to the Separation, the businesses transferred to the Company were
funded through DuPont. Apart from limited recourse project financings related to
various joint ventures, equipment lease facilities and financing of certain
refinery equipment and other smaller financings, the Company has had limited
indebtedness to third parties. After the Offerings, the Company's operations
will be funded through related party debt with DuPont. The Company and DuPont
will enter into a Revolving Credit Agreement under which DuPont will provide the
Company with a revolving credit facility in principal amount of up to $500
million. The term of DuPont's commitment under this facility will begin upon
satisfaction of certain conditions and continue until the earlier of (i) October
11, 1999 or (ii)(a) the date on which DuPont's direct or indirect voting power
in the Company falls below 50 percent of the outstanding voting power of the
Company or (b) DuPont's election to terminate its commitment as the result of an
unremedied event of default. Loans under the Revolving Credit Agreement will be
subject to mandatory prepayment to the extent the Company's cash and cash
equivalents exceed $325 million or such higher amount as the Company and DuPont
may agree. Loans under this facility will bear interest at a rate equal to
30-day LIBOR plus 0.20 percent per annum and may be voluntarily prepaid without
penalty or premium. The Company intends to refinance related party debt with a
combination of commercial paper, bank debt and public debt. See "Arrangements
Between the Company and DuPont and "Risk Factors -- Risk of Refinancing Debt
Owed to DuPont."
    
 
   
RECENT RESULTS
    
 
   
     Although the Company's results of operations for the third quarter of 1998
are not currently available, the following information reflects the Company's
expectations with respect to such results based on currently
    
 
                                       49
<PAGE>   51
 
   
available information. Conoco's third quarter results have been negatively
affected by market conditions that have affected the petroleum industry in
general. The Company's net realized prices in the third quarter of 1998 for
crude oil and natural gas are expected to be similar to net realized prices of
$12.37 per barrel of crude oil and $2.15 per thousand cubic feet of natural gas
in the second quarter of 1998. Third quarter prices for crude oil are expected
to be approximately 25 percent lower, and third quarter prices for natural gas
are expected to be approximately 10 percent lower, than prices in the third
quarter of 1997. Oil production in the third quarter of 1998 is expected to be
similar to production of 314,000 barrels per day in the second quarter of 1998
and slightly lower than production in the third quarter of 1997. Natural gas
production for the third quarter of 1998 is expected to increase over production
of 1,326 million cubic feet per day in the second quarter of 1998 and over
production in the third quarter of 1997. The Company expects refining margins
per barrel for Downstream activities in the third quarter of 1998 to be slightly
higher than margins in the second quarter of 1998 but lower than margins in the
third quarter of 1997. Based on the cumulative effect of these factors, the
Company expects that Upstream and Downstream earnings before material
non-recurring items for the third quarter of 1998 will be comparable to the $200
million of such earnings for the second quarter of 1998, but will be lower than
the $252 million of such earnings for the third quarter of 1997. Additionally,
third quarter 1998 interest and debt expense will be significantly higher due to
additional debt of $7.5 billion owed to DuPont. Actual results may differ
materially from these third quarter estimates.
    
 
MARKET RISKS
 
     The Company operates in the worldwide crude oil, refined product, natural
gas and natural gas liquids markets and is exposed to fluctuations in interest
rates, foreign currency exchange rates and hydrocarbon prices that can affect
the revenues and cost of operating, investing and financing. The Company's
management has and intends to use financial and commodity based derivative
contracts to reduce the risk in the Company's overall earnings and cash flow
when the benefits of avoiding disruption of the Company's value creation process
(primarily long-term exploration and capital investment programs) are
anticipated to more than offset the risk management costs involved.
 
     The Company has established a Financial Risk Management Policy Framework
that provides guidelines for entering into contractual arrangements
(derivatives) to manage the Company's commodity price, foreign currency exchange
rate, and interest rate risks. The Conoco Risk Management Committee has ongoing
responsibility for the content of this policy and has principal oversight
responsibility for compliance with the policy framework by ensuring proper
procedures and controls are in place. These procedures establish derivative
control and valuation processes, routine monitoring and reporting requirements
and counterparty credit approval procedures. Additionally, the Company's
internal audit group conducts routine reviews of these risk management
activities to assess the adequacy of internal controls and the audit results are
reviewed by the Conoco Risk Management Committee and by operating management.
 
   
     The counterparties to these contractual arrangements are limited to major
financial institutions and other major companies in the petroleum business.
Although the Company is exposed to credit loss in the event of nonperformance by
these counterparties, this exposure is managed through credit approvals, limits
and monitoring procedures, and limits to the period over which unpaid balances
are allowed to accumulate. The Company has not experienced nonperformance by
counterparties to these contracts, and no material loss would be expected from
any such individual nonperformance.
    
 
     COMMODITY PRICE RISK
 
     The Company enters into energy-related futures, forwards, swaps and options
in various markets to balance its physical systems to meet customer needs and to
manage its exposure to price fluctuations on anticipated crude oil, natural gas,
refined product and electric power transactions. These instruments provide a
natural extension of the underlying cash market and are used to physically
acquire a portion of supply requirements and to manage pricing of near term
physical requirements. The commodity futures market has underlying principles of
increased liquidity and longer trading periods than the cash market and is one
method of managing price risk in the petroleum business.
 
                                       50
<PAGE>   52
 
     From time to time, management may use derivatives to establish longer-term
positions to hedge the price risk for the Company's equity crude oil and natural
gas production as well as refinery margins.
 
     Under the Company's policy, hedging includes only those transactions that
offset physical positions and reduce overall company exposure to prevailing
market price risk. Trading is defined as any transaction that does not meet the
definition of a hedge. After-tax gain/loss from risk trading has not been
material.
 
     The fair value gain (loss) of outstanding derivative commodity instruments
and the change in fair value that would be expected from a 10 percent adverse
price change are shown in the table below:
 
   
<TABLE>
<CAPTION>
                                                                              CHANGE
                                                                             IN FAIR
                                                                            VALUE FROM
                                                                               10%
                                                                             ADVERSE
                                                                              PRICE
                    AT DECEMBER 31, 1997                       FAIR VALUE     CHANGE
                    --------------------                       ----------   ----------
                                                                   ($ IN MILLIONS)
<S>                                                            <C>          <C>
Crude Oil and Refined Products:
  Hedging...................................................       (3)          (8)
  Trading...................................................       (6)         (18)
  Combined..................................................       (9)         (26)
Natural Gas -- Hedging......................................        8           (9)
Electric Power Trading......................................       --           --
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                                              CHANGE
                                                                             IN FAIR
                                                                            VALUE FROM
                                                                               10%
                                                                             ADVERSE
                                                                              PRICE
                      AT JUNE 30, 1998                         FAIR VALUE     CHANGE
                      ----------------                         ----------   ----------
                                                                   ($ IN MILLIONS)
<S>                                                            <C>          <C>
Crude Oil and Refined Products:
  Hedging...................................................       (7)          (3)
  Trading...................................................      (11)          (5)
  Combined..................................................      (18)          (8)
Natural Gas -- Hedging......................................       10          (13)
Electric Power Trading......................................       --           --
</TABLE>
    
 
     The fair values of the futures contracts are based on quoted market prices
obtained from the New York Mercantile Exchange or the International Petroleum
Exchange of London. The fair values of swaps and other over-the-counter
instruments are estimated based on quoted market prices of comparable contracts
and approximate the gain or loss that would have been realized if the contracts
had been closed out at year end.
 
     All hedge positions offset physical positions exposed to the cash market;
none of these offsetting physical positions are included in the above table.
 
     Price-risk sensitivities were calculated by assuming an across-the-board 10
percent adverse change in prices regardless of term or historical relationships
between the contractual price of the instrument and the underlying commodity
price. In the event of an actual 10 percent change in prompt month crude or
natural gas prices, the fair value of the Company's derivative portfolio would
typically change less than that shown in the table due to lower volatility in
out-month prices.
 
     Additional details regarding accounting policy for these financial
instruments are set forth in Note 2 to the Combined Financial Statements.
 
     FOREIGN CURRENCY EXCHANGE RATE RISK
 
     The Company's operations in 40 countries expose it to foreign currency
exchange rate risk. The Company does not intend to comprehensively hedge its
exposure to currency rate changes, although it may choose to
 
                                       51
<PAGE>   53
 
   
selectively hedge certain working capital balances, firm commitments, cash
returns from subsidiaries and affiliates and/or tax payments. There can be no
assurance these efforts will be successful. Historically, the Company has
selectively hedged firm commitments. At July 31, 1998, the Company had no open
foreign currency hedged positions. Cash balances are maintained in U.S. dollars
and foreign currency denominations principally including U.K. Pounds, Deutsch
Marks, Norwegian Kroner and Swedish Kroner. The effect of foreign currency
exchange rate changes on cash increased cash balances $33 million in 1995, and
decreased cash balances $2 million in 1996 and $39 million in 1997. The Company
has experienced negative foreign currency impacts from currency revaluations in
Southeast Asia, but these losses have not been material.
    
 
     INTEREST RATE RISK
 
     Due to limited third party borrowings, the Company had no material interest
rate risk associated with the debt used to finance its operations. Certain major
capital investments were financed using project finance. The Company managed the
interest rate risk of these transactions, when appropriate, with a combination
of financial derivative instruments to balance the fixed and floating interest
rates. Subsequent to the Offerings, the Company intends to manage its interest
rate exposure using a combination of financial derivative instruments as part of
its program to manage the fixed and floating interest rate mix of the total
debt.
 
ENVIRONMENTAL EXPENDITURES
 
     The costs to comply with complex environmental laws and regulations, as
well as internal voluntary programs, are significant and will continue to be so
in the foreseeable future. For example, the Company anticipates substantial
expenditures will be necessary to comply with Maximum Achievable Control
Technology ("MACT") standards to be promulgated by EPA under the Clean Air Act,
and specifications for motor fuels designed to reduce emissions of certain
pollutants from vehicles using such fuels. See "Business -- Environmental
Regulation -- Air Emissions." These costs may increase in the future, but are
not expected to have a material adverse effect on the Company's financial
condition, results of operations or liquidity.
 
     Estimated pre-tax environmental expenses charged to current operations
totaled about $136 million, before insurance recoveries, in 1997 as compared to
approximately $162 million in 1996 and $129 million in 1995. These expenses
include the remediation accruals discussed below, operating maintenance and
depreciation costs for solid waste, air and water pollution control facilities
and the costs of certain other environmental activities. The largest of these
expenses resulted from the operation of wastewater treatment facilities and
solid waste management facilities and facilities for the control and abatement
of air emissions. Approximately 70 percent of total annual environmental
expenses resulted from the operations of the Company's business in the United
States.
 
   
     Capital expenditures for environmental control facilities totaled
approximately $50 million in 1997, as compared to approximately $78 million in
1996 and $68 million in 1995. The Company estimates that capital expenditures
for pollution control facilities will total approximately $51 million in 1998
and approximately $52 million in 1999.
    
 
     REMEDIATION EXPENDITURES
 
   
     The Resource Conservation and Recovery Act ("RCRA") extensively regulates
the treatment, storage and disposal of hazardous waste and requires a permit to
conduct such activities. RCRA requires permitted facilities to undertake an
assessment of environmental conditions at the facility. If conditions warrant,
the Company may be required to remediate contamination caused by prior
operations. In contrast to the Comprehensive Environmental Response,
Compensation, and Liability Act, as amended ("CERCLA"), often referred to as
"Superfund," the cost of corrective action activities under the RCRA corrective
action program is typically borne solely by the Company. The Company anticipates
significant ongoing expenditures for RCRA remediation activities may be required
over the next decade although annual expenditures for the near term are not
expected to vary significantly from the range of such expenditures over the past
few years. The Company's expenditures associated with RCRA and similar
remediation activities conducted voluntarily
    
 
                                       52
<PAGE>   54
 
or pursuant to state law were approximately $31 million in 1997, $34 million in
1996 and $32 million in 1995. In the long term, expenditures are subject to
considerable uncertainty and may fluctuate significantly.
 
     The Company from time to time receives requests for information or notices
of potential liability from EPA and state environmental agencies alleging that
the Company is a potentially responsible party ("PRP") under CERCLA or an
equivalent state statute. The Company on occasion also has been made a party to
cost recovery litigation by those agencies or by private parties. These
requests, notices and lawsuits assert potential liability for remediation costs
at various sites that typically are not Company owned but allegedly contain
wastes attributable to the Company's past operations. As of December 31, 1997,
the Company had been notified of potential liability under CERCLA or state law
at about 15 sites around the United States, with active remediation under way at
seven of those sites. The Company received notice of potential liability at four
new sites during 1997 compared with one similar notice in 1996 and one in 1995.
The Company's expenditures associated with CERCLA and similar state remediation
activities were not significant in 1997, 1996 and 1995.
 
     For most Superfund sites, the Company's potential liability will be
significantly less than the total site remediation costs because the percentage
of waste attributable to the Company versus that attributable to all other PRPs
is relatively low. Other PRPs at sites where the Company is a party typically
have had the financial strength to meet their obligations and, where they have
not, or where PRPs could not be located, the Company's own share of liability
has not materially increased. There are relatively few sites where the Company
is a major participant, and neither the cost to the Company of remediation at
those sites, nor at all CERCLA sites in the aggregate, is expected to have a
material adverse effect on the competitive or financial condition of the
Company.
 
     Cash expenditures not charged against income for previously accrued
remediation activities under CERCLA, RCRA and similar state and foreign laws
were $19 million in 1997, $19 million in 1996 and $16 million in 1995. Although
future remediation expenditures in excess of current reserves are possible, the
effect of any such excess on future financial results is not subject to
reasonable estimation because of the considerable uncertainty regarding the cost
and timing of expenditures. See "Business -- Environmental Regulation" and "Risk
Factors -- Environmental Risks."
 
     REMEDIATION ACCRUALS
 
     The Company accrues for remediation activities when it is probable a
liability has been incurred and reasonable estimates of the liability can be
made. These accrued liabilities exclude claims against the Company's insurers or
other third parties and are not discounted. Many of these liabilities result
from CERCLA, RCRA and similar state laws that require the Company to undertake
certain investigative and remedial activities at sites where the Company
conducts or once conducted operations or at sites where Company-generated waste
was disposed. The accrual also includes a number of sites identified by the
Company that may require environmental remediation, but which are not currently
the subject of CERCLA, RCRA or state enforcement activities. Over the next
decade, the Company may incur significant costs under both CERCLA and RCRA.
Considerable uncertainty exists with respect to these costs and under adverse
changes in circumstances, potential liability may exceed amounts accrued as of
December 31, 1997.
 
   
     Remediation activities vary substantially in duration and cost from site to
site depending on the mix of unique site characteristics, evolving remediation
technologies, diverse regulatory agencies and enforcement policies and the
presence or absence of potentially liable third parties. Therefore, it is
difficult to develop reasonable estimates of future site remediation costs. At
December 31, 1997, the Company's balance sheet included an accrued liability of
$144 million as compared to $152 million and $137 million at year-end 1996 and
1995, respectively. Approximately 84 percent of the Company's environmental
reserve at December 31, 1997 was attributable to RCRA and similar remediation
liabilities (excluding voluntary remediations) and 16 percent to CERCLA
liabilities. During 1997, remediation accruals of $13 million, offset by $54
million in insurance proceeds, resulted in a credit to pre-tax income of $41
million, compared to credits of $70 million and $13 million in 1996 and 1995,
respectively, also resulting from insurance recoveries. No significant
additional recoveries are expected.
    
 
                                       53
<PAGE>   55
 
TAX MATTERS
 
   
     As a result of the Separation and the Offerings, and possible subsequent
transactions, the Company likely will not be able to combine the results of its
operations with those of DuPont in reporting income for U.S. federal, state, and
non-U.S. income tax purposes. The Company believes this will not have a material
adverse effect on the Company's earnings. At the time the Company is no longer
included in DuPont's consolidated U.S. federal income tax return (which is
expected to occur immediately following the Offerings), it may become exposed to
having its U.S. tax liability computed under the U.S. federal alternative
minimum tax. Such a computation could have a material adverse effect on the
year-to-year timing of the Company's cash flow.
    
 
     As of December 31, 1997, the Company had deferred tax assets in the amount
of $1,065 million. Of this amount, $417 million related to tax benefits from
operating losses incurred in start-up operations, including exploration and U.S.
foreign tax credit carryforwards. These benefits were substantially offset by a
valuation reserve. The Company believes it is more likely than not the balance
of the deferred tax assets will be realized in future years.
 
YEAR 2000
 
   
     Historically, certain computerized systems have had two digits rather than
four digits to define the applicable year, which could result in recognizing a
date using "00" as the year 1900 rather than the year 2000. This could result in
major failures or miscalculations and is generally referred to as the "Year 2000
issue."
    
 
     The Company recognizes that the impact of the Year 2000 issue extends
beyond traditional computer hardware and software to automated plant systems and
instrumentation, as well as to third parties. The Year 2000 issue is being
addressed within the Company by its individual business units, and progress is
reported periodically to management.
 
   
     The Company has committed resources to conduct risk assessments and to take
corrective action, where required, within each of the following areas:
information technology, plant systems and external parties. Information
technology includes telecommunications as well as traditional computer software
and hardware in the mainframe, midrange and desktop environments. Plant systems
include all automation and embedded chips used in plant operations. External
parties include any third party with whom the Company interacts.
    
 
     In the information technology area, inventory and assessment audits in the
mainframe and midrange environments are expected to be completed by the third
quarter of 1998 with corrective action scheduled for completion by the fourth
quarter of 1998, except for business application software which is expected to
be completed by the fourth quarter of 1999. Inventory and assessment audits of
telecommunications are expected to be completed by the third quarter of 1998,
with corrective action expected to be completed by the second quarter of 1999.
Finally, inventory and assessment audits in the desktop environment are expected
to be completed by third quarter of 1998, with corrective action expected to be
completed by third quarter of 1999.
 
     In the plant systems area, 75 percent of the Company's business units have
completed their inventory and assessment audits; the remaining units are
expected to complete this work by fourth quarter 1998. The Company is relying on
vendor testing and certification with validation through limited internal
testing and/or industry test results. Downtime for normally scheduled plant
maintenance will be used to conduct testing, with corrective action expected to
be completed by second quarter of 1999.
 
   
     With respect to external parties, 65 percent of the Company's business
units have completed their inventory audit of critical external parties. The
remaining business units are expected to have completed this work by the fourth
quarter of 1998. Risk assessment is expected to be completed by the fourth
quarter of 1998, and monitoring of risk in this area will continue into 1999, as
many external parties will not have completed their work.
    
 
     The total cost of Year 2000 activities is not expected to be material to
the Company's operations, liquidity or capital resources. Costs are being
managed within each business unit. The total estimated cost for the
 
                                       54
<PAGE>   56
 
Company's Year 2000 work is $47 million. 1997 costs were $5 million, and 1998
costs through June 1998 were $9 million. Costs exclude expenditures for
replacement systems, which were previously scheduled.
 
   
     Failure to address a Year 2000 issue could result in business disruption
that could materially affect the Company's operations, liquidity or capital
resources. The Company has contingency plans to address other issues such as oil
tanker spills and plant explosions. Typically these contingency plans address
the results of single events while the scope of Year 2000 issues may cause
multiple concurrent events for a longer duration. Development of contingency
plans for multiple concurrent events is expected to be completed by the first
quarter of 1999.
    
 
     There is still uncertainty around the scope of the Year 2000 issue. At this
time the Company cannot quantify the potential impact of these failures. The
Company's Year 2000 program and contingency plans are being developed to address
issues within the Company's control. The program minimizes, but does not
eliminate, the issues of external parties.
 
EUROPEAN MONETARY UNION
 
   
     Within Europe, the European Economic and Monetary Union (the "EMU") will
introduce a new currency, the Euro, on January 1, 1999. The new currency is in
response to the EMU's policy of economic convergence to harmonize trade policy,
eliminate business costs associated with currency exchange and to promote the
free flow of capital, goods and services.
    
 
   
     On January 1, 1999, the participating countries are scheduled to adopt the
Euro as their local currency, initially available for currency trading on
currency exchanges and noncash (banking) transactions. The existing local
currencies, or legacy currencies, will remain legal tender through January 1,
2002. Beginning on January 1, 2002, Euro-denominated bills and coins will be
issued for cash transactions. For a period of six months from this date, both
legacy currencies and the Euro will be legal tender. On or before July 1, 2002,
the participating countries will withdraw all legacy currency and use
exclusively the Euro.
    
 
     The Company has recognized the introduction of the Euro as a significant
event with potential implications for existing operations. Currently,
participating countries in the EMU where the Company operates include Austria,
Belgium, Finland, Germany and Spain. The Company expects nonparticipating
European Union countries, such as Great Britain, to eventually join the EMU.
 
     The Company has committed resources to conduct risk assessments and to take
corrective actions, where required, to ensure the Company is prepared for the
introduction of the Euro. The Company has undertaken a review of the Euro
implementation and has concentrated on areas such as operations, finance,
treasury, legal, information management, procurement and others, both in
participating and nonparticipating European Union countries where the Company
operates. Also, a review of existing legacy accounting and business systems and
other business assets have been reviewed for Euro compliance, including
assessing any risks from third parties. Progress regarding Euro implementation
is reported periodically to management.
 
     Because of the staggered introduction of the Euro regarding noncash and
cash transactions, the Company has developed its plans to address first its
accounting and business systems and second, its business assets. The Company
expects to be Euro compliant within its accounting and business systems by the
end of 1999 and compliant within its other business assets prior to the
introduction of the Euro bills and coins. Compliance in participating and
nonparticipating countries will be achieved primarily through upgraded systems,
which were previously planned to be upgraded. Remaining systems will be modified
to achieve compliance. The Company does not currently expect to experience any
significant operational disruptions or to incur any significant costs, including
any currency risk, which could materially affect the Company's liquidity or
capital resources. The Company is preparing plans to address issues within the
transitional period when both legacy and Euro currencies may be tendered.
 
     Because of the competitive business environment within the petroleum
industry, the Company does not anticipate any long-term competitive implications
or the need to materially change its mode of conducting business as a result of
increased price transparency.
 
                                       55
<PAGE>   57
 
NEW ACCOUNTING STANDARDS
 
     In June 1997, the Financial Accounting Standards Board issued Statement No.
130, "Reporting Comprehensive Income," and Statement No. 131, "Disclosures about
Segments of an Enterprise and Related Information." Both Statements are
effective for fiscal years beginning after December 15, 1997, and are
disclosure-oriented statements. The Company adopted Statement No. 130 in the
first quarter of 1998 and the accompanying financial statements reflect
application of the provisions of this statement.
 
     The Company is required to adopt Statement No. 131 for its 1998 annual
report and disclose segment information on the same basis used internally for
evaluating segment performance and deciding how to allocate resources to
segments. The Company is currently assessing the effect of the new disclosure;
however, the Company believes adoption of Statement No. 131 will have no
financial impact on the Company.
 
     In February 1998, the Financial Accounting Standards Board issued Statement
No. 132, "Employers' Disclosure About Pension and Other Postretirement Benefits"
which revised disclosure requirements for pension and other postretirement
benefits. It does not affect the measurement of the expense of the Company's
pension and other postretirement benefits. The Company is required to adopt this
Statement for the 1998 Annual Report and is currently assessing the effect of
the new disclosures.
 
     In June 1998, the Financial Accounting Standards Board issued Statement No.
133, "Accounting for Derivative Instruments and Hedging Activities" which
requires that companies recognize all derivatives as either assets or
liabilities in the balance sheet and measure those instruments at fair value.
The Company is required to adopt this Statement by the first quarter of 2000 and
is currently assessing the effect of the new standard.
 
     Statement No. 133 provides, if certain conditions are met, that a
derivative may be specifically designated as (1) a hedge of the exposure to
changes in the fair value of a recognized asset or liability or an unrecognized
firm commitment (fair value hedge), (2) a hedge of the exposure to variable cash
flows of a forecasted transaction (cash flow hedge) or (3) a hedge of the
foreign currency exposure of a net investment in a foreign operation, an
unrecognized firm commitment, an available-for-sale security or a
foreign-currency-denominated forecasted transaction (foreign currency hedge).
 
   
     Under Statement No. 133, the accounting for changes in fair value of a
derivative depends on its intended use and designation. For a fair value hedge,
the gain or loss is recognized in earnings in the period of change together with
the offsetting loss or gain on the hedged item. For a cash flow hedge, the
effective portion of the derivative's gain or loss is initially reported as a
component of other comprehensive income and subsequently reclassified into
earnings when the forecasted transaction affects earnings. For a foreign
currency hedge, the gain or loss is reported in other comprehensive income as
part of the cumulative translation adjustment. For all other items not
designated as hedging instruments, the gain or loss is recognized in earnings in
the period of change.
    
   
    
 
                                       56
<PAGE>   58
 
                                    BUSINESS
 
GENERAL
 
     Conoco, a major, integrated, international energy company, is involved in
both the Upstream and Downstream segments of the petroleum business. Upstream
activities include exploring for, and developing, producing and selling, crude
oil, natural gas and natural gas liquids. Downstream activities include refining
crude oil and other feedstocks into petroleum products, buying and selling crude
oil and refined products and transporting, distributing and marketing petroleum
products. The Company operates in 40 countries worldwide.
 
   
     As of December 31, 1997, Conoco had proved worldwide reserves of 2.6
billion BOE, 38 percent of which were natural gas. Based on 1997 annual
production of 209 million BOE (excluding natural gas liquids from gas plant
ownership), the Company had a reserve life of 12.4 years as of December 31,
1997. Over the last five years, Conoco has replaced an average of 190 percent of
the oil and gas it has produced each year. Conoco owns or has equity interests
in nine refineries worldwide, with a total crude and condensate processing
capacity of approximately 799,000 barrels per day (including the new Melaka
refinery in Malaysia, which Conoco expects will be completed in the fourth
quarter of 1998). The Company has a marketing network of approximately 7,900
outlets in the United States, Europe and Asia. Based on public filings, for the
year ended December 31, 1997, Conoco ranked eighth in the worldwide production
of petroleum liquids by U.S.-based companies, eleventh in the production of
natural gas, and eighth in refining throughput. For that same period, Conoco
reported net income of $1,097 million on total revenues of $26.3 billion.
    
 
COMPANY HISTORY
 
     The Company was founded in 1875 in Ogden, Utah, as the Continental Oil and
Transportation Company. In 1885, it was reincorporated with a new name,
Continental Oil Company, as part of the nationwide Standard Oil Trust. In its
early years, its principal operations were marketing oil and petroleum related
products, primarily in the Rocky Mountain area and in California. In 1913, two
years after the U.S. Supreme Court dissolved the Standard Oil Trust, the Company
was again independently incorporated. From 1913 to 1929, the Company evolved
into a fully integrated oil company, with operations in most states west of the
Mississippi River.
 
     By 1929, Conoco had approximately 1,800 producing wells and had become one
of the largest retailers of gasoline in the Rocky Mountain area. In that year it
merged with the Marland Oil Company, an oil and gas company with wells and
marketing operations from Oklahoma to Maryland. After World War II, the Company
was an early participant in Gulf of Mexico exploration and production activities
and moved aggressively overseas with Upstream assets in many parts of the world
and Downstream assets in Western Europe. In 1981, Conoco was acquired by DuPont.
 
UPSTREAM
 
     SUMMARY
 
     Conoco is currently exploring for, developing or producing crude oil,
natural gas and/or natural gas liquids in 18 countries around the world. In
1997, production averaged 654,000 BOE per day, consisting of 453,000 barrels of
petroleum liquids (including natural gas liquids from gas plant ownership) and
1.2 billion cubic feet of natural gas per day. The bulk of this production came
from fields located in the United States, the United Kingdom and Norway, with
the remaining production coming from operations in Canada, the United Arab
Emirates, Indonesia, Nigeria and Russia.
 
     In 1997, Conoco replaced nearly 450 percent of the oil and natural gas it
produced, adding 938 million BOE to the Company's worldwide proved reserves,
while producing 209 million BOE (excluding natural gas liquids from gas plant
ownership), for a net addition of 729 million BOE. A large part of the reserve
increase reflected the recording of 680 million barrels of proved oil reserves
for the Company's interest in Petrozuata. Excluding the recording of the
Petrozuata reserves, Conoco replaced approximately 123 percent of its 1997
 
                                       57
<PAGE>   59
 
production. On December 31, 1997, the Company had proved reserves of 2.6 billion
BOE, consisting of 1,624 million barrels of petroleum liquids and 5,861 billion
cubic feet of natural gas, representing an increase of 58 percent on a BOE basis
since December 31, 1993.
 
     In recent years, Conoco has significantly increased capital expenditures
through participation in several large scale development projects. Conoco's
capital investment in Upstream activities in 1997 was $2.5 billion, including
approximately $0.9 billion for the Lobo Acquisition and $171 million for the
continued development of Britannia. The Company expects to make Upstream capital
investments in 1998 of approximately $1.8 billion, the largest of which will be
made in continued development of the Lobo trend, Britannia, Ursa and Petrozuata.
The Company believes that all of these projects will contribute to Conoco's 1999
production and significantly increase Conoco's production rates over current
levels in future years.
 
     The majority of Conoco's exploration and production assets are located in
North America (United States and Canada) and Western Europe (United Kingdom and
Norway). The producing properties in these areas generate cash to fund growth
opportunities around the world. Outside of North America and Western Europe,
Conoco's investment activities are focused on areas that have the potential to
become major business areas in the future, such as Northern South America and
the Caribbean, and the Asia Pacific, Middle East and Russia/Caspian Sea regions.
Conoco is exploring for oil and/or natural gas in 16 countries. Since 1996,
Conoco has pursued and continues to implement an exploration strategy focused on
acquiring large acreage positions in areas that are relatively under-explored.
The purpose of these acreage acquisitions has been to establish Conoco at an
early stage in areas that have the potential for large discoveries. Since 1996,
Conoco has acquired significant acreage positions in the deepwater Gulf of
Mexico, the Atlantic Margin of Northwest Europe, Northern South America and the
Caribbean, and selected basins in the Asia Pacific region. Conoco has applied 3D
seismic and other technologies to evaluate this acreage, and has recently begun
drilling programs to test the potential of this acreage.
 
   
     The following table sets forth certain information regarding the Company's
producing properties.
    
 
   
<TABLE>
<CAPTION>
                                                                PROVED RESERVES
                                                                     AS OF                 1997
                                                               DECEMBER 31, 1997        PRODUCTION
                REGION                   NATURE OF INTEREST       (MMBOE)(1)        (MMBOE PER DAY)(1)
                ------                   ------------------    -----------------    ------------------
<S>                                      <C>                   <C>                  <C>
NORTH AMERICA
  Lobo................................   lease                         113                  38
  Gulf of Mexico (including Ursa).....   lease                          89                  36
  San Juan Basin......................   lease                         174                  51
  Permian Basin.......................   lease                         159                  33
  Canadian Foothills..................   lease                          10                   2
  Central Appalachian Basin...........   partnership                    62                   3
  Other...............................                                 146                  58
                                                                     -----                 ---
          Total North America:........                                 753                 221
WESTERN EUROPE
  Britannia...........................   license                       237                  --
  Heidrun.............................   license                       150                  43
  Statfjord...........................   license                       108                  68
  Troll...............................   license                       125                   8
  Other...............................                                 311                 129
                                                                     -----                 ---
          Total Western Europe........                                 931                 248
NORTHERN SOUTH AMERICA AND THE
  CARIBBEAN
  Petrozuata..........................   equity company                680                  --
OTHER.................................                                 237                 106
                                                                     -----                 ---
Total.................................                               2,601                 575
                                                                     =====                 ===
</TABLE>
    
 
- ---------------
 
   
(1) Includes crude oil, condensate, and NGLs expected to be removed for the
    Company's account from its natural gas production. Average daily production
    excludes NGLs of 79 Mbbls acquired through gas plant ownership.
    
 
                                       58
<PAGE>   60
 
     NORTH AMERICA
 
     Production operations in North America are principally located in the Lobo
trend in South Texas, the Gulf of Mexico, the San Juan Basin in New Mexico, the
Permian Basin in West Texas, the foothills east of the Canadian Rockies and the
Central Appalachian Basin in Virginia. In 1997, North American operations
contributed approximately 24 percent of the Company's worldwide petroleum
liquids production and 64 percent of its worldwide natural gas production.
Proved North American reserves as of December 31, 1997, were 753 million BOE,
consisting of 286 million barrels of petroleum liquids and 2,801 billion cubic
feet of natural gas.
 
     In recent years, Conoco has consolidated its exploration and production
operations in North America in order to increase profitability. Conoco sold
hundreds of smaller, less efficient properties, while acquiring an increased
interest in the Company's largest producing areas such as the San Juan Basin and
the Lobo trend. As a result, Conoco has reduced the number of fields in its
portfolio from approximately 700 in 1990 to 136 as of June 30, 1998, while
maintaining production essentially constant on a BOE basis. The Company has also
focused its exploration activities by reducing the number of exploration plays
being pursued in North America from over 30 in 1995 to less than 10 as of June
30, 1998. Exploration activity in North America is concentrated in the deepwater
Gulf of Mexico, the Permian Basin in West Texas, the San Juan Basin in New
Mexico and the foothills of the Canadian Rockies.
 
     Over the near term, the Company's objectives are to maintain existing
production from current North American assets, while increasing production from
new wells in the Lobo trend and the deepwater Gulf of Mexico, widening its
exploration activities in the foothills of the Canadian Rockies and focusing on
its natural gas processing capabilities.
 
     Lobo Trend in South Texas
 
     Conoco is the largest natural gas producer in the Lobo trend, and a leading
producer, marketer and transporter of natural gas in South Texas. Conoco has 20
years of operating and drilling experience in the Lobo trend and currently holds
approximately 450,000 acres in the area under oil and gas leases. In 1997, in
accordance with its strategy to rapidly increase production through
participation in large development projects, the Company substantially increased
its holdings in South Texas as the result of the Lobo Acquisition. Assets
acquired by Conoco in this transaction included approximately 215,000 acres of
leases, 800 wells and 1,150 miles of natural gas gathering and transportation
pipeline, providing direct access to major Texas intrastate and interstate
pipeline systems. As a result of the Lobo Acquisition, Conoco is currently the
third largest natural gas producer in Texas.
 
     Conoco's average working interest in its leases in the Lobo trend is 92
percent. A large number of the producing wells acquired in the Lobo Acquisition
were acquired subject to volumetric production payments. The holders of these
production payments are entitled to a specific volume of production from these
wells (averaging approximately 91 million cubic feet per day in 1998) until the
last of the production payments terminate in 2002.
 
     With most of the Company's expanded Lobo holdings still undeveloped, the
Company has significantly increased drilling activity and, as of June 30, 1998,
had 14 rigs working continuously in the region. This development activity has
resulted in an increase in gross natural gas production in the region from
approximately 450 million cubic feet per day as of June 30, 1997 to
approximately 700 million cubic feet per day as of June 30, 1998. The Company
anticipates spending $1 billion between 1997 and 2002 to further develop its
leases in the Lobo trend. The Company's 1998 Lobo trend development program
includes the acquisition of new 3D seismic data and the drilling of over 200
wells.
 
     Lobo Pipeline Company, a wholly owned subsidiary of the Company, owns a
1,150 mile intrastate natural gas pipeline system in South Texas (the "Lobo
Pipeline") and expects to implement an expansion plan designed to provide
transportation for the Company's gas production and that of third party
producers, laying 100 miles of pipeline per year for the next five years. During
the first two years, most of the pipeline added will be high-pressure trunklines
to support regional development.
 
                                       59
<PAGE>   61
 
     Gulf of Mexico
 
     Conoco's current portfolio of producing properties in the Gulf of Mexico
includes approximately 10 fields operated by the Company and 16 operated by
other companies. The properties are in various stages of development, ranging
from properties that are fully developed to ones with considerable additional
development potential. The Company also holds interests in various offshore
platforms, pipelines and other infrastructure.
 
     Conoco currently has 11 leases in production or under development in the
deepwater Gulf of Mexico. The Company's most important current development
project in the Gulf of Mexico is the Ursa field development. Ursa, operated by
Shell, is one of the largest discoveries to date in the deepwater Gulf of
Mexico. The Company holds a 16 percent interest in the field, along with Shell
(45 percent), British Petroleum (23 percent) and Exxon (16 percent). The Company
expects the Ursa tension leg platform to be installed by early 1999 in
approximately 3,800 feet of water, with first production scheduled for mid-1999.
The Company projects that peak gross production from the Ursa field will reach
150,000 barrels of petroleum liquids and 400 million cubic feet of gas per day.
 
     Conoco's most important exploration program in North America is in the
deepwater Gulf of Mexico. Conoco is the seventh largest deepwater leaseholder in
the Gulf, with interests in 271 leases. Conoco has a 100 percent interest in 130
of these leases, and jointly owns 76 of the remaining leases on a 50-50 basis
with Shell. Since 1996, Conoco has acquired 3D seismic data over large portions
of the deepwater Gulf of Mexico to identify acreage to lease and to select
prospects for drilling. Seismic interpretation is now underway on many leases
and preparations for a multi-well drilling program are being made.
 
     Conoco will carry out its deepwater Gulf of Mexico drilling program in
large part with one of two highly sophisticated deepwater drillships that are
being constructed for joint ventures between Conoco and R&B Falcon Corporation.
The Company expects the first of these vessels to be in service in late 1998,
when the Company expects to begin a five-year, $400 million drilling program in
the Gulf of Mexico. These drillships, which will be capable of drilling wells in
water depths of up to 10,000 feet, provide Conoco with the ability to explore in
areas that were previously inaccessible.
 
     Other U.S. Producing Properties
 
     Outside of South Texas and the Gulf of Mexico, Conoco's largest producing
properties in North America are located in the San Juan Basin of New Mexico, the
Permian Basin in West Texas and the Central Appalachian Basin in Virginia.
Conoco also has producing properties in the Williston Basin and the Hugoton
complex in the Oklahoma/Texas panhandle.
 
     Conoco has a significant acreage position in the San Juan Basin. Conoco's
average daily net production from the San Juan Basin in 1997 was approximately
13,600 barrels of petroleum liquids and 227 million cubic feet of natural gas.
Conoco will continue to consider potential acquisitions in this basin to take
advantage of synergies resulting from its large asset base and gas plant in the
area.
 
     Conoco has an interest in 29 fields in the Permian Basin, which is one of
the largest producing areas in North America. In the Permian Basin, the
Company's average daily net production in 1997 was approximately 25,800 barrels
of petroleum liquids and approximately 43 million cubic feet of gas. The Company
believes the use of 3D seismic technology, horizontal wells and other innovative
extraction technologies will allow Conoco to extend the productive life of many
of the mature fields in the Permian Basin.
 
     Pocahontas Gas Partnership ("Pocahontas") is a 50/50 partnership between
the Company and DuPont's 50 percent-owned equity affiliate, Consolidation Coal
Company. Pocahontas produces and gathers coal bed methane ("CBM") prior to and
during coal mining operations in Virginia. The Company expects Pocahontas to
produce and gather approximately 38 million cubic feet per day of CBM from the
existing active mining area in 1998. The Company recently approved a major
expansion of the Pocahontas project to develop CBM outside of the existing
mining area. In the project, Pocahontas plans to drill approximately 800 wells
over 70,000 acres.
 
                                       60
<PAGE>   62
 
     Canadian Foothills
 
     Conoco has had significant exploration success in the 1990s in the
foothills east of the Canadian Rockies. In this area, Conoco has an interest in
202,000 net acres, much of which has yet to be developed. As part of the
Canadian foothills development, Conoco participated in the construction of a gas
processing plant in 1997. In addition to the discoveries in the foothills trend,
Conoco has a significant interest in the Peco Gas Field, located just east of
the foothills. Conoco also owns 100 percent of the Peco gas processing plant,
which processes gas from both the Peco Field and the Lovett River Field, another
one of Conoco's discoveries in the area.
 
     NATURAL GAS AND GAS PRODUCTS
 
     The Company ranked as the fourth largest producer of NGLs in the United
States in 1997. In the United States, the Company owns interests in 25 natural
gas processing plants located in Colorado, Louisiana, New Mexico, Oklahoma and
Texas as well as approximately 10,000 miles of gathering lines. Seventeen of the
plants are operated by the Company.
 
     The Company gathers natural gas, extracts the liquids and sells the
remaining residual gas. Most of the Company's raw gas liquids are supplied to
its processing operations, which further separate them into NGL products that
are used as feedstocks for gasoline and chemicals production. The Company
provides service to more than 800 natural gas producers and sells approximately
500 million cubic feet per day of residue gas to approximately 120 customers.
 
     The Company's share of total NGLs resulting from processing activities at
the 25 plants in which the Company owns an interest averaged 65,900 barrels per
day in 1997. In 1997, approximately 30,000 barrels per day of additional NGLs
were attributable to processing of the Company's natural gas liquids in
third-party-operated plants. In addition, the Company's 50 percent-owned equity
affiliate, C&L Processors Partnership, has five natural gas processing plants in
Oklahoma and Texas. The Company's pro rata share of C&L's NGL production was
approximately 7,500 barrels per day in 1997.
 
     The Company's other natural gas and gas products facilities in the United
States include the Lobo Pipeline, an 800-mile intrastate natural gas pipeline
system in Louisiana, natural gas and NGL pipelines in several other states,
three underground NGL storage facilities, a natural gas liquids fractionating
plant in Gallup, New Mexico with capacity of 19,000 barrels per day, and a 22.5
percent equity interest in Gulf Coast Fractionators, which owns a natural gas
liquids fractionating plant in Mt. Belvieu, Texas with capacity of 104,000
barrels per day.
 
     WESTERN EUROPE
 
     Conoco has a significant portfolio of producing properties in the United
Kingdom and Norway. Proved Western Europe reserves, as of December 31, 1997,
were 931 million BOE, consisting of 421 million barrels of petroleum liquids and
3,060 billion cubic feet of natural gas. In 1997, operations in Western Europe
contributed 46 percent of the Company's worldwide petroleum liquids production
and 36 percent of its natural gas production.
 
     Britannia Field
 
     Conoco has a 42 percent interest in the Britannia field, which is one of
the largest natural gas fields in the United Kingdom sector of the North Sea.
Britannia is a centerpiece of the Company's strategy to increase production and
reserves through large, long-lived projects. First production from Britannia
occurred in August 1998 and the Company estimates that the field will have a
production life of approximately 30 years. The Company's proved reserves at
Britannia include 1.1 trillion cubic feet of natural gas and 52 million barrels
of petroleum liquids at December 31, 1997. The Company believes Britannia has
the potential to produce between 650 and 740 million cubic feet of gas per day
(gross). Conoco and Chevron, the two largest interest holders in the field,
jointly operate Britannia.
 
                                       61
<PAGE>   63
 
     Southern North Sea Producing Properties
 
     Conoco has various equity interests in 12 producing gas fields in the
Southern North Sea, a major gas producing area on the United Kingdom continental
shelf. These fields mostly feed into the Conoco-operated Theddlethorpe gas
processing facility through three Conoco-operated pipeline systems (Viking,
LOGGS and CMS). In 1997, Conoco's net production from the Southern North Sea was
108 billion cubic feet of natural gas.
 
     Conoco believes there are additional development opportunities in the
Southern North Sea. One example is the Viking Phoenix project in which Conoco is
targeting the development of additional reserves using existing infrastructure
and new drilling and completion technology. The Company expects first production
from this development, for which Conoco's proved reserves were 174 billion cubic
feet of gas as of December 31, 1997, to occur by the end of 1998.
 
     Other United Kingdom Properties and Discoveries
 
     Conoco also has interests in the Miller (30 percent), Alba (12 percent),
Statfjord (4.8 percent in the United Kingdom/10.3 percent in the Norwegian
sector), MacCulloch (40 percent), and Banff (32 percent) fields, and the Clair
discovery (21 percent). Conoco operates the MacCulloch and Banff fields, both of
which will employ innovative floating production, storage and offtake
technology. British Petroleum operates the Miller field and the Clair discovery,
which is one of the largest undeveloped oil discoveries in Western Europe.
 
     Interconnector Pipeline and Gas Sales
 
     The Interconnector pipeline, which connects the United Kingdom and Belgium,
will facilitate marketing throughout Europe of the natural gas the Company
produces in the United Kingdom. The pipeline was installed in 1997, and is
expected to commence operation in October 1998. The Company has a 10 percent
interest in the $700 million project.
 
     Norwegian Producing Fields
 
     Conoco is the sixth largest oil producer in Norway. The Company has an
ownership interest in three of the largest fields in the country, Heidrun,
Statfjord and Troll. Conoco also has an interest in the Oseberg South (7.7
percent), Visund (9.1 percent), Jotun (3.75 percent), and Huldra (23.3 percent)
discoveries, which are in development, as well as the PL 203 (20 percent)
discovery.
 
     Production from the Heidrun field began in 1995 and is currently averaging
205,000 barrels of petroleum liquids per day (gross). Conoco's share of the
proved reserves in the field, based on its 18.125 percent equity interest, is
123 million barrels of petroleum liquids and 164 billion cubic feet of natural
gas. Conoco was the operator for the construction and installation of Heidrun's
tension leg platform. Upon first production, Statoil assumed operatorship in
accordance with a pre-agreed arrangement. Associated gas from the Heidrun Field
serves as feedstock for a methanol plant that became operational in Norway in
1997. The plant, in which the Company holds an 18.125 percent interest, is
operated by Statoil.
 
     Proved reserves from the Statfjord field have increased substantially over
the last five years as field performance has exceeded projections. Conoco, which
holds 10.3 and 4.8 percent interests in the Norwegian and United Kingdom sectors
of the field, respectively, had net proved reserves of 84 million barrels of
petroleum liquids and 142 billion cubic feet of natural gas in the field as of
December 31, 1997 (total for Norway and the United Kingdom). Conoco is
supporting work by Statoil, the operator of Statfjord, to determine ways to slow
the natural decline of the field, and increase reserves. The Company also owns a
1.66 percent interest in the Troll gas field, operated by Statoil, and has net
proved reserves in the field of 634 billion cubic feet of natural gas and 20
million barrels of petroleum liquids.
 
     Exploration -- The Atlantic Margin
 
     Exploration activity in Western Europe is focused on the deepwater Atlantic
Margin fairway, which runs from the Voring Basin off the coast of Norway to the
Porcupine Basin off of the west coast of Ireland. Along
                                       62
<PAGE>   64
 
   
the Atlantic Margin, Conoco has significant acreage positions in the Voring
Basin, the West of Shetlands and North Rockall Trough areas in the United
Kingdom and the Porcupine Basin. In 1997, the British government awarded Conoco
and three partners exploration licenses for two highly sought after deepwater
blocks, Blocks 204/14 and 204/15, in the West of Shetlands area. These blocks
are adjacent to a discovery in British Petroleum-operated Block 204/19. Conoco,
as operator of Blocks 204/14 and 204/15, has drilled and is evaluating one well
to test the potential of this acreage and expects to drill a second well in
1998.
    
 
     NORTHERN SOUTH AMERICA AND THE CARIBBEAN
 
     Petrozuata
 
     Petrozuata is a key component of Conoco's strategy to increase production
and reserves through implementation of long-lived, large development projects
and to utilize its proprietary coking technology in other areas of its business.
Petrozuata is a joint venture between the Company, which holds a 50.1 percent
non-controlling equity interest (subject to an option held by the Venezuelan
investment entity SOFIP to purchase one percent of the joint venture from Conoco
that expires May 31, 1999), and PDVSA Petroleo y Gas S.A., a subsidiary of
PDVSA, which holds the remaining interest. Petrozuata, the first venture of its
kind in Venezuela, is developing an integrated operation to produce extra heavy
crude oil from known reserves in the Zuata region of the Orinoco Belt, transport
it to the Jose industrial complex on the north coast of Venezuela and upgrade it
into Synthetic Crude, with associated by-products of liquified petroleum gas,
sulfur, petroleum coke and heavy gas oil. Conoco's recorded proved reserves
relating to its interest in this project as of December 31, 1997 were 680
million barrels of oil. Drilling began in 1997 and currently approximately 50
horizontal wells are in various stages of development, with another 37 wells
planned by year-end 1999. The joint venture agreement has a 35-year term and
requires approval of both Conoco and PDVSA Petroleo y Gas S.A. for major
Petrozuata decisions.
 
     The upgrading facility, which will employ the Company's proprietary delayed
coking technology, is currently under construction. The upgrader will be located
at Jose and is projected to become operational in 2000. Diluted extra-heavy
crude oil will be transported via a 36-inch pipeline from the field to the Jose
industrial complex. An adjacent 20-inch pipeline will return naphtha from the
upgrader to the field for use as a diluent. Petrozuata has also begun
construction of field processing and support facilities and marine facilities
for shipping Synthetic Crude and by-products.
 
   
     Petrozuata began producing extra heavy crude oil in August 1998, and the
Company expects that Petrozuata's production will rise to 120,000 barrels
(gross) daily by the time the project's upgrading facility becomes operational.
Prior to completion of the upgrader, the extra heavy crude will be blended with
lighter oils and sold on world markets. Following completion of the upgrader,
the Synthetic Crude produced by Petrozuata will either be used as a feedstock
for the Company's Lake Charles refinery and a refinery operated by PDVSA, or
will be sold to third parties. The Company has entered into an agreement to
purchase up to 104,000 barrels per day of the Petrozuata Synthetic Crude for a
formula price over the term of the joint venture if Petrozuata is unable to sell
the production to third parties for higher prices. All Synthetic Crude sales
will be denominated in United States dollars. By-products produced by the
upgrader (principally coke and sulfur) will be sold to a variety of domestic and
foreign purchasers. The loading facilities at Jose will transfer Synthetic Crude
and some of the by-products to ocean tankers for export. Synthetic Crude sales
are expected to comprise more than 90 percent of the project's revenues.
    
 
     The La Luna Trend
 
     Exploration activity in Northern South America and the Caribbean is focused
on a geologic trend known as La Luna. In Venezuela, the Company conducted
seismic surveys in 1997 on the shallow water Gulf of Paria West block, located
between Venezuela and Trinidad, and on the Guanare block in the Merida Andes
foothills. The Company expects to begin drilling of prospects on these blocks in
1998. Conoco currently holds a 50 percent working interest in both the Gulf of
Paria West block, which it operates, and the Guanare block, which is operated by
Elf (in each case subject to dilution to 32.5 percent at the option of a PDVSA
affiliate).
 
                                       63
<PAGE>   65
 
   
     In northwestern Colombia, seismic surveys have been completed in
partnership with Texaco on three tracts that Conoco acquired through a 50
percent farm-in. In 1998, Texaco has drilled two wells on the acreage (one
non-commercial discovery and one dry hole) and plans one additional well before
year-end. In addition, Conoco and Texaco recently acquired a fourth tract in a
joint bid.
    
 
     In 1997, Conoco signed a production sharing contract for Blocks 4a and 4b,
two large, prospective blocks off Trinidad's east coast. A 3D seismic survey was
acquired over the acreage in 1997, and the Company expects to commence drilling
in late 1998 or early 1999. Conoco is operator of both blocks and has a 50
percent working interest, as does Texaco.
 
     Seeking additional attractive opportunities in the La Luna Trend, Conoco
has conducted a two-year study of the hydrocarbon potential of the entire
offshore Barbados area. Encouraged by the study, Conoco has entered into a
commitment to acquire seismic data over 50 percent of the original study area
and has the option to enter a drilling program to test the potential of this
largely unexplored area.
 
     Phoenix Park
 
     The Company holds a 39 percent interest in Phoenix Park Gas Processors
Limited ("Phoenix Park"), a joint venture with the National Gas Company of
Trinidad and Tobago Limited, that processes and markets gas products in
Trinidad. Phoenix Park owns a gas processing plant, a fractionator producing
propane, mixed butane and natural gasoline, storage tanks and a liquefied
petroleum gas marine loading dock. These facilities produce over 13,000 barrels
per day (gross) of NGLs. Phoenix Park is currently implementing a significant
expansion of its facilities.
 
     ASIA PACIFIC
 
     The Company has a 30-year operating history in Indonesia. The focus of
Conoco's effort in the Asia Pacific region is the Company's operations in the
Indonesian sector of the Natuna Sea. In this area, Conoco is the operator of the
Block B and North West Natuna production sharing contracts ("PSCs").
 
     West Natuna Gas Project
 
     Conoco, as operator of the South Natuna Sea Block B PSC, along with the
other participants in Block B and the interest holders in the Block A and Kakap
PSCs, have formed the "West Natuna Group", with the aim of jointly marketing gas
from the West Natuna Area. In April 1997, Pertamina, the Indonesian state-owned
oil and gas company, entered into an agreement with a consortium (led by
Sembawang in Singapore) (the "Singapore Group") pursuant to which the parties
intend to negotiate natural gas purchase and sale agreements for the sale by
Pertamina of natural gas from specified fields in the PSCs operated by the West
Natuna Group (the "West Natuna Gas Project"). Pertamina and the Singapore Group
have now finalized (but not executed) a gas sales agreement. The current term of
the proposed purchase agreement provides for gas deliveries to begin by
mid-2001. The gas would be used for industrial purposes, primarily in power
generation and petrochemical plants, in Singapore.
 
   
     For the project to proceed certain conditions must be satisfied, including
the completion of the design of a 463 kilometer 28-inch submarine pipeline to
transport the gas from the West Natuna Sea fields to Singapore, completion of
the tariff and offtake arrangements relating to the pipeline, agreement between
the West Natuna Group and Pertamina to gas supply and allocation terms, the
arrangement by the Singapore parties of offtake agreements for the gas, and the
extension of each of the PSCs. The Company has no control over the satisfaction
of these conditions, and there is no assurance that the conditions will be
satisfied or waived by the date required.
    
 
     Assuming satisfaction of the above stated conditions and successful
negotiation of natural gas agreements among Pertamina and the Singapore Group,
up to one trillion cubic feet of natural gas could be supplied from gas fields
in Block B to the Singapore Group under the letter agreement Pertamina has
signed. First gas deliveries could begin by mid-2001, and the Company believes
Block B's share of production could reach 140 million cubic feet of gas daily.
Until all conditions necessary for project approval are met, no proved reserves
will be attributed to Conoco's interest in the West Natuna Gas Project.
                                       64
<PAGE>   66
 
     Belida and Sembilang Fields, Indonesia
 
     Conoco holds a 40 percent interest in and serves as operator of the Belida
and Sembilang oil fields in the Block B PSC. An ongoing infill drilling program
in the Belida Field maintained gross production in the range of 90,000 barrels
per day in 1997.
 
     RUSSIA/CASPIAN SEA
 
   
     The Company holds a 50 percent direct (plus a 4.7 percent indirect
interest) ownership interest in Polar Lights Company ("Polar Lights"), a Russian
limited liability company established in January 1992. Polar Lights, the first
Russian-Western joint venture to develop a major new oil field, was established
to develop the Ardalin oil field discovered in 1988 by the Russian state
enterprise GP Arkhangelskgeologia. Ardalin is located in the Arctic tundra some
1,000 miles northeast of Moscow. As of December 31, 1997, Conoco's share of
proved reserves is 43 million barrels of petroleum liquids, with an additional
eight million barrels of net proved reserves at the adjacent oil fields -- Kolva
and Dusushev. Polar Lights started producing oil in August 1994 and gross
production has increased from an average 21,000 barrels per day in 1994 to
37,000 barrels per day as of June 30, 1998. Oil is transported through the
existing Russian pipeline system and is then exported or sold on the domestic
market.
    
 
     In March 1998, Conoco signed a memorandum of understanding with OAO Lukoil
("Lukoil"), Russia's largest oil company, to jointly study the development of
petroleum reserves in the 1.2-million-acre block known as the Northern
Territories in the Timan-Pechora region in Northern Russia, which includes the
large undeveloped Yuzhno Khilchuyu oil field. The memorandum of understanding
followed Lukoil's purchase in December 1997 of the controlling interest in OAO
Arkhangelskgeoldobycha (successor to GP Arkhangelskgeologia), the Company's
original partner in the Northern Territories.
 
     In July 1998, the Company acquired a 15.667 percent interest in OAO
Arkhangelskgeoldobycha for approximately $33 million. OAO Arkhangelskgeoldobycha
owns a 30 percent interest in Polar Lights.
 
     Conoco is also one of several foreign participants with Gazprom, the major
Russian gas company, in a project to assess the feasibility of developing
infrastructure and establishing a market for the extensive gas reserves believed
to be contained in the remote Shtokmanskoye field located in the Barents Sea.
 
     WEST AFRICA
 
   
     In 1997, Conoco, in partnership with Express Petroleum and Gas Company Ltd.
of Nigeria ("Express"), announced the production of first oil from the shallow
water Ukpokiti field, located offshore in the western Niger delta. Conoco
currently has a 90 percent revenue interest in the field. Total production from
the field is currently 20,000 barrels per day of oil, and Conoco's net proved
reserves as of December 31, 1997 were 13.2 million barrels of oil. Express
operates Ukpokiti with the Company providing technical and operational
assistance in the field's development. Field development included three remote
caisson-type structures, five wells, and the conversion of the Conoco VLCC
tanker "Independence" into a floating production and storage offtake vessel.
With a 1.7 million-barrel storage capacity, the vessel also serves as an export
terminal.
    
 
     In addition to the Company's interest in the Ukpokiti field, Conoco has a
47.5 percent working interest in the deepwater OPL 220 license off the coast of
Nigeria, which is operated by Conoco and encompasses 600,000 acres. The Company
has acquired a 3D seismic survey and drilled two wells on this license. The
first well, which was drilled in 1997, found only gas and was noncommercial. The
second well was drilled in 1998 and encountered both oil and gas-filled sands.
Conoco and its partner Exxon are currently evaluating results from this second
well so that a decision can be made as to the future work program for the block.
 
     MIDDLE EAST
 
     In Dubai, United Arab Emirates, Conoco has operated four fields since their
discovery between 1966 and 1973. Currently the Company is using horizontal
drilling techniques and advanced reservoir drainage technology to enhance the
efficiency of the offshore production operations and improve recovery rates.
 
                                       65
<PAGE>   67
 
     OIL AND NATURAL GAS RESERVES
 
   
     The Company's estimated proved reserves at December 31, 1997 were 2.6
billion BOE (consisting of 1,624 million barrels of oil and 5,861 billion cubic
feet of natural gas), up 39 percent from December 31, 1996. This increase
largely reflects reserves associated with the Company's equity interest in
Petrozuata.
    
 
     Oil and gas proved reserves cannot be measured precisely. Reserve estimates
are based on many factors related to reservoir performance which require
evaluation by engineers interpreting the available data, as well as price and
other economic factors. The reliability of these estimates at any point in time
depends on both the quality and quantity of the technical and economic data, the
production performance of the reservoirs as well as extensive engineering
judgment. Consequently, reserve estimates are subject to revision as additional
data become available during the producing life of a reservoir. When a
commercial reservoir is discovered, proved reserves are initially determined
based on limited data from the first well or wells. Subsequent data may better
define the extent of the reservoir and additional production performance, well
tests and engineering studies will likely improve the reliability of the reserve
estimate. See "Risk Factors -- Uncertainty of Estimates of Proved Reserves."
 
   
     At the request of the Company, DeGolyer and MacNaughton, independent
petroleum engineering consultants, has carried out an independent evaluation of
selected properties representing approximately 80 percent of the Company's
proved reserves based on present value at December 31, 1997. The results
obtained by DeGolyer and MacNaughton with respect to reserves at December 31,
1997 do not show significant differences from those reported by the Company.
DeGolyer and MacNaughton has delivered to the Company its summary letter report
describing its procedures and conclusions, a copy of which appears as Annex A
hereto. No major discovery or other favorable or adverse event has occurred
since December 31, 1997 that would cause a significant change in the estimated
proved reserves as of that date.
    
 
     The following table sets forth by region the Company's proved oil reserves
at year-end for the past five years:
 
<TABLE>
<CAPTION>
                                                                        DECEMBER 31,
                                                             ----------------------------------
                                                             1993   1994   1995   1996    1997
                                                             ----   ----   ----   ----   ------
                                                                   (MILLIONS OF BARRELS)
<S>                                                          <C>    <C>    <C>    <C>    <C>
PROVED OIL RESERVES(1)
COMBINED COMPANIES
United States..............................................  344    336    294    299       277
Europe.....................................................  390    394    408    413       421
Other regions..............................................  230    223    231    214       195
                                                             ---    ---    ---    ---    ------
          Worldwide........................................  964    953    933    926       893
SHARE OF EQUITY AFFILIATE RESERVES
Europe.....................................................   19     35     44     47        51
Other regions(2)...........................................   --     --     --     --       680
                                                             ---    ---    ---    ---    ------
          Total oil reserves...............................  983    988    977    973     1,624
                                                             ===    ===    ===    ===    ======
</TABLE>
 
- ---------------
 
(1) Oil reserves comprise crude oil, condensate and NGLs expected to be removed
    for the Company's account from its natural gas production.
 
(2) Represents the Company's equity share of the Petrozuata venture in
    Venezuela.
 
                                       66
<PAGE>   68
 
     The following table sets forth the Company's natural gas reserves at
year-end for the past five years by region:
 
<TABLE>
<CAPTION>
                                                                     DECEMBER 31,
                                                         -------------------------------------
                                                         1993    1994    1995    1996    1997
                                                         -----   -----   -----   -----   -----
                                                               (BILLIONS OF CUBIC FEET)
<S>                                                      <C>     <C>     <C>     <C>     <C>
PROVED NATURAL GAS RESERVES
COMBINED COMPANIES
United States..........................................  1,802   1,749   1,891   1,822   2,235
Europe.................................................  1,752   2,431   2,649   3,068   3,060
Other regions..........................................    126     150     169     173     196
                                                         -----   -----   -----   -----   -----
          Worldwide....................................  3,680   4,330   4,709   5,063   5,491
SHARE OF EQUITY AFFILIATE RESERVES
United States..........................................    291     344     339     333     370
                                                         -----   -----   -----   -----   -----
          Total natural gas reserves...................  3,971   4,674   5,048   5,396   5,861
                                                         =====   =====   =====   =====   =====
</TABLE>
 
     PRODUCTION DATA
 
     The Company's oil and natural gas production averaged 654,000 BOE per day
in 1997, compared with 656,000 BOE per day in 1996. As a percentage of total
production, natural gas production was 31 percent in 1997 and 1996.
 
     The table below shows the Company's interests in average daily oil
production and natural gas production for the past three years. Oil production
comprises crude oil and condensate produced for the Company's account, plus its
share of NGLs removed from natural gas production from owned leases and NGLs
acquired through gas plant ownership. Natural gas production represents the
Company's share of production from leases in which the Company has an ownership
interest.
 
<TABLE>
<CAPTION>
                                                              1995    1996    1997
                                                              -----   -----   -----
                                                              (THOUSANDS OF BARRELS
                                                                    PER DAY)
<S>                                                           <C>     <C>     <C>
AVERAGE DAILY OIL PRODUCTION
  COMBINED COMPANIES
     Crude Oil, Condensate, and Natural Gas Liquids from
      Owned Reserves:
       United States........................................     93      91      90
       Europe...............................................    143     182     176
       Other Regions........................................     98      88      92
                                                              -----   -----   -----
          Subtotal..........................................    334     361     358
     Natural Gas Liquids from Gas Plant Ownership:
       United States........................................     65      67      66
                                                              -----   -----   -----
          Total Production..................................    399     428     424
  SHARE OF EQUITY AFFILIATES
     Crude Oil, Condensate, and Natural Gas Liquids from
      Owned Reserves........................................     12      13      16
     Natural Gas Liquids from Gas Plant Ownership...........     13      13      13
                                                              -----   -----   -----
          Total Production Equity Affiliates................     25      26      29
                                                              -----   -----   -----
          Total Oil Production Per Day......................    424     454     453
                                                              =====   =====   =====
</TABLE>
 
                                       67
<PAGE>   69
 
<TABLE>
<CAPTION>
                                                               1995     1996     1997
                                                              ------   ------   ------
                                                              (MILLIONS OF CUBIC FEET
                                                                      PER DAY)
<S>                                                           <C>      <C>      <C>
AVERAGE DAILY NATURAL GAS PRODUCTION
  COMBINED COMPANIES
     Natural Gas from Owned Reserves:
       United States........................................    740      738      709
       Europe...............................................    341      416      432
       Other Regions........................................     31       41       46
                                                              -----    -----    -----
          Total Deliveries..................................  1,112    1,195    1,187
  SHARE OF EQUITY AFFILIATES
     Natural Gas from Owned Reserves:
       United States........................................     14       16       16
                                                              -----    -----    -----
          Total Natural Gas Production Per Day..............  1,126    1,211    1,203
                                                              =====    =====    =====
</TABLE>
 
     See pages F-33 and F-34 for the annual production volumes of oil (crude
oil, condensate and natural gas liquids) and natural gas from proved reserves.
Proved oil production volumes exclude natural gas liquids from plant ownership.
 
     PRODUCTION COST DATA
 
     The following table sets forth the Company's average production costs per
BOE produced, average sales prices per barrel of crude oil and condensate sold
and average sales prices per MCF of natural gas sold, for the three-year period
ended December 31, 1997.
 
<TABLE>
<CAPTION>
                                                             TOTAL     UNITED             OTHER
                                                           WORLDWIDE   STATES   EUROPE   REGIONS
                                                           ---------   ------   ------   -------
                                                                (UNITED STATES DOLLARS)(1)
<S>                                                        <C>         <C>      <C>      <C>
For the year ended December 31, 1997
  Average production costs per barrel of oil equivalent
     of petroleum produced(2)............................   $ 4.21     $ 4.23   $ 4.51   $ 3.40
  Average sales prices of produced petroleum(3)
     Per barrel of crude oil and condensate sold.........    18.58      17.93    18.93    18.35
     Per MCF of natural gas sold.........................     2.51       2.34     3.25     1.41
For the year ended December 31, 1996
  Average production costs per barrel of oil equivalent
     of petroleum produced(2)............................     3.84       4.11     4.13     2.50
  Average sales prices of produced petroleum(3) Per
     barrel of crude oil and condensate sold.............    20.11      18.68    20.94    19.47
     Per MCF of natural gas sold.........................     2.21       1.90     2.92     1.24
For the year ended December 31, 1995
  Average production costs per barrel of oil equivalent
     of petroleum produced(2)............................     3.92       3.78     4.82     2.49
  Average sales prices of produced petroleum(3) Per
     barrel of crude oil and condensate sold.............    16.52      15.53    16.95    16.56
     Per MCF of natural gas sold.........................     1.86       1.44     2.96     1.13
</TABLE>
 
- ---------------
(1) Excludes the Company's share of equity affiliates.
 
(2) Average production costs per barrel of equivalent liquids, with natural gas
    converted to liquids at a ratio of 6,000 cubic feet of gas to one barrel of
    liquid.
 
(3) Excludes proceeds from sales of interest in oil and gas properties.
 
                                       68
<PAGE>   70
 
     DRILLING AND PRODUCTIVE WELLS
 
     The following table sets forth the Company's drilling wells and productive
wells by region as of December 31, 1997.
 
<TABLE>
<CAPTION>
                                                               TOTAL     UNITED             OTHER
                                                             WORLDWIDE   STATES   EUROPE   REGIONS
                                                             ---------   ------   ------   -------
                                                                       (NUMBER OF WELLS)
<S>         <C>                                              <C>         <C>      <C>      <C>
Number of wells drilling(1)(3)
  Gross....................................................       33         15     13         5
  Net......................................................       14          9      3         2
Number of productive wells(2)(3)
  Oil
     wells  -- gross.......................................    7,761      7,173    278       310
            -- net.........................................    2,657      2,523     26       108
  Gas wells -- gross.......................................    8,749      8,486    169        94
            -- net.........................................    4,210      4,089     33        88
</TABLE>
 
- ---------------
 
(1) Includes wells being completed.
 
(2) Approximately 80 gross (27 net) oil wells and 757 gross (271 net) gas wells,
    all in the United States, have multiple completions.
 
(3) Excludes the Company's share of equity affiliates.
 
     DRILLING ACTIVITY
 
     The following table sets forth the Company's net exploratory and
development wells drilled by region for the three-year period ended December 31,
1997.
 
<TABLE>
<CAPTION>
                                                              TOTAL     UNITED             OTHER
                                                            WORLDWIDE   STATES   EUROPE   REGIONS
                                                            ---------   ------   ------   -------
                                                               (NUMBER OF NET WELLS COMPLETED)
<S>           <C>                                           <C>         <C>      <C>      <C>
For the year ended December 31, 1997(1)
  Exploratory -- productive...............................      7.1       3.7     1.6       1.8
              -- dry......................................     18.4      11.7     4.9       1.8
  Development -- productive...............................    142.6     126.9     5.4      10.3
              -- dry......................................     10.2       7.2     0.0       3.0
For the year ended December 31, 1996(1)
  Exploratory -- productive...............................     42.8       1.6     2.0      39.2
              -- dry......................................     20.5      10.3     4.0       6.2
  Development -- productive...............................     89.9      73.1     6.1      10.7
              -- dry......................................     17.3      13.5     0.3       3.5
For the year ended December 31, 1995(1)
  Exploratory -- productive...............................     34.2      12.8     1.4      20.0
              -- dry......................................     38.2      22.1     4.9      11.2
  Development -- productive...............................    109.5      94.3     8.0       7.2
              -- dry......................................     13.7      10.7     0.0       3.0
</TABLE>
 
- ---------------
 
(1) Excludes the Company's share of equity affiliates.
 
                                       69
<PAGE>   71
 
     DEVELOPED AND UNDEVELOPED PETROLEUM ACREAGE
 
     The following table sets forth the Company's developed and undeveloped
petroleum acreage by region as of December 31, 1997.
 
<TABLE>
<CAPTION>
                                                             TOTAL     UNITED             OTHER
                                                           WORLDWIDE   STATES   EUROPE   REGIONS
                                                           ---------   ------   ------   -------
                                                                   (THOUSANDS OF ACRES)
<S>                                                        <C>         <C>      <C>      <C>
Developed acreage(1)
  Gross..................................................      7,555   2,663    1,129      3,763
  Net....................................................      3,341   1,559      317      1,465
Undeveloped acreage(1)
  Gross..................................................    108,803   2,749    4,984    101,070
  Net....................................................     80,017   2,103    1,648     76,266
</TABLE>
 
- ---------------
 
(1) Excludes the Company's share of equity affiliates.
 
     The Company is not required to file, and has not filed on a recurring
basis, estimates of its total proved net oil and gas reserves with any U.S. or
non-U.S. governmental regulatory authority or agency other than the Department
of Energy (the "DOE") and the Securities and Exchange Commission (the
"Commission"). The estimates furnished to the DOE have been consistent with
those furnished to the Commission. They are not necessarily directly comparable,
however, due to special DOE reporting requirements such as requirements to
report in some instances on a gross, net or total operator basis, and
requirements to report in terms of smaller units. In no instance have the
estimates for the DOE differed by more than five percent from the corresponding
estimates reflected in total reserves reported to the Commission.
 
DOWNSTREAM
 
     SUMMARY
 
   
     Downstream operations encompass refining crude oil and other feedstocks
into petroleum products, buying and selling crude oil and refined products and
transporting, distributing and marketing petroleum products. Downstream
operations are organized regionally with operations in North America, Europe and
the Asia Pacific region. North American and European operations provided 60
percent and 46 percent, respectively, of total Downstream earnings in 1997,
partially offset by a small loss resulting from start-up activities in Asia
Pacific. Downstream's objective is to continue to provide an appropriate return
on investment by improving the competitiveness of the core business, while
providing free cash flow to fund growth in new Downstream businesses, as well as
elsewhere within the Company.
    
 
     Conoco has made capital investments in Downstream activities averaging
approximately $600 million per year for the last three years. 1998 capital
investments in Downstream activities are also expected to be approximately $600
million.
 
   
     Downstream's strengths are in processing heavy, high sulfur and acidic
crudes, upgrading bottom-of-the-barrel feedstocks via coking technology, running
low-cost, high-volume retail marketing operations and developing specialty
products. Approximately 50 percent of the Company's worldwide refining capacity
is designed to process heavy, high sulfur crude. The Humber refinery in the
United Kingdom can process about 44 percent acidic crudes in its crude slate.
The Company has applied its coking technology to nearly all of its refining
operations throughout the world. This has enabled the Company to become a world
leader in producing petroleum coke products, such as high-value graphite and
anode coke, which are used in the production of electrodes for the steel and
aluminum industries. Conoco has also licensed its fuel coking technology around
the world, which has in turn created other business development opportunities.
    
 
     The Company produces and markets a full range of refined petroleum
products, including gasolines, diesel fuels, heating oils, aviation fuels, heavy
fuel oils, asphalts, lubricants, petroleum coke products and petrochemical
feedstocks. The Company owns and operates, or is a partner in the operation of,
nine refineries worldwide with a total crude and condensate capacity of 799,000
barrels per calendar day (including the new
 
                                       70
<PAGE>   72
 
Melaka refinery, which Conoco expects will be completed in the fourth quarter of
1998). Upon completion of Melaka, refining capacity will be distributed 62
percent in the United States, 33 percent in Europe and five percent in the Asia
Pacific region. Capacity has risen by over 175,000 barrels per day, or 29
percent, since year end 1995 as a result of the expansion of the Lake Charles
refinery, the upgrade of the Humber refinery, and the acquisition of its
interest in two refineries in the Czech Republic. In the United States, the
Company primarily markets through low-cost wholesale operations. The Company has
a growing marketing presence in Europe and Asia Pacific, where it is a leader in
operating low-cost, high-volume retail stations. In the first half of 1998,
marketing sales averaged 984,000 barrels of refined product per day, distributed
67 percent, 32 percent and 1 percent in the United States, Europe and the Asia
Pacific region, respectively.
 
     NORTH AMERICA
 
     Conoco's four U.S. refineries are fully integrated, high conversion
facilities, with design capacity to process over 50 percent high sulfur crude
oils, much of which is also heavy crude. A principal factor affecting the
profitability of the Company's North American operations is the price of refined
products in relation to the cost of crude oils and other feedstocks processed.
Because the Company is able to process a relatively large portion of heavy, high
sulfur crude oil, the cost advantage of these crude oils (such as those from
Mexico, Venezuela and Canada) over lighter, low sulfur crude oils (such as West
Texas Intermediate) is particularly significant. Over half of Conoco's U.S.
refining capacity is located in inland markets and therefore benefits from the
price differential for products produced and sold inland versus those produced
and sold on the Gulf Coast.
 
     Integration of refining, transportation and marketing, and continuous
improvement initiatives, have resulted in increased profitability from
improvements in refinery reliability, utilization, product yield, and energy
usage. Since 1993, the Company has increased refining input at its four U.S.
refineries by 20 percent, while lowering average operating expenses by
approximately $1.70 per barrel of refinery input. The Company has improved
market share through geographic concentration of markets.
 
     The Company intends to limit ongoing capital investments in Downstream
North America to a level that is less than half of Downstream North America's
operating cash flow for ongoing capital expenditures, excluding large,
non-discretionary, regulatory-driven projects and selected growth projects.
Capital expenditures for North America were approximately $227 million in 1997
and are expected to decline to approximately $170 million in 1998, reflecting
the completion of major projects. The Company is positioned to make the
necessary clean fuels investments at its refineries over the next five years in
support of changing motor fuel specifications. The Company also plans to make
investments at the Lake Charles refinery to facilitate processing of Petrozuata
Synthetic Crude.
 
     Refining
 
     The Company operates four wholly owned refineries in the United States. The
following tables outline the rated crude and condensate distillation capacity as
of December 31 for each of the past five years, and the average daily crude,
condensate and other inputs for each of the past five years.
 
<TABLE>
<CAPTION>
                                                                      DECEMBER 31,
                                                            ---------------------------------
                                                            1993   1994   1995   1996    1997
                                                            ----   ----   ----   ----    ----
                                                             (THOUSANDS OF BARRELS PER DAY)
<S>                                                         <C>    <C>    <C>    <C>     <C>  <C>
REFINERY CRUDE AND CONDENSATE CAPACITY
Lake Charles, Louisiana...................................  175    182    191    226     226
Ponca City, Oklahoma......................................  140    140    150    155     155  (1)
Denver, Colorado..........................................   58     58     58     58      58
Billings, Montana.........................................   49     49     49     52      52
                                                            ---    ---    ---    ---     ---
          Total...........................................  422    429    448    491     491
                                                            ===    ===    ===    ===     ===
</TABLE>
 
- ---------------
 
(1) Subsequent to December 31, 1997, capacity has been upgraded to 160,000
    barrels per day.
 
                                       71
<PAGE>   73
 
<TABLE>
<CAPTION>
                                                                        DECEMBER 31,
                                                              --------------------------------
                                                              1993   1994   1995   1996   1997
                                                              ----   ----   ----   ----   ----
                                                               (THOUSANDS OF BARRELS PER DAY)
<S>                                                           <C>    <C>    <C>    <C>    <C>
REFINERY INPUTS(1)
  Lake Charles, Louisiana
     Crude and condensate(2)................................  165    183    179    177    211
     Other feedstocks.......................................   21     24     23     21     23
  Ponca City, Oklahoma
     Crude and condensate(2)................................  135    144    151    150    161
     Other feedstocks.......................................    3      2      5      2      2
  Denver, Colorado
     Crude and condensate(2)................................   46     47     49     49     53
     Other feedstocks.......................................    0      0      0      0      0
  Billings, Montana
     Crude and condensate(2)................................   45     48     45     51     51
     Other feedstocks.......................................    4      3      3      3      3
          Total crude and condensate........................  391    422    424    426    476
          Total other feedstocks............................   28     30     31     26     27
</TABLE>
 
- ---------------
 
(1) This table includes feedstocks in addition to crude and condensate on which
    rated capacity is based.
 
(2) This table includes actual crude and condensate runs, which may exceed rated
    capacity.
 
     The Company's U.S. consolidated refined product yields by volume in 1997
were 46 percent motor gasoline, 40 percent middle distillates, including jet and
diesel fuel, 4 percent residual fuel oil and asphalt and 10 percent other
products, including petroleum coke, lubricants and liquefied petroleum gases.
 
     Lake Charles Refinery and Related Facilities
 
     The Company's Lake Charles refinery, located in Westlake, Louisiana, has a
crude capacity of 226,000 barrels per day and processes both heavy, high sulfur
crude oil and low sulfur crude oil. The refinery's Gulf Coast location provides
access to numerous cost-effective domestic and international crude oil sources.
The crude design capacity is approximately 56,000 barrels per day of local,
domestically supplied low sulfur crudes, with the remaining 170,000 barrels per
day being heavy, high sulfur crudes. While the types and origins of these lower
priced, heavy, high sulfur crudes can vary, the majority consists of Venezuelan
and Mexican crudes delivered via tanker. The Lake Charles refinery products can
be delivered by truck, rail or into major common carrier products pipelines
partially owned by the Company which serve the Eastern and Mid-continent United
States. In addition, refinery products can be sold into export markets through
the refinery's marine terminal.
 
     The ability to refine both low-sulfur and heavy high sulfur crudes at the
Lake Charles refinery provides a competitive advantage to the Company by
enabling the refinery to produce from relatively low-cost feedstocks a full
range of products including LPG, gasolines, jet fuel, diesel fuel, petroleum
coke, lube oils and other specialty products. The refinery facilities include
fluid catalytic cracking, delayed coking and hydrodesulfurization units which
enable it to maximize the upgrade from the heavier crudes. A crude unit
expansion and a new catalytic reformer were completed in conjunction with the
Excel Paralubes project to take advantage of synergies generated between the two
facilities. The Company is making investments in the Lake Charles refinery so
that, in the future, it will be able to process Petrozuata Synthetic Crude.
 
     Integration of fuels and specialty products plays an important role in
maximizing product value at the refinery. Intermediates produced from low-sulfur
crude processing allow the refinery to supply the heaviest, highest boiling
range material in the crude to the Cit-Con lube plant (owned by a 35
percent-owned equity affiliate of Conoco) for base oils, finished lubes and wax
production. Other intermediates are exchanged with a neighboring chemical plant
complex for further processing.
 
                                       72
<PAGE>   74
 
     The refinery supplies high sulfur gas oil to Excel Paralubes (a 50/50 joint
venture between the Company and Pennzoil) which owns a hydrocracked lubricating
base oil facility. Excel Paralubes's state-of-the-art lube oil facility produces
nearly 17,000 barrels per day of high quality hydrocracked base oils,
representing approximately 10 percent of U.S. lubricating base oil production.
Hydrocracked base oils are second in quality only to synthetic base oils, but
are produced at a much lower cost. The refinery produces other specialty
intermediates for making solvents to supply the recently formed Penreco joint
venture company (also a joint venture with Pennzoil). Penreco manufactures and
markets highly refined specialty petroleum products for global markets.
 
     The Lake Charles facilities also include a specialty coker and calciner
that manufacture the more highly valued graphite and anode petroleum cokes for
the steel and aluminum industries, and provide a substantial increase in light
oils production by converting the heaviest part of the heavy high sulfur crude
barrel into diesel fuel and gasoline. In addition, green petroleum coke is
supplied to a nearby coke calcining venture.
 
     Ponca City Refinery
 
     The Company's refinery located in Ponca City, Oklahoma, recently increased
its crude capacity to 160,000 barrels per day of light, high sulfur and light,
low sulfur crudes. Both foreign and domestic crudes are delivered by pipeline
from offshore, Oklahoma, Kansas, and North and West Texas fields. Finished
products are shipped by truck, rail and Company-owned and common carrier
pipelines to markets throughout the Mid-continent region.
 
     The Ponca City refinery is a fully integrated, high-conversion facility
that produces a full range of products, including LPG, gasoline, jet fuel,
diesel and anode and fuel grade petroleum cokes. The refinery's facilities
include fluid catalytic cracking, delayed coking and hydrodesulfurization units
which enable it to produce high ratios of gasoline and diesel fuel from crude
oil.
 
     Denver Refinery
 
     The Company's Denver refinery, located in Commerce City, Colorado, has a
crude capacity of 58,000 barrels per day, processing a mixture of Canadian
heavy, high sulfur crudes, and domestic heavy, high sulfur crude oils and low
sulfur crude oils. Almost all crude oil processed at the refinery is transported
via pipeline. Products are delivered predominantly through a local truck loading
terminal to the east side of the Rockies but also by rail and pipelines to other
Colorado markets. The refined gasoline products from the Denver refinery help
supply the Company's marketing operations in the Rocky Mountain states.
 
     The Denver refinery is a fully integrated refinery that produces a full
range of products including gasolines, jet fuels, diesel and asphalt. The
refinery's upgrading units enable it to process a crude slate containing nearly
50 percent heavy, high sulfur crude. The Company has a processing agreement with
a refinery located in Cheyenne, Wyoming, that has coking capabilities from which
the refinery receives intermediate feedstocks for processing into finished
products. The Denver refinery also supplies KC Asphalt (a 50/50 joint venture
between the Company and Koch Industries) with high quality asphalt products.
Both of these ventures enable the Company to turn relatively low value
intermediates into higher margin products.
 
     Billings Refinery
 
     The Company's Billings, Montana refinery has a crude capacity of 52,000
barrels per day, processing a mixture of over 80 percent Canadian heavy, high
sulfur crude plus domestic high sulfur and low sulfur crude oils all delivered
by pipeline. Products from the refinery are delivered via Company-owned
pipelines, rail, and trucks, supplying the Company's extensive branded marketing
in Eastern Washington and the Northern Rocky Mountain states. The refinery's
proximity to its primary source of crude and its ability to refine both low
sulfur and heavy-sulfur crudes provide the Company with significant competitive
advantages.
 
     The Billings refinery is a fully integrated refinery that produces a full
range of products including gasolines, jet fuels, diesel and fuel grade
petroleum coke. The Billings refinery has a very high conversion rate and the
capability to process less expensive, very heavy high sulfur crudes. A delayed
coker converts heavy,
 
                                       73
<PAGE>   75
 
high sulfur resid into higher value light oils. A gas oil hydrotreating unit and
hydrogen plant improve the light oil production yields and remove the additional
sulfur contained in these heavy, high sulfur crudes.
 
     Marketing
 
     In the United States, the Company markets gasoline, utilizing the Conoco
brand, in 33 states (20 of which represent primary markets), in the Southeast,
Mid-continent and Rocky Mountain regions. Market growth continues to be targeted
to those areas where the Company can obtain a strong market share and
geographical areas that leverage supply from the U.S. refineries and
distribution systems in which the Company has an ownership position. Increasing
operating market share has resulted in particularly strong brand recognition in
the Rocky Mountain and Mid-continent markets.
 
     Conoco branded gasoline is sold through approximately 4,900 branded
stations in the United States, 84 percent through retail outlets owned by
independent wholesale marketers and 16 percent through 295 Company-owned stores
at year end 1997. The Company markets gasoline primarily through the wholesale
channel in the United States because it requires a lower capital investment than
retail but still provides a secure, branded outlet for the Company's products.
The Company also operates retail stations to establish brand standards and image
as well as to better understand the independent distributors in order to provide
programs and services to them and to the consumer. Building on this knowledge,
the Company has recently introduced "breakplace(R)," a new concept in
convenience store design. This new format, involving the complete redesign of an
outlet's exterior and interior, is designed to increase the frequency and
transaction size of customer visits by catering to the needs of the "convenience
connoisseur." There were 21 breakplace(R) locations as of May 31, 1998, and the
Company is licensing the trademark to marketers. Many more stores in the network
have adopted comprehensive offerings patterned after the format, thereby
supporting wholesale marketing and elevating the Company's brand perception to
the consumer.
 
     At year-end 1997, CFJ Properties, a 50/50 joint venture between the Company
and Flying J, owned and operated 78 truck travel plazas that carry both the
Conoco and Flying J brands and provide a secure outlet for the Company's diesel
production. In addition, bulk sales of all refined petroleum products are made
to commercial, industrial and spot market customers.
 
     Transportation
 
     Conoco has approximately 6,500 miles of crude and product mainline
pipelines in the United States, including those partially owned and/or operated
by affiliates. The Company also owns and operates 37 finished product terminals,
six liquified petroleum gas terminals, one crude terminal and one coke-exporting
facility. The Company's crude pipeline interests and terminals provide integral
logistical links between crude sources and refineries to lower crude costs. The
product pipelines serve as secure links between refineries and key products
markets. In 1997, the Company had a 87 percent utilization rate in its pipelines
and a 68 percent utilization in its crude/product terminals. The Company has
historically had one of the highest pipeline utilization rates in industry
benchmarking studies. The Company's U.S. pipeline system transported an average
of 914,000 barrels per day in 1997. The Company's equity share of shipments on
affiliate pipelines was an additional 363,000 barrels per day.
 
     The Company currently operates a fleet of seven crude oil tankers,
principally of Liberian registry, including five double hulled tankers. By the
end of 1998, the Company plans to operate a 100 percent double-hulled tanker
fleet in United States waters. Four vessels are used to provide secure
transportation to the Lake Charles refinery, two others are in use in the Asia
Pacific market and another is on lease to a third party for use as a shuttle
tanker for the Heidrun field in the North Sea, in which Conoco has an interest.
An eighth vessel is being used as a floating production storage and offtake
vessel off the coast of Nigeria. Two additional double-hulled tankers are
currently under construction and will be joining the fleet in the Gulf of Mexico
in 1999.
 
                                       74
<PAGE>   76
 
     EUROPE
 
     The Company's European refining and marketing activities include operations
in 17 countries, primarily in the United Kingdom and Germany. These two markets
accounted for 72 percent of the assets and 92 percent of the Company's European
Downstream after-tax earnings in 1997. The Company also has marketing operations
in Austria, Belgium, Denmark, Finland, France, Luxembourg, Norway, Sweden, and
Switzerland. More recently it has entered the faster growing markets of the
Czech Republic, Hungary, Poland, Slovakia, Spain and Turkey. The marketing
operations in Central and Eastern Europe and Turkey are complemented by a
minority interest in two refineries in the Czech Republic.
 
     The Company's European Downstream strategy has been to operate low cost,
high volume retail outlets in selected key markets where the Company has a
competitive advantage, pursue opportunities in growth regions, and maintain its
Humber refinery and the MiRO joint venture refinery, in the United Kingdom and
Germany, respectively, as top performers in Europe. The Company plans to
redirect cash generated in its mature European businesses to other parts of
Upstream and Downstream operations and to the identified European growth
markets.
 
     The Company has invested an average of $232 million per year over the past
five years in its Downstream European operations and expects to invest a similar
amount in 1998. The Company continues to implement relatively low-cost projects
in its refining operations designed to increase production and yields, while
reducing feedstock costs and operating expenses. The Company plans to continue
to direct capital expenditures for marketing operations, which are expected to
be approximately 50 percent of the European Downstream total capital
expenditures, toward construction of new stations in growth markets, primarily
in Central and Eastern Europe, but also in its areas of competitive strength in
Germany, Austria and the Nordic countries.
 
     The Company's European Downstream profitability is affected by several
factors. As with all refining operations, the difference between the market
price of refined products and the cost of crude oil is the major factor. The
Company has strengths in its European refineries because it is able to process
lower cost crudes or upgrade other feedstocks into high value finished products.
In addition, since the United Kingdom refinery also processes fuel oil as a
feedstock, the price difference between low sulfur fuel oil and finished
products is important to earnings. European operations also include significant
retail marketing volumes and therefore earnings are driven by retail margins,
fuel and convenience product sales and operating expenses in the various
countries where the Company operates.
 
     Refining
 
   
     The Company's principal European refining operations are located in the
United Kingdom, Germany, and the Czech Republic. Since early 1996, the expansion
of the Company's Humber refinery in the United Kingdom, the formation of the
MiRO joint venture through consolidation with a neighboring German refinery and
the purchase of a share in a joint venture owning two Czech Republic refineries
have increased the Company's European crude refining capacity by approximately
52 percent (90,000 barrels per day). The Company has continuously upgraded its
refineries in Europe since the early 1990s and the configuration and output of
its refineries are two of the Company's primary sources of competitive
advantage. In 1996, the United Kingdom and German refineries ranked in the first
quartile of Western European refineries for financial and operating performance
(in the net margin, return on investment, processing efficiency and volumetric
expansion categories) as ranked by Solomon Associates, an independent
benchmarking company.
    
 
     The Company has undertaken a major capital investment program totaling $449
million from 1993 through 1997 to process lower cost feedstocks and increase
conversion capacity, product quality and energy efficiency at the Humber
refinery. The Company plans to make approximately $46 million in capital
expenditures at the refinery in 1998 in order to continue to improve reliability
and efficiency. The Company is also participating in upgrading projects at its
joint venture owned refineries in Germany and the Czech Republic. In addition,
the Company intends to continue to invest to ensure that its European refineries
are capable of manufacturing products meeting European clean fuels
specifications.
 
                                       75
<PAGE>   77
 
     The following tables outline the rated crude and condensate distillation
capacity as of December 31 for each of the past five years and the annual
average daily crude and condensate and other inputs for each of the past five
years.
 
   
<TABLE>
<CAPTION>
                                                                        DECEMBER 31,
                                                              --------------------------------
                                                              1993   1994   1995   1996   1997
                                                              ----   ----   ----   ----   ----
                                                               (THOUSANDS OF BARRELS PER DAY)
<S>                                                           <C>    <C>    <C>    <C>    <C>
REFINERY CRUDE AND CONDENSATE CAPACITY
  Humber Refinery, United Kingdom ..........................  130    130    130    180    180
  MiRO Refinery, Germany(1).................................   43     43     43     43     54
  Czech Republic(2).........................................   --     --     --     29     29
                                                              ---    ---    ---    ---    ---
          Total(3)..........................................  173    173    173    252    263
                                                              ===    ===    ===    ===    ===
</TABLE>
    
 
- ---------------
 
(1) The 1997 figure represents the Company's 18.75 percent interest in the MiRO
    refinery complex at Karlsruhe, Germany. For the years 1996 and earlier,
    Conoco's interest was 25 percent of the OMW refinery.
 
(2) Represents the Company's 16.33 percent interest in two Czech Republic
    refineries.
 
(3) Does not include the Company's indirect 1.2 percent interest in a 95,000
    barrel per day refinery in Mersin, Turkey acquired as a result of the
    Company's marketing joint venture in Turkey.
 
<TABLE>
<CAPTION>
                                                              1993   1994   1995   1996   1997
                                                              ----   ----   ----   ----   ----
                                                               (THOUSANDS OF BARRELS PER DAY)
<S>                                                           <C>    <C>    <C>    <C>    <C>
REFINERY INPUTS(1)
  Humber, United Kingdom(3)
     Crude and condensate(2)................................  131    125    133    121    137
     Other feedstocks.......................................   62     59     74     76     56
  MiRO, Germany(4)
     Crude and condensate(2)................................   46     46     46     47     51
     Other feedstocks.......................................   16     15     13     13     11
  Czech Republic(5)
     Crude and condensate(2)................................   --     --     --     22     21
     Other feedstocks.......................................   --     --     --      1      1
          Total crude and condensate(6).....................  177    171    179    190    209
          Total other feedstocks............................   78     74     87     90     68
</TABLE>
 
- ---------------
 
(1) This table includes feedstocks in addition to crude and condensate on which
    rated capacity is based.
 
(2) This table includes actual crude and condensate runs, which may exceed rated
    capacity.
 
(3) The tie-in of a major expansion project and a major refinery maintenance
    turnaround significantly affected the Humber Refinery's utilization in 1996
    and 1997, respectively.
 
(4) The 1997 figure represents the Company's 18.75 percent interest in the MiRO
    refinery complex at Karlsruhe, Germany. For the year 1996 and earlier years,
    Conoco's interest was 25 percent of the OMW refinery.
 
(5) Represents the Company's 16.33 percent interest in two refineries in the
    Czech Republic.
 
(6) Does not include the Company's 1.2 percent interest in a 95,000 barrel per
    day refinery in Mersin, Turkey.
 
                                       76
<PAGE>   78
 
     The yield of the Company's European refineries by product and country for
the year ended December 31, 1997, was as follows:
 
<TABLE>
<CAPTION>
                                                      UNITED                     CZECH
                                                    KINGDOM(1)   GERMANY(2)   REPUBLIC(3)
                                                    ----------   ----------   -----------
<S>                                                 <C>          <C>          <C>
PERCENT OF TOTAL YIELD
Motor gasoline....................................      38           43           22
Middle distillate.................................      41           38           35
Residual fuel oil and asphalt.....................       9           13           21
Other(1)..........................................      12            6           22
</TABLE>
 
- ---------------
 
(1) Other products primarily include petroleum coke, lubricants and liquefied
    petroleum gases.
 
     United Kingdom Refinery
 
     The Company's wholly owned Humber refinery is located in North
Lincolnshire, England, and has a crude and condensate capacity of 180,000
barrels per day. Crude processed at the refinery is exclusively low-sulfur, and
is supplied primarily from the North Sea and includes lower cost, acidic crudes.
The refinery also processes up to 60,000 barrels per day of other intermediate
feedstocks, mostly vacuum gasoils and resid, which many other European
refineries are not able to process. The refinery's location on the east coast of
England provides for cost-effective North Sea crude imports and product exports
to European and world markets. The Humber refinery, one of the most
sophisticated refineries in Europe, is a full conversion refinery that produces
a full slate of light products and minimal fuel oil. The Company recently
increased crude capacity at the refinery and added a vacuum unit which allows
the refinery to process up to 80,000 barrels per day of the less expensive,
acidic North Sea crudes. The refinery also has two coking units with associated
calcining plants, which upgrade the heavy "bottoms" and imported feedstocks into
light oil products and high value graphite and anode petroleum cokes.
Approximately 50 percent of the light oils produced in the refinery are marketed
in the United Kingdom while the other products are sent to the rest of Europe
and the United States. This gives the refinery the flexibility to take full
advantage of inland and global export market opportunities.
 
     Germany Refinery
 
     The Mineraloel Raffinerie Oberrhein GmbH ("MiRO") refinery in Karlsruhe,
Germany, is a joint venture refinery with a crude and condensate capacity of
288,000 barrels per day. The MiRO joint venture arose from the combination in
1996, of the existing OMW refinery, in which the Company had a 25 percent share,
with an adjacent Esso refinery. The Company has an 18.75 percent interest in
MiRO and the Company's capacity share is 54,000 barrels per day. The other
owners of MiRO are DEA Mineraloel AG, Esso AG and Ruhr Oel GmbH (a 50/50 joint
venture between Veba and PDVSA). Approximately 55 percent of the refinery's
crude feedstock is low cost, high sulfur crude. The MiRO refinery complex is a
full upgrading refinery producing gasoline, middle distillates, residual fuel
oil and other products. The refinery has a high capacity to convert lower cost
feedstocks into high value products primarily with a fluid catalytic cracker and
delayed coker. The coker produces both fuel grade and specialty calcined cokes.
 
     The creation of the MiRO joint venture has improved the refinery's
competitiveness and was driven by the synergy that existed between the two
facilities. Integrated operations have yielded improved product slates, which
better match local demand, and increased processing efficiency, while retaining
operational flexibility for the partners. The refinery processes crude and
feedstock supplied by each of the partners in proportion to their respective
ownership interests. Streamlining the two operations has allowed the Company to
eliminate less efficient processing units in both refineries, resulting in lower
operating costs.
 
     Czech Republic Refineries
 
     In late 1995, the Company, through participation in the newly formed Czech
Refining Company ("CRC"), acquired an interest in two refineries in the Czech
Republic. The other owners of CRC are
 
                                       77
<PAGE>   79
 
Unipetrol A.S., AgipPetroli, and Shell Overseas Investment B.V. The refinery at
Litvinov has a crude and condensate capacity of 109,800 barrels per day, and the
Kralupy refinery has a crude and condensate capacity of 67,500 barrels per day.
The Company's effective 16.33 percent ownership share of the combined capacity
is 29,000 barrels per day. Both refineries process mostly high sulfur crude,
with a large portion being Russian export blend delivered by pipeline at an
advantageous cost. The refineries have an alternative crude supply via a
pipeline from the Mediterranean.
 
     The Company expects that completion of a visbreaker project at the Litvinov
refinery scheduled for the year 2000 will increase conversion rates and
significantly reduce fuel oil production. The Kralupy refinery is currently a
hydroskimming facility, but CRC is currently planning investment in major
conversion facilities, to reduce fuel oil production and increase light oil
yields. The two Czech refineries are operated as a single entity with
intermediate streams moving between the two facilities. CRC markets finished
products both inland and abroad. The Company intends to use its share of the
light oil production to support an expanding retail marketing network in Central
and Eastern Europe.
 
     Marketing
 
     The Company has marketing operations in 17 European countries. The
Company's European marketing strategy is to sell primarily through owned, leased
or joint venture retail sites using a low cost, high volume, low price strategy.
The Company intends to expand into identified growing markets, while
concurrently strengthening its market share in core markets such as Germany,
Austria and the Nordic countries. The Company is standardizing its European
retail operations in order to capture cost savings and prepare for a more
integrated Europe. The Company is continuing to reduce its cost structure for
marketing activities while also optimizing the growing income in the non-fuels
sector. The Company also markets aviation fuels, liquid petroleum gases, heating
oils, transportation fuels and marine bunkers to commercial accounts and into
the bulk or spot market.
 
     The Company uses the "Jet" brand name to market its retail products in its
wholly owned operations in Austria, Czech Republic, Denmark, Finland, Germany,
Hungary, Norway, Poland, Slovakia, Sweden and the United Kingdom. In Belgium and
Luxembourg, it markets under the "Seca" brand. Stations throughout Europe also
display the "Conoco" brand. In addition, various joint ventures in which the
Company has an equity interest market products in Spain, Switzerland and Turkey
under the "Jet", "OK Co-op" and "Tabas" or "Turkpetrol" brand names,
respectively.
 
     As of December 31, 1997, the Company had 1,968 branded marketing outlets in
its wholly owned European operations, of which 1,386 were Company-owned. Through
its joint venture operations in Turkey, Spain and Switzerland, the Company also
has an interest in another 928 retail sites. The largest branded site networks
are in Germany and the United Kingdom, which account for 63 percent of the total
net branded units. In Germany and Austria, where the Company has its biggest
network, 25 outlets were added during 1997. In the Nordic countries, the Company
has expanded from its base of unmanned sites in Sweden and Denmark into Norway
and Finland with 22 new stations in the last two years, bringing the total to
244 stations in the region. In response to weak fuel margins in the United
Kingdom over the past several years, the Company has restructured its operations
there, reducing the number of stations and focusing on locations where the
Company has a competitive advantage. The Company is continuing to reduce its
unit breakeven cost structure in the United Kingdom and is simultaneously
investing to take advantage of the growing income in the non-fuels sector.
 
     The Company has been expanding in targeted growth markets in Central and
Eastern Europe (Czech Republic, Poland, Hungary and Slovakia) and has added 30
stations in the last year for a total of 101 stations at December 31, 1997. The
Company expects to continue this expansion in order to capture the demand growth
and rising margins expected in these inland markets. This marketing expansion
allows the Company to obtain further integration with products produced at the
Czech refineries. Similarly, the Company has invested in the growing markets of
Spain and Turkey where at the end of 1997 it had an interest, through its joint
ventures, in 80 and 766 sites, respectively. The joint venture marketing
operation in Turkey also provides the Company with a strategic position and
opportunity for Upstream ventures in this region.
 
                                       78
<PAGE>   80
 
     ASIA PACIFIC
 
     The Company is looking to the Asia Pacific region for much of its long-term
Downstream growth. Despite the recent economic downturn, the Company expects the
Asian market, in the long term, to grow faster than comparable markets. The
Company intends to establish at least 100,000 barrels per day of equity refining
capacity in the region long-term and expand its marketing operations to
integrate with the refining supply to capitalize on market deregulation and long
term regional demand growth.
 
     The refinery in Melaka, Malaysia, has been built by a joint venture 40
percent owned by the Company (with partners Statoil and the Malaysian state oil
company, Petronas) and will have a crude capacity of 100,000 barrels per day.
Startup of the Melaka refinery was initiated in August 1998 with the
commissioning of the crude unit. Initial crude unit operation will be followed
shortly thereafter by the start-up of the reformer, hydrocracker and coker
units. The joint venture has a five-year tax holiday commencing with initial
operation. The feedstocks for the refinery will consist of up to approximately
70 percent high sulfur crude and 30 percent sweet crude.
 
     This refinery will capitalize on the Company's proprietary coking
technology to upgrade low-cost feedstocks to higher-margin products. Initial
refinery units, in addition to the fuels delayed coker, include a crude and
vacuum distillation unit, a vacuum gas oil hydrocracker, naphtha and diesel
hydrotreater, catalytic reformer, and an isomerization unit. The refinery will
produce a full range of refined petroleum products to help meet the demand for
motor fuels and specialty products in the Asia Pacific region although the
process at Melaka is designed to maximize diesel production in concert with
industry demand in the region.
 
     The Company intends to use its share of refined products from the refinery
to continue growing its retail marketing operations in Thailand, Malaysia and
throughout the Asia Pacific region. The balance of the Company's share of
production will be sold primarily in the spot market. The Company has its
regional crude and product supply and disposition operations centrally located
in Singapore.
 
     The Company began marketing motor fuels in Thailand in 1993. Using a
high-volume/low-price strategy and marketing concepts and strategies that were
new to Thailand, the Company has already established a significant presence in
the Thai retail market. The Company is building more than 20 new Jet branded
retail outlets this year and by the end of 1998 expects to have almost 100
stores in operation. The Company plans to continue building new retail outlets
at a comparable pace until it has 200 stores in the country.
 
     The Company has launched a retail marketing joint venture in Malaysia with
Sime Darby Bhd., a company that has a major presence in the business sector.
Capitalizing on the cost benefits of direct supply, the benefits of being the
first licensees since 1969 to establish retail marketing in Malaysia, and the
currently depressed prices of premium Malaysian real estate, the Company will
initially target major markets within 125 miles of the Melaka refinery. The
Company plans to have six stores operating by the first quarter of 1999.
 
     SPECIALTY PRODUCTS
 
     The Company sells a variety of high value lubricants and specialty products
to commercial, industrial and wholesale accounts worldwide, including lubes
(such as automotive and industrial lubricants and waxes), petroleum coke,
solvents and pipeline flow improvers. The Company's experience has been that
specialty products are attractive because their premium prices generate higher
margins and their markets are generally less cyclical than commodity markets.
 
     The Company began marketing the HYDROCLEAR(TM) brand of lubricants with the
start-up of the Excel Paralubes plant in 1997. The HYDROCLEAR(TM) lubricants
were designed to compete with synthetics for a range of applications with
difficult operating conditions, along with the added value of non-toxicity.
Through its Penreco joint venture company, the Company also produces specialty
petroleum products for global markets.
 
     The Company's technical expertise in carbon upgrading positions it as a
leader in the manufacture and marketing of specialty coke and coke products. The
Company manufactures high quality graphite coke at its Lake Charles and Humber
refineries for use in the global steel industry. It also globally markets anode
and
 
                                       79
<PAGE>   81
 
fuel coke produced at its Lake Charles, Ponca City, Billings and Humber
refineries. In addition, the Company participates in the Asia Pacific coke
market by providing technical and marketing expertise to its PetroCokes joint
venture with Sumitomo and Japan Energy.
 
     The Company is a leader in the worldwide market for pipeline flow
improvers. Conoco's "LiquidPower(TM)" product is a flow improver for increasing
petroleum pipeline capacity by reducing friction loss. The Company also uses
"LiquidPower(TM)" in its own pipeline systems.
 
POWER
 
     Conoco Global Power was founded in 1995 to leverage the economic advantages
of the Company's energy production activities and DuPont's demand for energy in
its manufacturing operations.
 
     The Company has entered into a joint venture agreement to build a natural
gas fired cogeneration plant near Corpus Christi, Texas. Construction has begun
on the plant, which will be located adjacent to chemical complexes owned by
DuPont and OxyChem, Occidental Petroleum Corporation's chemicals division, the
Company's partner in this joint venture. OxyChem will operate the plant under a
long-term contract and will purchase a majority of the plant's electricity and
steam production. The plant is designed to produce 440 megawatts of power and
1.1 million pounds per hour of process steam. The plant will be a qualifying
facility under the Public Utility Regulatory Policies Act and expects to sell
excess electricity in the Texas power markets. Commercial operation of the plant
is expected by January 2000.
 
   
     The Company and DuPont are evaluating a proposed cogeneration facility to
be located at DuPont's Orange, Texas chemical complex. The proposed facility
would be owned by a joint venture between Conoco and a yet to be selected
partner. The facility would provide a portion of the chemical complex's electric
and process steam requirements with much of the electric output being sold as
merchant power. DuPont would be the contract operator of the facility under a
long term operating agreement. A decision by DuPont on the proposal is
anticipated in the fourth quarter of 1998.
    
 
   
     The Company has made a formal proposal to DuPont whereby Conoco would
provide comprehensive energy services to 16 DuPont manufacturing and laboratory
sites. DuPont is evaluating the proposal along with proposals from several other
suppliers.
    
 
CORE VALUES
 
     The Company is committed to four core values: operating safely, protecting
the environment, acting ethically and valuing all people. Conoco is a recognized
industry leader in both concern for the health and safety of its employees and
protecting the environment. In 1997, the Company achieved the lowest recordable
injury rate in its history. This performance earned it the lowest injury rate
among all major petroleum companies reporting to the American Petroleum
Institute, an achievement matched in ten out of the last 15 years.
 
     Conoco is also an innovator both at recycling materials and at operating in
environmentally sensitive areas. In the United Kingdom, for example, the Company
successfully recycled over 99 percent of the Viking gas platforms, which it
redeployed from the North Sea. It has also operated in the Aransas National
Wildlife Refuge in South Texas for almost 60 years. In 1990, the Company took a
major step toward oil spill prevention with the decision to build only
double-hulled tankers -- a decision taken before law mandated such technology.
By the year 2000, the Company intends to have a U.S. fleet consisting entirely
of double-hulled vessels.
 
     In order to maintain the highest ethical standards, the Company established
clear guidelines on business ethics which every employee agrees to follow. The
Company has established annual President's Awards for safety, environmental
protection and valuing all people performance. Valuing people includes seeking
diversity in the workforce, nationalizing a significant portion of its workforce
in each country where it operates as soon as practicable, responding to employee
ideas and concerns, treating everyone with dignity and respect, sharing the
financial success of the Company with substantially all employees through the
"Conoco Challenge" program, and helping employees contribute fully in achieving
business goals. The Company believes that these
                                       80
<PAGE>   82
 
core values result in a motivated workforce with values and goals firmly aligned
with the strategic aims of the business.
 
     These core values provide guidance to employees in working to meet the
expectations of customers, partners and host governments, and in respecting the
communities in which the Company does business.
 
ENVIRONMENTAL REGULATION
 
     Together with other companies in the industries in which it operates, the
Company's operations are subject to numerous federal, state, local, European
Union and other foreign environmental laws and regulations concerning its oil
and gas operations, products and other activities, including legislation that
implements international conventions or protocols. In particular, these laws and
regulations require the acquisition of permits, restrict the type, quantities,
and concentration of various substances that can be released into the
environment, limit or prohibit activities on certain lands lying within
wilderness, wetlands and other protected areas, regulate the generation,
handling, storage, transportation, disposal and treatment of waste materials and
impose criminal or civil liabilities for pollution resulting from oil, natural
gas and petrochemical operations.
 
     Governmental approvals and permits are currently, and may in the future be,
required in connection with the Company's operations. The duration and success
of obtaining such approvals are contingent upon many variables, many of which
are not within the Company's control. To the extent such approvals are required
and not obtained, operations may be delayed or curtailed, or the Company may be
prohibited from proceeding with planned exploration or operation of facilities.
 
     Environmental laws and regulations are expected to have an increasing
impact on the Company's operations in most of the countries in which it
operates, although it is impossible to predict accurately the effect of future
developments in such laws and regulations on the Company's future earnings and
operations. Some risk of environmental costs and liabilities is inherent in
particular operations and products of the Company, as it is with other companies
engaged in similar businesses, and there can be no assurance that material costs
and liabilities will not be incurred. However, the Company does not currently
expect any material adverse effect upon its results of operations or financial
position as a result of compliance with such laws and regulations.
 
     Protection and concern for the environment is one of the Company's core
values. The Company is an innovator both at recycling materials and operating
responsibly in environmentally sensitive areas. The Company operates oil and gas
production facilities, petroleum refineries, natural gas processing plants and
distribution facilities throughout the world. These facilities are subject to
various federal, state, local and foreign environmental laws and regulations. It
is Conoco's policy to fully meet or exceed legal and regulatory requirements
wherever it operates. To meet future environmental obligations, the Company is
engaged in a continuing program to develop effective measures to protect the
environment. This program includes research into reducing sulfur levels in heavy
fuel oils and diesel fuel, reducing benzene content in gasoline, reducing vapor
emissions at service stations, developing more effective methods of containing
and recovering offshore oil spills, improving the quality of emissions and
effluents from the Company's refineries and other facilities, developing and
installing monitoring systems at the Company's facilities and developing
environmental impact assessments before commencing major projects. For a
discussion of the Company's operating expenses and capital expenditures with
respect to environmental protection, see "Management's Discussion and Analysis
of Financial Condition and Results of Operations -- Environmental Matters."
Although future environmental obligations are not expected to have a material
adverse effect on the results of operations or financial condition of the
Company, there can be no assurance that future developments, such as
increasingly stringent environmental laws or enforcement thereof, will not cause
the Company to incur substantial environmental liabilities or costs.
 
     AIR EMISSIONS
 
     The operations of the Company are subject to regulations controlling
emissions of air pollutants. The primary legislation affecting the Company's
U.S. air emissions is the Federal Clean Air Act and its 1990
                                       81
<PAGE>   83
 
Amendments (the "CAA"). Among other things, the CAA requires all major sources
of air emissions to obtain operating permits; the CAA also revised the
definition of "major source" such that additional equipment involved in oil and
gas production may now be covered by the permitting requirements. Although the
precise requirements of the CAA are not yet known, the Company may incur
substantial capital, operating and maintenance costs to comply with such
requirements.
 
   
     The CAA requires EPA to promulgate regulations imposing Maximum Achievable
Control Technology ("MACT") standards to reduce emissions of certain air
pollutants from industrial facilities, such as Conoco's refineries,
transportation terminals and certain crude oil production operations. EPA has
promulgated MACT standards that are applicable to some of Conoco's operations,
and the Company's costs to comply with them have not been material. However,
MACT standards applicable to many of Conoco's other operations have yet to be
promulgated. Consequently, while it is not yet possible to predict accurately
the total actual expenditures that Conoco may incur to comply with these
standards, the Company anticipates that these costs may be substantial.
    
 
     In June 1997, EPA revised the National Ambient Air Quality Standards
("NAAQS") for ozone and particulate matter, which will ultimately require more
stringent controls on stationary sources and cleaner-burning fuels in certain
parts of the United States. The financial impacts of these revisions cannot
reasonably be estimated until individual states adopt regulations to implement
the revised NAAQS, although Conoco believes that such impacts could be
substantial.
 
     Under the CAA, EPA has promulgated a number of regulatory standards that
mandate a variety of specifications for motor fuels designed to reduce emissions
of certain air pollutants from vehicles burning such fuels. These regulated
fuels include gasoline and diesel fuels produced and marketed by Conoco. In
addition, many other countries in which Conoco produces or markets motor fuels
similarly regulate the composition of such products. The Company has already
incurred the costs of complying with such requirements that are currently in
effect. The European Parliament and European Union governments recently agreed
to enact legislation that, among other things, requires phased reductions of
sulfur and aromatics content in gasoline and diesel fuel and of benzene in
gasoline. While it is not yet possible to predict accurately the total actual
expenditures that Conoco may incur to comply with these requirements, the
Company anticipates that these costs may be substantial. EPA also continues to
consider further regulation of motor fuels composition specifications. Although
it is not yet possible to predict the precise composition specifications that
may be imposed by EPA in the future, and therefore, it is not yet possible to
predict accurately the total actual expenditures that may be incurred by Conoco
to produce motor fuels meeting future specifications, such expenditures could be
substantial.
 
     In 1997, an international conference on global warming concluded an
agreement, known as the Kyoto Protocol, which called for reductions of certain
emissions that contribute to increases in atmospheric greenhouse gas
concentrations. The combustion of fossil fuels, such as crude oil, results in
emissions of the type sought to be reduced by the Kyoto Protocol. The treaty
codifying the Kyoto Protocol has not been ratified by the United States, but may
be in the future. In addition, other countries where Conoco has interests, or
may have interests in the future, have made commitments to the Kyoto Protocol
and are in various stages of formulating applicable regulations. Although it is
not yet possible to estimate accurately the total actual expenditures that may
be incurred by Conoco as a result of the Kyoto Protocol, such expenditures could
be substantial.
 
     HAZARDOUS SUBSTANCES AND WASTE DISPOSAL
 
     The Company currently owns or leases numerous properties that have been
used for many years for hardminerals production or natural gas and crude oil
production. Although the Company has utilized operating and disposal practices
that were standard in the industry at the time, hydrocarbons or other wastes may
have been disposed of or released on or under the properties owned or leased by
the Company. In addition, some of these properties have been operated by third
parties over whom the Company had no control. CERCLA and comparable state
statutes impose strict, joint and several liability on owners and operators of
sites and on persons who disposed of or arranged for the disposal of "hazardous
substances" found
 
                                       82
<PAGE>   84
 
   
at such sites. RCRA and comparable state statutes govern the management and
disposal of wastes. Although CERCLA currently excludes petroleum from cleanup
liability, many state laws affecting the Company's operations impose clean-up
liability regarding petroleum and petroleum related products. In addition,
although RCRA currently classifies certain exploration and production wastes as
"nonhazardous," such wastes could be reclassified as hazardous wastes thereby
making such wastes subject to more stringent handling and disposal requirements.
If such a change in legislation were to be enacted, it could have a significant
impact on the Company's operating costs, as well as the gas and oil industry in
general. See "Management's Discussion and Analysis of Financial Condition and
Results of Operations -- Environmental Matters."
    
 
     OIL SPILLS
 
     Under the Federal Oil Pollution Act of 1990, as amended ("OPA"), (i) owners
and operators of onshore facilities and pipelines, (ii) lessees or permittees of
an area in which an offshore facility is located and (iii) owners and operators
of tank vessels ("Responsible Parties") are strictly liable on a joint and
several basis for removal costs and damages that result from a discharge of oil
into the navigable waters of the United States. These damages include, for
example, natural resource damages, real and personal property damages and
economic losses. OPA limits the strict liability of Responsible Parties for
removal costs and damages that result from a discharge of oil to $350 million in
the case of onshore facilities, $75 million plus removal costs in the case of
offshore facilities, and in the case of tank vessels, an amount based on gross
tonnage of the vessel. However, these limits do not apply if the discharge was
caused by gross negligence or wilful misconduct, or by the violation of an
applicable Federal safety, construction or operating regulation by the
Responsible Party, its agent or subcontractor or in certain other circumstances.
 
     In addition, with respect to certain offshore facilities, OPA requires
evidence of financial responsibility in an amount of up to $150 million. Tank
vessels must provide such evidence in an amount based on the gross tonnage of
the vessel. OPA also requires offshore facilities, certain onshore facilities
and tank vessels to prepare spill response plans, which the Company has done,
for responding to a "worst case discharge" of oil. Failure to comply with these
requirements or failure to cooperate during a spill event may subject a
Responsible Party to civil or criminal enforcement actions and penalties.
 
     OFFSHORE PRODUCTION
 
     Offshore oil and gas operations in U.S. waters are subject to regulations
of the United States Department of the Interior which currently impose strict
liability upon the lessee under a Federal lease for the cost of clean-up of
pollution resulting from the lessee's operations, and such lessee could be
subject to possible liability for pollution damages. In the event of a serious
incident of pollution, the Department of the Interior may require a lessee under
Federal leases to suspend or cease operations in the affected areas. See
"-- Litigation and Other Contingencies."
 
SOURCES OF SUPPLY
 
     During 1997, the Company supplemented its own crude oil production to meet
its refining requirements by the purchase of crude oil from both domestic and
international sources. Approximately 56 percent of the crude oil processed in
the Company's U.S. refineries in 1997 came from U.S. sources. The remainder of
crude processed came principally from Venezuela, Mexico and Canada. During 1997,
the Company's Humber refinery in the United Kingdom processed principally North
Sea crude oils. In the joint venture MiRO refinery, the Company processed
primarily Mediterranean crude oils in 1997. The Company's joint venture CRC
refineries in the Czech Republic process primarily Russian crudes.
 
     To assure availability, the Company maintains multiple sources for most raw
materials, supplies, services and equipment, with no one company supplying a
substantial portion of the Company's needs. The Company also routinely leases or
charters equipment, such as drilling rigs, offshore supply boats, seismic boats,
pipeline laying equipment, derrick barges, and cranes. Availability of supply
and/or cost of such equipment has been a factor in the past, and could have a
detrimental impact on the Company in the future.
 
                                       83
<PAGE>   85
 
RESEARCH AND DEVELOPMENT
 
     The objectives of the Company's research and development programs are to
discover new products, processes and business opportunities in relevant fields,
and to improve existing products and processes. Research and development also
focuses on improving efficiency, safety and environmental protection. Worldwide
expenditures for research and development amounted to approximately $44 million
in 1997, $41 million in 1996 and $36 million in 1995. Approximately $46 million
is budgeted for research and development activities in 1998.
 
     The capabilities of the Company's research and development group have been
augmented by its access to DuPont's corporate science and engineering resources.
Certain elements of DuPont's material science expertise and analytical
capabilities are relevant to the Company's oil and gas research and development
work. Following the Separation, the Company will continue to have access to
DuPont's corporate science and engineering expertise pursuant to transitional
agreements.
 
PATENTS AND TRADEMARKS
 
   
     The Company owns and is licensed under various patents, which expire from
time to time, covering many products, processes and product uses. No individual
patent is of material importance to the Company's business as a whole. During
1997, the Company was granted seven U.S. and 26 non-U.S. patents. The Company
also has individual trademarks and brands for its products and services which
are registered in various countries throughout the world. None of these
trademarks and brands is considered material other than the "Conoco" and "Jet"
brands.
    
 
OPERATING HAZARDS AND INSURANCE
 
   
     The Company's operations are subject to certain operating hazards such as
well blowouts, collapsed wells, explosions, uncontrolled flows of oil, natural
gas or well fluids, fires, formations with abnormal pressures, pipeline ruptures
or spills, refinery explosions, surface or marine transportation incidents,
pollution, releases of toxic gas and other environmental hazards and risks. In
accordance with customary industry practices, the Company maintains insurance
against some, but not all, such risks and losses. Given the Company's risk
profile and in accordance with the practices of a number of major, integrated,
international energy companies, Conoco does not carry business interruption
insurance. The Company's decision not to carry business interruption insurance
is based on several factors, including its spread of risk over five wholly owned
refineries (with some resultant ability to replace product during periods of
business interruption), a favorable loss history and loss prevention and safety
programs. The Company has elected to retain the risk where management believes
the cost of insurance, although available, is excessive relative to the risks
presented. In addition, pollution and environmental risks are generally not
fully insurable. See "Risk Factors -- Operating Hazards."
    
 
LITIGATION AND OTHER CONTINGENCIES
 
   
     One proceeding instituted by governmental authorities is pending against
Conoco for alleged violations of RCRA with the potential for monetary sanctions
in excess of $100,000. Although regulatory authorities have requested a civil
penalty of $169,000 with respect to this proceeding, Conoco expects that the
matter will ultimately be resolved for a substantially smaller penalty.
    
 
   
     On March 6, 1996, the Department of Justice filed a complaint in the United
States District Court for the District of Montana against Yellowstone Pipeline
Company ("YPL") and the Conoco Pipe Line Company as a part owner and operator of
YPL. The complaint alleges discharges of oil from a YPL pipeline in January 1993
and seeks civil penalties of up to $25,000 per day for each violation or up to
$1,000 for each barrel of oil discharged. Since the duration of the discharge is
in dispute, the penalty calculation is uncertain although it is expected to
exceed $100,000. The parties are attempting to negotiate a resolution of the
matter, including a supplemental environmental project that would constitute a
substantial part of a settlement with the government.
    
 
                                       84
<PAGE>   86
 
     Conoco has been assessed a monetary penalty in the amount of $298,000 by
the New Mexico Environmental Department, Air Quality Bureau. The demand was made
on June 18, 1998. New Mexico alleges that Conoco failed to obtain a permit under
the CAA and violated certain permit conditions in the existing permits. Conoco
assets affected are the Maljamar Gas Plant and the MCA field. Conoco expects to
obtain settlement by payment of a lesser monetary penalty and performance of a
supplemental environmental project.
 
   
     The Company is a defendant in a number of lawsuits and is involved in
governmental proceedings arising in the ordinary course of business, including
personal injury claims, environmental claims and leaking underground storage
tank claims and, along with other oil companies, actions challenging oil and gas
royalty, severance tax, and other payments, including claims based on posted
prices. The Company believes ultimate liabilities resulting from such lawsuits
and claims may be material to results of operations in the period in which they
are recognized, but will not materially affect the combined financial position
of the Company.
    
 
PROPERTIES
 
     The Company owns its corporate headquarters, consisting of 16 three-story
buildings on a 62-acre site in Houston, Texas. The Company owns and leases
petroleum properties and operates production processing, refining, marketing,
power-generating, and research and development facilities worldwide. In
addition, the Company operates sales offices, regional purchasing offices,
distribution centers, and various other specialized service locations throughout
the world.
 
EMPLOYEES
 
     The Company had approximately 16,400 employees as of June 30, 1998.
Approximately 1,400 employees at the Company's U.S. refineries are represented
by the Oil, Chemical and Atomic Workers International Union under separate
bargaining agreements for each refinery. These agreements cover wages, certain
benefit matters, grievance procedures and various employment conditions, and the
Company believes they are typical of the refining industry in the U.S. The
Company believes that its relations with its employees are good.
 
                                       85
<PAGE>   87
 
                                   MANAGEMENT
 
DIRECTORS AND EXECUTIVE OFFICERS
 
   
     Set forth below is information concerning the current executive officers
and current and prospective directors of the Company. Each director holds office
until his successor is duly elected and qualified or until his resignation or
removal if earlier. See "Description of Capital Stock -- Anti-Takover Effects of
Certain Certificate and By-Law Provisions -- Board of Directors."
    
 
   
<TABLE>
<CAPTION>
               NAME                 AGE(2)                  POSITION WITH THE COMPANY
- ----------------------------------    --     -------------------------------------------------------
<S>                                 <C>      <C>
Edgar S. Woolard, Jr..............   64      Chairman of the Board of Directors
Archie W. Dunham..................   59      President, Chief Executive Officer and Director
Ruth R. Harkin(1).................   53      Director
Frank A. McPherson(1).............   65      Director
Gary M. Pfeiffer..................   48      Director
William K. Reilly(1)..............   58      Director
William R. Rhodes(1)..............   62      Director
Franklin A. Thomas(1).............   63      Director
Gary W. Edwards...................   56      Executive Vice President, Refining, Marketing, Supply
                                             and Transportation
Robert E. McKee III...............   52      Executive Vice President, Exploration Production
Robert W. Goldman.................   56      Senior Vice President, Finance, and Chief Financial
                                             Officer
Rick A. Harrington................   53      Senior Vice President, Legal, and General Counsel
</TABLE>
    
 
- ---------------
 
(1) Expected to be elected as a Director at the Company's first regular board
    meeting following the Offerings.
 
(2) As of July 31, 1998.
 
   
     Edgar S. Woolard, Jr. retired as Chairman of the Board of Directors of
DuPont on October 29, 1997, having served since 1989. He remains a director of
DuPont. Since he joined DuPont in 1957, he occupied many technical and
managerial positions at various locations across the United States. From 1987 to
1989, Mr. Woolard served as President and Chief Operating Officer of DuPont, and
from 1989 to 1995, as Chairman and Chief Executive Officer. Mr. Woolard is a
director of Citicorp and Apple Computer, Inc. and a member of The Business
Council, the Board of Trustees of Winterthur Museum, the Christiana Care
Corporation, the Protestant Episcopal Theological Seminary in Virginia and the
North Carolina Textile Foundation. He is also a member of the National Academy
of Engineering and the Bretton Woods Committee.
    
 
   
     Archie W. Dunham has been President and Chief Executive Officer of the
Company since 1996. He joined the Company in 1966 and subsequently held a number
of commercial and managerial positions within the Company and DuPont. He
currently serves on both companies' boards of directors. Mr. Dunham is also a
member of the Louisiana-Pacific Corporation Board of Directors and has been
elected a director of Phelps Dodge Corporation effective November 4, 1998. Mr.
Dunham is a former Executive Vice President, Exploration Production and
Executive Vice President, Refining, Marketing, Supply and Transportation for the
Company. He was also a Senior Vice President, Polymers and Senior Vice
President, Chemicals and Pigments for DuPont. He is a director of the American
Petroleum Institute, the National Petroleum Council, the U.S.-Russia Business
Council, the Greater Houston Partnership and Chairman of the United States
Energy Association. Mr. Dunham is a member of the Board of Visitors and the
Energy Center Board of Directors at the University of Oklahoma. He also serves
on the board of trustees of the Memorial Hermann Healthcare System in Houston,
the Houston Grand Opera, the Houston Symphony, the George Bush Presidential
Library and the Smithsonian Institution.
    
 
   
     Ruth R. Harkin is Senior Vice President, International Affairs and
Government Relations of United Technologies Corporation ("UTC") and Chair of
United Technologies International, UTC's international representation arm.
Previously, Mrs. Harkin was the president and chief executive officer of the
Overseas Private Investment Corporation (OPIC) in the Clinton administration
from 1993 to 1997. Mrs. Harkin was
    
 
                                       86
<PAGE>   88
 
elected as a prosecutor in the office of the County Attorney of Story County,
Iowa in 1973. She also served as Deputy General Counsel at the U.S. Department
of Agriculture and was Of Counsel at the law firm of Akin, Gump, Strauss, Hauer
& Feld. Mrs. Harkin is a member of the Board of Visitors of the College of
Business Administration, University of Iowa. She also sits on the Boards of the
Center for National Policy and the National Association of Manufacturers, and is
a Trustee of the Eurasia Foundation.
 
     Frank A. McPherson retired as Chairman and Chief Executive Officer of
Kerr-McGee Corporation on February 1, 1997. He joined Kerr-McGee in 1957 and
held many technical, operational and managerial positions including President
from 1980 to 1983. He is a past director of the Federal Reserve Bank of Kansas
City and the Oklahoma State University foundation Board of Trustees. Mr.
McPherson serves on the boards of directors of Kimberly-Clark Corp., Bank of
Oklahoma, Tri-Continental Corporation, Seligman Quality Fund, Inc., Seligman
Select Municipal Fund, Inc., and the Seligman Group of Mutual Funds. He is also
a member of the boards of the American Petroleum Institute, Boys and Girls Clubs
of America, Baptist Medical Center, Oklahoma Chapter of Nature Conservancy,
Oklahoma City Chamber of Commerce, Oklahoma City Public School Foundation,
Oklahoma Medical Research Foundation and Oklahoma Foundation for Excellence in
Education.
 
     Gary M. Pfeiffer has been Senior Vice President, Finance and Chief
Financial Officer of DuPont since 1997. Previously from 1994 to 1997, Mr.
Pfeiffer was Vice President and General Manager of DuPont Nylon, North America,
with responsibility for all of DuPont's nylon fiber and intermediate business in
North America. He has also served as Global Business Director, Nylon
Intermediates for DuPont Chemicals, from 1992 to 1994, and as Director - Finance
for DuPont Chemicals and Specialties Manufacturing, from 1991 to 1992. Since he
joined DuPont in 1974, Mr. Pfeiffer has held a number of technical and
managerial positions in the United States and overseas. He is also on the board
of the Hagley Museum and Library.
 
     William K. Reilly is currently a member of the Board of Directors of DuPont
and is President and Chief Executive Officer of Aqua International Partners, an
investment group which finances water improvements in developing countries.
Formerly, Mr. Reilly was a visiting professor at the Institute of International
Studies at Stanford University and served as Administrator of the U.S.
Environmental Protection Agency from February 1989 to January 1993. Mr. Reilly
was president of the Conservation Foundation from 1973 to 1989 and, after its
affiliation with World Wildlife Fund in 1985, served as President of both
groups. He also serves on the boards of Royal Caribbean International and
Evergreen Holdings. He is Chairman of the Board of the American Farmland Trust
and serves on the boards of National Geographic Society, World Wildlife Fund and
Yale University. Mr. Reilly also serves as a member of the board of the Presidio
Trust of San Francisco.
 
     William R. Rhodes is a Vice Chairman of Citicorp and its principal
subsidiary, Citibank. Mr. Rhodes is Vice Chairman of the Institute of
International Finance; a Director of the Private Export Funding Corporation; a
trustee and member of the Executive Council of the Council of the Americas; an
Executive Committee member of the Bretton Woods Committee and the U.S.-Russia
Business Council; and a founding member of the U.S. National Advisory Council to
the International Management Center. Other board memberships include The Group
of Thirty; the Americas Society; The African-American Institute; CHIPCo; and the
U.S.-Egypt Presidents' Council. He is also a member of the Council on Foreign
Relations, the Foreign Policy Association, and The Bankers Roundtable. Mr.
Rhodes is a past Chairman of the U.S. Advisory Committee of the Export-Import
Bank of the United States; past Chairman of the U.S. section of the
Venezuela-U.S. Business Council; past President of the Venezuela-American
Chamber of Commerce; and past President of the Bankers Association for Foreign
Trade. He is a Governor and Trustee of the New York and Presbyterian Hospital
and a Director of the New York City Partnership and Chamber of Commerce. He
serves as a trustee of Brown University and Chairman of the Board of Trustees of
the Northfield Mount Hermon School.
 
     Franklin A. Thomas has been a consultant to the TFF Study Group, a
non-profit initiative assisting development in southern Africa, since April
1996. Mr. Thomas was President and Chief Executive Officer of The Ford
Foundation from 1979 to 1996. He also serves as a director of the Aluminum
Company of America, Citicorp and its subsidiary, Citibank, N.A., Cummins Engine
Company, Inc., Lucent Technologies, Inc. and PepsiCo, Inc.
 
                                       87
<PAGE>   89
 
     Gary W. Edwards has been Executive Vice President of the Company since
1991, with responsibility for worldwide refining, marketing, supply and
transportation. He is currently a Senior Vice President of DuPont. He joined the
Company in 1963, working at various locations throughout the United States and
in the United Kingdom, and was formerly the Company's Vice President, Refining
Marketing Europe; Vice President Refining, Marketing and Transportation; and
Vice President North American Marketing. Mr. Edwards has held a number of
managerial positions in Conoco Pipeline, Transportation, Natural Gas and Gas
Products, Logistics and Marketing. He is a Director of the American Petroleum
Institute and a previous director and Vice President of the European Petroleum
Industry Association in Brussels, Belgium. Mr. Edwards is Chairman of the Kansas
State University Engineering advisory council and a member of the Yellowstone
Park foundation advisory committee. He is a board member of Theatre Under the
Stars, Junior Achievement, Inc. (National) as well as Junior Achievement of
Southeast Texas, Target Hunger, Private Sector Initiative, and the Houston Music
Hall Foundation.
 
     Robert E. McKee III has been an Executive Vice President for the Company
since 1992, with responsibility for worldwide exploration and production. He is
currently a Senior Vice President of DuPont. He was formerly the Company's
Executive Vice President for Corporate Strategy and Development, Senior Vice
President for Administration, Vice President of North American Refining and
Marketing and Vice President, Chairman and Managing Director of Conoco (UK)
Limited. Since he joined Conoco in 1968, Mr. McKee has worked at various
locations and held numerous managerial, operating, administrative and technology
positions both in the United States and overseas. He currently serves on the
board of directors of Consolidation Coal Company, a subsidiary of DuPont, and
the American Petroleum Institute. In addition, he is Chairman of the Southern
Regional Advisory Board of the Institute of International Education and a member
of the advisory committee of the University of Texas Engineering Department. Mr.
McKee also serves on the board of directors of the Houston Museum of Natural
Science and as Chairman of the President's Council of the Colorado School of
Mines.
 
     Robert W. Goldman has been Senior Vice President, Finance, and Chief
Financial Officer of the Company since 1998 and was its Vice President, Finance
from 1991 to 1998. Mr. Goldman began his career with DuPont in 1965 and
subsequently held many technical and managerial positions within the finance,
tax and treasury functions. He is the former Vice President - Finance of DuPont
(Mexico), Vice President, Remington Arms Company and served as Director and
Comptroller of several operating departments of DuPont in Wilmington, Delaware.
Mr. Goldman transferred to the Company in 1988 as Vice President and Controller.
He is co-chairman of the Company's Risk Management Committee and is a member of
the American Petroleum Institute, a former chairman of its Accounting Committee
and currently serves on its Executive Committee of the General Committee on
Finance. He is also a member of the Financial Executives Institute and the
Executive Committee of the Board of Directors of the Alley Theatre in Houston,
Texas.
 
     Rick A. Harrington has been Senior Vice President, Legal, and General
Counsel of the Company since 1998 and was Vice President and General Counsel of
the Company and Vice President and Assistant General Counsel of DuPont from 1994
to 1998. He joined DuPont in 1979 as a Senior Attorney, and subsequently held
the positions of Managing Counsel, Special Litigation, and Vice President and
General Counsel of Consolidation Coal Company, a subsidiary of DuPont. Prior to
joining DuPont, he was a partner in the firm of Arent, Fox, Kintner, Plotkin and
Kahn in Washington, D.C. where he specialized in antitrust litigation. Mr.
Harrington is a member of the bar of the District of Columbia, the District of
Columbia Court of Appeals and the Fifth Circuit Court of Appeals. He is a member
of the American Petroleum Institute General Committee on Law, the American
Corporate Counsel Association International Legal Affairs Committee, and the
University of Kansas School of Business Dean's Board.
 
     Effective as of the closing of the Offerings, Messrs. Dunham, McKee,
Edwards and Harrington will resign as officers of DuPont.
 
ELECTION AND COMPENSATION OF DIRECTORS
 
     The By-laws provide for a Board of Directors of not less than six nor more
than 15 directors, with the current number set at nine (eight of which have been
named as of the date hereof). Each member of the
 
                                       88
<PAGE>   90
 
Board of Directors holds office until the expiration of his or her term and
until his or her successor is elected and qualified. Vacancies on the Board of
Directors may be filled by the majority vote of directors then in office or by a
sole remaining director, or by stockholder vote if such vacancy was caused by
action taken by stockholders. DuPont elected the current members of the Board of
Directors on July 24, 1998. Edgar S. Woolard, Jr., Gary M. Pfeiffer, William K.
Reilly, William R. Rhodes and Franklin A. Thomas are nominees of DuPont under
the terms of the Separation Agreement. See "Arrangements Between the Company and
DuPont."
 
   
     Directors who are officers of the Company or employees of DuPont will
receive no additional compensation for serving on the Board of Directors. At the
time of the Offerings, nonemployee members of the Board of Directors (including
those persons who have agreed to become nonemployee directors in connection with
the Offerings) will receive a special grant of an option to purchase Class A
Common Stock (each, a "Company Stock Option") with a present value of $30,000
and a grant of Company restricted stock units with respect to Class A Common
Stock with an aggregate value of $95,000. Future nonemployee Directors, upon
election to the Board, will receive a grant of Company restricted stock units
with respect to Class A Common Stock with an aggregate value equal to $95,000.
On an annual basis, nonemployee Directors will receive a fee of $30,000, and,
following the annual meeting, a grant of Company restricted stock units with
respect to Class A Common Stock with an aggregate value of $20,000 and Company
Stock Options with a present value of $30,000. Company Stock Options and Company
restricted stock units will be awarded pursuant to the terms of the 1998 Stock
and Performance Incentive Plan of the Company (described below). The present
value of Company Stock Options will be determined using a generally accepted
stock option valuation methodology. Annual fees may be, and awards of restricted
stock units will be, deferred pursuant to the terms of the Deferred Compensation
Plan for Nonemployee Directors (described below).
    
 
     Board members will also be eligible to participate in a Charitable Gift
Plan, which provides that, upon a Director's death, the Company will make a
donation in an amount equal to $200,000 per year for five years to the
tax-exempt educational institutions or charitable organizations recommended by
such director and approved by the Company. Each director will be fully vested in
the Charitable Gift Plan upon completion of one year of service as director. The
Company may fund the Charitable Gift Plan through, among other vehicles, the
purchase of life insurance policies on the lives of the directors, of which
policies the Company would be the beneficiary and which policies the Company
would own. Employee directors may elect to participate in the plan provided they
bear their allocable cost of the plan. Directors derive no personal financial or
tax benefit from the Charitable Gift Plan, since the charitable, tax-deductible
donations and insurance proceeds, if any, accrue solely to the benefit of the
Company.
 
     Board members who serve as Chairman of a standing Board committee will
receive a supplement of $5,000 annually. No additional fees will be paid for
serving on Board committees. No additional fees will be paid for attending Board
or committee meetings.
 
     In lieu of the compensation payable to nonemployee directors described
above (other than participation in the Charitable Gift Plan), Edgar S. Woolard,
Jr., Chairman of the Board, will receive an annual fee of $300,000 and equity
grants with a present value of $700,000. The annual fee will commence at the
closing of the Offerings. An initial grant of Company restricted stock units
with a value of $100,000 and nonqualified Company Stock Options with a present
value of $1,300,000 will be made at the closing of the Offerings and will cover
a two-year period. Company restricted stock units and Company Stock Options will
be granted pursuant to the terms of the 1998 Stock and Performance Incentive
Plan and will have provisions consistent with those of the other nonemployee
directors.
 
COMMITTEES OF THE BOARD OF DIRECTORS
 
     AUDIT AND COMPLIANCE COMMITTEE
 
   
     The Audit and Compliance Committee has oversight responsibility for
Conoco's internal control structure, financial reporting, and legal compliance
program, including strategic oversight of corporate safety, health and
environmental policy and direction. The Audit and Compliance Committee selects
an independent accounting firm, subject to shareholder ratification, to audit
the financial statements of the Company. The
    
 
                                       89
<PAGE>   91
 
Audit and Compliance Committee also requests the Company's subsidiaries to
engage independent accountants, as deemed appropriate by the Audit and
Compliance Committee, to audit their respective financial statements. The Audit
and Compliance Committee ensures there is a corporate system in place to provide
timely and accurate information to senior management and the Board concerning
the Company's compliance with the law. The Audit and Compliance Committee meets
to consider matters raised by its members, internal legal staff, management,
internal auditing staff, and the independent accountants. It reports to the
Board of Directors a summary of its findings and recommendations. Members of the
Audit and Compliance Committee are independent from the Company's management and
free from any relationship that, in the opinion of the Board of Directors, would
interfere with the exercise of independent judgement. The Audit and Compliance
Committee will initially consist of Frank A. McPherson, Ruth R. Harkin, Gary M.
Pfeiffer and William R. Rhodes. Mr. McPherson will serve as chairman of the
Audit and Compliance Committee.
 
     COMPENSATION COMMITTEE
 
     The Compensation Committee is responsible for establishing certain
compensation policies consistent with corporate objectives and stockholder
interests. The Compensation Committee has responsibility for approving and/or
recommending to the Board levels of compensation for the President and Chief
Executive Officer, as well as stock options, performance awards and other stock
or cash-based awards for employee directors and executive officers. The
Compensation Committee also administers certain grants under the Company's
stock-based and other global performance-based compensation plans and adopts
and/or recommends to the full Board new plans or changes in compensation
programs. No member of the Compensation Committee may be an employee or officer
of the Company or any of its subsidiaries. The Compensation Committee will
initially consist of Franklin A. Thomas, William K. Reilly and Edgar S. Woolard,
Jr. Mr. Thomas will serve as chairman of the Compensation Committee.
 
     Prior to the Offerings, the executive officers named in the Summary
Compensation Table below were participants in the executive compensation
programs of DuPont. The compensation committee of DuPont was responsible for the
review of those programs, and for grants awarded under those programs.
 
STOCK OWNERSHIP OF DIRECTORS AND EXECUTIVE OFFICERS
 
     No present officer, director or director nominee currently owns any shares
of Conoco's Common Stock, all of which are currently owned by DuPont. The
following table sets forth the number of shares of DuPont common stock
beneficially owned on June 15, 1998, by each of the Company's directors,
director nominees, the executive officers named in the Summary Compensation
Table below and all directors, director nominees and executive officers of the
Company as a group. Except as otherwise noted, the individual director, director
nominee or executive officer or their family members had sole voting and
investment power with respect to such securities.
 
   
<TABLE>
<CAPTION>
                                                                  SHARES
                                                               BENEFICIALLY
                           NAME                              OWNED(1)(2)(3)(4)
                           ----                              -----------------
<S>                                                          <C>
Edgar S. Woolard, Jr.......................................      1,495,881(5)
Archie W. Dunham...........................................        834,487(6)
Frank A. McPherson.........................................          1,000(7)
Gary M. Pfeiffer...........................................         43,237(8)
William K. Reilly..........................................          7,407
Gary W. Edwards............................................        442,516(9)
Robert E. McKee III........................................        372,089(10)
Robert W. Goldman..........................................        105,661(11)
Rick A. Harrington.........................................         98,203(12)
Directors and Executive Officers as a Group (12 persons)...      3,400,481
</TABLE>
    
 
- ---------------
 
 (1)  No individual director, director nominee or named executive officer
      beneficially owns 1 percent or more of the DuPont common stock, nor do the
      directors and executive officers as a group.
                                       90
<PAGE>   92
 
 (2)  Mrs. Harkin, Mr. Rhodes and Mr. Thomas do not beneficially own any shares.
 
   
 (3)  Includes beneficial ownership of the following number of shares of DuPont
      common stock which may be acquired within 60 days of June 15, pursuant to
      stock options awarded under employee compensation plans of DuPont: Mr.
      Woolard -- 1,101,240; Mr. Dunham -- 704,428; Mr. Pfeiffer -- 31,602; Mr.
      Edwards -- 367,846; Mr. McKee -- 296,398; Mr. Goldman -- 93,306; and Mr.
      Harrington -- 89,058. Messrs. Dunham, Edwards, McKee, Goldman and
      Harrington have agreed to the cancellation of 100 percent of these options
      in the Option Program and the issuance upon such cancellation of Company
      Stock Options, as described below under "-- Treatment of Outstanding Stock
      Options and Stock Appreciation Rights -- Option Program."
    
 
 (4)  The persons named in this table have sole voting power and investment
      power with respect to all shares of DuPont common stock shown as
      beneficially owned by them, subject to community property laws where
      applicable and the information contained in this table and these notes.
 
 (5)  Includes (i) 20,000 shares owned by Mr. Woolard's spouse to which Mr.
      Woolard disclaims beneficial ownership, (ii) 18,000 shares owned by The
      Woolard Family Foundation, and (iii) 13,698 shares owned by family trusts.
 
 (6)  Includes (i) 104,880 shares held in Dunham Management Trust, a revocable
      grantor trust and (ii) 6,204 shares held in deferred compensation.
 
 (7)  The 1,000 shares listed above are owned by Mr. McPherson and his spouse
      jointly.
 
 (8)  Includes 1,796 shares held in deferred compensation.
 
 (9)  Includes 6,800 shares owned by the Edwards Charitable Foundation.
 
(10)  Includes (i) 1,300 shares owned by a minor child of Mr. McKee, (ii) 298
      shares owned by another child of Mr. McKee, (iii) 453 shares owned by a
      minor grandchild of Mr. McKee, (iv) 453 owned by another minor grandchild
      of Mr. McKee, and (v) 29,509 owned by the McKee Family Trust.
 
(11)  Includes (i) 1,650 shares owned by Mr. Goldman's spouse, and (ii) 350
      shares owned by a minor child of Mr. Goldman.
 
(12)  Includes 50 shares owned by a child of Mr. Harrington.
 
     Company Stock Options and other stock-based awards may be granted to
directors, officers and other key employees of the Company in the future under
the 1998 Stock and Performance Incentive Plan of the Company. See "-- Election
and Compensation of Directors."
 
TREATMENT OF OUTSTANDING STOCK OPTIONS AND STOCK APPRECIATION RIGHTS
 
     OPTION PROGRAM
 
     Each individual who (i) is actively employed by the Company as of the date
of the closing of the Offerings (the "Effective Date"), (ii) either (a) was an
employee of the Company more than 20 days prior to the Effective Date or (b) was
designated as an individual who would become an employee of the Company and such
designation occurred more than 20 days prior to the Effective Date and (iii)
holds, as of the closing of the Offerings, options to purchase DuPont common
stock (each such option, a "DuPont Option") or appreciation rights with respect
to DuPont common stock (each such right, a "DuPont SAR") will have the option,
subject to specific country tax and legal requirements, effective as of the
closing of the Offerings, to surrender for cancellation in the Option Program
each such DuPont Option or DuPont SAR, whether or not vested or exercisable, and
upon such cancellation, the Company will issue to such employee a Company Stock
Option or an appreciation right with respect to Class A Common Stock (a "Company
SAR"), as applicable. In general, Company Stock Options that qualify as
incentive stock options, as defined in the Code ("Incentive Stock Options"), are
to be issued upon cancellation of DuPont Options that qualify as Incentive Stock
Options, and Company nonqualified stock options are to be issued upon
cancellation of DuPont nonqualified stock options. The number of shares subject
to each Company Stock Option and each Company SAR issued in the Option Program,
and the exercise price per share of each such Company Stock Option and Company
SAR, will be determined in the manner described below that will reflect, in the
aggregate, the difference
 
                                       91
<PAGE>   93
 
between the exercise price of the DuPont Options and the fair market value per
share of DuPont common stock and, in the case of DuPont SARs, the appreciated
value of such SARs.
 
   
     The exercise price applicable to each Company Stock Option and Company SAR
issued upon cancellation of DuPont Options and DuPont SARs (the "Company
Exercise Price") will be the price (rounded to the nearest fourth decimal)
obtained by dividing (i) the exercise price of the applicable DuPont Option or
DuPont SAR (the "DuPont Exercise Price") by (ii) the ratio (the "Option Ratio")
of (a) the average price (the "DuPont Share Price") of DuPont common stock over
the five trading days ending on the date the initial offering price to the
public of a share of Class A Common Stock in the Offerings is determined
(calculated as the average of the mean of the high and low prices of DuPont
common stock on each of these five days as reported on the NYSE) to (b) the
offering price to the public of the Class A Common Stock set forth on the cover
page of this Prospectus (the "IPO Price"). The DuPont Share Price is
$          . Each such Company Stock Option will entitle the holder to purchase,
and each such Company SAR will relate to, the whole number of shares of Class A
Common Stock (rounded up to the nearest whole share, in the case of a
nonqualified stock option, and rounded down to the nearest whole share, in the
case of an Incentive Stock Option) obtained by multiplying the number of shares
of DuPont common stock underlying the applicable DuPont Option or DuPont SAR by
the Option Ratio. In the case of any DuPont Option that qualifies as an
Incentive Stock Option, the formula set forth above will be adjusted, if
necessary, to comply with the Code.
    
 
   
     Mr. Dunham and the other executive officers named in the Summary
Compensation Table below have agreed to the cancellation in the Option Program
of 100 percent of their DuPont Options and DuPont SARs and the issuance upon
such cancellation of Company Stock Options and Company SARs.
    
 
   
     All Company Stock Options and Company SARs issued upon cancellation of
DuPont Options and DuPont SARs will remain subject to the threshold, vesting,
exercisability and option-length terms and conditions to which the DuPont
Options and DuPont SARs were subject prior to cancellation. DuPont Options and
certain DuPont SARs that are not canceled in the Option Program generally will
terminate 12 months after DuPont's ownership of the Company decreases to less
than 50 percent. The Option Program will be conducted in accordance with such
procedures and at such time as is determined by DuPont's Compensation Committee
and the Company. See "Arrangements Between the Company and DuPont -- Employee
Matters Agreement."
    
 
   
     Company Stock Options and Company SARs to be granted to the 17 senior
officers of the Company upon cancellation of DuPont Options and DuPont SARs are
to be granted under the Company's 1998 Stock and Performance Incentive Plan.
Company Stock Options and Company SARs to be granted to the remaining officers
and other employees of the Company upon cancellation of DuPont Options and
DuPont SARs are to be granted under the Company's 1998 Key Employee Stock
Performance Plan. As of July 31, 1998, the 17 senior officers of the Company
held an aggregate of 4,104,583 DuPont Options and 57,200 DuPont SARs eligible
for the Option Program, and the remaining officers and other employees of the
Company held an aggregate of 7,102,249 DuPont Options and 1,251,213 DuPont SARs
eligible for the Option Program. Assuming a DuPont Share Price of $58 and an IPO
Price of $22, up to 29.5 million Company Stock Options and 3.4 million Company
SARs will be issuable upon cancellation of such DuPont Options and DuPont SARs.
The actual number of Company Stock Options and Company SARs issued will vary
based on the DuPont Share Price, the IPO Price and the number of DuPont Options
and DuPont SARs surrendered for cancellation. For a more detailed description of
the Company Stock Options and Company SARs to be issued in the Option Program,
see "-- 1998 Stock and Performance Incentive Plan of the Company," "-- 1998 Key
Employee Stock Performance Plan," "-- Certain Provisions Applicable to the Plan
and the 1998 Plan" and "-- Material Federal Income Tax Consequences of the Plan
and the 1998 Plan."
    
 
   
     MATERIAL UNITED STATES FEDERAL TAX CONSEQUENCES OF THE OPTION PROGRAM
    
 
   
     The following is a discussion of United States federal income tax
consequences of the cancellation of DuPont Options and DuPont SARs and the
issuance upon such cancellation of Company Stock Options and Company SARs in
connection with the Option Program. This discussion does not address tax
considerations that may be relevant to certain persons in light of their
particular circumstances. This discussion is based upon the Code, existing,
temporary and proposed regulations promulgated thereunder and administrative and
    
                                       92
<PAGE>   94
 
   
judicial decisions, all of which are subject to change, possibly with
retroactive effect. In addition, this discussion does not address the effect of
any state, local or foreign tax laws. Each person contemplating participation in
the Option Program should consult his or her tax advisor with respect to the tax
consequences of such participation.
    
 
   
     The issuance of Company Stock Options and Company SARs upon cancellation of
DuPont Options and DuPont SARs will not be a taxable event to the holders of
DuPont Options and DuPont SARs. The Company Stock Options received upon
cancellation of DuPont Options which are nonqualified stock options will be
nonqualified Company Stock Options. Generally, a modification of an incentive
stock option results in the loss of incentive stock option status of such
option. However, under certain circumstances set forth in the Code and
applicable regulations (including proposed regulations), an incentive stock
option may be modified without loss of the incentive stock option status. In
particular, the issuance of an option upon cancellation of another option by
reason of a certain type of a corporate transaction will not result in loss of
incentive stock option status. The Separation constitutes such a corporate
transaction and, accordingly, assuming the applicable requirements of the Code
are satisfied, the issuance of a Company Stock Option upon cancellation of a
DuPont Option by reason of the Separation will not result in loss of incentive
stock option status.
    
 
COMPENSATION OF EXECUTIVE OFFICERS
 
     During fiscal 1997, the executive officers named in the table included
under this caption were employees of DuPont and participated in DuPont's
executive benefit plans, as indicated in the tables.
 
     The following table sets forth the aggregate compensation paid to the
Company's chief executive officer and four other most highly compensated
executive officers (the "Named Officers") by DuPont or its subsidiaries during
fiscal 1997.
 
                         SUMMARY COMPENSATION TABLE(1)
 
<TABLE>
<CAPTION>
                                                                                 LONG-TERM
                                             ANNUAL COMPENSATION                COMPENSATION
                                   ---------------------------------------   ------------------
                                                                OTHER              SHARES
NAME AND                                                       ANNUAL            UNDERLYING          ALL OTHER
PRINCIPAL POSITION          YEAR    SALARY     BONUS(2)    COMPENSATION(3)   OPTIONS GRANTED(4)   COMPENSATION(5)
- ------------------          ----   --------   ----------   ---------------   ------------------   ---------------
<S>                         <C>    <C>        <C>          <C>               <C>                  <C>
Archie W. Dunham..........  1997   $667,500   $1,450,000       $33,075            290,376             $39,950
  President, Chief
  Executive Officer and
  Director
Gary W. Edwards...........  1997    431,320      725,000        24,044            133,200              25,715
  Executive Vice
  President, Refining,
  Marketing, Supply and
  Transportation
Robert E. McKee III.......  1997    374,400      718,000        16,612            126,700              22,247
  Executive Vice
  President, Exploration
  Production
Robert W. Goldman.........  1997    236,700      292,000         1,513             38,600              13,958
  Senior Vice President,
  Finance, and Chief
  Financial Officer
Rick A. Harrington........  1997    229,500      325,000         4,703             59,802              13,598
  Senior Vice President,
  Legal, and General
  Counsel
</TABLE>
 
- ---------------
 
(1) Columns required by the rules and regulations of the Securities and Exchange
    Commission that contain no entries have been omitted.
 
                                       93
<PAGE>   95
 
(2) On average, approximately 25 percent of variable compensation (i.e., bonus)
    was paid in DuPont common stock.
 
(3) Other Annual Compensation consists solely of the reimbursement for the
    payment of taxes.
 
(4) Shares have been adjusted to reflect a 2-for-1 DuPont common stock split in
    1997. 1997 includes shares underlying both "Bicentennial" options (larger
    than normal grants to reflect the higher risk due to significant stock price
    hurdles and forfeiture provisions) and for Messrs. Dunham and Harrington,
    reload options totaling 3,376 and 902, respectively. The totals for Messrs.
    Goldman and Harrington each include 200 options granted under the DuPont
    Shares program. See Notes 1, 2 and 3 of the Option Grants Table and Note 1
    of the Aggregated Option Exercises and Year-End Option Values Table for more
    detail on the "Bicentennial" options, reload feature and DuPont Shares
    program.
 
(5) Includes the Company's matching contributions made pursuant to the Company's
    thrift plans, including the following amounts credited under the related
    savings restoration plan in 1997: Mr. Dunham, $30,450; Mr. Edwards, $16,215;
    Mr. McKee, $12,747; Mr. Goldman, $4,458 and Mr. Harrington, $4,098.
 
     The following table sets forth information as of December 31, 1997
regarding DuPont Options granted to the Named Officers during fiscal 1997.
 
                              OPTION GRANTS TABLE
 
<TABLE>
<CAPTION>
                                                                                    POTENTIAL REALIZABLE VALUE
                                                                                      AT ASSUMED ANNUAL RATES
                                                                                     OF STOCK APPRECIATION FOR
                                         INDIVIDUAL OPTION GRANTS IN 1997                 OPTION TERM(5)
                                  -----------------------------------------------   ---------------------------
                                  NUMBER OF      PERCENT
                                    SHARES       OF TOTAL
                                  UNDERLYING     OPTIONS
                                   OPTIONS       GRANTED    EXERCISE   EXPIRATION
NAME                               GRANTED       IN 1997    PRICE(4)      DATE        5%(6)          10%(7)
- ----                              ----------     --------   --------   ----------   ----------   --------------
<S>                               <C>            <C>        <C>        <C>          <C>          <C>
Archie W. Dunham................   287,000(1)      2.87%     $52.50     1/28/07      $     0      $12,018,125
                                     1,688(2)      0.02%      59.22     1/29/01       17,355           36,345
                                     1,688(2)      0.02%      59.22     1/23/00       11,447           24,107
Gary W. Edwards.................   133,200(1)      1.33%      52.50     1/28/07            0        5,577,750
Robert E. McKee III.............   126,700(1)      1.27%      52.50     1/28/07            0        5,305,563
Robert W. Goldman...............    38,400(1)      0.38%      52.50     1/28/07            0        1,608,000
                                       200(3)      *          52.50     1/28/07        6,650           16,750
Rick A. Harrington..............    58,700(1)      0.59%      52.50     1/28/07            0        2,458,063
                                       902(2)      0.01%      56.28     1/23/00        7,639           15,982
                                       200(3)      *          52.50     1/28/07        6,650           16,750
</TABLE>
 
- ---------------
 
(1) These DuPont Options (the "Bicentennial" Options) may not be exercised
    earlier than 12 months from date of grant and have a term of ten years.
    Subject to the preceding sentence, DuPont Options with respect to 50 percent
    of the DuPont common stock subject thereto will become exercisable if the
    DuPont common stock price reaches $75 per share and the balance will be
    exercisable if the DuPont common stock reaches $90 per share, but the DuPont
    Options will be forfeited if these stock price thresholds are not met within
    five years of grant date. The $75 threshold was met on April 17, 1998.
 
(2) These DuPont Options are subject to reload options which were granted when a
    previously granted option was exercised. These reload options have not
    increased the combined number of shares and options held by the executive
    prior to exercise. The reload feature was added in 1997 to accelerate stock
    ownership by executives. The shares of DuPont common stock received upon
    exercise of the original DuPont Options (not including shares withheld to
    satisfy income tax obligations) may not be transferred for a period of five
    years. Reload options are granted at fair market value of a share of DuPont
    common stock on the date of exercise of the original option, have a term
    equal to the remaining term of the original DuPont Options and are
    exercisable six months from the date of grant.
 
(3) These DuPont Options were awarded under the DuPont Shares program. Under
    this program, substantially all employees received a one-time grant to
    acquire shares of DuPont common stock at the fair market value as of the
    date of grant. These DuPont Options became exercisable when the price of
 
                                       94
<PAGE>   96
 
    DuPont common stock reached $75 per share on April 17, 1998. Similarly,
    these DuPont Options have a term of 10 years.
 
(4) The exercise price is the average of the high and low prices of DuPont
    common stock as reported on the NYSE-Composite Transactions Tape on the date
    of grant.
 
(5) Represents total appreciation over the exercise price at the assumed annual
    appreciation rates of 5 percent and 10 percent compounded annually for the
    term of the DuPont Options.
 
(6) Reflects forfeiture of all Bicentennial options granted on January 29, 1997,
    because the $75 and $90 stock price thresholds would not be met within five
    years of grant date based on the assumed rate of stock price appreciation.
    Also see Note 1 above.
 
(7) Reflects forfeiture of 50 percent of the Bicentennial options granted on
    January 29, 1997, because the $90 stock price threshold would not be met
    within five years of grant date based on the assumed rate of stock price
    appreciation. Also see Note 1 above.
 
 *  Represents less than 0.01 percent of the total options granted under the
    DuPont Shares program.
 
     The following table sets forth information regarding the exercise of DuPont
Options during the 1997 fiscal year by each of the Named Officers and the 1997
fiscal year end value of all unexercised DuPont Options held by each of the
Named Officers.
 
                AGGREGATED OPTION EXERCISES IN LAST FISCAL YEAR
                           AND YEAR-END OPTION VALUES
 
<TABLE>
<CAPTION>
                                                        NUMBER OF SHARES
                                                           UNDERLYING               VALUE OF UNEXERCISED
                                                     UNEXERCISED OPTIONS AT         IN-THE-MONEY OPTIONS
                                                      FISCAL YEAR END 1997       AT FISCAL YEAR END 1997(2)
                         SHARES                    ---------------------------   ---------------------------
                       ACQUIRED ON      VALUE
        NAME            EXERCISE     REALIZED(1)   EXERCISABLE   UNEXERCISABLE   EXERCISABLE   UNEXERCISABLE
        ----           -----------   -----------   -----------   -------------   -----------   -------------
<S>                    <C>           <C>           <C>           <C>             <C>           <C>
Archie W. Dunham.....    10,648       $430,620       557,552        290,376      $17,407,434    $2,173,286
Gary W. Edwards......    13,153        984,009       301,246        133,200       10,013,260     1,007,325
Robert E. McKee
  III................        --             --       233,048        126,700        7,428,204       958,169
Robert W. Goldman....        --             --        73,906         38,600        2,361,524       291,913
Rick A. Harrington...     7,657        543,945        64,500         59,802        1,924,256       448,842
</TABLE>
 
- ---------------
 
(1) Represents the pre-tax gain, which is the difference between the market
    value of the shares on the date of exercise of the DuPont Options and the
    exercise price. The reload feature prohibits distribution of any net
    after-tax gains, as described in Note 2 of the Option Grants Table. The
    gains after taxes are converted to DuPont common stock that may not be sold
    or transferred for at least five years. One hundred percent of the gains for
    Mr. Dunham and 17 percent for Mr. Harrington resulted from the reload
    feature.
 
(2) Represents the closing price for DuPont common stock on December 31, 1997 of
    $60.0625 less the exercise price for all outstanding exercisable and
    unexercisable DuPont Options for which the exercise price is less than such
    closing price.
 
RETIREMENT BENEFITS
 
     Retirement benefits for Company employees under the DuPont Pension and
Retirement Plan are based on an employee's years of service and average monthly
pay during the employee's three highest-paid years. "Average monthly pay" for
this purpose includes regular compensation and 100 percent of annual variable
compensation payments, but excludes other bonuses and compensation in excess of
limits imposed by the Internal Revenue Code of 1986, as amended (the "Code").
The Code limits the amount of annual benefits which may be payable from the
pension trust. Retirement benefits in excess of these limitations are paid from
the Company's general revenues under separate, nonfunded pension restoration
plans.
 
                                       95
<PAGE>   97
 
     The table below illustrates the straight-life annuity amounts payable under
the DuPont Pension and Retirement Plan and retirement restoration plans to
Company employees retiring at age 65 in 1998. These amounts reflect an offset
based on Social Security benefits. The current years of service credited for
retirement benefits for the Named Officers are as follows: 32 years for A. W.
Dunham, 35 years for G. W. Edwards, 31 years for R. E. McKee, 33 years for R. W.
Goldman and 18 years for R. A. Harrington.
 
<TABLE>
<CAPTION>
                                                          ESTIMATED ANNUAL RETIREMENT
                 SALARY AND                              BENEFITS BASED ON SERVICE OF:
                  VARIABLE                     -------------------------------------------------
                COMPENSATION                    30 YEARS     35 YEARS     40 YEARS     45 YEARS
                ------------                   ----------   ----------   ----------   ----------
<S>                                            <C>          <C>          <C>          <C>
$ 325,000....................................  $  149,000   $  174,000   $  200,000   $  226,000
   900,000...................................     425,000      496,000      568,000      640,000
 1,475,000...................................     701,000      818,000      936,000    1,054,000
 2,050,000...................................     977,000    1,140,000    1,304,000    1,468,000
 2,625,000...................................   1,253,000    1,462,000    1,672,000    1,882,000
</TABLE>
 
1998 STOCK AND PERFORMANCE INCENTIVE PLAN OF THE COMPANY
 
     GENERAL
 
     The Company has adopted the 1998 Stock and Performance Incentive Plan of
Conoco Inc. (the "Plan") to reward (i) key employees of the Company
("Employees"), (ii) directors of the Company who are not employees of the
Company ("Nonemployee Directors") and (iii) nonemployee consultants and other
independent contractors (collectively, "Independent Contractors") of the
Company. The primary objectives of the Plan are to attract and retain the
services of key Employees, Nonemployee Directors and Independent Contractors and
to further the interests of the Company and its stockholders by providing
incentives in the form of awards to key Employees, qualified Nonemployee
Directors and qualified Independent Contractors who can contribute materially to
the success and profitability of the Company. The following summary of certain
provisions of the Plan does not purport to be complete and is qualified in its
entirety by reference to the Plan, a copy of which is filed as an exhibit to the
Registration Statement of which this Prospectus is a part and is incorporated
herein by reference.
 
     Awards to Employees ("Employee Awards") and awards to Independent
Contractors ("Independent Contractor Awards") generally are treated the same
under the Plan, and the discussion of Employee Awards herein applies, except as
noted, equally to Independent Contractor Awards. Employee Awards may be in the
form of (i) Company Stock Options, (ii) Company SARs, (iii) restricted or
unrestricted grants of Class A Common Stock or units denominated in Class A
Common Stock (collectively, "Stock Awards"), (iv) grants denominated in cash
("Cash Awards") and (v) grants denominated in cash, Class A Common Stock, units
denominated in Class A Common Stock or any other property, the vesting of which
grants are made subject to the attainment of one or more performance goals
("Performance Awards"). Awards to Nonemployee Directors under the Plan
("Director Awards" and, collectively with the Employee Awards and the
Independent Contractor Awards, the "Awards") will be in the form of grants of
Company Stock Options and Stock Awards.
 
     The Plan is not qualified under Section 401(a) of the Code and is not
subject to the provisions of the Employee Retirement Income Security Act of
1974, as amended ("ERISA").
 
     PARTICIPATION AND ELIGIBILITY
 
     Key Employees eligible for Employee Awards under the Plan are employees
holding positions of responsibility with the Company and whose performance, in
the judgment of the Compensation Committee, can have a significant effect on the
success of the Company, as well as individuals who are expected to become
Employees within six months of the date of grant. Directors eligible for
Director Awards under the Plan are those who are not employees of the Company or
DuPont. Independent Contractors eligible for Awards under the Plan are those
providing, or who will provide, services to the Company. Employees who have
previously received DuPont Options and DuPont SARs may also participate through
the Option Program, as described above under "-- Treatment of Outstanding Stock
Options and Stock Appreciation Rights."
 
                                       96
<PAGE>   98
 
     SHARES SUBJECT TO THE PLAN
 
   
     The Company has reserved the greater of (a) 20 million shares of Class A
Common Stock or (b) shares of Class A Common Stock equal to 3.3 percent of the
number of shares of Common Stock outstanding from time to time, for purposes of
the Plan. No more than 7 million shares of Class A Common Stock shall be
available for ISOs (defined below). No Awards shall be granted under the Plan
with respect to Class B Common Stock. The number of shares authorized to be
issued under the Plan is subject to adjustment as described under "-- Certain
Provisions Applicable to the Plan and the 1998 Plan -- Adjustments" below.
Shares subject to Awards that are forfeited or terminated, exchanged for Awards
that do not involve Class A Common Stock or expire unexercised, or are settled
in cash in lieu of Class A Common Stock, or otherwise such that the shares
covered thereby are not issued, again become available for Awards. Awards that
are issued upon cancellation of an award previously held by an Employee by
reason of the Employee's employment while the Company was wholly owned by
DuPont, as described above under "-- Treatment of Outstanding Stock Options and
Stock Appreciation Rights," shall not count against the limitations on Class A
Common Stock available for Awards.
    
 
     TERMS, CONDITIONS AND LIMITATIONS OF AWARDS
 
     Employee Awards
 
     The Compensation Committee will determine the type or types of Employee
Awards made under the Plan and will designate the Employees who are to be the
recipients of such awards. An Employee Award shall be embodied in an agreement
(an "Award Agreement"), which will contain such terms, conditions and
limitations as determined by the Compensation Committee. Employee Awards may be
granted singly, in combination or in tandem. Employee Awards may also be made in
combination or in tandem with, in replacement of, or as alternatives to, grants
or rights under the Plan or any other employee plan of the Company or any of its
subsidiaries, including any acquired entity. An Employee Award may provide for
the grant or issuance of additional, replacement or alternative Employee Awards
upon the occurrence of specified events, including the exercise of the original
Employee Award. At the discretion of the Compensation Committee, an Employee may
be offered an election to substitute an Employee Award for another Employee
Award or Employee Awards of the same or different type. All or part of an
Employee Award may be subject to conditions established by the Compensation
Committee, which may include, but are not limited to, continuous service with
the Company, achievement of specific business objectives, increases in specified
indices, attainment of specified growth rates and other comparable measurements
of performance. Upon the termination of employment by an Employee, any
unexercised, deferred, unvested or unpaid Employee Awards will be treated as set
forth in the applicable Award Agreement.
 
     The Compensation Committee may make an Award to an individual who it
expects to become an Employee of the Company within the next six months, with
such Award being subject to the individual actually becoming an Employee within
such time period and to such other terms and conditions as may be established by
the Compensation Committee.
 
     Company Stock Options. A Company Stock Option granted pursuant to the Plan
may consist of either an incentive stock option ("ISO") that complies with the
requirements of Section 422 of the Code or a non-qualified stock option ("NQSO")
that does not comply with such requirements. Independent Contractor Awards may
not include ISOs. ISOs and NQSOs must have an exercise price per share that is
not less than the Fair Market Value (as defined in the Plan) of the Class A
Common Stock on the date of grant; provided, however, that "Fair Market Value"
in the case of any Award made in connection with the Offerings means the price
per share of Class A Common Stock as set forth in the cover page of this
Prospectus.
 
     Subject to the limitations described under "-- Certain Provisions
Applicable to the Plan and the 1998 Plan -- Exercise of Company Stock Options"
below, the terms, conditions and limitations applicable to any Company Stock
Options, including the term of any Company Stock Options and the date or dates
upon which they become exercisable, will be determined by the Compensation
Committee.
 
                                       97
<PAGE>   99
 
     Company SARs. A Company SAR may be granted under the Plan to the holder of
a Company Stock Option with respect to all or a portion of the shares of Class A
Common Stock subject to such Company Stock Option or may be granted separately.
The terms, conditions and limitations applicable to any Company SARs, including
the term of any Company SARs and the date or dates upon which they become
exercisable, will be determined by the Compensation Committee.
 
     Stock Awards. Stock Awards consist of restricted and non-restricted grants
of Class A Common Stock or units denominated in Class A Common Stock. The terms,
conditions and limitations applicable to any Stock Awards will be determined by
the Compensation Committee. Without limiting the foregoing, rights to dividends
or dividend equivalents may be extended to and made part of any Stock Award in
the discretion of the Compensation Committee. The Compensation Committee may
also establish rules and procedures for the crediting of interest or other
earnings on deferred cash payments and dividend equivalents for Stock Awards.
 
     Cash Awards. Cash Awards consist of grants denominated in cash. The terms,
conditions and limitations applicable to any Cash Awards will be determined by
the Compensation Committee.
 
     Performance Awards. Performance Awards consist of grants made to an
Employee subject to the attainment of one or more performance goals. A
Performance Award will be paid, vested or otherwise deliverable solely upon the
attainment of one or more pre-established, objective performance goals
established by the Compensation Committee prior to the earlier of (i) 90 days
after the commencement of the period of service to which the performance goals
relate and (ii) the lapse of 25 percent of the period of service, and in any
event while the outcome is substantially uncertain. A performance goal may be
based upon one or more business criteria that apply to the Employee, one or more
business units of the Company or the Company as a whole, and may include any of
the following: increased revenue, net income, stock price, market share,
earnings per share, return on equity, return on assets, decrease in costs,
shareholder value, net cash flow, total shareholder return, return on capital,
return on investors' capital, operating income, funds from operations, cash
flow, cash from operations, after-tax operating income, reserve addition,
proceeds from dispositions, production volumes, refinery runs, net cash flow
before financing activities, reserve replacement ratio, finding and development
costs, refinery utilizations and total market value. Prior to the payment of any
compensation based on the achievement of such performance goals, the
Compensation Committee must certify in writing that the applicable performance
goals and any of the material terms thereof were, in fact, satisfied. Subject to
the foregoing, the terms, conditions and limitations applicable to any
Performance Awards will be determined by the Compensation Committee.
 
   
     Certain Limitations. The Plan contains certain limitations with respect to
Awards that may be made thereunder. In particular, the Plan provides that the
following limitations shall apply to any Employee Awards (but not to any
Independent Contractor Awards) made thereunder: (i) no participant may be
granted, during any calendar year, Employee Awards consisting of Company Stock
Options or Company SARs that are exercisable for or relate to more than 2.5
million shares of Class A Common Stock; (ii) no participant may be granted,
during any calendar year, Employee Awards consisting of Stock Awards covering or
relating to more than 150,000 shares of Class A Common Stock (the limitation set
forth in this clause (ii), together with the limitation set forth in clause (i)
above, being hereinafter collectively referred to as the "Stock-Based Awards
Limitations"); and (iii) no participant may be granted Employee Awards
consisting of cash or in any other form permitted under the Plan (other than
Employee Awards consisting of Company Stock Options or Company SARs or Stock
Awards) in respect of any calendar year having a value determined on the date of
grant in excess of $7.5 million.
    
 
     Director Awards
 
     For information concerning awards to be granted to Directors, see
"-- Election and Compensation of Directors."
 
     CHANGE IN CONTROL
 
   
     Award Agreements with respect to Awards granted under the Plan are expected
to provide that in the event of certain terminations of a participant's
employment following a "Change in Control" of the Company
    
                                       98
<PAGE>   100
 
   
(as defined in the Award Agreement), Awards held by such participant that were
not previously vested or exercisable will become fully vested and exercisable
and generally remain exercisable for the remainder of their term.
    
 
1998 KEY EMPLOYEE STOCK PERFORMANCE PLAN
 
     GENERAL
 
     The Company also has adopted the 1998 Key Employee Stock Performance Plan
of Conoco Inc. (the "1998 Plan") to attract and retain the services of Employees
and to further the interests of the Company and its stockholders by enhancing
the proprietary and personal interests of Employees in the success and
profitability of the Company. The following summary of certain provisions of the
1998 Plan does not purport to be complete and is qualified in its entirety by
reference to the 1998 Plan, a copy of which is filed as an exhibit to the
Registration Statement of which this Prospectus is a part and is incorporated
herein by reference.
 
     Awards to Employees under the 1998 Plan may be in the form of Company Stock
Options and Company SARs. The 1998 Plan is not qualified under Section 401(a) of
the Code and is not subject to the provisions of ERISA.
 
     PARTICIPATION AND ELIGIBILITY
 
     All Employees are eligible for Awards under the 1998 Plan. Awards may also
be granted to individuals who are expected to become Employees within six months
of the date of grant. Employees are selected to participate in the 1998 Plan
through the grant of Awards by the Compensation Committee in its sole
discretion. Employees who have previously received DuPont Options and DuPont
SARs may also participate through the Option Program, as described above under
"-- Treatment of Outstanding Stock Options and Stock Appreciation Rights."
 
     SHARES SUBJECT TO THE 1998 PLAN
 
   
     The Company has reserved the greater of (a) 18 million shares of Class A
Common Stock or (b) shares of Class A Common Stock equal to 3.0 percent of the
number of shares of Common Stock outstanding from time to time, for purposes of
the 1998 Plan. No more than 6 million shares of Class A Common Stock shall be
available for ISOs. No Awards shall be granted under the 1998 Plan with respect
to Class B Common Stock. The number of shares authorized to be issued under the
1998 Plan is also subject to adjustment as described under "-- Certain
Provisions Applicable to the Plan and the 1998 Plan -- Adjustments" below.
Shares subject to Awards that are forfeited or terminated, exchanged for Awards
that do not involve Class A Common Stock or expire unexercised, or are settled
in cash in lieu of Class A Common Stock, or otherwise such that the shares
covered thereby are not issued, again become available for Awards. Awards that
are issued upon cancellation of an award previously held by an Employee by
reason of the Employee's employment while the Company was wholly owned by
DuPont, as described above under "-- Treatment of Outstanding Stock Options and
Stock Appreciation Rights," shall not count against the limitations on Class A
Common Stock available for Awards.
    
 
     TERMS, CONDITIONS AND LIMITATIONS OF AWARDS
 
     The Compensation Committee will determine the type or types of Awards made
under the 1998 Plan and will designate the Employees who are to be the
recipients of such awards. An Award shall be embodied in an Award Agreement,
which will contain such terms, conditions and limitations as determined by the
Compensation Committee. Awards may be granted singly, in combination or in
tandem. Awards may also be made in combination or in tandem with, in replacement
of, or as alternatives to, grants or rights under the 1998 Plan or any other
employee plan of the Company or any of its subsidiaries, including any acquired
entity. An Award may provide for the grant or issuance of additional,
replacement or alternative Awards upon the occurrence of specified events,
including the exercise of the original Award. At the discretion of the
Compensation Committee, an Employee may be offered an election to substitute an
Award for another Award or Awards of the same or different type. Upon the
termination of employment by an Employee, any
 
                                       99
<PAGE>   101
 
unexercised, deferred, unvested or unpaid Awards will be treated as set forth in
the applicable Award Agreement.
 
     The Compensation Committee may make an Award to an individual who it
expects to become an Employee of the Company within the next six months, with
such Award being subject to the individual actually becoming an Employee within
such time period and to such other terms and conditions as may be established by
the Compensation Committee.
 
     Company Stock Options. A Company Stock Option granted pursuant to the 1998
Plan may consist of either an ISO or a NQSO. ISOs and NQSOs must have an
exercise price per share that is not less than the Fair Market Value (as defined
in the 1998 Plan) of the Class A Common Stock on the date of grant. Subject to
the limitations described under "Certain Provisions Applicable to the Plan and
the 1998 Plan -- Exercise of Company Stock Options" below, the terms, conditions
and limitations applicable to any Company Stock Options, including the term of
any Company Stock Options and the date or dates upon which they become
exercisable, will be determined by the Compensation Committee.
 
     Company SARs. A Company SAR may be granted under the 1998 Plan to the
holder of a Company Stock Option with respect to all or a portion of the shares
of Class A Common Stock subject to such Company Stock Option or may be granted
separately. The terms, conditions and limitations applicable to any Company
SARs, including the term of any Company SARs and the date or dates upon which
they become exercisable, will be determined by the Compensation Committee.
 
   
     Award Limit. The 1998 Plan provides that no participant may be granted,
during any calendar year, Awards that are exercisable for more than 200,000
shares of Class A Common Stock (the "Award Limit").
    
 
     CHANGE IN CONTROL
 
   
     Award Agreements with respect to Awards granted under the 1998 Plan are
expected to provide that in the event of certain terminations of a participant's
employment following a "Change in Control" of the Company (as defined in the
Award Agreement), Awards held by such participant that were not previously
vested or exercisable will become fully vested and exercisable and generally
remain exercisable for the remainder of their term.
    
 
CERTAIN PROVISIONS APPLICABLE TO THE PLAN AND THE 1998 PLAN
 
     ADMINISTRATION
 
     The Compensation Committee will administer the Plan and the 1998 Plan. The
Compensation Committee has full and exclusive power to administer the Plan and
the 1998 Plan and take all actions specifically contemplated thereby or
necessary or appropriate in connection with the administration thereof. Except
insofar as the Plan relates to Nonemployee Directors, the Compensation Committee
has the full and exclusive power to interpret the Plan and the 1998 Plan and to
adopt such rules, regulations and guidelines for carrying out the Plan and the
1998 Plan as the Compensation Committee may deem necessary or proper in keeping
with the objectives thereof. The Compensation Committee may, in its discretion,
extend or accelerate the exercisability of, accelerate the vesting of or
eliminate or make less restrictive any restrictions contained in any Employee
Award granted under the Plan or any Award granted under the 1998 Plan, waive any
restriction or other provision of the Plan (insofar as it relates to Employee
Awards) or the 1998 Plan or in any Employee Award granted under the Plan or
Award granted under the 1998 Plan or otherwise amend or modify any Employee
Award granted under the Plan or Award granted under the 1998 Plan in any manner
that is either (i) not adverse to the Employee holding such Award or (ii)
consented to by such Employee. The Compensation Committee may delegate to the
chief executive officer and other senior officers of the Company its duties
under the Plan or the 1998 Plan. The Compensation Committee also may engage or
authorize the engagement of third-party administrators to carry out
administrative functions under the Plan or the 1998 Plan. The Compensation
Committee may also correct any defect or supply any omission or reconcile any
inconsistency in the Plan or the 1998 Plan or in any Employee Award granted
under the Plan or Award granted under the 1998 Plan. Any decision of the
Compensation Committee in the interpretation and
 
                                       100
<PAGE>   102
 
administration of the Plan and the 1998 Plan shall lie within its sole and
absolute discretion and shall be final, conclusive and binding on all parties
concerned.
 
     No member of the Compensation Committee or officer of the Company to whom
the Compensation Committee has delegated authority in accordance with the Plan
or the 1998 Plan will be held liable for anything done or omitted to be done by
him or her, by any member of the Compensation Committee or by any officer of the
Company in connection with the performance of any duties under such Plan, except
for his or her own willful misconduct or as expressly provided by statute.
 
     EXERCISE OF COMPANY STOCK OPTIONS
 
     The exercise price of any Company Stock Option must be paid in full at the
time the Company Stock Option is exercised in cash or, if permitted by the
Compensation Committee and elected by the participant, by means of tendering
Class A Common Stock or surrendering another Award (including restricted stock).
The Compensation Committee will determine acceptable methods for tendering Class
A Common Stock or other Awards by a participant to exercise a Company Stock
Option. Unless otherwise provided in the applicable Award Agreement, in the
event shares of restricted stock are tendered as consideration for the exercise
of a Company Stock Option granted under the Plan, a number of the shares issued
upon the exercise of such Company Stock Option, equal to the number of shares of
restricted stock used as consideration therefor, will be subject to the same
restrictions as the restricted stock so submitted as well as any other
restrictions that may be imposed by the Compensation Committee. The Compensation
Committee may adopt additional rules and procedures regarding the exercise of
Company Stock Options from time to time, provided that such rules and procedures
are not inconsistent with the provisions of this paragraph.
 
     DEFERRAL OF AWARD PAYMENTS
 
     With the approval of the Compensation Committee, payments in respect of
Awards may be deferred, either in the form of installments or a future lump sum
payment. Any deferred payment of an Award, whether elected by the participant or
specified by the Award Agreement or by the Compensation Committee, may be
forfeited if and to the extent that the Award Agreement so provides.
 
     CASH-OUT OF AWARDS
 
     At the discretion of the Compensation Committee, an Award that is a Company
Stock Option or Company SAR may be settled by a cash payment equal to the
difference between the Fair Market Value per share of Class A Common Stock on
the date of exercise and the exercise price of the Award, multiplied by the
number of shares with respect to which the Award is exercised.
 
     AWARDS ISSUED UPON CANCELLATION OF DUPONT AWARDS
 
     For a description of the issuance of Company Stock Options and Company SARs
upon cancellation of DuPont Stock Options and DuPont SARs pursuant to the Plan
and the 1998 Plan, see "-- Treatment of Outstanding Stock Options and Stock
Appreciation Rights."
 
     ASSIGNMENT OF INTERESTS PROHIBITED
 
     Unless otherwise determined by the Compensation Committee and provided in
the applicable Award Agreement, no Award or any other benefit under the Plan or
the 1998 Plan shall be assignable or otherwise transferable except by will or
the laws of descent and distribution or pursuant to a qualified domestic
relations order as defined by the Code or Title I of ERISA, or the rules
thereunder. The Compensation Committee may prescribe and include in applicable
Award Agreements other restrictions on transfer. Any attempted assignment of an
Award or any other benefit under the Plan or the 1998 Plan in violation thereof
will be null and void.
 
                                       101
<PAGE>   103
 
     ADJUSTMENTS
 
     In the event of any subdivision or consolidation of outstanding shares of
Class A Common Stock, declaration of a stock dividend payable in shares of Class
A Common Stock or other stock split, each of the Plan and the 1998 Plan provides
for the Compensation Committee to make appropriate, proportionate adjustments to
(i) the number of shares of Class A Common Stock reserved under such Plan, (ii)
the number of shares of Class A Common Stock covered by outstanding Awards,
(iii) the exercise or other price in respect of such Awards, (iv) the
appropriate Fair Market Value and other price determinations for such Awards and
(v) the Stock-Based Awards Limitations (with respect to the Plan) or the Award
Limit (with respect to the 1998 Plan). Furthermore, in the event of any other
recapitalization or capital reorganization of the Company, any consolidation or
merger of the Company with another corporation or entity, the adoption by the
Company of any plan of exchange affecting the Class A Common Stock or any
distribution to holders of Class A Common Stock of securities or property (other
than normal cash dividends or stock dividends), the Board will make appropriate
adjustments to the amounts or other items referred to in clauses (ii), (iii),
(iv) and (v) above to give effect to such transactions, but only to the extent
necessary to maintain the proportionate interest of the holders of the Awards
and to preserve, without increasing, the value thereof. In the event of a
corporate merger, consolidation, acquisition of property or stock, separation,
reorganization or liquidation, the Board may (x) issue or assume Awards by means
of substitution of new Awards, as appropriate, for previously issued Awards or
assume previously issued Awards as part of such adjustment or (y) cancel Awards
that are Company Stock Options or Company SARs and give the participants who are
the holders of such Awards notice and opportunity to exercise for 30 days prior
to such cancellation.
 
     AMENDMENT, MODIFICATION AND TERMINATION
 
     The Board may amend, modify, suspend or terminate the Plan or the 1998 Plan
for the purpose of addressing any changes in legal requirements or for any other
purpose permitted by law, except that (i) no amendment that would impair the
rights of any participant with respect to any outstanding Award may be made
without the consent of such participant and (ii) no amendment legally requiring
stockholder approval will be effective until such approval has been obtained.
 
     RESTRICTIONS
 
     Certificates evidencing shares of Class A Common Stock delivered pursuant
to the Plan or the 1998 Plan may be subject to stop transfer orders and other
restrictions as the Compensation Committee may deem advisable under the rules,
regulations and other requirements of the Commission, applicable securities
exchange or transaction reporting system, and any applicable federal or state
securities law. The Compensation Committee may cause a legend or legends to be
placed upon such certificates (if any) to make appropriate reference to such
restrictions.
 
     TAX WITHHOLDING
 
     The Company or its designated third-party administrator will have the right
to deduct applicable taxes from any Employee Award payment under the Plan or any
Award payment under the 1998 Plan and withhold, at the time of delivery (or
vesting, for purposes of the Plan) of cash or shares of Class A Common Stock
under such Plan, an appropriate amount of cash or number of shares of Class A
Common Stock, or combination thereof, for the payment of taxes. The Compensation
Committee may also permit withholding to be satisfied by the transfer to the
Company of shares of Class A Common Stock previously owned by the holder of such
Award for which withholding is required. The Compensation Committee may provide
for loans, on either a short-term or demand basis, from the Company to an
Employee or Independent Contractor to permit the payment of taxes required by
law.
 
     UNFUNDED PLAN
 
     Both the Plan and the 1998 Plan will be unfunded. Any bookkeeping accounts
that are established with respect to participants for purposes of the Plan or
the 1998 Plan will be used merely as a bookkeeping
 
                                       102
<PAGE>   104
 
convenience. The Company is not required to segregate any assets for purposes of
the Plan or the 1998 Plan or awards thereunder, nor will either Plan be
construed as providing for such segregation, nor will the Company, the Board or
the Compensation Committee be deemed to be a trustee of any benefit granted
under either Plan. Any liability or obligation of the Company to any participant
under the Plan or the 1998 Plan will be based solely on any contractual
obligations that may be created by such Plan and any Award Agreement, and no
such liability or obligation of the Company will be deemed to be secured by any
pledge or other encumbrance on any property of the Company. Neither the Company,
the Board nor the Compensation Committee will be required to give any security
or bond for the performance of any obligation that may be created by the Plan or
the 1998 Plan.
 
   
FEDERAL INCOME TAX CONSEQUENCES OF THE PLAN AND THE 1998 PLAN
    
 
   
     The following is a discussion of material U.S. federal income tax
consequences to participants in the Plan and the 1998 Plan. This discussion is
based on statutory provisions, Treasury regulations thereunder, judicial
decisions and rulings of the Internal Revenue Service (the "IRS") in effect on
the date hereof. This discussion does not purport to be complete, and does not
cover, among other things, state, local or foreign tax treatment of
participation in the Plan or the 1998 Plan. Furthermore, differences in
participants' financial situations may cause federal, state and local tax
consequences of participation in the Plan or the 1998 Plan to vary. Therefore,
each participant is urged to consult his or her own accountant, legal counsel or
other financial advisor regarding individual tax consequences of participation
in the Plan or the 1998 Plan.
    
 
     Nonqualified Stock Options; Stock Appreciation Rights; Incentive Stock
Options. Participants will not realize taxable income upon the grant of a NQSO
or Company SAR. Upon the exercise of a NQSO or Company SAR, the Employee or
Nonemployee Director will recognize ordinary income (subject, in the case of
Employees, to withholding by the Company) in an amount equal to the excess of
(i) the amount of cash and the Fair Market Value on the date of exercise of the
Class A Common Stock received over (ii) the exercise price (if any) paid
therefor. The Employee or Nonemployee Director will generally have a tax basis
in any shares of Class A Common Stock received pursuant to the exercise of a
Company SAR, or pursuant to the cash exercise of a NQSO, that equals the Fair
Market Value of such shares on the date of exercise. Generally, the Company will
be entitled to a deduction for U.S. federal income tax purposes that corresponds
as to timing and amount with the compensation income recognized by the
participant under the foregoing rules.
 
     Employees will not have taxable income upon the grant of an ISO. Upon the
exercise of an ISO, the Employee will not have taxable income, although the
excess of the Fair Market Value of the shares of Class A Common Stock received
upon exercise of the ISO ("ISO Stock") over the exercise price will increase the
alternative minimum taxable income of the Employee, which may cause such
Employee to incur alternative minimum tax. The payment of any alternative
minimum tax attributable to the exercise of an ISO would be allowed as a credit
against the Employee's regular tax liability in a later year to the extent the
Employee's regular tax liability is in excess of the alternative minimum tax for
that year.
 
     Upon the disposition of ISO Stock that has been held for the requisite
holding period (generally, at least two years from the date of grant and one
year from the date of exercise of the ISO), the Employee will generally
recognize capital gain (or loss) equal to the difference between the amount
received in the disposition and the exercise price paid by the Employee for the
ISO Stock. However, if an Employee disposes of ISO Stock that has not been held
for the requisite holding period (a "disqualifying disposition"), the Employee
will recognize ordinary income in the year of the disqualifying disposition to
the extent that the Fair Market Value of the ISO Stock at the time of exercise
of the ISO (or, if less, the amount realized in the case of an arm's-length
disqualifying disposition to an unrelated party) exceeds the exercise price paid
by the Employee for such ISO Stock. The Employee would also recognize capital
gain (or, depending on the holding period, additional ordinary income) to the
extent the amount realized in the disqualifying disposition exceeds the Fair
Market Value of the ISO Stock on the exercise date. If the exercise price paid
for the ISO Stock exceeds the amount realized in the disqualifying disposition
(in the case of an arm's-length disposition to an unrelated party), such excess
would ordinarily constitute a capital loss.
 
                                       103
<PAGE>   105
 
     The Company will generally not be entitled to any federal income tax
deduction upon the grant or exercise of an ISO, unless the Employee makes a
disqualifying disposition of the ISO Stock. If an Employee makes such a
disqualifying disposition, the Company will generally be entitled to a tax
deduction that corresponds as to timing and amount with the compensation income
recognized by the Employee under the rules described in the preceding paragraph.
 
     Under current rulings, if a participant transfers previously held shares of
Class A Common Stock (other than ISO Stock that has not been held for the
requisite holding period) in satisfaction of part or all of the exercise price
of a NQSO or ISO, the participant will recognize income with respect to the
Class A Common Stock received in the manner described above, but no additional
gain will be recognized as a result of the transfer of such previously held
shares in satisfaction of the NQSO or ISO exercise price. Moreover, that number
of shares of Class A Common Stock received upon exercise which equals the number
of shares of previously held Class A Common Stock surrendered therefor in
satisfaction of the NQSO or ISO exercise price will have a tax basis that
equals, and a holding period that includes, the tax basis and holding period of
the previously held shares of Class A Common Stock surrendered in satisfaction
of the NQSO or ISO exercise price. Any additional shares of Class A Common Stock
received upon exercise will have a tax basis that equals the amount of cash (if
any) paid by the participant, plus, in the case of a NQSO, the amount of
ordinary income recognized by the participant with respect to the Class A Common
Stock received.
 
     Cash Awards; Stock Unit Awards; Stock Awards. An Employee will recognize
ordinary compensation income upon receipt of cash pursuant to a Cash Award or
Performance Award or, if earlier, at the time such cash is otherwise made
available for the Employee to draw upon it. An Employee will not have taxable
income upon the grant of a Stock Award in the form of units denominated in Class
A Common Stock ("Stock Unit Award") but rather will generally recognize ordinary
compensation income at the time the Employee receives Class A Common Stock or
cash in satisfaction of such Stock Unit Award in an amount equal to the Fair
Market Value of the Class A Common Stock or cash received. In general, a
participant will recognize ordinary compensation income as a result of the
receipt of Class A Common Stock pursuant to a Stock Award or Performance Award
in an amount equal to the Fair Market Value of the Class A Common Stock when
such stock is received; provided, however, that if the stock is not transferable
and is subject to a substantial risk of forfeiture when received, the
participant will recognize ordinary compensation income in an amount equal to
the Fair Market Value of the Class A Common Stock when it first becomes
transferable or is no longer subject to a substantial risk of forfeiture, unless
the participant makes an election to be taxed on the Fair Market Value of the
Class A Common Stock when such stock is received.
 
     An Employee will be subject to withholding for federal, and generally for
state and local, income taxes at the time the Employee recognizes income under
the rules described above with respect to Class A Common Stock or cash received
pursuant to a Cash Award, Performance Award, Stock Award or Stock Unit Award.
Dividends that are received by a participant prior to the time that the Class A
Common Stock is taxed to the participant under the rules described in the
preceding paragraph are taxed as additional compensation, not as dividend
income. The tax basis of a participant in the Class A Common Stock received will
equal the amount recognized by the Employee as compensation income under the
rules described in the preceding paragraph, and the Employee's holding period in
such shares will commence on the date income is so recognized.
 
     Generally, the Company will be entitled to a deduction for U.S. federal
income tax purposes that corresponds as to timing and amount with the
compensation income recognized by the participant under the foregoing rules.
 
GLOBAL STOCK PERFORMANCE SHARING PLAN
 
     The Company has adopted the Global Stock Performance Sharing Plan (the
"Global Plan"). The number of shares of Common Stock reserved for issuance under
the Global Plan is generally subject to equitable adjustment upon the occurrence
of any stock dividend, stock split, subdivision or consolidation. Pursuant to
the Global Plan, the Company may grant nonqualified Company Stock Options and
SARs.
 
     The Global Plan will be administered by the Compensation Committee. The
Committee shall have full authority, subject to the provisions of the Global
Plan to, among other things, determine the terms and
 
                                       104
<PAGE>   106
 
conditions of Company Stock Options and SARs and prescribe, amend and rescind
rules and regulations relating to the Global Plan.
 
     Grants of Company Stock Options and SARs may be made under the Global Plan
to all employees of the Company and its present or future subsidiaries, provided
that certain management employees who receive Company Stock Options or SARs
under the 1998 Stock and Performance Incentive Plan as of the time of the
Offerings will not be granted Company Stock Options or SARs under the Global
Plan as of such time. The exercise price per share subject to a Company Stock
Option or SAR may not be less than the fair market value of a share of Class A
Common Stock on the date of grant. Company Stock Options and SARs will have a
term of not more than ten years and will become exercisable with respect to
one-third of the shares of Common Stock subject thereto on each of the first
three anniversaries of the dates of grant.
 
   
     In the event of certain terminations of a participant's employment
following a "Change of Control" of the Company (as defined in the Global Plan),
Company Stock Options and SARs held by such participant that were not previously
vested or exercisable will become fully vested and exercisable and generally
remain exercisable for the remainder of their term.
    
 
   
     The Global Plan may, at any time and from time to time, be altered,
amended, suspended or terminated by the Board of Directors, in whole or in part,
except that (i) no amendment or alteration that would adversely affect the
rights of any participant under any Award previously granted to such participant
shall be made without the consent of such participant and (ii) no amendment or
alteration shall be effective prior to its approval by the stockholders of the
Company to the extent such approval is required by applicable law.
    
 
GRANTS AS OF THE OFFERINGS
 
     The following table sets forth, with respect to (i) each Named Officer,
(ii) the nonemployee members of the Board of Directors as a group (the
"Nonemployee Director Group") and (iii) all other employees as a group ("All
Other Employees"), the outstanding grants held by such persons at the time of
the Offerings.
 
   
<TABLE>
<CAPTION>
                                                              COMPANY STOCK OPTIONS(1)
                                                              ------------------------
<S>                                                           <C>
Archie W. Dunham(2).........................................          1,364,000
Gary W. Edwards.............................................            455,000
Robert E. McKee III.........................................            455,000
Robert W. Goldman...........................................            129,000
Rick A. Harrington..........................................            129,000
Nonemployee Director Group(3) (6 persons)...................            198,500
All Other Employees(4)......................................          7,500,000
</TABLE>
    
 
- ---------------
 
   
(1) The number of Company Stock Options and Company SARs shown in this table is
    based on an estimated exercise price of $22, which is the average of the
    estimated offering price range of the Class A Common Stock of $20 and $24.
    The actual number of Company Stock Options and Company SARs will be adjusted
    to reflect the actual exercise price at the time of the Offerings. These
    Company Stock Options and Company SARs will become exercisable with respect
    to one-third of the shares of Class A Common Stock subject thereto on each
    of the first three anniversaries of the date of grant (other than Mr.
    Dunham's, whose Company Stock Options will become exercisable with respect
    to one-third of the shares subject thereto on each of the second, third and
    fourth anniversaries of the date of grant).
    
 
   
(2) Mr. Dunham will also receive Company restricted stock units with an
    aggregate value of $1.1 million, which units will vest on the third
    anniversary of the date of grant.
    
 
   
(3) The members of the Nonemployee Director Group will also receive Company
    restricted stock units with an aggregate value of $575,000, which units will
    vest on the third anniversary of the date of grant.
    
 
   
(4) The number of Company Stock Options and Company SARs held by the All Other
    Employees group has been estimated based on the approximately 12,200
    employees in the All Other Employees group.
    
 
                                       105
<PAGE>   107
 
DEFERRED COMPENSATION PLAN FOR NONEMPLOYEE DIRECTORS
 
     The Company has adopted the Deferred Compensation Plan for Nonemployee
Directors (the "Deferred Compensation Plan"). The purpose of the Deferred
Compensation Plan is to provide nonemployee directors of the Company the
opportunity to defer a portion of their compensation and to provide greater
incentives for those directors to attain and maintain the highest standards of
performance, to further align the interests of such directors with those of the
stockholders generally and to reward such directors for outstanding performance.
 
     The Deferred Compensation Plan will be administered by the Compensation
Committee. The Compensation Committee will supervise the administration and
enforcement of the Deferred Compensation Plan according to the terms and
provisions thereof and will have such powers as are necessary to accomplish the
purposes of the Deferred Compensation Plan.
 
     Under the Deferred Compensation Plan, participants may voluntarily elect to
defer all or a portion of their annual fees and other fees (including restricted
stock units granted under the Plan). An election to defer must generally be made
prior to the commencement of the fiscal year in which it will be earned; once
made, the election is generally irrevocable for the first calendar year with
respect to which the election is made. The deferred amounts will be deemed to be
invested, pursuant to the election of the participant, in Class A Common Stock
or in an interest-bearing account.
 
     Each deferral election will indicate the time (either on the date of
termination of service as a director or on the date that is five years following
such date) and form of payment for the amounts to be deferred. Distributions
will be made in cash or Class A Common Stock to the participant at the time
irrevocably selected on the deferral form, or, in the event of the participant's
death, to the participant's designated beneficiary. Upon a Change in Control of
the Company (as defined in the Deferred Compensation Plan), all deferred amounts
(including deferred restricted stock units) can be paid in full.
 
     Each participant or beneficiary will be an unsecured general creditor with
respect to any payments due and owing to such participant pursuant to the
Deferred Compensation Plan.
 
     The Board of Directors of the Company can amend or terminate the Deferred
Compensation Plan at any time, except that no amendment may be made that would
impair the rights of a participant with respect to amounts already deferred or
otherwise allocated to his account.
 
SHARES ISSUED PURSUANT TO AWARDS
 
     It is currently expected that shares of Class A Common Stock issued upon
exercise of, or otherwise pursuant to, awards granted under the Company's
benefit plans, including the Plan, the 1998 Plan and the Global Plan, will be
comprised of shares previously purchased by the Company in the open market or of
authorized but previously unissued shares. The Company currently expects that it
will periodically purchase shares in the open market so that there will be no
significant increase in the number of issued and outstanding shares of Class A
Common Stock resulting from awards granted under the Company's benefit plans.
 
SEVERANCE ARRANGEMENTS
 
     On May 10, 1998, the Company entered into a severance agreement (the
"Severance Agreement") with Archie W. Dunham. The Severance Agreement has an
initial term of three years, which term will be extended, if necessary, upon any
"Change in Control" or "Public Offering" of the Company (as each such term is
defined in the Severance Agreement) so that the Severance Agreement will expire
no earlier than 24 months after either such event. The Offerings described
herein will constitute a Public Offering for purposes of the Severance
Agreement. The Severance Agreement provides that if, during the term of the
Severance Agreement, Mr. Dunham's employment is terminated by the Company other
than for cause, or by reason of Mr. Dunham's death or disability, or if Mr.
Dunham terminates his employment for "Good Reason" (as defined in the Severance
Agreement), Mr. Dunham will be entitled to (i) a lump sum severance payment
equal to three times the sum of his base salary and previous year's bonus, (ii)
36 months of benefit continuation, (iii) a pro rata portion of the annual bonus
for which he is eligible in the year of termination and
                                       106
<PAGE>   108
 
(iv) vesting of any unvested equity-based awards from the Company. Mr. Dunham
will also be entitled to terminate his employment and receive the foregoing
benefits if, prior to the second anniversary of the occurrence of the Public
Offering or after DuPont reduces its ownership to less than 50 percent, he is
not appointed as Chairman of the Board of the Company (unless his employment had
previously terminated by reason of death, disability or for cause). Mr. Dunham
will also be entitled to receive an additional payment (a "gross-up payment")
sufficient to compensate him for the amount of any excise tax imposed on
payments made under the Severance Agreement or otherwise pursuant to Section
4999 of the Code and for any taxes imposed on such additional payment.
 
   
     The Company has established the Conoco Inc. Key Employee Severance Plan
(the "Key Employee Severance Plan"), which covers certain employees of the
Company, including Gary W. Edwards, Robert E. McKee III, Robert W. Goldman and
Rick A. Harrington. The Key Employee Severance Plan provides that if the
employment of a participant in the Key Employee Severance Plan is terminated
within two years of a "Change in Control" of the Company either by the Company
other than for "Cause" or by the participant for "Good Reason" (as such terms
are defined in the Key Employee Severance Plan), the participant will be
entitled to (i) a lump sum severance payment equal to two or three times the sum
of his base salary and previous year's bonus, (ii) 24 or 36 months of benefits
continuation and (iii) a pro rata portion of the annual bonus for which he is
eligible in the year of termination and, if necessary, a gross-up payment
sufficient to compensate the participant for the amount of any excise tax
imposed on payments made under the Key Employee Severance Plan or otherwise
pursuant to Section 4999 of the Code and for any taxes imposed on such an
additional payment. The Key Employee Severance Plan has a three-year term
commencing on May 10, 1998, which term will be extended, if necessary, upon a
Change in Control so that it expires no earlier than 24 months after such an
event. Amounts payable under the Key Employee Severance Plan will be in lieu of
any payments or benefits which may be payable to the severed employee under any
other severance plan, policy or program of the Company.
    
 
     The Company has also established both the (i) Conoco Inc. Key Employee
Temporary Severance Plan (the "Key Employee Temporary Severance Plan") and (ii)
the Conoco Inc. Temporary Severance Plan (the "Temporary Severance Plan"), each
of which covers certain employees of the Company, including the Named Officers.
Under the Key Employee Temporary Severance Plan (which expires in 2001), if the
employment of a participant is involuntarily terminated due to a reduction in
force or experiences defined adverse employment changes (including certain
relocation requirements and reductions in pay or position), the individual will
be entitled to one year's base salary and variable bonus. In the same
circumstances as is described under the Key Employee Temporary Severance Plan,
benefits payable under the Temporary Severance Plan are paid to a participant
upon termination of employment, except that benefits upon such a termination are
equal to two weeks' pay for each completed year of service, up to a maximum of
52 weeks' pay. Amounts payable under the Key Employee Temporary Severance Plan
are reduced by amounts payable under the Temporary Severance Plan.
 
                                       107
<PAGE>   109
 
                  ARRANGEMENTS BETWEEN THE COMPANY AND DUPONT
 
   
     In 1998 and prior years, there have been significant transactions between
the Company and DuPont involving services (such as natural gas and gas liquids
supply, cash management, other financial services, purchasing, legal, computer
and corporate activities). See Note 3 to the Notes to Combined Financial
Statements. For purposes of governing certain on-going relationships between the
Company and DuPont and to facilitate implementation of the Separation, the
Company and DuPont, or their respective subsidiaries, will enter into (or
continue in effect) various agreements and relationships, including those
described below. The agreements described below were negotiated in the context
of a parent-subsidiary relationship and therefore are not the result of
arm's-length negotiations between independent parties. There can be no
assurance, therefore, that such agreements, or the transactions provided for
therein, or any amendments thereof will be on terms at least as favorable to the
Company as could have been obtained from unaffiliated third parties.
    
 
     Certain agreements summarized below are included as exhibits to the
Registration Statement of which this Prospectus is a part, and the following
summaries are qualified in their entirety by reference to such exhibits which
are herein incorporated by reference.
 
RESTRUCTURING, TRANSFER AND SEPARATION AGREEMENT
 
   
     Prior to the Offerings, DuPont and the Company will enter into a
Restructuring, Transfer and Separation Agreement (the "Separation Agreement"),
which provides for, among other things, the principal transactions required to
effect the Separation and the Offerings, including the transfer to the Company
of oil and gas assets, the division between DuPont and the Company of certain
liabilities, and certain other agreements governing the relationship between
DuPont and the Company following the Separation and the Offerings.
    
 
     To effect the Separation, (i) DuPont will transfer or cause its
subsidiaries to transfer assets related to the oil and gas business (including
its equity interests in certain companies) to the Company or to a subsidiary of
the Company and the Company or its subsidiaries will assume substantially all of
the liabilities of the oil and gas business, and (ii) the Company will transfer
or cause its subsidiaries to transfer assets unrelated to the oil and gas
business (including its equity interests in certain companies) to DuPont or a
subsidiary of DuPont and DuPont or its subsidiaries will assume substantially
all of the liabilities associated with such transferred businesses. The
Separation Agreement provides that assets that cannot legally be transferred
prior to the effective date of the Separation (the "Effective Date") will be
transferred as soon as is practical following receipt of all necessary consents
of third parties and regulatory approvals. All transfers between DuPont and the
Company and their respective subsidiaries will be on an "as is, where is" basis,
and without any representations or warranties. As a result, the Company and
DuPont, as the case may be, each have agreed to bear the economic and legal
risks that any conveyances of assets are insufficient to vest in such party good
and marketable title to such assets. The parties have also agreed that following
the Offerings, DuPont and its subsidiaries (excluding the Company and its
subsidiaries) on the one hand, and the Company and its subsidiaries on the other
hand, will transfer, in some instances without additional consideration, to the
other, all assets which, subsequent to the Effective Date, the parties determine
more properly belong in the other's business.
 
   
     The Separation Agreement provides for assumptions and cross-indemnities
designed to place, as of the Effective Date with certain exceptions, sole
financial responsibility on the Company and its subsidiaries for all
liabilities, known or unknown, actual or contingent, associated with the
Company's current and historical businesses and operations (including those
conducted prior to and following DuPont's acquisition of the Company in 1981),
including the oil and gas business, the Company's former chemical business (with
limited exceptions), the Company's interest in the Pocahontas Gas Partnership,
and all of the assets transferred to the Company in connection with the
Separation, but excluding the Company's former coal business, and to place sole
financial responsibility for DuPont's other businesses with DuPont and its other
subsidiaries. Responsibility for environmental matters and claims relating to
businesses sold to Cain Chemical, including the operations at Matagorda and
Chocolate Bayou, Texas, will not be assumed by the Company, but will be retained
exclusively by DuPont. Each party has also agreed to assume and be responsible
for certain liabilities associated with activities and operations of the other
party and its subsidiaries to the extent performed for or on behalf of its
current or historical business. The parties have also agreed to bear
responsibility in proportion
    
                                       108
<PAGE>   110
 
to the relative amounts of waste deposited by each party on any contaminated
off-site location. The Separation Agreement contains indemnification and
contribution provisions in connection with (i) the assumption or retention of
liabilities by the Company and DuPont, (ii) the conduct of the parties'
respective businesses subsequent to the Separation, (iii) misstatements or
omissions in the Registration Statement of which this Prospectus is a part with
respect to information provided by the other party and (iv) the use of the
other's trademarks, tradenames, logos or other identifiers.
 
   
     The Separation Agreement contains certain provisions regarding corporate
governance of the Company, most of which depend on the level of DuPont's
ownership interest in the Company. The Separation Agreement provides that for so
long as DuPont beneficially owns shares representing at least 30 percent of the
voting power of all of the outstanding shares of capital stock of the Company
entitled to vote generally in the election of directors excluding any class or
series of capital stock entitled to vote only in the event of dividend
arrearages ("Voting Stock"), Conoco will not, without the prior consent of
DuPont, adopt any amendments to its certificate of incorporation or bylaws or
take any action to recommend to its stockholders certain actions which would,
among other things, limit the legal rights of, or deny any benefit to DuPont or
any of its subsidiaries as Conoco stockholders in a manner not applicable to
Conoco stockholders generally. The Separation Agreement provides that, for so
long as DuPont beneficially owns shares representing 50 percent or more of the
voting power of the outstanding Voting Stock, (i) DuPont will have the right to
designate for nomination by the Company's Board of Directors (or any nominating
committee thereof) a majority of the members of the Company's Board of Directors
and (ii) a majority of the members of the Audit and Compliance and Compensation
Committees of the Company's Board of Directors will be required to be directors
designated by DuPont. For so long as DuPont beneficially owns shares
representing less than 50 percent but more than 10 percent of the voting power
of outstanding Voting Stock, DuPont will have the right to designate for
nomination by the Company's Board of Directors (or any nominating committee
thereof) a number of directors proportionate to its voting power of the
outstanding Common Stock of the Company, and, so long as DuPont beneficially
owns greater than 10 percent of the voting power, all Committees of the Board of
Directors will be required to include at least one director designated by
DuPont. For so long as DuPont beneficially owns shares representing 20 percent
or more of the outstanding Voting Stock, the Company will be required to deliver
to DuPont certain financial information of the Company. In addition, as long as
DuPont owns 50 percent or more of the voting power of the outstanding Voting
Stock, the Company will not be permitted to make certain changes in its
accounting principles or practices without the consent of DuPont. The Separation
Agreement also generally provides that, if requested by the Company, DuPont,
under certain limited circumstances, and as long as DuPont determines that it
will not adversely affect DuPont's ability or timing in receiving a favorable
ruling from the Internal Revenue Service ("IRS") with respect to a tax-free
distribution under Section 355 of the Code of Conoco's Class B Common Stock held
by DuPont, will seek such ruling on the basis that it will amend the Certificate
of Incorporation of Conoco to include a provision for the automatic conversion
of all Class B Common Stock into Class A Common Stock under certain
circumstances.
    
 
   
     The Separation Agreement provides that the Company will, subject to certain
exceptions, use the proceeds of the incurrence of any indebtedness or of the
issuance of any equity securities by the Company and any of its subsidiaries,
including the proceeds of the Offerings, to repay debt owed to DuPont, including
the $7.5 billion Note described below under the caption "-- Intercompany Notes."
Generally, all one-time costs, including fees and taxes, directly relating to
the Offerings or the Separation and incurred and paid between May 11, 1998 and
24 months following the date on which DuPont's voting power falls below 50
percent of the voting power of all of the outstanding Voting Stock, are to be
paid or reimbursed by DuPont under the terms of the Separation Agreement.
    
 
   
     The Separation Agreement contemplates that all cash generated by Conoco and
its subsidiaries prior to the closing of the Offerings will be for the account
of DuPont, except that DuPont has agreed that following the application of the
net proceeds of the Offerings and the utilization by Conoco of a portion of its
cash and cash equivalents in connection with the matters discussed below under
the caption "-- Intercompany Notes," Conoco and its subsidiaries will have an
aggregate of $225 million of cash and cash equivalents on hand and $70 million
of additional monetary assets held by the Company's captive insurance company
and its
    
 
                                       109
<PAGE>   111
 
   
subsidiaries. The Separation Agreement requires that the Company use its best
efforts to terminate, or have the Company or a subsidiary of the Company
substituted for DuPont, under all existing guarantees by DuPont of obligations
relating to the business of the Company, including financial, performance and
other guarantee obligations, and under letters of credit for the account of
DuPont issued on behalf of the Company's business. Commencing on the earlier of
(i) two years following closing of the Offerings or (ii) the date that DuPont
holds less than 50 percent of the voting power of the outstanding Common Stock
of the Company, the Company will pay DuPont a fee of .20 percent per annum on
the total amount of any outstanding guarantees and letters of credit. As of the
Effective Date, the amount of such guarantees is agreed to be $1,785 million.
The amount of guarantees for purposes of the fee calculation may be increased or
decreased in good faith judgment of the chief financial officer or treasurer of
DuPont to reflect changes in the financial exposure of DuPont but may only be
adjusted at such time as the amount of any such adjustment exceeds $50 million.
    
 
INTERCOMPANY NOTES
 
     On July 20, 1998, a wholly owned subsidiary of the Company issued a
promissory note (the "Note") to DuPont in the aggregate principal amount of $7.5
billion bearing interest at a rate of 6.0125 percent per annum. The Note has a
maturity date of January 2, 2000. The Note may be voluntarily prepaid without
penalty or premium. The Note also provides for mandatory prepayments in the
event cash proceeds are realized by the Company from the incurrence of
indebtedness or the issuance of equity securities by the Company or its
subsidiaries. The Note includes certain covenants and customary events of
default, including failure to pay interest when due, certain events of
bankruptcy of the Company and change of control. The consent of DuPont is also
required prior to the Company entering into certain transactions.
 
   
     The Company will use the net proceeds of the Offerings and possibly a
portion of its cash and cash equivalents to repay a portion of amounts
outstanding under the Note including principal and accrued interest, such that
immediately following the Offerings, the aggregate principal amount owed by the
Company to DuPont pursuant to the Note will be $4,846 million. See "Use of
Proceeds." The Company will also use a portion of its cash and cash equivalents
to repay or purchase, or DuPont will contribute to the Company, all of the
remaining principal balance of the Intercompany Notes described in clauses (ii)
and (iii) of "Use of Proceeds." Pursuant to the Employee Matters Agreement and
the Separation Agreement, the Company will also owe DuPont an additional amount,
estimated at $80 million, which will be evidenced by a promissory note. See
"-- Employee Matters Agreement."
    
 
   
     The Company and DuPont will enter into a Revolving Credit Agreement under
which DuPont will provide the Company with a revolving credit facility in
principal amount of up to $500 million. The term of DuPont's commitment under
this facility will begin upon satisfaction of certain conditions and continue
until the earlier of (i) October 11, 1999 or (ii)(a) the date on which DuPont's
direct or indirect voting power in the Company falls below 50 percent of the
outstanding voting power of the Company or (b) DuPont's election to terminate
its commitment as the result of an unremedied event of default. Loans under the
Revolving Credit Agreement will be subject to mandatory prepayment to the extent
the Company's cash and cash equivalents exceed $325 million or such higher
amount as the Company and DuPont may agree. Loans under this facility will bear
interest at a rate equal to 30-day LIBOR plus 0.20 percent per annum and may be
voluntarily prepaid without penalty or premium.
    
 
TAX SHARING AGREEMENT
 
   
     The Company and certain of its subsidiaries have historically been included
in DuPont's consolidated group (the "Consolidated Group") for U.S. federal
income tax purposes as well as in certain consolidated, combined or unitary
groups which include DuPont and/or certain of its subsidiaries (a "Combined
Group") for state, local and foreign income tax purposes. Prior to the
Offerings, the Company and DuPont will enter into a tax sharing agreement (the
"Tax Sharing Agreement") in connection with the Offerings. Pursuant to the Tax
Sharing Agreement, the Company and DuPont generally will make payments between
them such that, with respect to tax returns for any taxable period in which the
Company or any of its subsidiaries is included in the Consolidated Group or any
Combined Group, the amount of taxes to be paid by the Company
    
 
                                       110
<PAGE>   112
 
will be determined, subject to certain adjustments, as if the Company and each
of its subsidiaries included in the Consolidated Group or Combined Group filed
their own consolidated, combined or unitary tax return. The Company and DuPont
will jointly prepare pro forma tax returns with respect to any tax return filed
with respect to the Consolidated Group or any Combined Group in order to
determine the amount of tax sharing payments under the Tax Sharing Agreement.
The Company will be responsible for any taxes with respect to tax returns that
include only the Company and its subsidiaries.
 
   
     DuPont will be primarily responsible for preparing and filing any tax
return with respect to the Consolidated Group or any Combined Group. Pursuant to
the Tax Sharing Agreement, the Company will be responsible for preparing the
portion of any such tax return that relates exclusively to the Company or any of
its subsidiaries; provided, that the Company will be required to submit any such
portions to DuPont for DuPont's review and approval, which approval may not be
unreasonably withheld. The Company generally will be responsible for preparing
and filing any tax returns that include only the Company and its subsidiaries.
    
 
     DuPont will be primarily responsible for controlling and contesting any
audit or other tax proceeding with respect to the Consolidated Group or any
Combined Group. Pursuant to the Tax Sharing Agreement, the Company will have the
right to control and contest any audit or tax proceeding that relates directly
to any tax item included on the portion of any tax return which the Company is
responsible for preparing; provided, that the entering into by the Company of
any settlement or agreement or any decision in connection with any judicial or
administrative tax proceeding will be subject to the review and approval of
DuPont, which approval may not be unreasonably withheld. Disputes arising
between the parties relating to matters covered by the Tax Sharing Agreement are
subject to resolution through specific dispute resolution provisions.
 
   
     The Company has been included in the Consolidated Group for periods in
which DuPont beneficially owned at least 80 percent of the total voting power
and value of the outstanding stock of the Company. It is not expected that the
Company will be included in the Consolidated Group following the Offerings. Each
member of a consolidated group for U.S. federal income tax purposes is jointly
and severally liable for the federal income tax liability of each other member
of the consolidated group. Accordingly, although the Tax Sharing Agreement
allocates tax liabilities between the Company and DuPont, for any period in
which the Company was included in the Consolidated Group, the Company could be
liable in the event that any federal tax liability was incurred, but not
discharged, by any other member of the Consolidated Group.
    
 
   
     DuPont and the Company have agreed to cooperate, and the Company has agreed
to take any and all actions reasonably requested by DuPont, in connection with
DuPont's obtaining of a ruling ("Ruling") from the Internal Revenue Service
regarding the tax-free nature of a split-off or spin-off of Conoco stock by
DuPont to DuPont stockholders. The Company generally will be responsible for any
corporate taxes resulting from the failure of the split-off or spin-off to
qualify as a tax-free transaction to the extent such taxes are attributable to,
or result from, any action or failure to act by the Company or certain
transactions involving the Company following the split-off or spin-off.
    
 
EMPLOYEE MATTERS AGREEMENT
 
   
     Prior to the Offerings, DuPont and the Company will enter into an agreement
(the "Employee Matters Agreement"), which will set forth the understanding
between the parties with respect to current and former employees of DuPont and
the Company, including without limitation claims arising out of or relating to
any employee benefit or compensation plan, agreement, arrangement or program, as
well as collective bargaining agreements, accrued wages and workers'
compensation, holiday, vacation and disability benefits. Except as described
below, the parties have agreed that, as of the Effective Date (a) DuPont, or an
appropriate DuPont subsidiary, will assume and be solely responsible for all
liabilities and obligations whatsoever with respect to current and former
employees of DuPont other than the Transferred Business Employees (as defined
below) and (b) the Company, or an appropriate Company subsidiary, will assume
and be solely responsible for all liabilities and obligations whatsoever with
respect to Transferred Business Employees. "Transferred Business Employees"
means (a) those persons who are employed as officers or employees of the
business transferred to Conoco pursuant to the Separation Agreement (the
"Transferred Business") immediately prior to or effective as of the Effective
Date and (b) all former officers and employees of the Transferred Business who,
    
 
                                       111
<PAGE>   113
 
   
immediately prior to the termination of their employment, were employed in the
Transferred Business. In the event that on the Effective Date (or if such person
is no longer employed as of the Effective Date, then as of the last date of such
person's employment) any person will be (or was) employed in the Transferred
Business, as well as in the business retained by DuPont pursuant to the
Separation Agreement, such person will be considered a Transferred Employee if,
but only if, on the Effective Date (or if such person is no longer employed as
of the Effective Date, then as of the last date of such person's employment)
such person's primary employment will be (or was) in the Transferred Business.
Notwithstanding the preceding, (a) with respect to any claim of a Transferred
Business Employee relating to a liability or obligation arising under the DuPont
Savings and Investment Plan or any DuPont health benefit plan, which claim arose
while such Transferred Business Employee was a DuPont employee, DuPont (and the
applicable DuPont plan) or the applicable DuPont subsidiary (and the applicable
DuPont subsidiary plan) will retain all such liabilities and obligations of such
Transferred Business Employee and (b) with respect to any claim of a current or
former DuPont employee (other than the Transferred Business Employees) relating
to a liability or obligation arising under the Thrift Plan for Employees of
Conoco Inc. or any Conoco health benefit plan, which claim arose while such
DuPont employee was a Company employee, Conoco (and the applicable Conoco plan)
or the applicable Conoco subsidiary (and the applicable Conoco subsidiary plan)
will assume and be solely responsible for all such liabilities and obligations
of such DuPont employee.
    
 
     Following the Effective Date, the Transferred Business Employees who
participate in the DuPont Pension Plan will continue to participate in the
DuPont Pension Plan. Effective as of the date DuPont ceases to own securities
representing 80 percent or more of the voting power and ceases to own securities
representing 80 percent or more of the economic value of all outstanding shares
of Common Stock (the "Ownership Reduction Date"), the Company will establish its
own retirement plan (the "Company Retirement Plan"). Within six months following
the Ownership Reduction Date, so long as certain conditions are met, the trustee
of the DuPont Pension Plan will transfer (the date of such transfer, the
"Transfer Date") to the trustee of the Company Retirement Plan an amount
approximately equal to 90 percent of $820 million (plus or minus any investment
gains and losses and benefits payments made between the Effective Date and the
Transfer Date); within 90 days of the Transfer Date, the trustee of the DuPont
Pension Plan will transfer the remaining 10 percent, plus interest on such
remainder.
 
     On or prior to January 1, 1999, the Company will establish a benefit
restoration plan relating to the Company Thrift Plan for the benefit of current
or former employees of the Company who participated in the DuPont Salary
Deferral and Savings Restoration Plan and will assume and be solely responsible
for the liabilities and obligations relating to current or former employees of
the Company who participated in the DuPont Salary Deferral and Savings
Restoration Plan.
 
   
     Certain Company employees will have the option, subject to specific country
tax and legal requirements, effective as of the closing of the Offerings, to
participate in the Option Program, which involves the cancellation of all or
part of their DuPont Options or DuPont SARs, whether or not vested or
exercisable, and the issuance by the Company upon such cancellation of Company
Stock Options and Company SARs, as applicable. See "Management -- Treatment of
Outstanding Stock Options and Stock Appreciation Rights." Retired employees of
the Company who hold DuPont Options or DuPont SARs will not participate in the
Option Program. All DuPont Options and DuPont SARs held by retired employees,
together with all such Options and SARs held by employees who do not elect to
participate in the Option Program, will continue to be obligations solely of
DuPont. The Separation Agreement provides that the Company will issue a
promissory note to DuPont, the principal amount of which will include (i) an
assumed level of future appreciation of DuPont Options and DuPont SARs held by
Conoco employees who do not participate in the Option Program and (ii) an amount
calculated to result in an approximately equal sharing between the Company and
DuPont of the after-tax cost that would result from an assumed exercise of all
DuPont Options and DuPont SARs held by Conoco employees outstanding immediately
prior to the Offerings (including those to be cancelled upon issuance of Company
Stock Options and SARs), based on the appreciated value of the options at the
time of the Offerings. The amount to be owed by the Company to DuPont under this
provision is currently expected to be approximately $70 million. See
" -- Intercompany Notes."
    
 
                                       112
<PAGE>   114
 
     With respect to any pension plan maintained or sponsored by DuPont for the
benefit of foreign employees in which only Transferred Business Employees
participate, the Company shall assume or retain such plan, the assets thereof
and the sole liability relating to Transferred Business Employees under such
plan.
 
   
     DuPont employees who transfer to and become employed by the Company, and
Company employees who transfer to and become employed by DuPont, in either case
on the United States payroll, prior to the Ownership Reduction Date shall be
transferred in accordance with the terms of the transfer guidelines in effect
immediately prior to the Effective Date. In consideration of the liabilities
assumed by DuPont under the employee transfer guidelines, the principal amount
of the promissory note referred to in the second preceding paragraph will
include an additional $10.4 million. If a single transfer of 100 or more
employees from DuPont to the Company occurs or if a single transfer of 100 or
more employees from the Company to DuPont occurs, in either case prior to the
Ownership Reduction Date, a supplemental cash payment will be made to DuPont or
the Company as applicable. The amount of the cash payment will be calculated in
accordance with the Employee Matters Agreement.
    
 
   
     Following the Effective Date, the Company Thrift Plan will continue to
include DuPont common stock as an investment option until the Ownership
Reduction Date and then will continue to retain the DuPont common stock fund for
a period of no less than five years. New investments in DuPont common stock may
be discontinued by Conoco after the Ownership Reduction Date.
    
 
TRANSITIONAL SERVICES AGREEMENT
 
     Prior to the Offerings, DuPont and the Company will enter into certain
agreements (the "Transitional Services Agreements") pursuant to which DuPont or
its subsidiaries (other than the Company and its subsidiaries), on the one hand,
and the Company or its subsidiaries, on the other hand, will agree to continue
providing various services to each other, including material procurement,
financial and administrative services, consulting and research services, and
employee benefits administration. Each service provided pursuant to the
Transitional Services Agreements will be provided for a specified time period,
ranging from three to 24 months. However, either party and its subsidiaries may
terminate any or all services that they receive under the Transitional Services
Agreements at any time upon 45 days' prior written notice. During the term of
each such service, the parties and their subsidiaries are obligated to take all
steps necessary to establish the processes and systems to enable them to perform
the relevant services on a stand alone basis. The parties and their subsidiaries
will be obligated to pay fees established in the Transitional Services
Agreements based upon the type and amount of services rendered.
 
INFORMATION SYSTEMS AND TELECOMMUNICATION CARRIER TRANSITIONAL SERVICES
AGREEMENTS AND FACILITIES LEASE AGREEMENTS
 
     DuPont and the Company will enter into a series of United States and
foreign service agreements ("SAs") which will provide for the cross-provision of
information system services and for the provision of telecommunication carrier
services by DuPont to the Company. DuPont and the Company will also enter into a
facilities lease agreement whereby the Company will grant leases to DuPont for
data center and office facilities at the Company's Houston, Texas and Ponca
City, Oklahoma sites. The term of the SAs will be two years for transitional
services. Longer terms, up to nine years, will be provided for telecommunication
services and the facility leases. Under the SAs, DuPont and third party
contractors, such as Computer Sciences Corporation and Andersen Consulting, will
provide services to the Company in accordance with the terms of the SAs, subject
to the terms of the third party agreements. The SAs will provide that services
will be provided at DuPont's cost, or, in the case of third party services, at
the prices and in accordance with the terms and conditions provided for in the
third party agreements, and subject to an administrative fee. The SAs will also
include an obligation for the Company to enter into a long-term services
agreement with Computer Sciences Corporation.
 
NATURAL GAS SUPPLY AGREEMENT
 
     DuPont consumes approximately 350 million cubic feet per day of natural gas
at its various facilities in the United States. The acquisition of this supply
is currently handled by the Company. DuPont receives the
                                       113
<PAGE>   115
 
natural gas at cost plus a nominal management fee. In some limited cases, the
Company's natural gas production equity is used directly in a DuPont facility,
but over 95 percent of this supply has historically been purchased from third
parties. Prior to the Offerings, DuPont and the Company intend to enter into an
agreement to continue this supply management function for a minimum of one year.
The associated management fee will be reflective of market costs for similar
supply services.
 
FEEDSTOCK FOR DUPONT'S SABINE RIVER WORKS PLANT
 
     The Company owns and operates the Mont Belvieu Storage Facility, which is
currently supplying DuPont's Sabine River Works Plant (Ethylene Business Unit)
with its full ethane feedstock requirements, providing storage and throughput
services for both ethane and ethylene and operating DuPont-owned pipelines for
these products. The Company and DuPont have reached agreement for the provision
of ethane and ethylene storage and throughput services for the next 30 years.
Furthermore, under the terms of the agreement, the Company will operate certain
DuPont-owned pipelines for a period of 20 years. The Company will supply DuPont
with its partial requirements of ethane for a minimum of two years.
 
MOTOR CARRIER AGREEMENT
 
   
     Prior to the Offerings, the Company and Sentinel Transportation Company, a
wholly owned subsidiary of DuPont, will enter into a motor carrier agreement
("Motor Carrier Agreement"), for the provision of transportation of commodities
within the United States and Canada. The term of the Motor Carrier Agreement
will be for a one year period. However, either party may terminate such
arrangement at any time upon 90 days' prior written notice.
    
 
REGISTRATION RIGHTS AGREEMENT
 
   
     Prior to the Offerings, DuPont and the Company will enter into an agreement
(the "Registration Rights Agreement"), pursuant to which the Company will agree
to register on a "shelf" registration statement the sale of Common Stock owned
by DuPont. The Company will agree to keep the shelf registration effective for a
period of two years following the date that the shelf registration comes
effective. In addition, the Company will provide DuPont with three demand
registration rights and certain "piggy-back" registration rights, with respect
to securities owned by DuPont. Such sales may be effected pursuant to one or
more underwritten offerings or otherwise. The parties will agree to indemnify
each other and any underwriters on standard terms, including for liability under
federal securities laws.
    
 
                             PRINCIPAL STOCKHOLDER
 
   
     As of the date of this Prospectus, the Company is indirectly wholly owned
by DuPont. After the completion of the Offerings, DuPont will indirectly own 100
percent of the Company's outstanding Class B Common Stock, representing 93.8
percent of the combined voting power of all classes of voting stock of the
Company. Under applicable provisions of the Delaware General Corporation Law and
the Company's Certificate of Incorporation, subject to class voting rights,
prior to the divestiture of its ownership interest in the Company, DuPont will
be able, acting alone, to elect the entire Board of Directors of the Company and
to approve any action requiring stockholder approval. The address of DuPont's
principal executive office is 1007 Market Street, Wilmington, Delaware 19898.
The Company is not aware of any person or group other than DuPont that will
beneficially own more than five percent of the outstanding shares of Common
Stock following the Offerings.
    
 
                                       114
<PAGE>   116
 
                          DESCRIPTION OF CAPITAL STOCK
 
GENERAL
 
   
     The authorized capital stock of the Company will consist of (i) 3.0 billion
shares of Class A Common Stock, par value $.01 per share, and 1.6 billion shares
of Class B Common Stock, par value $.01 per share (the Class A Common Stock and
Class B Common Stock together, the "Common Stock"), and (ii) 250 million shares
of Preferred Stock, par value $.01 per share, none of which is outstanding as of
the date hereof. Of the 3.0 billion shares of Class A Common Stock, 150 million
shares are being offered in the Offerings (or 172.5 million shares if the U.S.
Underwriters exercise their over-allotment option in full). Of the 1.6 billion
shares of Class B Common Stock, 455.5 million shares will be outstanding and
held by DuPont or one or more of its affiliates on the Closing Date. A
description of the material terms and provisions of the Company's Certificate of
Incorporation affecting the relative rights of the Class A Common Stock, the
Class B Common Stock and the Preferred Stock is set forth below. The following
description of the capital stock of the Company is intended as a summary only
and is qualified in its entirety by reference to the forms of the Company's
Certificate of Incorporation and By-laws filed with the Registration Statement
of which this Prospectus forms a part, and to Delaware corporate law.
    
 
COMMON STOCK
 
     Voting Rights
 
     The holders of Class A Common Stock and Class B Common Stock generally have
identical rights, except that holders of Class A Common Stock are entitled to
one vote per share while holders of Class B Common Stock are entitled to five
votes per share on all matters to be voted on by stockholders. Holders of shares
of Class A Common Stock and Class B Common Stock are not entitled to cumulate
their votes in the election of directors. Generally, all matters to be voted on
by stockholders must be approved by a majority of the votes entitled to be cast
by the holders of Class A Common Stock and Class B Common Stock present in
person or represented by proxy, voting together as a single class, subject to
any voting rights granted to holders of any Preferred Stock. Except as otherwise
provided by law or in the Certificate of Incorporation, and subject to any
voting rights granted to holders of any outstanding Preferred Stock, amendments
to the Certificate of Incorporation must be approved by a majority of the votes
entitled to be cast by the holders of Class A Common Stock and Class B Common
Stock, voting together as a single class. However, amendments of the Certificate
of Incorporation that would alter or change the powers, preferences or special
rights of the Class A Common Stock or the Class B Common Stock so as to affect
them adversely also must be approved by a majority of the votes entitled to be
cast by the holders of the shares affected by the amendment, voting as a
separate class, and holders of Class A Common Stock are not entitled to vote on
any alteration or change in the powers, preferences or special rights of the
Class B Common Stock that would not adversely affect the rights of holders of
Class A Common Stock. For purposes of the foregoing provisions, any provision
for the voluntary, mandatory and other conversion or exchange of the Class B
Common Stock into or for Class A Common Stock on a one-for-one basis shall be
deemed not to adversely affect the rights of the Class A Common Stock.
Notwithstanding the foregoing, any amendment to the Certificate of Incorporation
to increase the authorized shares of any class of capital stock of the Company
requires the approval only of a majority of the votes entitled to be cast by the
holders of Class A Common Stock and Class B Common Stock, voting together as a
single class.
 
     Dividends
 
     Holders of Class A Common Stock and Class B Common Stock will share equally
on a per share basis in any dividend declared by the Board of Directors, subject
to any preferential rights of any outstanding Preferred Stock. Dividends payable
in shares of Common Stock may be paid only as follows: (i) shares of Class A
Common Stock may be paid only to holders of Class A Common Stock, and shares of
Class B Common Stock may be paid only to holders of Class B Common Stock; and
(ii) the number of shares so paid will be equal on a per share basis with
respect to each outstanding share of Class A Common Stock and Class B Common
Stock.
 
                                       115
<PAGE>   117
 
     The Company may not reclassify, subdivide or combine shares of either class
of Common Stock without at the same time proportionally reclassifying,
subdividing or combining shares of the other class.
 
     Conversion
 
   
     Each share of Class B Common Stock is convertible while held by DuPont or
any of its subsidiaries (excluding the Company) at the option of the holder
thereof into one share of Class A Common Stock. Following any distribution of
Class B Common Stock to securityholders of DuPont in a transaction (including
any distribution in exchange for DuPont shares or securities) intended to
qualify as a tax-free distribution under Section 355 of the Code, or any
corresponding provision of any successor statute (a "Tax-Free Split-Off"),
shares of Class B Common Stock will no longer be convertible into shares of
Class A Common Stock.
    
 
   
     Prior to a Tax-Free Split-Off, any shares of Class B Common Stock
transferred to a person other than DuPont or any of its affiliates (excluding
the Company) will automatically be converted into shares of Class A Common Stock
upon such transfer. Shares of Class B Common Stock transferred to stockholders
of DuPont in a Tax-Free Split-Off will not be converted into shares of Class A
Common Stock and, following a Tax-Free Split-Off, shares of Class B Common Stock
will be transferable as Class B Common Stock, subject to applicable laws.
    
 
   
     All shares of Class B Common Stock will automatically be converted into
Class A Common Stock if a Tax-Free Split-Off has not occurred and the number of
outstanding shares of Class B Common Stock owned by DuPont (together with its
subsidiaries (excluding the Company)) falls below 50 percent of the aggregate
number of outstanding shares of Common Stock. This automatic conversion of Class
B Common Stock into Class A Common Stock will prevent DuPont from decreasing its
economic interest in the Company to less than 50 percent while still retaining
control of more than 80 percent of the Company's voting power. All conversions
will be effected on a share-for-share basis.
    
 
   
     Other Rights
    
 
     Unless approved by a majority of the votes entitled to be cast by the
holders of each class of Common Stock, voting separately as a class, in the
event of any reorganization or consolidation of the Company with one or more
corporations or a merger of the Company with another corporation in which shares
of Common Stock are converted into or exchangeable for shares of stock, other
securities or property (including cash), all holders of Common Stock, regardless
of class, will be entitled to receive the same kind and amount of shares of
stock and other securities and property (including cash).
 
     On liquidation, dissolution or winding up of the Company, after payment in
full of the amounts required to be paid to holders of Preferred Stock, if any,
all holders of Common Stock, regardless of class, are entitled to receive the
same amount per share with respect to any distribution of assets to holders of
shares of Common Stock.
 
     No shares of either class of Common Stock are subject to redemption or have
preemptive rights to purchase additional shares of Common Stock or other
securities of the Company.
 
     Upon closing of the Offerings, all the outstanding shares of Class A Common
Stock and Class B Common Stock will be validly issued, fully paid and
nonassessable.
 
PREFERRED STOCK
 
     The Preferred Stock is issuable from time to time in one or more series and
with such designations, preferences and other rights for each series as shall be
stated in the resolutions providing for the designation and issue of each such
series adopted by the Board of Directors of the Company. The Board of Directors
is authorized by the Certificate of Incorporation to determine, among other
things, the voting, dividend, redemption, conversion, exchange and liquidation
powers, rights and preferences and the limitations thereon pertaining to such
series. The Board of Directors, without stockholder approval, may issue
Preferred Stock with voting and other rights that could adversely affect the
voting power of the holders of the Common Stock and that could have certain
anti-takeover effects. The Company has no present plans to issue any shares of
                                       116
<PAGE>   118
 
Preferred Stock. The ability of the Board of Directors to issue Preferred Stock
without stockholder approval could have the effect of delaying, deferring or
preventing a change in control of the Company or the removal of existing
management.
 
     For purposes of the Rights Plan described below, the Board of Directors has
designated           shares of Series A Junior Participating Preferred Stock,
par value $.01 per share (the "Junior Preferred Shares"). See "-- Anti-Takeover
Effects of Certain Certificate and By-law Provisions -- Rights Plan."
 
ANTI-TAKEOVER EFFECTS OF CERTAIN CERTIFICATE AND BY-LAW PROVISIONS
 
  General
 
     Certain provisions of the Certificate of Incorporation and By-laws
summarized below may be deemed to have an anti-takeover effect and may delay,
deter, or prevent a tender offer or takeover attempt that a stockholder might
consider to be in its best interest, including offers or attempts that might
result in a premium being paid over the market price for the shares held by
stockholders.
 
  Board of Directors
 
     The Certificate of Incorporation and By-laws provide that the Board of
Directors will be divided into three classes of directors, with the classes to
be nearly equal in number as possible. One class will be originally elected for
a term expiring at the annual meeting of stockholders to be held in 1999,
another will be originally elected for a term expiring at the annual meeting of
stockholders to be held in 2000 and another will be originally elected for a
term expiring at the annual meeting of stockholders to be held in 2001. Each
director is to hold office until his or her successor is duly elected and
qualified. Commencing with the 1999 annual meeting of stockholders, directors
elected to succeed directors whose terms then expire will be elected for a term
of office to expire at the third succeeding annual meeting of stockholders after
their election, with each director to hold office until such person's successor
is duly elected and qualified.
 
     The Certificate of Incorporation and By-laws provide that the Board of
Directors shall initially consist of nine members. The Certificate of
Incorporation and By-laws further provide that the number of directors of the
Company shall be fixed from time to time exclusively by resolution adopted by
the affirmative vote of a majority of the entire Board of Directors, but shall
consist of not more than fifteen nor less than six directors. In addition, the
Certificate of Incorporation provides that any vacancies will be filled by the
affirmative vote of a majority of the remaining directors, even if less than a
quorum, or by a sole remaining director, or by stockholders if such vacancy was
caused by the action of stockholders (in which event such vacancy may not be
filled by the directors or a majority thereof).
 
   
     The Certificate of Incorporation and the By-laws provide that, except as
provided below, directors may be removed, with or without cause, by the
affirmative vote of shares representing a majority of the votes entitled to be
cast by the then outstanding shares of Voting Stock; provided, however, that
during the period (i) beginning on the first date that DuPont (together with its
subsidiaries (excluding the Company)) ceases to beneficially own shares
representing 50 percent or more of the votes entitled to be cast by Voting Stock
(the "First Trigger Date") and (ii) ending on the first date that DuPont
(together with its subsidiaries (excluding the Company)) ceases to beneficially
own shares representing 30 percent or more of the votes entitled to be cast by
Voting Stock (the "Second Trigger Date"), directors may be removed, with or
without cause, only by the affirmative vote of shares representing not less than
66 2/3 percent of the votes entitled to be cast by Voting Stock. Notwithstanding
the foregoing, from and after the Second Trigger Date, directors of the Company
may only be removed for cause, such removal to be by the affirmative vote of
shares representing a majority of the votes entitled to be cast by Voting Stock.
Unless the Board of Directors has made a determination that removal is in the
best interests of the Company (in which case the following definition shall not
apply), "cause" for removal of a director shall be deemed to exist only if (i)
the director whose removal is proposed has been convicted, or when a director is
granted immunity to testify when another has been convicted, of a felony by a
court of competent jurisdiction and such conviction is no longer subject to
direct appeal; (ii) such director has been found by the affirmative vote of a
majority of the directors then in office at any regular or special meeting of
the Board of Directors called for that purpose or by a court of competent
jurisdiction to
    
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<PAGE>   119
 
have been guilty of willful misconduct in the performance of his duties to the
Company in a matter of substantial importance to the Company; or (iii) such
director has been adjudicated by a court of competent jurisdiction to be
mentally incompetent, which mental incompetency directly affects his ability as
a director of the Company. Notwithstanding the foregoing, whenever holders of
outstanding shares of one or more series of Preferred Stock are entitled to
elect directors of the Company pursuant to the provisions applicable in the case
of arrearages in the payment of dividends or other defaults contained in the
resolution or resolutions of the Board of Directors providing for the
establishment of any such series, any such director of the Company so elected
may be removed in accordance with the provision of such resolution or
resolutions.
 
   
     The By-laws provide that (i) prior to the First Trigger Date, a majority of
the directors on the Audit and Compliance Committee and the Compensation
Committee of the Board of Directors shall be directors designated by DuPont and
(ii) on and after the First Trigger Date, but so long as DuPont owns shares
representing 10 percent or more of the votes entitled to be cast by the Voting
Stock, each committee of the Board of Directors shall include at least one
director designated by DuPont.
    
 
  Advance Notice Procedures
 
   
     The By-laws provide for an advance notice procedure for the nomination,
other than by or at the direction of the Board of Directors, of candidates for
election as directors, as well as for other stockholder proposals to be
considered at annual meetings of stockholders. In general, notice of intent to
nominate a director or raise matters at such meetings will have to be received
in writing by the Company not less than 90 nor more than 120 days prior to the
anniversary of the previous year's annual meeting of stockholders, and must
contain certain information concerning the person to be nominated or the matters
to be brought before the meeting and concerning the stockholder submitting the
proposal. The Certificate of Incorporation and the By-laws provide that, so long
as DuPont owns shares representing 10 percent or more of the votes entitled to
be cast by the Voting Stock, DuPont is exempt from the foregoing advance notice
procedures for director nominations and shareholder proposals.
    
 
  Special Meetings
 
     The By-laws provide that, unless otherwise required by the Certificate of
Incorporation, special meetings of stockholders may be called only by certain
specified officers of the Company or by any officer at the request of the Board
of Directors or a committee thereof; special meetings cannot be called by
stockholders. The Certificate of Incorporation and the By-laws expressly deny
stockholders the right to call special meetings after the Second Trigger Date.
In addition, the Certificate of Incorporation and the By-laws provide that,
prior to the Second Trigger Date, any action required or permitted to be taken
by stockholders may be effected by written consent, but that after the Second
Trigger Date, any such action may be effected only at a duly called annual or
special meeting of stockholders and may not be effected by a written consent. No
business other than that stated in the notice of such meeting may be transacted
at any special meeting.
 
  Fair Price Provision
 
   
     The Certificate of Incorporation includes a "fair price" provision (the
"Fair Price Provision") which prohibits certain Business Combinations (as
defined below) with a Related Person (as defined below), unless (a) the holders
of both classes of Common Stock receive in the Business Combination the same
consideration as the other class and either (i) the same consideration in form
and amount per share as the highest consideration paid by the Related Person in
a tender or exchange offer in which the Related Person acquired at least 50
percent of either the outstanding stock of either the Class A Common Stock or
the outstanding Class B Common Stock and which was consummated not more than one
year prior to the Business Combination or the entering into of a definitive
agreement for the Business Combination or (ii) not less in amount (as to cash)
or fair market value (as to non-cash consideration) than the highest price paid
or agreed to be paid by the Related Person for shares of Class A Common Stock,
Class B Common Stock or Voting Stock in any transaction that either resulted in
the Related Person's beneficially owning 15 percent or more of the Class A
Common Stock, Class B Voting Stock or Voting Stock or was effected at a time
when the Related Person beneficially owned 15 percent or more of the Class A
Common Stock, the Class B Common Stock or
    
 
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<PAGE>   120
 
   
Voting Stock, in either case occurring not more than one year prior to the
Business Combination, or (b) the transaction is approved by (i) a majority of
Continuing Directors (as defined below) or (ii) shares representing (x) not less
than 66 2/3 percent of the votes entitled to be cast by the Voting Stock, (y)
not less than 50.01 percent of the votes entitled to be cast by the Voting Stock
not beneficially owned by the Related Person, and (z) from and after the First
Trigger Date, a majority of the votes entitled to be cast by the holders of each
class of Common Stock (excluding all shares beneficially owned by any Related
Person), voting separately as a class; provided that, after the Second Trigger
Date, the required approval percentages in clauses (b)(ii) (x) and (y) increase
to 80 percent and 66 2/3 percent, respectively. Such approvals are also required
to amend the Fair Price Provisions. The Fair Price Provision will not be
applicable at such time as all shares of Class B Common Stock have been
converted into or exchanged for Class A Common Stock.
    
 
   
     Under the Fair Price Provision, a "Related Person" is any person (other
than DuPont and its affiliates and associates) that beneficially owns 15 percent
or more of the Class A Common Stock, Class B Common Stock or the Voting Stock
outstanding or is an affiliate of the Company and at any time within the
preceding two-year period was the beneficial owner of 15 percent or more of the
Class A Common Stock, Class B Common Stock or the Voting Stock outstanding. The
relevant "Business Combinations" involving the Company covered by the Fair Price
Provision are (1) any merger or consolidation of the Company or any subsidiary
of the Company with or into a Related Person or an affiliate of a Related
Person, (2) any sale, lease, exchange, transfer or other disposition of all or
substantially all of the assets of the Company to a Related Person or an
affiliate of a Related Person, (3) certain reclassifications, recapitalizations
and other corporate actions requiring a stockholder vote that have the effect of
increasing by more than one percent the proportionate share of Class A Common
Stock, Class B Common Stock or Voting Stock beneficially owned by the Related
Person or an affiliate of a Related Person and (4) a dissolution of the Company
caused or proposed by a Related Person or an affiliate of a Related Person. A
"Continuing Director" is a director who is unaffiliated with the Related Person
and who was a director before the Related Person became a Related Person, and
any successor of a Continuing Director who is unaffiliated with a Related Person
and is recommended or nominated to succeed a Continuing Director by a majority
of the Continuing Directors.
    
 
  Amendment
 
   
     Amendments of a number of the foregoing provisions, including Certificate
of Incorporation and By-law provisions with respect to stockholder action by
written consent, stockholder right to call special meetings, advance notice
procedures (including DuPont's exemption therefrom), and board classification
and removal provisions, require approval by shares representing not less than
66 2/3 percent of the votes entitled to be cast by the Voting Stock, voting
together as a single class, and, after the Second Trigger Date, 80 percent of
such votes; provided that after the First Trigger Date, if there are any shares
of Class B Common Stock outstanding, approval by a majority of the votes
entitled to be cast by the holders of each class of Common Stock, voting
separately by class, is also required. The By-laws may also be amended by action
of the Board of Directors.
    
 
  Rights Plan
 
     The Board of Directors currently expects to adopt a Share Purchase Rights
Plan (the "Rights Plan") at or prior to the closing of the Offerings. Pursuant
to the Rights Plan, the Board of Directors will cause to be issued one preferred
share purchase right for each outstanding share of Class A Common Stock and
Class B Common Stock (the "Class A Rights" and "Class B Rights," respectively;
together, the "Rights"). Each Class A Right and each Class B Right will entitle
the registered holder thereof to purchase from the Company one one-thousandth of
a share of the Junior Preferred Shares at a price of $          (the "Purchase
Price"), subject to adjustment. The description and terms of the Rights will be
set forth in a rights agreement (the "Rights Agreement") between the Company and
the designated rights agent (the "Rights Agent"). The description set forth
below is intended as a summary only and is qualified in this entirety by
reference to the form of the Rights Agreement, which will be filed as an exhibit
to the Registration Statement of which this Prospectus is a part. See "Available
Information."
 
                                       119
<PAGE>   121
 
     Until the earlier to occur of (i) 10 business days following a public
announcement that a person or group of affiliated or associated persons (an
"Acquiring Person") have acquired beneficial ownership of (A) 15 percent or more
of the outstanding Class A Common Stock, (B) 15 percent or more of the
outstanding Class B Common Stock or (C) any combination of Class A Common Stock
and Class B Common Stock representing 15 percent or more of the votes of all
shares entitled to vote in the election of directors or (ii) 10 business days
(or such later date as may be determined by action of the Board of Directors
prior to such time as any person becomes an Acquiring Person) following the
commencement of, or announcement of an intention to make, a tender offer or
exchange offer the consummation of which would result in beneficial ownership by
a person or group of shares meeting the requirements set forth in (A), (B) or
(C) above (the earlier of such dates being called the "Rights Distribution
Date"), the Rights will be evidenced by the certificates representing the Common
Stock.
 
   
     The Rights Agreement will provide that, until the Rights Distribution Date
(or earlier redemption or expiration of the Rights), the Rights will be
transferred with and only with the respective Class A Common Stock and Class B
Common Stock. Until the Rights Distribution Date (or earlier redemption or
expiration of the Rights), all shares of Common Stock which are issued will have
associated Rights and the Common Stock certificates will contain a notation
incorporating the Rights Agreement by reference. As soon as practicable
following the Rights Distribution Date, separate certificates evidencing the
Class A Rights and Class B Rights (the "Class A Rights Certificates" and "Class
B Rights Certificates," respectively; together, the "Rights Certificates") will
be mailed to holders of record of the Class A Common Stock and the Class B
Common Stock, respectively, as of the close of business on the Rights
Distribution Date and such separate Right Certificates alone will evidence the
Rights.
    
 
     The Rights will not be exercisable until the Rights Distribution Date. The
Rights will expire on August 31, 2008 (the "Final Expiration Date"), unless the
Final Expiration Date is extended or unless the Rights are earlier redeemed by
the Company, in each case, as summarized below.
 
   
     In the event that any person or group of affiliated or associated persons
becomes an Acquiring Person, proper provision shall be made so that each holder
of a Class A Right and Class B Right, other than Rights beneficially owned by
the Acquiring Person (which will thereafter be void), will thereafter have the
right to receive upon exercise that number of shares of Class A Common Stock and
Class B Common Stock, respectively, having a Current Market Price (as defined in
the Rights Agreement) of two times the exercise price of the Class A Right and
Class B Right, respectively. In the event that the Company is acquired in a
merger or other business combination transaction or 50 percent or more of its
consolidated assets or earning power are sold after a person or group of
affiliated or associated persons becomes an Acquiring Person, proper provision
will be made so that each holder of a Right will thereafter have the right to
receive, upon the exercise thereof at the then-current exercise price of the
Right, that number of shares of common stock of the acquiring company which at
the time of such transaction will have a Current Market Price of two times the
exercise price of the Right.
    
 
     At any time until the tenth business day following the public announcement
that a person or group of affiliated or associated persons has become an
Acquiring Person (meeting the requirements (A)-(C) set forth in the second
paragraph of this summary of the Rights Plan), the Board of Directors may redeem
the Rights in whole, but not in part, at a price of $.01 per Right (the
"Redemption Price"). Immediately upon any redemption of the Rights, the right to
exercise the Rights will terminate and the only right of the holders of the
Rights will be to receive the Redemption Price.
 
     The terms of the Rights may be amended by the Board of Directors without
the consent of the holders of the Rights prior to the Distribution Date. After
the Distribution Date, the provisions of the Rights Agreement may be amended by
the Board of Directors in order to cure any ambiguity, to make changes which do
not adversely affect the interests of holders of Rights, or to shorten or
lengthen any time period under the Rights Agreement; provided, however that no
amendment to lengthen a time period relating to when the Rights may be redeemed
may be made at such time as the Rights are not redeemable. In addition, all
amendments require the consent of DuPont, if DuPont holds 30 percent of voting
power of the outstanding shares of Common
 
                                       120
<PAGE>   122
 
Stock. In addition, no amendments to the definition of "Acquiring Person" can be
made at any time without DuPont's consent, if DuPont holds 10 percent of voting
power of the outstanding shares of Common Stock.
 
     Until a Right is exercised, the holder thereof, as such, will have no
rights as a stockholder of the Company, including, without limitation, the right
to vote or to receive dividends.
 
     The number of outstanding Rights and the number of one-thousandths of a
Junior Preferred Share issuable upon exercise of each Right will be subject to
adjustment in the event of a stock split of the Class A Common Stock and Class B
Common Stock or a stock dividend on the Class A Common Stock and Class B Common
Stock payable in Class A Common Stock and Class B Common Stock, respectively, or
subdivisions, consolidations or combinations of the Class A Common Stock and
Class B Common Stock occurring, in any such case, prior to the Rights
Distribution Date.
 
     The Purchase Price payable, and the number of Junior Preferred Shares or
other securities or property issuable, upon exercise of the Rights will also be
subject to adjustment from time to time to prevent dilution (i) in the event of
a stock dividend on, or a subdivision, combination or reclassification of, the
Junior Preferred Shares, (ii) upon the grant to holders of the Junior Preferred
Shares of certain rights or warrants to subscribe for or purchase Junior
Preferred Shares at a price, or securities convertible into Junior Preferred
Shares with a conversion price, less than the then-current market price of the
Junior Preferred Shares or (iii) upon the distribution to holders of the Junior
Preferred Shares of evidences of indebtedness or assets (excluding regular
periodic cash dividends paid out of earnings or retained earnings or dividends
payable in Junior Preferred Shares) or of subscription rights or warrants (other
than those referred to above).
 
     With certain exceptions, no adjustment in the Purchase Price will be
required until cumulative adjustments require an adjustment of at least one
percent in such Purchase Price. No fractional Junior Preferred Shares will be
issued (other than fractions which are integral multiples of one one-thousandth
of a Junior Preferred Share, which may, at the election of the Company, be
evidenced by depositary receipts) and in lieu thereof, an adjustment in cash
will be made based on the market price of the Junior Preferred Shares on the
last trading day prior to the date of exercise.
 
     Junior Preferred Shares purchasable upon exercise of the Rights will not be
redeemable. Each Junior Preferred Share will be entitled to a minimum
preferential quarterly dividend payment of $.01 per share but will be entitled
to an aggregate dividend of 1,000 times the dividend declared per share of
Common Stock. In the event of liquidation, the holders of the Junior Preferred
Shares will be entitled to a minimum preferential liquidation payment of $1,000
per share but will be entitled to an aggregate payment of 1,000 times the
payment made per share of Class A Common Stock and Class B Common Stock. Each
Junior Preferred Share will have 1,000 votes voting together with the Class A
Common Stock and Class B Common Stock. Finally, in the event of any merger,
consolidation or other transaction in which shares of Class A Common Stock and
Class B Common Stock are exchanged, each Junior Preferred Share will be entitled
to receive 1,000 times the amount received per share of the Class A Common Stock
and the Class B Common Stock. These rights are protected by customary
anti-dilution provisions.
 
     Due to the nature of the Junior Preferred Shares' dividend, liquidation and
voting rights, the value of the one one-thousandth interest in a Junior
Preferred Share purchasable upon exercise of each Right should approximate the
value of one share of Class A Common Stock and Class B Common Stock.
 
     The Rights have certain anti-takeover effects. The Rights will cause
substantial dilution to a person or group of persons that attempts to acquire
the Company on terms not approved by the Board of Directors. The Rights should
not interfere with any merger or other business combination approved by the
Board of Directors prior to the time that a person or group has acquired
beneficial ownership of 15 percent or more of the Class A Common Stock, Class B
Common Stock or voting power of the outstanding shares of Common Stock since the
Rights may be redeemed by the Company at the Redemption Price until such time.
 
     DuPont is excluded from the definition of "Acquiring Person" and therefore
its ownership cannot trigger the distribution of rights under the Rights Plan.
 
                                       121
<PAGE>   123
 
CONTRACTUAL RELATIONS AMONG THE COMPANY, DUPONT AND CERTAIN RELATED ENTITIES
 
   
     The Certificate of Incorporation provides that, if certain disclosure
conditions are satisfied and if fair as to the Company as of the time it is
authorized, approved or ratified by the Board of Directors, by a committee
thereof or by the stockholders, no contract, agreement, arrangement or
transaction between (a) the Company and DuPont, (b) the Company and one or more
of the directors or officers of the Company, DuPont or a Related Entity (as
defined below) or (c) the Company and any Related Entity will be void or
voidable solely because DuPont, any Related Entity or any one or more of the
officers or directors of the Company, DuPont or any Related Entity are parties
thereto (or solely because any such directors or officers are present at or
participate in the meeting of the Board of Directors or committee thereof that
authorizes the contract, agreement, arrangement or transaction or solely because
his or their votes are counted for such purpose), and DuPont, any Related Entity
and such directors and officers (a) will have fully satisfied and fulfilled
their fiduciary duties to the Company and its stockholders with respect thereto,
(b) will not be liable to the Company or its stockholders for any breach of
fiduciary duty by reason of the entering into, performance or consummation of
any such contract, agreement, arrangement or transaction, (c) will be deemed to
have acted in good faith and in a manner such persons reasonably believe to be
in and not opposed to the best interests of the Company and (d) will be deemed
not to have breached their duties of loyalty to the Company and its stockholders
and not to have derived an improper personal benefit therefrom. A "Related
Entity" is a corporation, partnership, association or other organization in
which one or more of the Company's directors have a financial interest.
    
 
DELAWARE BUSINESS COMBINATION STATUTE
 
     Section 203 of the DGCL provides that, subject to certain exceptions
specified therein, an "interested stockholder" of a Delaware corporation shall
not engage in any "business combination," including in general mergers or
consolidations or acquisitions of additional shares of the corporation, with the
corporation for a three-year period following the time that such stockholder
becomes an interested stockholder unless (i) prior to such time, the board of
directors of the corporation approved either the business combination or the
transaction which resulted in the stockholder becoming an interested
stockholder, (ii) upon consummation of the transaction which resulted in the
stockholder becoming an "interested stockholder," the interested stockholder
owned at least 85 percent of the voting stock of the corporation outstanding at
the time the transaction commenced (excluding certain shares), or (iii) on or
subsequent to such time, the business combination is approved by the board of
directors of the corporation and authorized at an annual or special meeting of
stockholders, and not by written consent, by the affirmative vote of at least
66 2/3 percent of the outstanding voting stock not owned by the interested
stockholder. Under Section 203, the restrictions described above also do not
apply to certain business combinations proposed by an interested stockholder
following the announcement or notification of one of certain extraordinary
transactions involving the corporation and a person who had not been an
interested stockholder during the previous three years or who became an
interested stockholder with the approval of a majority of the corporation's
directors, if such extraordinary transaction is approved or not opposed by a
majority of the directors who were directors prior to any person becoming an
interested stockholder during the previous three years or were recommended for
election or elected to succeed such directors by a majority of such directors.
Except as otherwise specified in Section 203, an "interested stockholder" is
defined to include (x) any person that is the owner of 15 percent or more of the
outstanding voting stock of the corporation, or is an affiliate or associate of
the corporation and was the owner of 15 percent or more of the outstanding
voting stock of the corporation at any time within three years immediately prior
to the date of determination and (y) the affiliates and associates of any such
person. DuPont and its affiliates, however, are excluded from the definition of
"interested stockholder" under the terms of Section 203. Under certain
circumstances, Section 203 makes it more difficult for a person who would be an
interested stockholder to effect various business combinations with a
corporation for a three-year period. The Company has not elected to be exempt
from the restrictions imposed under Section 203.
 
                                       122
<PAGE>   124
 
LIMITATIONS ON DIRECTORS' LIABILITY
 
     The Certificate of Incorporation provides that no director of the Company
shall be liable to the Company or its stockholders for monetary damages for
breach of fiduciary duty as a director, except for liability (i) for any breach
of the director's duty of loyalty to the Company or its stockholders, (ii) for
acts or omissions not in good faith or which involve intentional misconduct or a
knowing violation of law, (iii) in respect of certain unlawful dividend payments
or stock redemptions or repurchases as provided in Section 174 of the DGCL or
(iv) for any transaction from which the director derived an improper personal
benefit. The effect of these provisions will be to eliminate the rights of the
Company and its stockholders (through stockholders' derivative suits on behalf
of the Company) to recover monetary damages against a director for breach of
fiduciary duty as a director (including breaches resulting from grossly
negligent behavior), except in the situations described above. The Company's
By-laws provide for indemnification of directors and officers to the maximum
extent permitted by Delaware law.
 
LISTING
 
     The Class A Common Stock has been approved for listing on the New York
Stock Exchange under the symbol "CLL," subject to official notice of issuance.
 
TRANSFER AGENT AND REGISTRAR
 
     The transfer agent and registrar for the Class A Common Stock is First
Chicago Trust Company of New York.
 
                                       123
<PAGE>   125
 
                        SHARES ELIGIBLE FOR FUTURE SALE
 
   
     Upon completion of the Offerings, the Company will have 150 million shares
of Class A Common Stock and 455.5 million shares of Class B Common Stock
outstanding, without taking into account any outstanding options or options
which may be granted following the closing of the Offerings. Of these shares,
the shares sold in the Offerings will be freely tradeable without restriction or
further registration under the Securities Act of 1933 (the "Securities Act"),
unless they are sold by persons deemed to be "affiliates" of the Company or
acting as "underwriters" as those terms are defined in Rule 144 under the
Securities Act. Shares purchased by affiliates of the Company may generally be
sold in compliance with the volume limitation, availability of public
information, manner of sale and notice of sale requirements of Rule 144.
    
 
   
     The 455.5 million shares of Common Stock that will continue to be owned by
DuPont will be "restricted" securities within the meaning of Rule 144 under the
Securities Act and may not be sold in the absence of registration under the
Securities Act or unless an exemption from registration is available, including
the exemptions contained in Rule 144 and Rule 144A under the Securities Act.
    
 
     In general, under Rule 144 as currently in effect, beginning 90 days after
the date of this Prospectus, a person (or persons whose shares are aggregated),
including any person who may be deemed an "affiliate" of the Company, who has
beneficially owned restricted shares for at least one year would be entitled to
sell within any three-month period a number of restricted shares that does not
exceed the greater of one percent of the then outstanding shares of Common Stock
or the average weekly trading volume of the Common Stock on the NYSE during the
four calendar weeks immediately preceding such sale, provided that the seller
files a Form 144 with respect to such sale, and complies with certain
requirements concerning availability of public information and manner of sale.
In addition, under Rule 144(k), a person who is not an affiliate of the Company,
and who has not been an affiliate of the Company at any time during the 90 days
preceding any sale, would be entitled to sell restricted shares without regard
to the limitations described above, provided that the restricted shares have
been beneficially owned for at least two years. In addition, DuPont would be
permitted to sell its existing shares of stock to qualified institutional buyers
pursuant to the provisions of Rule 144A.
 
   
     Each of the Company and DuPont, and certain senior officers of the Company,
has agreed not to sell or otherwise dispose of any shares of the Common Stock
held by them for 180 days after the date of this Prospectus without the prior
written consent of Morgan Stanley & Co. Incorporated, subject to certain
exceptions. See "Underwriters."
    
 
   
     An aggregate of 40 million shares of Class A Common Stock are reserved for
issuance to directors, executives, consultants and employees of the Company
pursuant to the 1998 Stock and Performance Incentive Plan (the "Plan"), the 1998
Key Employee Stock Performance Plan (the "1998 Plan"), the Deferred Compensation
Plan for Non-employee Directors (the "Deferred Compensation Plan") and the
Global Stock Performance Sharing Plan (the "Global Plan"). The Company intends
to file registration statements on Form S-8 covering the issuance of shares of
Class A Common Stock pursuant to the Plan, the 1998 Plan, the Deferred
Compensation Plan and the Global Plan. Accordingly, shares issued pursuant to
the Plan, the 1998 Plan, the Deferred Compensation Plan and the Global Plan will
be freely tradeable, subject to the restrictions on resale on affiliates by Rule
144.
    
 
   
     DuPont has advised the Company that it intends to offer its remaining
Conoco shares in a tax-free split-off expected to be completed within 12 months
of the date hereof. See "Prospectus Summary -- Separation From DuPont." Prior to
the Offerings, there has been no market for the Class A Common Stock, and no
precise predictions can be made of the effect, if any, that market sales of
shares or the availability of shares for sale will have on the market price
prevailing from time to time. Nevertheless, sales of substantial amounts of the
Common Stock in the public market may have an adverse effect on the market price
thereof. See "Risk Factors -- Adverse Effect on Market Price Due to Shares
Eligible for Future Sale."
    
 
                                       124
<PAGE>   126
 
   
               MATERIAL UNITED STATES FEDERAL TAX CONSIDERATIONS
    
                  FOR NON-U.S. HOLDERS OF CLASS A COMMON STOCK
 
   
     The following is a general summary of material United States federal income
and estate tax consequences of the purchase, ownership, and sale or other
taxable disposition of the Class A Common Stock by any person or entity other
than (a) a citizen or resident of the United States, (b) a corporation or other
entity taxable as a corporation created or organized in or under the laws of the
United States or of any political subdivision thereof and (c) a person or entity
otherwise subject to United States federal income taxation on income from
sources outside the United States (a "non-U.S. Holder"). This summary does not
address all tax considerations that may be relevant to non-U.S. Holders in light
of their particular circumstances or to certain non-U.S. Holders that may be
subject to special treatment under United States federal income or estate tax
laws. This summary is based upon the Code, existing, temporary and proposed
regulations promulgated thereunder and administrative and judicial decisions,
all of which are subject to change, possibly with retroactive effect. In
addition, this summary does not address the effect of any state, local or
foreign tax laws. Each prospective purchaser of Class A Common Stock should
consult its tax advisor with respect to the tax consequences of purchasing,
owning and disposing of the Class A Common Stock.
    
 
DIVIDENDS
 
   
     Dividends paid to a non-U.S. Holder of Class A Common Stock generally will
be subject to a withholding of United States federal income tax at a 30 percent
rate (or such lower rate as may be specified by an applicable income tax treaty)
unless (i) the dividend is effectively connected with the conduct of a trade or
business of the non-U.S. Holder within the United States or (ii) if a tax treaty
applies, it is attributable to a United States permanent establishment of the
non-U.S. Holder, in which cases the dividend will be taxed at ordinary federal
income tax rates. If the non-U.S. Holder is a corporation, such effectively
connected income may also be subject to an additional "branch profits tax." A
non-U.S. Holder may be required to satisfy certain certification requirements in
order to claim treaty benefits or otherwise claim a reduction of, or exemption
from, the withholding described above.
    
 
SALE OR OTHER DISPOSITION OF CLASS A COMMON STOCK
 
     A non-U.S. Holder generally will not be subject to United States federal
income tax in respect of any gain recognized on the sale or other taxable
disposition of Class A Common Stock unless (i) the gain is effectively connected
with the conduct of a trade or business of the non-U.S. Holder within the United
States, (ii) in the case of a non-U.S. Holder who is an individual and holds the
Class A Common Stock as a capital asset, the holder is present in the United
States for 183 or more days in the taxable year of the disposition and certain
other tests are met, (iii) the non-U.S. Holder is subject to tax pursuant to the
provisions of United States federal income tax law applicable to certain United
States expatriates or (iv) the Company is or has been during certain periods
preceding the disposition a "United States real property holding corporation"
for United States federal income tax purposes and certain other requirements are
met. The Company may be, or may subsequently become, a United States real
property holding corporation for United States federal income tax purposes
because of its ownership of substantial real property in the United States. If
the Company were to be treated as a United States real property holding
corporation at any time during the five-year period preceding the disposition by
a non-U.S. Holder of Class A Common Stock, then any such non-U.S. Holder who has
held, directly or indirectly, more than five percent of the Class A Common Stock
during such five-year period will be subject to United States federal income
taxation on any gain realized from the disposition of such stock, unless an
exemption is provided under an applicable treaty.
 
ESTATE TAX
 
     Class A Common Stock owned or treated as owned by an individual non-U.S.
Holder at the time of death will be includible in the individual's gross estate
for United States federal estate tax purposes, unless an applicable treaty
provides otherwise, and may be subject to United States federal estate tax.
 
                                       125
<PAGE>   127
 
BACKUP WITHHOLDING AND INFORMATION REPORTING
 
     Dividends. United States backup withholding tax generally will not apply to
dividends paid on the Class A Common Stock that are subject to the 30 percent or
reduced treaty rate of U.S. withholding tax previously discussed. The Company
must report annually to the Internal Revenue Service and to each non-U.S. Holder
the amount of dividends paid to, and the tax withheld with respect to, such
holder, regardless of whether any tax was withheld. This information may also be
made available to the tax authorities in the non-U.S. Holder's country of
residence.
 
     Sale or Other Disposition of Common Stock. Upon the sale or other taxable
disposition of Class A Common Stock by a non-U.S. Holder to or through a U.S.
office of a broker, the broker must backup withhold at a rate of 31 percent and
report the sale to the Internal Revenue Service, unless the holder certifies its
non-U.S. Holder status under penalties of perjury or otherwise establishes an
exemption. Upon the sale or other taxable disposition of Class A Common Stock by
a non-U.S. Holder to or through the foreign office of a United States broker, or
a foreign broker with a certain relationship to the United States, the broker
must report the sale to the Internal Revenue Service (but not backup withhold)
unless the broker has documentary evidence in its files that the seller is a
non-U.S. Holder and/or certain other conditions are met or the holder otherwise
establishes an exemption.
 
     Backup withholding is not an additional tax. Amounts withheld under the
backup withholding rules generally are allowable as a refund or credit against a
non-U.S. Holder's U.S. federal income tax liability, if any, provided that the
required information is furnished to the Internal Revenue Service on a timely
basis.
 
     The U.S. Treasury Department has issued regulations generally effective for
payments made after December 31, 1999 that will affect the procedures to be
followed by a non-U.S. Holder in establishing such holder's status as a non-U.S.
Holder for purposes of the withholding, backup withholding and information
reporting rules described herein. The regulations eliminate the general prior
legal presumption that dividends paid to an address in a foreign country are
paid to a resident of that country. In addition, the regulations impose certain
certification and documentation requirements on non-U.S. Holders claiming the
benefit of a reduced withholding rate with respect to dividends under a tax
treaty or otherwise claiming a reduction of, or exemption from, the withholding
obligation described above. To qualify for exemption from backup withholding and
information reporting under the regulations, a non-U.S. Holder may be required
to furnish a new certification of foreign status. Prospective investors should
consult their tax advisors concerning the effect of such regulations on an
investment in the Class A Common Stock.
 
                                       126
<PAGE>   128
 
                                  UNDERWRITERS
 
     Under the terms and subject to the conditions contained in an Underwriting
Agreement dated the date of this Prospectus (the "Underwriting Agreement"), each
of the U.S. Underwriters named below for whom Morgan Stanley & Co. Incorporated,
Credit Suisse First Boston Corporation, Goldman, Sachs & Co., Merrill Lynch,
Pierce, Fenner & Smith Incorporated, J.P. Morgan Securities Inc., Smith Barney
Inc., BT Alex. Brown Incorporated and Schroder & Co. Inc. are acting as U.S.
Representatives, and the International Underwriters named below for whom Morgan
Stanley & Co. International Limited, Credit Suisse First Boston (Europe)
Limited, Goldman Sachs International, Merrill Lynch International Limited, J.P.
Morgan Securities Ltd., Smith Barney Inc., BT Alex. Brown International and J.
Henry Schroder & Co. Limited are acting as International Representatives, have
severally agreed to purchase, and the Company has agreed to sell to them,
severally, the respective number of shares of Class A Common Stock set forth
opposite their respective names below:
 
   
<TABLE>
<CAPTION>
                                                                NUMBER OF
                            NAME                                 SHARES
                            ----                               -----------
<S>                                                            <C>
U.S. Underwriters:
  Morgan Stanley & Co. Incorporated.........................
  Credit Suisse First Boston Corporation....................
  Goldman, Sachs & Co. .....................................
  Merrill Lynch, Pierce, Fenner & Smith
                Incorporated................................
  J.P. Morgan Securities Inc. ..............................
  Smith Barney Inc. ........................................
  BT Alex. Brown Incorporated...............................
  Schroder & Co. Inc. ......................................
 
       Subtotal.............................................
                                                               -----------
International Underwriters:
  Morgan Stanley & Co. International Limited................
  Credit Suisse First Boston (Europe) Limited...............
  Goldman Sachs International...............................
  Merrill Lynch International Limited.......................
  J.P. Morgan Securities Ltd. ..............................
  Smith Barney Inc. ........................................
  BT Alex. Brown International, a division of Bankers Trust
     International, PLC.....................................
  J. Henry Schroder & Co. Limited...........................
 
       Subtotal.............................................
                                                               -----------
          Total.............................................   150,000,000
                                                               ===========
</TABLE>
    
 
     The U.S. Underwriters and the International Underwriters, and the U.S.
Representatives and the International Representatives, are collectively referred
to as the "Underwriters" and the "Representatives," respectively. The
Underwriting Agreement provides that the obligations of the several Underwriters
to pay for and accept delivery of the shares of Class A Common Stock offered
hereby are subject to the approval of
 
                                       127
<PAGE>   129
 
certain legal matters by their counsel and to certain other conditions. The
Underwriters are obligated to take and pay for all of the shares of Class A
Common Stock offered hereby (other than those covered by the U.S. Underwriters'
over-allotment option described below) if any such shares are taken.
 
     Pursuant to the Agreement between U.S. and International Underwriters, each
U.S. Underwriter has represented and agreed that, with certain exceptions: (i)
it is not purchasing any Shares (as defined below) for the account of anyone
other than a United States or Canadian Person (as defined below) and (ii) it has
not offered or sold, and will not offer or sell, directly or indirectly, any
Shares or distribute any prospectus relating to Shares outside the United States
or Canada or to anyone other than a United States or Canadian Person. Pursuant
to the Agreement between U.S. and International Underwriters, each International
Underwriter has represented and agreed that, with certain exceptions: (i) it is
not purchasing any Shares for the account of any United States or Canadian
Person, and (ii) it has not offered or sold, and will not offer or sell,
directly or indirectly, any Shares or distribute any prospectus relating to the
Shares in the United States or Canada or to any United States or Canadian
Person. With respect to any Underwriter that is a U.S. Underwriter and an
International Underwriter, the foregoing representation and agreements (i) made
by it in its capacity as a U.S. Underwriter apply only to it in its capacity as
a U.S. Underwriter and (ii) made by it in its capacity as an International
Underwriter apply only to it in its capacity as an International Underwriter.
The foregoing limitations do not apply to stabilization transactions or to
certain other transactions specified in the Agreement between the U.S. and
International Underwriters. As used herein, "United States or Canadian Person"
means any national or resident of the United States or Canada, or any
corporation, pension, profit-sharing, or other trust or other entity organized
under the laws of the United States or Canada or of any political subdivision
thereof (other than a branch located outside the United States and Canada of any
United States or Canadian Person) and includes any United States or Canadian
branch of a person who is otherwise not a United States or Canadian person. All
shares of Class A Common Stock to be purchased by the Underwriters are referred
to herein as the "Shares."
 
     Pursuant to the Agreement between U.S. and International Underwriters,
sales may be made between the U.S. Underwriters and International Underwriters
of any number of Shares as may be mutually agreed. The per share price of any
Shares so sold will be the public offering price set forth on the cover page
hereof, in United States dollars, less an amount not greater than the per share
amount of the concession to dealers set forth below.
 
     Pursuant to the Agreement between U.S. and International Underwriters, each
U.S. Underwriter has represented that it has not offered or sold, and has agreed
not to offer or sell, any Shares, directly or indirectly, in any province or
territory of Canada or to, or for the benefit of, any resident of any province
or territory of Canada in contravention of the securities laws thereof and has
represented that any offer or sale of Shares in Canada will be made only
pursuant to an exemption from the requirement to file a prospectus in the
province or territory of Canada in which such offer or sale is made. Each U.S.
Underwriter has further agreed to send to any dealer who purchases from it any
of the Shares a notice stating in substance that, by purchasing such Shares,
such dealer represents and agrees that it has not offered or sold, and will not
offer or sell, directly or indirectly, any of such Shares in any province or
territory of Canada or to, or for the benefit of, any resident of any province
or territory of Canada in contravention of the securities laws thereof and that
any offer or sale of Shares in Canada will be made only pursuant to an exemption
from the requirement to file a prospectus in the province or territory of Canada
in which such offer or sale is made, and that such dealer will deliver to any
other dealer to whom it sells any of such Shares a notice containing
substantially the same statement as is contained in this sentence.
 
     Pursuant to the Agreement between U.S. and International Underwriters, each
International Underwriter has represented and agreed that (i) it has not offered
or sold and, prior to the date six months after the Closing Date for the sale of
the Shares to the International Underwriters, will not offer or sell, any Shares
to persons in the United Kingdom except to persons whose ordinary activities
involve them in acquiring, holding, managing, or disposing of investments (as
principal or agent) for the purposes of their businesses or otherwise in
circumstances that have not resulted and will not result in an offer to the
public in the United Kingdom within the meaning of the Public Offers of
Securities Regulations 1995; (ii) it has complied and will comply with all
applicable provisions of the Financial Services Act 1986 with respect to
anything done by it in relation to the
                                       128
<PAGE>   130
 
Shares in, from or otherwise involving the United Kingdom; and (iii) it has only
issued or passed on and will \only issue or pass on in the United Kingdom any
document received by it in connection with the offering of the Shares to a
person who is of a kind described in Article 11(3) of the Financial Services Act
1986 (Investment Advertisements) (Exemptions) Order 1996 or is a person to whom
such document may otherwise be lawfully issued or passed on.
 
     Pursuant to the Agreement between U.S. and International Underwriters, each
International Underwriter has further represented that it has not offered or
sold, and has agreed not to offer or sell, directly or indirectly, in Japan or
to or for the account of any resident thereof, any of the Shares acquired in
connection with the distribution contemplated hereby, except for offers or sales
to Japanese International Underwriters or dealers and except pursuant to any
exemption from the registration requirements of the Securities and Exchange Law
and otherwise in compliance with applicable provisions of Japanese law. Each
International Underwriter has further agreed to send to any dealer who purchases
from it any of the Shares a notice stating in substance that, by purchasing such
Shares, such dealer represents and agrees that it has not offered or sold, and
will not offer or sell, any of such Shares, directly or indirectly, in Japan or
to or for the account of any resident thereof except for offers or sales to
Japanese International Underwriters or dealers and except pursuant to any
exemption from the registration requirements of the Securities and Exchange Law
and otherwise in compliance with applicable provisions of Japanese law, and that
such dealer will send to any other dealer to whom it sells any of such Shares a
notice containing substantially the same statement as is contained in this
sentence.
 
     The Underwriters initially propose to offer part of the Shares directly to
the public at the public offering price set forth on the cover page hereof and
part to certain dealers at a price that represents a concession not in excess of
$     per share under the public offering price. Any Underwriter may allow, and
such dealers may reallow, a concession not in excess of $     per share to other
Underwriters or to certain dealers. After the initial offering of the Shares,
the offering price and other selling terms may from time to time be varied by
the Representatives.
 
   
     The U.S. Underwriters have been granted an option, exercisable for 30 days
from the date of this Prospectus, to purchase up to an aggregate of 22,500,000
additional Shares at the price to public set forth on the cover page hereof,
less underwriting discounts and commissions. The additional shares to be
provided under this option may be provided by the Company, DuPont or a
combination of the two. The actual option granted by the Company and/or DuPont
will be described in the final prospectus. The U.S. Underwriters may exercise
such option solely for the purpose of covering over-allotments, if any, made in
connection with the offering of the shares of Class A Common Stock offered
hereby. To the extent such option is exercised, each U.S. Underwriter will
become obligated, subject to certain conditions, to purchase approximately the
same percentage of such additional shares of Class A Common Stock as the number
set forth next to such U.S. Underwriter's name in the preceding table bears to
the total number of shares of Class A Common Stock set forth next to the names
of all U.S. Underwriters in the preceding table.
    
 
     The Underwriters have informed the Company that they do not intend for
sales to discretionary accounts to exceed five percent of the aggregate number
of shares of Class A Common Stock offered by them.
 
     The Class A Common Stock has been approved for listing on the NYSE under
the trading symbol "CLL," subject to official notice of issuance. In order to
meet the requirements for listing the Class A Common Stock on the New York Stock
Exchange, the Underwriters have undertaken to meet the New York Stock Exchange's
minimum distribution, issuance and aggregate market value requirements.
 
   
     At the request of the Company, the Underwriters have reserved for sale, at
the initial offering price, up to approximately 3.64 million shares offered
hereby for directors, officers and employees of the Company and certain other
persons designated by the Board of Directors, including 364,000 shares for sale
to officers and other employees of the Company in the United Kingdom. The number
of shares of Class A Common Stock available for sale to the general public will
be reduced to the extent such persons purchase such reserved shares. Any
reserved shares which are not so purchased will be offered by the Underwriters
to the general public on the same basis as the other shares offered hereby,
provided that any shares reserved for sale to persons in the United Kingdom
which are not so purchased will not be offered or sold by the Underwriters to
    
                                       129
<PAGE>   131
 
   
persons in the United Kingdom. Any officer or other employee of the Company in
the United Kingdom purchasing reserved shares will be required to agree not to
sell, assign, pledge or otherwise transfer such shares during the period ending
90 days after the date of this Prospectus.
    
 
   
     The Company and DuPont have agreed that, without the prior written consent
of Morgan Stanley & Co. Incorporated on behalf of the Underwriters, they will
not, during the period ending 180 days after the date of this Prospectus (the
"Lock-up Period"), (i) offer, pledge, sell, contract to sell, sell any option or
contract to purchase, purchase any option or contract to sell, grant any option,
right or warrant to purchase or otherwise transfer, lend or dispose of, directly
or indirectly, any shares of Common Stock or any securities convertible into or
exercisable or exchangeable for Common Stock or (ii) enter into any swap or
other arrangement that transfers to another, in whole or in part, any of the
economic consequences of ownership of the Common Stock whether any such
transaction described in clause (i) or (ii) above is settled by delivery of
Common Stock, or such other securities, in cash or otherwise. Certain senior
officers of the Company have agreed that, without the prior written consent of
Morgan Stanley & Co. Incorporated on behalf of the Underwriters, they will not,
during the period ending 180 days after the date of this Prospectus and subject
to certain exceptions, engage in a transaction described in clause (i) or (ii)
above. The restrictions described in this paragraph do not apply to (x) the sale
of Common Stock to the Underwriters, (y) the issuance by the Company of shares
of Common Stock upon the exercise of an option or warrant or the conversion or
issuance upon cancellation of a security outstanding on the date of this
Prospectus of which the Underwriters have been advised in writing, or (z)
transactions by any person other than the Company relating to shares of Common
Stock or other securities acquired in open market transactions after the
completion of the Offerings. The restrictions on the Company are subject to
exceptions for the issuance of Company Stock Options and Common Stock pursuant
to existing employee benefit plans.
    
 
     In order to facilitate the Offerings, the Underwriters may engage in
transactions that stabilize, maintain, or otherwise affect the price of the
Class A Common Stock. Specifically, the Underwriters may over-allot in
connection with the Offerings, creating a short position in the Class A Common
Stock for their own account. In addition, to cover over-allotments or to
stabilize the price of the Class A Common Stock, the Underwriters may bid for,
and purchase, shares of Class A Common Stock in the open market. Finally, the
underwriting syndicate may reclaim selling concessions allowed to an Underwriter
or a dealer for distributing the Class A Common Stock in the Offerings, if the
syndicate repurchases previously distributed Class A Common Stock in
transactions to cover syndicate short positions, in stabilization transactions,
or otherwise. Any of these activities may stabilize or maintain the market price
of the Common Stock above independent market levels. The Underwriters are not
required to engage in these activities, and may end any of these activities at
any time.
 
     From time to time, the Underwriters and certain of their affiliates have
provided, and continue to provide, investment banking services and trading
services to DuPont and the Company, for which they receive customary fees.
 
     The Company and the Underwriters have agreed to indemnify each other
against certain liabilities, including liabilities under the Securities Act.
 
PRICING OF THE OFFERINGS
 
     Prior to the Offerings, there has been no public market for the Common
Stock. The initial public offering price will be determined by negotiations
between DuPont and the Company on the one hand and the U.S. Representatives on
the other hand. Among the factors to be considered in determining the initial
public offering price will be the future prospects of the Company and its
industry in general, sales, earnings, and certain other financial operating
information of the Company in recent periods, and the price-earnings ratios,
price-sales ratios, market prices of securities and certain financial and
operating information of companies engaged in activities similar to those of the
Company. The estimated initial public offering price range set forth on the
cover page of this Prospectus is subject to change as a result of market
conditions and other factors.
 
                                       130
<PAGE>   132
 
                                 LEGAL MATTERS
 
     The validity of the Class A Common Stock being offered hereby will be
passed upon for the Company by R.A. Harrington, Senior Vice President, Legal,
and General Counsel, and for the Company and DuPont by Skadden, Arps, Slate,
Meagher & Flom LLP, New York, New York. Certain legal matters will be passed on
for the Underwriters by Cravath, Swaine & Moore, New York, New York. Skadden,
Arps, Slate, Meagher & Flom LLP has in the past and continues to represent
DuPont in connection with various matters, including the Separation. Cravath,
Swaine & Moore has in the past and continues to represent DuPont in connection
with various matters not related to the Separation or the Offerings. Baker &
Botts, L.L.P., Houston, Texas, is representing the Company in connection with
certain aspects of the Separation.
 
                                    EXPERTS
 
     The combined financial statements as of December 31, 1996 and 1997, and for
each of the three years in the period ended December 31, 1997 included in this
Prospectus have been so included in reliance on the report of
PricewaterhouseCoopers LLP, independent accountants, given on the authority of
said firm as experts in auditing and accounting.
 
   
     The pro forma combined statement of income for the year ended December 31,
1997 included in this Prospectus has been so included in reliance on the report
of PricewaterhouseCoopers LLP, independent accountants, given on the authority
of said firm as experts in performing examinations of pro forma financial
information in accordance with standards established by the American Institute
of Certified Public Accountants.
    
 
   
     With respect to the unaudited historical combined financial information of
Conoco as of June 30, 1998 and for the six-month periods ended June 30, 1997 and
1998, the unaudited pro forma combined balance sheet as of June 30, 1998 and the
related unaudited pro forma combined statements of income for the six-month
periods ended June 30, 1997 and 1998, included in this Prospectus,
PricewaterhouseCoopers LLP reported that they have applied limited procedures in
accordance with professional standards for a review of such information.
However, their separate reports dated September 28, 1998 and September 28, 1998
appearing herein state that they did not audit and they do not express an
opinion on the unaudited historical interim combined financial information or
the unaudited pro forma combined financial information as of June 30, 1998 and
for the six-month periods ended June 30, 1997 and 1998. PricewaterhouseCoopers
LLP has not carried out any significant or additional audit tests beyond those
which would have been necessary if their reports had not been included.
Accordingly, the degree of reliance on their reports on such information should
be restricted in light of the limited nature of the review procedures applied.
PricewaterhouseCoopers LLP is not subject to the liability provisions of section
11 of the Securities Act for their reports on the unaudited historical interim
combined financial information and on the unaudited pro forma combined financial
information because those reports are not a "report" or a "part" of the
registration statement prepared or certified by PricewaterhouseCoopers LLP
within the meaning of sections 7 and 11 of the Securities Act.
    
 
     The summary letter report of DeGolyer and MacNaughton, independent
petroleum engineering consultants, a copy of which appears as Annex A hereto,
has been included herein in reliance upon the authority of that firm as experts
in estimating proved oil and gas reserves.
 
                                       131
<PAGE>   133
 
                             AVAILABLE INFORMATION
 
     The Company has filed with the Commission a registration statement on Form
S-1, including all amendments and supplements thereto (the "Registration
Statement"), under the Securities Act of 1933, as amended (the "Securities
Act"), with respect to the securities offered hereby. This Prospectus, which
constitutes a part of the Registration Statement, does not contain all of the
information set forth in the Registration Statement, certain items of which are
contained in schedules and exhibits to the Registration Statement as permitted
by the rules and regulations of the Commission. Statements made in this
Prospectus as to the contents of any contract, agreement or other document
referred to are summaries of material terms of such contract, agreement or other
document and are not necessarily complete. With respect to each such contract,
agreement or other document filed as an exhibit to the Registration Statement,
reference is made to the exhibit for a more complete description of the matter
involved, and each such statement shall be deemed qualified in its entirety by
such reference. Items of information omitted from this Prospectus but contained
in the Registration Statement may be inspected and copied at the public
reference facilities maintained by the Commission at Room 1024, Judiciary Plaza,
450 Fifth Street, N.W., Washington, D.C. 20549, and at the regional offices of
the Commission located at Seven World Trade Center, 13th Floor, New York, New
York 10048 and Citicorp Center, 500 West Madison Street, Suite 1400, Chicago,
Illinois 60661. Copies of all or any portion of such material may also be
obtained from the Public Reference Section of the Commission at Judiciary Plaza,
450 Fifth Street, N.W., Washington, D.C. 20549 at prescribed rates. In addition,
such materials filed electronically by the Company with the Commission are
available at the Commission's World Wide Web site at http://www.sec.gov. The
Company's periodic reports, proxy statements and other information filed by the
Company with the Commission can also be inspected at the offices of The New York
Stock Exchange, Inc., 20 Broad Street, New York, NY 10005.
 
     The Company intends to furnish to its stockholders annual reports
containing audited consolidated financial statements and quarterly reports for
the first three quarters of each fiscal year containing unaudited interim
financial information, in each case prepared in accordance with generally
accepted accounting principles.
 
                                       132
<PAGE>   134
 
                                     CONOCO
 
                     INDEX TO COMBINED FINANCIAL STATEMENTS
 
   
<TABLE>
<CAPTION>
                                                              PAGE
                                                              ----
<S>                                                           <C>
Audited Combined Financial Statements
  Report of Independent Accountants.........................   F-2
  Combined Statement of Income -- Years Ended December 31,
     1995, 1996 and 1997....................................   F-3
  Combined Balance Sheet -- at December 31, 1996 and 1997...   F-4
  Combined Statement of Cash Flows -- Years Ended December
     31, 1995, 1996 and 1997................................   F-5
  Combined Statement of Owner's Net Investment and
     Accumulated Other Comprehensive Loss -- Years Ended
     December 31, 1995, 1996 and 1997.......................   F-6
  Notes to Combined Financial Statements....................   F-7
Unaudited Financial Information
  Supplemental Petroleum Data...............................  F-31
  Combined Quarterly Financial Data -- 1996 and 1997........  F-37
Unaudited Interim Combined Financial Statements
  Report of Independent Accountants.........................  F-38
  Interim Combined Statement of Income -- Six Months Ended
     June 30, 1997 and 1998.................................  F-39
  Interim Combined Balance Sheet -- at December 31, 1997 and
     June 30, 1998..........................................  F-40
  Interim Combined Statement of Cash Flows -- Six Months
     Ended June 30, 1997 and 1998...........................  F-41
  Notes to Interim Combined Financial Statements............  F-42
</TABLE>
    
 
     Certain supplementary financial statement schedules have been omitted
because the information required to be set forth therein is either not
applicable or is shown in the financial statements or notes thereto.
 
                                       F-1
<PAGE>   135
 
                       REPORT OF INDEPENDENT ACCOUNTANTS
 
To the Board of Directors and Shareholders
   
of E. I. du Pont de Nemours and Company
    
 
   
     In our opinion, the accompanying combined balance sheets and the related
combined statements of income, of cash flows and of owner's net investment and
accumulated other comprehensive loss appearing on pages F-3 through F-30 of this
Registration Statement on Form S-1 present fairly, in all material respects, the
financial position of Conoco, the petroleum business of E. I. du Pont de Nemours
and Company, at December 31, 1996 and 1997, and the results of its operations
and its cash flows for each of the three years in the period ended December 31,
1997, in conformity with generally accepted accounting principles. These
financial statements are the responsibility of the Company's management; our
responsibility is to express an opinion on these financial statements based on
our audits. We conducted our audits of these statements in accordance with
generally accepted auditing standards, which require that we plan and perform
the audit to obtain reasonable assurance about whether the financial statements
are free of material misstatement. An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the financial statements,
assessing the accounting principles used and significant estimates made by
management, and evaluating the overall financial statement presentation. We
believe that our audits provide a reasonable basis for the opinion expressed
above.
    
 
   
PRICEWATERHOUSECOOPERS LLP
    
 
Houston, Texas
July 24, 1998
 
                                       F-2
<PAGE>   136
 
                              FINANCIAL STATEMENTS
 
                                     CONOCO
 
                     COMBINED STATEMENT OF INCOME (NOTE 1)
 
   
<TABLE>
<CAPTION>
                                                                   YEAR ENDED DECEMBER 31
                                                              --------------------------------
                                                                1995        1996        1997
                                                              --------    --------    --------
                                                              (IN MILLIONS, EXCEPT PER SHARE)
<S>                                                           <C>         <C>         <C>
Revenues
  Sales and Other Operating Revenues*.......................  $20,328     $24,230     $25,796
  Other Income (Note 4).....................................      190         186         467
                                                              -------     -------     -------
          Total Revenues....................................   20,518      24,416      26,263
                                                              -------     -------     -------
Costs and Expenses
  Cost of Goods Sold and Other Operating Expenses...........   11,146      14,560      16,226
  Selling, General and Administrative Expenses..............      728         755         726
  Exploration Expenses......................................      331         404         457
  Depreciation, Depletion and Amortization..................    1,067       1,085       1,179
  Taxes Other Than on Income* (Note 5)......................    5,823       5,637       5,532
  Interest and Debt Expense (Note 6)........................       74          74          36
                                                              -------     -------     -------
          Total Costs and Expenses..........................   19,169      22,515      24,156
                                                              -------     -------     -------
Income Before Income Taxes..................................    1,349       1,901       2,107
Provision for Income Taxes (Note 7).........................      774       1,038       1,010
                                                              -------     -------     -------
Net Income..................................................  $   575     $   863     $ 1,097
                                                              =======     =======     =======
Unaudited Pro Forma Earnings Per Share (Note 2)
  Basic.....................................................                          $  1.81
  Diluted...................................................                          $  1.79
Unaudited Pro Forma Weighted Average Shares Outstanding
  (Note 2)..................................................
  Basic.....................................................                              606
  Diluted...................................................                              611
- ---------------
*Includes petroleum excise taxes............................  $ 5,655     $ 5,461     $ 5,349
</TABLE>
    
 
            See accompanying Notes to Combined Financial Statements
 
                                       F-3
<PAGE>   137
 
                              FINANCIAL STATEMENTS
 
                                     CONOCO
 
                        COMBINED BALANCE SHEET (NOTE 1)
 
                                     ASSETS
 
   
<TABLE>
<CAPTION>
                                                                   DECEMBER 31
                                                              ---------------------
                                                               1996          1997
                                                              -------      --------
                                                                  (IN MILLIONS)
<S>                                                           <C>          <C>
Current Assets
  Cash and Cash Equivalents.................................  $   846      $  1,147
  Marketable Securities.....................................        7             7
  Accounts and Notes Receivable (Note 8)....................    1,494         1,497
  Notes Receivable -- Related Parties (Note 3)..............      322           490
  Inventories (Note 9)......................................      806           830
  Prepaid Expenses..........................................      183           236
                                                              -------      --------
         Total Current Assets...............................    3,658         4,207
Property, Plant and Equipment (Note 10).....................   19,981        21,229
Less: Accumulated Depreciation, Depletion and
  Amortization..............................................   (9,899)      (10,401)
                                                              -------      --------
Net Property, Plant and Equipment...........................   10,082        10,828
                                                              -------      --------
Investment in Affiliates (Note 11)..........................      703         1,085
Long-Term Notes Receivable -- Related Parties (Note 3)......        9           450
Other Assets (Note 12)......................................      774           492
                                                              -------      --------
         Total..............................................  $15,226      $ 17,062
                                                              =======      ========
 
  LIABILITIES AND OWNER'S NET INVESTMENT AND ACCUMULATED OTHER COMPREHENSIVE LOSS
 
Current Liabilities
  Accounts Payable (Note 13)................................  $ 1,025      $  1,090
  Short-Term Borrowings -- Related Parties (Note 3).........      176           644
  Other Short-Term Borrowings and Capital Lease Obligations
    (Note 14)...............................................       32            72
  Income Taxes (Note 7).....................................      453           545
  Other Accrued Liabilities (Note 15).......................    1,110         1,289
                                                              -------      --------
         Total Current Liabilities..........................    2,796         3,640
Long-Term Borrowings -- Related Parties (Note 3)............    2,287         1,450
Other Long-Term Borrowings and Capital Lease Obligations
  (Note 16).................................................      101           106
Deferred Income Taxes (Note 7)..............................    1,767         1,739
Other Liabilities and Deferred Credits (Note 17)............    1,390         1,922
                                                              -------      --------
         Total Liabilities..................................    8,341         8,857
                                                              -------      --------
Commitments and Contingent Liabilities (Note 25)
Minority Interests (Note 18)................................      306           309
Owner's Net Investment......................................    6,636         8,087
Accumulated Other Comprehensive Loss (Note 19)
  Minimum Pension Liability Adjustment......................      (18)          (31)
  Accumulated Foreign Currency Translation Adjustment.......      (39)         (160)
                                                              -------      --------
         Total Accumulated Other Comprehensive Loss.........      (57)         (191)
                                                              -------      --------
         Total Owner's Net Investment and Accumulated Other
          Comprehensive Loss................................    6,579         7,896
                                                              -------      --------
         Total..............................................  $15,226      $ 17,062
                                                              =======      ========
</TABLE>
    
 
            See accompanying Notes to Combined Financial Statements
 
                                       F-4
<PAGE>   138
                              FINANCIAL STATEMENTS
 
                                     CONOCO
 
                   COMBINED STATEMENT OF CASH FLOWS (NOTE 1)
 
   
<TABLE>
<CAPTION>
                                                                YEAR ENDED DECEMBER 31
                                                              ---------------------------
                                                               1995      1996      1997
                                                              -------   -------   -------
                                                                     (IN MILLIONS)
<S>                                                           <C>       <C>       <C>
Cash Provided by Operations
  Net Income................................................  $   575   $   863   $ 1,097
  Adjustments to Reconcile Net Income to Cash Provided by
     Operations:
     Depreciation, Depletion and Amortization...............    1,067     1,085     1,179
     Dry Hole Costs and Impairment of Unproved Properties...      121       137       169
     Deferred Income Taxes (Note 7).........................      133        10        16
     Income Applicable to Minority Interests................        1        19        24
     Other Noncash Charges and Credits -- Net...............       20        66      (271)
     Decrease (Increase) in Operating Assets:
       Accounts and Notes Receivable........................      (39)     (280)      127
       Inventories..........................................       57        22       (79)
       Other Operating Assets...............................       38        10       (96)
     Increase (Decrease) in Operating Liabilities:
       Accounts Payable and Other Operating Liabilities.....       (3)      362       622
       Accrued Interest and Income Taxes (Notes 6 and 7)....      (46)      102        88
                                                              -------   -------   -------
          Cash Provided by Operations.......................    1,924     2,396     2,876
                                                              -------   -------   -------
Investment Activities (Note 21)
  Purchases of Property, Plant and Equipment................   (1,714)   (1,616)   (2,644)
  Investments in Affiliates.................................     (116)     (326)     (339)
  Proceeds from Sales of Assets and Subsidiaries............      244       328       565
  Net Decrease (Increase) in Short-Term Financial
     Instruments............................................      (91)      (33)      381
                                                              -------   -------   -------
          Cash Used for Investment Activities...............   (1,677)   (1,647)   (2,037)
                                                              -------   -------   -------
Financing Activities
  Short-Term Borrowings -- Receipts.........................       63        --        24
                        -- Payments.........................      (70)      (90)       (2)
  Other Long-Term Borrowings -- Receipts....................       25        38        33
                             -- Payments....................     (311)       (1)       (3)
  Transactions with Related Parties:
     Notes Receivable -- Receipts...........................    1,678       402         9
                      -- Payments...........................     (203)       (9)     (617)
     Borrowings -- Receipts.................................      885       706       413
                -- Payments.................................   (1,286)     (520)     (695)
     Net Cash Contribution From (To) Owner..................   (1,094)     (993)      360
  Increase (Decrease) in Minority Interests (Note 18).......       --       280       (21)
                                                              -------   -------   -------
          Cash Used for Financing Activities................     (313)     (187)     (499)
                                                              -------   -------   -------
Effect of Exchange Rate Changes on Cash.....................       33        (2)      (39)
                                                              -------   -------   -------
Increase (Decrease) in Cash and Cash Equivalents............      (33)      560       301
Cash and Cash Equivalents at Beginning of Year..............      319       286       846
                                                              -------   -------   -------
Cash and Cash Equivalents at End of Year....................  $   286   $   846   $ 1,147
                                                              =======   =======   =======
</TABLE>
    
 
            See accompanying Notes to Combined Financial Statements
 
                                       F-5
<PAGE>   139
 
                              FINANCIAL STATEMENTS
 
                                     CONOCO
 
                COMBINED STATEMENT OF OWNER'S NET INVESTMENT AND
             ACCUMULATED OTHER COMPREHENSIVE LOSS (NOTES 1 AND 19)
 
   
<TABLE>
<CAPTION>
                                                                          ACCUMULATED OTHER
                                            OWNER'S NET   COMPREHENSIVE     COMPREHENSIVE
                                            INVESTMENT       INCOME         INCOME (LOSS)      TOTAL
                                            -----------   -------------   -----------------   -------
                                                                  (IN MILLIONS)
<S>                                         <C>           <C>             <C>                 <C>
Years Ended December 31, 1995, 1996 and 1997
Balance January 1, 1995...................    $ 7,281                           $  (6)        $ 7,275
Comprehensive Income
  Net Income..............................        575        $  575                               575
  Other Comprehensive Income (Loss):
     Minimum Pension Liability
       Adjustment.........................                       (2)               (2)             (2)
                                                             ------
          Comprehensive Income............                   $  573
                                                             ======
Net Cash Contribution To Owner............     (1,094)                                         (1,094)
                                              -------                           -----         -------
Balance December 31, 1995.................      6,762                              (8)          6,754
Comprehensive Income
  Net Income..............................        863        $  863                               863
  Other Comprehensive Income (Loss):
     Minimum Pension Liability
       Adjustment.........................                      (10)
     Foreign Currency Translation
       Adjustment.........................                      (39)
                                                             ------
       Other Comprehensive Loss...........                      (49)              (49)            (49)
                                                             ------
          Comprehensive Income............                   $  814
                                                             ======
Net Cash Contribution To Owner............       (993)                                           (993)
Other Transfers From Owner................          4                                               4
                                              -------                           -----         -------
Balance December 31, 1996.................      6,636                             (57)          6,579
Comprehensive Income
  Net Income..............................      1,097        $1,097                             1,097
  Other Comprehensive Income (Loss):
     Minimum Pension Liability
       Adjustment.........................                      (13)
     Foreign Currency Translation
       Adjustment.........................                     (121)
                                                             ------
       Other Comprehensive Loss...........                     (134)             (134)           (134)
                                                             ------
          Comprehensive Income............                   $  963
                                                             ======
Net Cash Contribution From Owner..........        360                                             360
Other Transfers To Owner..................         (6)                                             (6)
                                              -------                           -----         -------
Balance December 31, 1997.................    $ 8,087                           $(191)        $ 7,896
                                              =======                           =====         =======
</TABLE>
    
 
            See accompanying Notes to Combined Financial Statements
 
                                       F-6
<PAGE>   140
 
                     NOTES TO COMBINED FINANCIAL STATEMENTS
                    (DOLLARS IN MILLIONS, EXCEPT PER SHARE)
 
1. BASIS OF PRESENTATION
 
     On May 11, 1998, E. I. du Pont de Nemours and Company ("DuPont") announced
its intention to offer in an initial public offering a portion of its interest
in the common stock of Conoco Inc., a wholly owned energy subsidiary. This
initial public offering is DuPont's first step in the planned divestiture of its
entire Petroleum business.
 
     Throughout the period covered by the Combined Financial Statements,
operations were conducted by Conoco Inc., subsidiaries of Conoco Inc. and, in
some cases, subsidiaries of DuPont. These operations are collectively referred
to herein as the "Company" or "Conoco". Certain subsidiaries and, in some cases,
assets, liabilities, and related operations not currently owned by Conoco will
be transferred to Conoco.
 
     Conoco is an integrated, global energy company with two principal business
segments. The Upstream segment includes the exploration for, development,
production and sale of crude oil, natural gas and natural gas liquids. The
Downstream segment includes the refining of crude oil and other feedstocks into
petroleum products, buying and selling crude oil and refined products, and
transporting, distributing and marketing petroleum products. Corporate and Other
activities include general corporate expenses, financing costs and other
nonoperating items, and results for electric power and related-party insurance
operations.
 
     The accompanying Combined Financial Statements are presented on a carve-out
basis and include the historical operations of both entities owned by Conoco and
operations to be transferred to Conoco by DuPont. In this context, no direct
ownership relationship existed among all the various units comprising Conoco;
accordingly, DuPont and its subsidiaries' net investment in Conoco ("Owner's Net
Investment") is shown in lieu of Stockholder's Equity in the Combined Financial
Statements. The Combined Financial Statements included herein have been prepared
from DuPont's historical accounting records.
 
     Certain international assets relating primarily to the business of DuPont
may be held by the Company or its subsidiaries at the closing of the Offerings
pending receipt of consents or other approval or satisfaction of other
applicable foreign requirements necessary for the transfer of such assets to
DuPont. In addition, certain international assets relating primarily to the
business of the Company may be held by DuPont or other of its subsidiaries at
the closing of the Offerings pending receipt of consents or approvals or
satisfaction of other applicable foreign requirements necessary for the transfer
of such assets to the Company. Additionally, there are certain subsidiaries of
DuPont which will not be owned by the Company as of the closing of the Offerings
and which DuPont will not thereafter be obligated to transfer to the Company.
DuPont and the Company intend to negotiate for the sale of such subsidiaries
within the six months following the closing of the Offerings at a purchase price
equal to their then fair market value. DuPont and the Company estimate that the
fair market value of such subsidiaries at July, 1998 is approximately $20
million and cannot predict at what price any such sale may occur. All of the
above subsidiaries, which are immaterial to total assets and results of
operations of the Company, have been included in the Combined Financial
Statements.
 
     The Combined Statement of Income includes all revenues and costs directly
attributable to Conoco, including costs for facilities, functions and services
used by Conoco at shared sites and costs for certain functions and services
performed by centralized DuPont organizations and directly charged to Conoco
based on usage. In addition, services performed by Conoco on DuPont's behalf are
directly charged to DuPont. The results of operations also include allocations
of DuPont's general corporate expenses.
 
     All charges and allocations of cost for facilities, functions and services
performed by DuPont organizations for Conoco have been deemed to have been paid
by Conoco to DuPont, in cash, in the period in which the cost was recorded in
the Combined Financial Statements. Allocations of current income taxes
receivable or payable are deemed to have been remitted, in cash, by or to DuPont
in the period the related income taxes were recorded.
 
     All of the allocations and estimates in the Combined Financial Statements
are based on assumptions that management believes are reasonable under the
circumstances. However, these allocations and estimates are
                                       F-7
<PAGE>   141
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
                    (DOLLARS IN MILLIONS, EXCEPT PER SHARE)
 
not necessarily indicative of the costs and expenses that would have resulted if
Conoco had been operated as a separate entity.
 
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
     Conoco observes the generally accepted accounting principles described
below.
 
BASIS OF COMBINATION
 
   
     The accounts of wholly owned and majority-owned subsidiaries are included
in the Combined Financial Statements. The equity method is used to account for
investments in corporate entities, partnerships, and limited liability companies
in which the Company exerts significant influence, generally having a 20-50%
ownership interest. The Company's 50.1 percent non-controlling interest in
Petrozuata CA in Venezuela is accounted for using the equity method because the
minority shareholder, a subsidiary of the national oil company of the Republic
of Venezuela, has substantive participating rights, primarily related to
fundamental operating and management decisions, which preclude consolidation.
Undivided interests in oil and gas joint ventures and transportation assets are
combined on a pro rata basis. Other investments, excluding marketable
securities, are generally carried at cost.
    
 
USE OF ESTIMATES
 
     The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets, liabilities, revenues
and expenses, and the disclosures of contingent assets and liabilities. Actual
results may differ from those estimates and assumptions.
 
CASH EQUIVALENTS
 
     Cash equivalents represent investments with maturities of three months or
less from time of purchase. They are carried at cost plus accrued interest,
which approximates fair value.
 
INVENTORIES
 
     Inventories are carried at the lower of cost or market. Cost is determined
under the last-in, first-out (LIFO) method for inventories of crude oil and
petroleum products. Cost for remaining inventories, principally materials and
supplies, is generally determined by the average cost method. Market is
determined on a regional basis and any lower of cost or market write-down is
recorded as a permanent adjustment to the cost of inventory.
 
PROPERTY, PLANT AND EQUIPMENT (PP&E)
 
     PP&E is carried at cost. Depreciation of PP&E, other than oil and gas
properties, is generally computed on a straight-line basis over the estimated
economic lives of the facilities, which for major assets range from 14 to 25
years. When assets that are part of a composite group are retired, sold,
abandoned or otherwise disposed of, the cost, net of sales proceeds or salvage
value, is charged against accumulated depreciation, depletion and amortization.
Where depreciation is accumulated for specific assets, gains or losses on
disposal are included in period income.
 
     Maintenance and repairs are charged to expense; replacements and
improvements are capitalized.
 
                                       F-8
<PAGE>   142
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
                    (DOLLARS IN MILLIONS, EXCEPT PER SHARE)
 
OIL AND GAS PROPERTIES
 
     The Company follows the successful efforts method of accounting, under
which the costs of property acquisitions, successful exploratory wells, all
development costs, and support equipment and facilities are capitalized. The
costs of producing properties are amortized at the field level on a
unit-of-production method.
 
     Unproved properties which are individually significant are periodically
assessed for impairment, whereas the impairment of individually insignificant
properties is provided by amortizing the costs based on past experience and the
estimated holding period. Exploratory well costs are expensed in the period the
well is determined to be unsuccessful. All other exploration costs, including
geological and geophysical costs, production costs, and overhead costs are
expensed in the period incurred.
 
     The estimated costs of dismantlement and removal of oil and gas related
facilities are recognized over the properties' productive lives using the
unit-of-production method.
 
IMPAIRMENT OF LONG-LIVED ASSETS
 
     Long-lived assets with recorded values that are not expected to be
recovered through future cash flows are written down to current fair value
through additional amortization or depreciation provisions. Fair value is
generally determined from estimated discounted future net cash flows.
 
ENVIRONMENTAL COSTS
 
     Environmental expenditures are expensed or capitalized, as appropriate,
depending on their future economic benefit. Expenditures that relate to an
existing condition caused by past operations, and that do not have future
economic benefit, are expensed. Liabilities related to these future costs are
recorded on an undiscounted basis when environmental assessments and/or
remediation activities are probable and the costs can be reasonably estimated.
 
INCOME TAXES
 
   
     As Conoco is included in the DuPont consolidated tax return, the provision
for income taxes has been determined using the loss benefit method of the asset
and liability approach of accounting for income taxes. Under the loss benefit
method, the current tax provision or benefit is allocated based on the amount
expected to be paid or received from the consolidated group and benefits of
losses and credit carryforwards are recorded when such benefits are expected to
be realized by members of the consolidated group. The provision for income taxes
represents income taxes paid or payable for the current year plus the change in
deferred taxes during the year. The pro forma effect on the Statement of Income
of reflecting the provision for income taxes on a separate return basis is not
material.
    
 
   
     Deferred taxes result from differences between the financial and tax bases
of the Company's assets and liabilities and are adjusted for changes in tax
rates and tax laws when changes are enacted. Valuation allowances are recorded
to reduce deferred tax assets when it is more likely than not that a tax benefit
will not be realized by the consolidated group.
    
 
     Provision has been made for income taxes on unremitted earnings of
subsidiaries and affiliates, except in cases in which earnings are deemed to be
permanently invested.
 
FOREIGN CURRENCY TRANSLATION
 
   
     Through December 31, 1995, the Company had determined that the United
States dollar was the "functional currency" of its worldwide operations. For
subsidiaries where the United States dollar is the functional currency, all
foreign currency asset and liability amounts are remeasured into United States
dollars at end-of-period exchange rates, except for inventories, prepaid
expenses and property, plant and equipment,
    
 
                                       F-9
<PAGE>   143
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
                    (DOLLARS IN MILLIONS, EXCEPT PER SHARE)
 
which are remeasured at historical rates. Foreign currency income and expenses
are remeasured at average exchange rates in effect during the year, except for
expenses related to balance sheet amounts which are remeasured at historical
exchange rates. Exchange gains and losses arising from remeasurement of foreign
currency-denominated monetary assets and liabilities are included in current
period income.
 
     Effective January 1, 1996, local currency was adopted as the functional
currency for the Company's integrated Western European petroleum operations to
properly reflect changed circumstances in the primary economic environment in
which these subsidiaries operate. For subsidiaries whose functional currency is
the local currency, assets and liabilities denominated in local currency are
translated into United States dollars at end-of-period exchange rates, and the
resultant translation adjustment is disclosed in the Combined Balance Sheet.
Assets and liabilities denominated in other than the local currency are
remeasured into the local currency prior to translation into United States
dollars, and the resultant exchange gains or losses, together with their related
tax effects, are included in income in the period in which they occur. Income
and expenses are translated into United States dollars at average exchange rates
in effect during the period.
 
COMMODITY HEDGING AND TRADING ACTIVITIES
 
     The Company enters into energy-related futures, forwards, swaps, and
options in various markets to balance its physical systems, to meet customer
needs, and to manage its exposure to price fluctuations on anticipated crude
oil, natural gas, refined product and electric power transactions.
 
     Under the Company's policy, hedging includes only those transactions that
offset physical positions and reduce overall exposure to prevailing market price
risk. Trading is defined as any transaction that does not meet the definition of
hedging.
 
     Gains and losses on hedging contracts are deferred and included in the
measurement of the related transaction. Changes in market values of trading
contracts are reflected in income in the period the change occurs.
 
     In the event a derivative designated as a hedge is terminated prior to the
maturation of the hedged transaction, gains or losses realized at termination
are deferred and included in the measurement of the hedged transaction. If a
hedged transaction matures, is sold, extinguished or terminated prior to the
maturity of a derivative designated as a hedge of such transaction, gains or
losses associated with the derivative through the date the transaction matured
are included in the measurement of the hedged transaction and the derivative is
reclassified as for trading purposes. Derivatives designated as a hedge of an
anticipated transaction are reclassified as for trading purposes if the
anticipated transaction is no longer likely to occur.
 
     In the Combined Statement of Cash Flows, the Company reports the cash flows
resulting from its hedging activities in the same category as the related item
that is being hedged.
 
EARNINGS PER SHARE
 
     The Company's historical capital structure is not indicative of its
prospective structure since no direct ownership relationship existed among all
the various units comprising Conoco. Accordingly, historical earnings per share
has not been presented in the Combined Financial Statements.
 
   
     Unaudited pro forma basic earnings per share includes the shares of both
the Class A and the Class B common shares deemed to be outstanding as of the
date of the Offerings. Unaudited pro forma diluted earnings per share includes
the dilutive effect of the 5.8 million shares of Conoco Common Stock issuable
upon exercise of Conoco stock options (see Note 20 to the Combined Financial
Statements), after applying the treasury stock method, which are expected to be
issued upon cancellation of outstanding DuPont stock options, using the
anticipated weighted-average exercise price of the outstanding options and the
anticipated initial public offering price. In accordance with SEC Staff
Accounting Bulletin No. 98, pro forma basic and
    
 
                                      F-10
<PAGE>   144
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
                    (DOLLARS IN MILLIONS, EXCEPT PER SHARE)
 
diluted earnings per share have been presented for the most recent annual and
subsequent interim periods only.
 
RECENT ACCOUNTING STANDARDS
 
     In June 1997, the Financial Accounting Standards Board issued Statement No.
130, "Reporting Comprehensive Income," and Statement No. 131, "Disclosures about
Segments of an Enterprise and Related Information." The accompanying financial
statements reflect application of the provisions of Statement No. 130. The
Company is required to adopt Statement No. 131 for the 1998 annual report and
disclose segment information on the same basis used internally for evaluating
segment performance and deciding how to allocate resources to segments. The
Company is currently assessing the effect of Statement No. 131; however, its
adoption will have no financial impact on the Company.
 
     In February 1998, the Financial Accounting Standards Board issued Statement
No. 132, "Employers' Disclosure About Pension and Other Postretirement
Benefits," that revised disclosure requirements for pension and other
postretirement benefits. It does not affect the measurement of the expense of
the Company's pension and other postretirement benefits. The Company is required
to adopt this Statement for the 1998 annual report and is currently assessing
the effect of the new disclosure.
 
     In June 1998, the Financial Accounting Standards Board issued Statement No.
133, "Accounting for Derivative Instruments and Hedging Activities" which
requires that companies recognize all derivatives as either assets or
liabilities in the balance sheet and measure those instruments at fair value.
The Company is required to adopt this Statement by the first quarter of 2000 and
is currently assessing the effect of the new standard.
 
     Statement No. 133 provides, if certain conditions are met, that a
derivative may be specifically designated as (1) a hedge of the exposure to
changes in the fair value of a recognized asset or liability or an unrecognized
firm commitment (fair value hedge), (2) a hedge of the exposure to variable cash
flows of a forecasted transaction (cash flow hedge), or (3) a hedge of the
foreign currency exposure of a net investment in a foreign operation, an
unrecognized firm commitment, an available-for-sale security or a
foreign-currency-denominated forecasted transaction (foreign currency hedge).
 
     Under Statement No. 133, the accounting for changes in fair value of a
derivative depends on its intended use and designation. For a fair value hedge,
the gain or loss is recognized in earnings in the period of change together with
the offsetting loss or gain on the hedged item. For a cash flow hedge, the
effective portion of the derivative's gain or loss is initially reported as a
component of other comprehensive income and subsequently reclassified into
earnings when the forecasted transaction affects earnings. For a foreign
currency hedge, the gain or loss is reported in other comprehensive income as
part of the cumulative translation adjustment. For all other items not
designated as hedging instruments, the gain or loss is recognized in earnings in
the period of change.
 
3. RELATED PARTY TRANSACTIONS
 
     The Combined Financial Statements include significant transactions with
DuPont involving services (such as cash management, other financial services,
purchasing, legal, computer and corporate aviation) and general corporate
expenses that were provided between Conoco and centralized DuPont organizations.
The costs of services have been directly charged or allocated between Conoco and
DuPont using methods management believes are reasonable. These methods include
negotiated usage rates, dedicated asset assignment, and proportionate corporate
formulas involving assets, revenues, and employees. Such charges and allocations
are not necessarily indicative of what would have been incurred if Conoco had
been a separate entity.
 
                                      F-11
<PAGE>   145
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
                    (DOLLARS IN MILLIONS, EXCEPT PER SHARE)
 
     Amounts charged and allocated to Conoco for these services were $103, $101
and $125 for the years 1995, 1996 and 1997, respectively, and are principally
included in Selling, General and Administrative Expenses. Conoco provided DuPont
services such as computer, legal and purchasing, as well as certain technical
and plant operating services, which amounted to $66, $66 and $62 in 1995, 1996
and 1997, respectively. These charges to DuPont were treated as reductions of
Cost of Goods Sold and Other Operating Expenses and Selling, General and
Administrative Expenses.
 
     Interest expense charged by DuPont was $154, $143 and $124 for the years
1995, 1996 and 1997, respectively, and reflects market-based rates. A portion of
this and other interest and debt expense was capitalized as cost associated with
major construction projects. Interest income from DuPont was $47, $57 and $11
for the same years and also reflects market-based rates.
 
     Sales and Other Operating Revenues include sales of products from Conoco to
DuPont, principally natural gas and gas liquids to supply several DuPont plant
sites. These sales totaled $278, $413 and $420 for the years 1995, 1996 and
1997, respectively. Also included are revenues from insurance premiums charged
to DuPont for property and casualty coverage outside the United States. These
revenues totaled $20, $21 and $22 for the years 1995, 1996 and 1997,
respectively. Purchases of products from DuPont during these periods were not
material.
 
   
     These intercompany arrangements between DuPont and Conoco will continue
after the Offerings under transition service agreements or other long-term
agreements. It is not anticipated that a change, if any, in these costs and
revenues would have a material effect on the Company's results of operations or
combined financial position.
    
 
     Accounts and Notes Receivable include amounts due from DuPont of $110 and
$79 at December 31, 1996 and 1997, respectively, representing current month
balances of transactions between Conoco and DuPont, mainly product sales, net
interest on borrowings, and certain charges billed annually. Accounts Payable
include amounts due DuPont of $5 and $4 at December 31, 1996 and 1997,
respectively.
 
     Amounts representing notes receivable or borrowings from DuPont, including
its subsidiary organizations, are identified for related parties and presented
separately in the Combined Balance Sheet. The current portion of Notes
Receivable represents the accumulation of a variety of cash transfers and
operating transactions with DuPont. These balances are generally interest
bearing and represent net amounts of cash transferred for funding and cash
management purposes and amounts charged between the companies for certain
product and service purchases and asset transfers. The long-term portion of
Notes Receivable and amounts shown for Short-Term and Long-Term Borrowings
represent borrowings between Conoco and DuPont with established due dates at
market-based interest rates, except for certain short-term non-interest bearing
borrowings due DuPont of $168 and $492 at December 31, 1996 and 1997,
respectively. At December 31, 1997, the long-term portion of borrowings from
related parties totaled $1,450 and reflected a weighted average interest rate of
6.6 percent with maturities of $633 in 1999, $430 in 2000, and $387 in 2001.
 
4. OTHER INCOME
 
<TABLE>
<CAPTION>
                                                              1995   1996   1997
                                                              ----   ----   ----
<S>                                                           <C>    <C>    <C>
Interest income
  Related parties (see Note 3)..............................  $ 47   $ 57   $ 11
  Other, net of miscellaneous interest expense..............    71     67     66
                                                              ----   ----   ----
                                                               118    124     77
Equity in earnings of affiliates (see Note 11)..............    22    (25)    40
Gain on sales of assets.....................................    63     84    314(1)
Exchange gain (loss)........................................   (44)    (5)    27
Other -- net................................................    31      8      9
                                                              ----   ----   ----
                                                              $190   $186   $467
                                                              ====   ====   ====
</TABLE>
 
- ---------------
 
     (1) Includes benefit of $239 from gain on the sale of certain Upstream
North Sea properties.
 
                                      F-12
<PAGE>   146
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
                    (DOLLARS IN MILLIONS, EXCEPT PER SHARE)
 
5. TAXES OTHER THAN ON INCOME
 
<TABLE>
<CAPTION>
                                                               1995     1996     1997
                                                              ------   ------   ------
<S>                                                           <C>      <C>      <C>
Petroleum excise taxes
  U.S. .....................................................  $1,060   $1,145   $1,201
  Non-U.S. .................................................   4,595    4,316    4,148
                                                              ------   ------   ------
                                                               5,655    5,461    5,349
Payroll taxes...............................................      51       48       43
Property taxes..............................................      63       55       63
Production and other taxes..................................      54       73       77
                                                              ------   ------   ------
                                                              $5,823   $5,637   $5,532
                                                              ======   ======   ======
</TABLE>
 
6. INTEREST AND DEBT EXPENSE
 
<TABLE>
<CAPTION>
                                                              1995   1996   1997
                                                              ----   ----   ----
<S>                                                           <C>    <C>    <C>
Interest and debt cost incurred
  Related parties (see Note 3)..............................  $154   $143   $124
  Other.....................................................    15      6      6
                                                              ----   ----   ----
                                                               169    149    130
Less: Interest and debt cost capitalized....................    95     75     94
                                                              ----   ----   ----
Interest and debt expense...................................  $ 74   $ 74   $ 36
                                                              ====   ====   ====
</TABLE>
 
     Interest paid (net of amounts capitalized) was $80 in 1995, $77 in 1996 and
$33 in 1997.
 
7. PROVISION FOR INCOME TAXES
 
<TABLE>
<CAPTION>
                                                              1995    1996     1997
                                                              ----   ------   ------
<S>                                                           <C>    <C>      <C>
Current tax expense:
  U.S. federal..............................................  $(45)  $  155   $   64
  U.S. state and local......................................     1        8        5
  Non-U.S. .................................................   685      865      925
                                                              ----   ------   ------
          Total.............................................   641    1,028      994
                                                              ----   ------   ------
Deferred tax expense:
  U.S. federal..............................................   112      (78)      80
  U.S. state and local......................................     3       --        8
  Non-U.S. .................................................    18       88      (72)
                                                              ----   ------   ------
          Total.............................................   133       10       16
                                                              ----   ------   ------
Provision for Income Taxes..................................   774    1,038    1,010
Minimum Pension Liability(1)................................    (1)      (5)      (7)
                                                              ----   ------   ------
          Total Provision...................................  $773   $1,033   $1,003
                                                              ====   ======   ======
</TABLE>
 
- ---------------
 
(1) Represents deferred tax provision for minimum pension liability adjustment.
 
     Total income taxes paid worldwide were $745 in 1995, $901 in 1996 and $935
in 1997.
 
                                      F-13
<PAGE>   147
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
                    (DOLLARS IN MILLIONS, EXCEPT PER SHARE)
 
     The significant components of deferred tax assets and liabilities at
December 31, 1996 and 1997 are as follows:
 
<TABLE>
<CAPTION>
                                                            1996                 1997
                                                      -----------------   ------------------
                    DEFERRED TAX                      ASSET   LIABILITY   ASSET    LIABILITY
                    ------------                      -----   ---------   ------   ---------
<S>                                                   <C>     <C>         <C>      <C>
Property, plant and equipment.......................  $108     $2,276     $  182    $2,219
Employee benefits...................................   162         --        166        --
Other accrued expenses..............................   277         --        273        --
Inventories.........................................    --         88         --       102
Tax loss/tax credit carryforwards...................   408         --        417        --
Other...............................................    26         52         27       169
                                                      ----     ------     ------    ------
          Total.....................................  $981     $2,416     $1,065    $2,490
                                                               ======               ======
Less: Valuation allowance...........................   414                   392
                                                      ----                ------
Net.................................................  $567                $  673
                                                      ====                ======
</TABLE>
 
     Valuation allowances, which reduce deferred tax assets to an amount that
will more likely than not be realized, have been increased by $12 and $52 during
the years 1995 and 1996, respectively. These changes, which are reflected in the
provision for income taxes, offset increases in deferred tax assets resulting
primarily from operating losses incurred in exploration and startup operations.
In 1997, the valuation allowance decreased $22, principally reflecting a $37
decrease related to deferred tax assets representing operating losses which the
Company determined will more likely than not be realized in future years. This
decrease was partially offset by an increase of $15 reflecting offsets to
operating losses.
 
     Current deferred tax liabilities (included in the Combined Balance Sheet
caption "Income Taxes") were $107 and $122 at December 31, 1996 and 1997,
respectively.
 
     Current deferred tax assets included in Prepaid Expenses were $25 and $7 at
December 31, 1996 and 1997, respectively. In addition, Other Assets includes
deferred tax assets of $37 at December 31, 1997.
 
     An analysis of the Company's effective income tax rate follows:
 
<TABLE>
<CAPTION>
                                                              1995     1996     1997
                                                              ----     ----     ----
<S>                                                           <C>      <C>      <C>
Statutory U.S. federal income tax rate......................  35.0%    35.0%    35.0%
Higher effective tax rate on non-U.S. operations............  27.0     21.6     13.9
Alternative fuels credit....................................  (4.5)    (3.4)    (3.0)
Other -- net................................................   (.1)     1.4      2.0
                                                              ----     ----     ----
Effective income tax rate...................................  57.4%    54.6%    47.9%
                                                              ====     ====     ====
</TABLE>
 
     Earnings before income taxes shown below are based on the location of the
corporate unit to which such earnings are attributable. However, since such
earnings are often subject to taxation in more than one country, the income tax
provision shown above as U.S. or non-U.S. does not correspond to the earnings
set forth below.
 
<TABLE>
<CAPTION>
                                                              1995     1996     1997
                                                             ------   ------   ------
<S>                                                          <C>      <C>      <C>
U.S........................................................  $  417   $  563   $  740
Other regions..............................................     932    1,338    1,367
                                                             ------   ------   ------
                                                             $1,349   $1,901   $2,107
                                                             ======   ======   ======
</TABLE>
 
     At December 31, 1996 and 1997, respectively, unremitted earnings of
non-U.S. subsidiaries totaling $1,210 and $1,645 were deemed to be permanently
invested. No deferred tax liability has been recognized with regard to the
remittance of such earnings. It is not practicable to estimate the income tax
liability that might be incurred if such earnings were remitted to the United
States.
 
                                      F-14
<PAGE>   148
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
                    (DOLLARS IN MILLIONS, EXCEPT PER SHARE)
 
     Under the tax laws of various jurisdictions in which the Company operates,
deductions or credits that cannot be fully utilized for tax purposes during the
current year may be carried forward, subject to statutory limitations, to reduce
taxable income or taxes payable in a future year. At December 31, 1997, the tax
effect of such carryforwards approximated $417. Of this amount, $127 has no
expiration date, $11 expires in 1998, $38 expires in 1999, $75 expires in
2000-2001 and $166 expires in 2002.
 
8. ACCOUNTS AND NOTES RECEIVABLE
 
<TABLE>
<CAPTION>
                                                                DECEMBER 31
                                                              ---------------
                                                               1996     1997
                                                              ------   ------
<S>                                                           <C>      <C>
Trade.......................................................  $1,062   $  916
Related parties (see Note 3)................................     110       79
Other.......................................................     322      502
                                                              ------   ------
                                                              $1,494   $1,497
                                                              ======   ======
</TABLE>
 
     See Note 26 for a description of business segment markets and associated
concentrations of credit risk.
 
9. INVENTORIES
 
<TABLE>
<CAPTION>
                                                              DECEMBER 31
                                                              -----------
                                                              1996   1997
                                                              ----   ----
<S>                                                           <C>    <C>
Crude oil and petroleum products............................  $675   $675
Other merchandise...........................................    19     25
Materials and supplies......................................   112    130
                                                              ----   ----
                                                              $806   $830
                                                              ====   ====
</TABLE>
 
     The excess of current cost over book value of inventories valued under the
LIFO method was $337 and $152 at December 31, 1996 and 1997, respectively.
Inventories valued at LIFO represented 84 percent and 81 percent of combined
inventories, at December 31, 1996 and 1997, respectively.
 
     During 1995, 1996 and 1997, certain LIFO inventory quantities were reduced
resulting in partial liquidation of the LIFO bases, with no material effect on
net income.
 
10. PROPERTY, PLANT AND EQUIPMENT
 
<TABLE>
<CAPTION>
                                                              DECEMBER 31
                                                 -------------------------------------
                                                       GROSS                NET
                                                 -----------------   -----------------
                                                  1996      1997      1996      1997
                                                 -------   -------   -------   -------
<S>                                              <C>       <C>       <C>       <C>
Oil and Gas Properties
  Unproved.....................................  $   913   $ 1,491   $   756   $ 1,230
  Proved.......................................   11,914    12,420     5,185     5,480
Other..........................................    1,045     1,316       609       871
                                                 -------   -------   -------   -------
     Total Upstream............................   13,872    15,227     6,550     7,581
Refining.......................................    3,831     3,803     2,203     1,952
Marketing & Distribution.......................    2,278     2,199     1,329     1,295
                                                 -------   -------   -------   -------
     Total Downstream..........................    6,109     6,002     3,532     3,247
                                                 -------   -------   -------   -------
                                                 $19,981   $21,229   $10,082   $10,828
                                                 =======   =======   =======   =======
</TABLE>
 
     Property, Plant and Equipment includes Downstream gross assets acquired
under capital leases of $41 at December 31, 1996 and 1997; related amounts
included in Accumulated Depreciation, Depletion and Amortization were $7 and $10
at December 31, 1996 and 1997, respectively.
 
                                      F-15
<PAGE>   149
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
                    (DOLLARS IN MILLIONS, EXCEPT PER SHARE)
 
11. SUMMARIZED FINANCIAL INFORMATION FOR AFFILIATED COMPANIES
 
     Summarized combined financial information for affiliated companies for
which Conoco uses the equity method of accounting (see Note 2, "Basis of
Combination") is shown below on a 100 percent basis. Dividends received from
equity affiliates were $42 in 1995, $85 in 1996 and $58 in 1997.
 
<TABLE>
<CAPTION>
                                                              YEAR ENDED DECEMBER 31
                                                             ------------------------
                                                              1995     1996     1997
                                                             ------   ------   ------
<S>                                                          <C>      <C>      <C>
RESULTS OF OPERATIONS
 
Sales(1)...................................................  $4,368   $6,622   $7,521
Earnings before income taxes...............................     380      305      556
Net income.................................................     228      140      345
Conoco's equity in earnings of affiliates (see Note 4).....      22      (25)      40
</TABLE>
 
- ---------------
 
(1) Includes sales to Conoco of $262 in 1995, $359 in 1996 and $568 in 1997.
 
<TABLE>
<CAPTION>
                                                                DECEMBER 31
                                                              ---------------
                                                               1996     1997
                                                              ------   ------
<S>                                                           <C>      <C>
FINANCIAL POSITION
 
Current assets..............................................  $1,503   $2,543
Non-current assets..........................................   5,218    6,826
                                                              ------   ------
          Total assets......................................  $6,721   $9,369
                                                              ------   ------
Short-term borrowings*......................................  $  241   $  550
Other current liabilities...................................     929    1,308
Long-term borrowings*.......................................   3,097    4,364
Other long-term liabilities.................................     646      645
                                                              ------   ------
          Total liabilities.................................  $4,913   $6,867
                                                              ------   ------
Conoco's investment in affiliates (includes advances).......  $  703   $1,085
                                                              ======   ======
</TABLE>
 
- ---------------
 
   
* Conoco's pro rata interest in total borrowings was $935 in 1996 and $1,586 in
  1997, of which $453 in 1996 and $826 in 1997 were guaranteed by the Company.
  These amounts are included in the guarantees disclosed in Note 25.
    
 
     At December 31, 1997, Conoco's equity in undistributed earnings of its
affiliated companies was $79.
 
12. OTHER ASSETS
 
<TABLE>
<CAPTION>
                                                              DECEMBER 31
                                                              ------------
                                                              1996    1997
                                                              ----    ----
<S>                                                           <C>     <C>
Prepaid pension cost (see Note 23)..........................  $ 79    $ 71
Long-term notes receivables.................................    26      74
Other securities and investments............................   482     100
Other.......................................................   187     247
                                                              ----    ----
                                                              $774    $492
                                                              ====    ====
</TABLE>
 
     Other securities and investments include $478 and $97 at December 31, 1996
and 1997, respectively, representing marketable securities classified as
available for sale and reported at fair value. The remainder represents numerous
small investments which are reported at cost.
 
                                      F-16
<PAGE>   150
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
                    (DOLLARS IN MILLIONS, EXCEPT PER SHARE)
 
13. ACCOUNTS PAYABLE
 
<TABLE>
<CAPTION>
                                                                DECEMBER 31
                                                              ----------------
                                                               1996      1997
                                                              ------    ------
<S>                                                           <C>       <C>
Trade.......................................................  $  804    $  969
Payables to banks...........................................     216       117
Related parties (see Note 3)................................       5         4
                                                              ------    ------
                                                              $1,025    $1,090
                                                              ======    ======
</TABLE>
 
     Payables to banks represent checks issued on certain disbursement accounts
but not presented to the banks for payment.
 
14. OTHER SHORT-TERM BORROWINGS AND CAPITAL LEASE OBLIGATIONS
 
<TABLE>
<CAPTION>
                                                              DECEMBER 31
                                                              ------------
                                                              1996    1997
                                                              ----    ----
<S>                                                           <C>     <C>
Industrial development bonds................................  $24     $24
Bank borrowings (foreign currency)..........................   --      21
Long-term borrowings payable within one year................    4      25
Capital lease obligations...................................    4       2
                                                              ---     ---
                                                              $32     $72
                                                              ===     ===
</TABLE>
 
     The Company has uncommitted short-term bank credit lines of approximately
$55 and $42 at December 31, 1996 and 1997, respectively. These lines are
denominated in various foreign currencies to support general operating needs in
their respective countries. No advances were outstanding under these lines at
these respective dates.
 
     The weighted average interest rate on other short-term borrowings
outstanding at December 31, 1996 and 1997 was 3.8 percent and 3.7 percent,
respectively.
 
15. OTHER ACCRUED LIABILITIES
 
<TABLE>
<CAPTION>
                                                                DECEMBER 31
                                                              ----------------
                                                               1996      1997
                                                              ------    ------
<S>                                                           <C>       <C>
Taxes other than on income..................................  $  309    $  376
Operating expenses..........................................     334       343
Payroll and other employee-related costs....................     133       135
Accrued postretirement benefits cost (see Note 22)..........      16        24
Other.......................................................     318       411
                                                              ------    ------
                                                              $1,110    $1,289
                                                              ======    ======
</TABLE>
 
                                      F-17
<PAGE>   151
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
                    (DOLLARS IN MILLIONS, EXCEPT PER SHARE)
 
16. OTHER LONG-TERM BORROWINGS AND CAPITAL LEASE OBLIGATIONS
 
<TABLE>
<CAPTION>
                                                              DECEMBER 31
                                                              ------------
                                                              1996    1997
                                                              ----    ----
<S>                                                           <C>     <C>
5.75% notes due 2026........................................  $ 16    $ 16
6.50% notes due 2008........................................     7       7
Other loans (various currencies) due 1998-2007*.............    21      30
Capitalization obligations to affiliates due 1998-1999......    22      20
Capital lease obligations...................................    35      33
                                                              ----    ----
                                                              $101    $106
                                                              ====    ====
</TABLE>
 
- ---------------
 
* Average interest rates were 6.0 percent and 7.3 percent at December 31, 1996
  and 1997, respectively.
 
     Maturities of long-term borrowings, together with sinking fund requirements
for years ending after December 31, 1998 are $24, $4, $4, and $4 for the years
1999, 2000, 2001 and 2002, respectively.
 
17. OTHER LIABILITIES AND DEFERRED CREDITS
 
<TABLE>
<CAPTION>
                                                                DECEMBER 31
                                                              ----------------
                                                               1996      1997
                                                              ------    ------
<S>                                                           <C>       <C>
Deferred gas revenue*.......................................  $   --    $  379
Accrued postretirement benefits cost (see Note 22)..........     327       318
Abandonment costs...........................................     317       310
Accrued pension liability (see Note 23).....................     165       230
Environmental remediation costs (see Note 25)...............     140       132
Other.......................................................     441       553
                                                              ------    ------
                                                              $1,390    $1,922
                                                              ======    ======
</TABLE>
 
- ---------------
 
* Includes $303 received from a contract for future sales of natural gas to
  Centrica, a United Kingdom gas marketing company.
 
18. MINORITY INTERESTS
 
     In 1996, certain upstream subsidiaries contributed assets with an aggregate
fair value of $613 to Conoco Oil & Gas Associates L.P. (COGA) for a general
partnership interest of 67 percent. The remaining 33 percent was purchased by
Vanguard Energy Investors L.P. (Vanguard) as a limited partner. The net result
of this transaction was to increase minority interests by $297.
 
     Vanguard is entitled to a cumulative annual priority return on its
investment and participation in residual earnings at rates established in the
partnership agreement. The priority return rate, currently 6.52 percent, is
negotiated every four years commencing in 1999. In the event the parties are
unable to agree on a new return rate, the partnership would be liquidated with
resultant cash outflows not expected to be materially different from the
recorded amount of minority interest. Vanguard's share of COGA's earnings was
$18 or 17 percent in 1996 and $22 or 18 percent in 1997.
 
                                      F-18
<PAGE>   152
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
                    (DOLLARS IN MILLIONS, EXCEPT PER SHARE)
 
19. OTHER COMPREHENSIVE INCOME
 
     Changes in related components of other comprehensive income (loss) are
reported net of associated income tax effects as summarized below:
 
<TABLE>
<CAPTION>
                                                                  YEAR ENDED DECEMBER 31
                            ---------------------------------------------------------------------------------------------------
                                         1995                              1996                              1997
                            -------------------------------   -------------------------------   -------------------------------
                            PRETAX   INCOME TAX   AFTER-TAX   PRETAX   INCOME TAX   AFTER-TAX   PRETAX   INCOME TAX   AFTER-TAX
                            ------   ----------   ---------   ------   ----------   ---------   ------   ----------   ---------
<S>                         <C>      <C>          <C>         <C>      <C>          <C>         <C>      <C>          <C>
Minimum Pension Liability
  Adjustment..............   $(3)       $(1)         $(2)      $(15)      $(5)        $(10)     $ (20)      $(7)        $ (13)
Foreign Currency
  Translation
  Adjustment*.............                                      (39)       --          (39)      (121)       --          (121)
                             ---        ---          ---       ----       ---         ----      -----       ---         -----
Other Comprehensive Income
  (Loss)..................   $(3)       $(1)         $(2)      $(54)      $(5)        $(49)     $(141)      $(7)        $(134)
                             ===        ===          ===       ====       ===         ====      =====       ===         =====
</TABLE>
 
- ---------------
 
* Effective January 1, 1996, local currency was adopted as the functional
  currency for the Company's integrated Western European petroleum operations to
  properly reflect changed circumstances in their primary economic environment.
 
20. COMPENSATION PLANS
 
   
     Employees of Conoco participate in stock-based compensation plans that are
administered through DuPont and involve options to acquire DuPont common stock.
Accordingly, option and expense information presented herein represents the
Company's portion of the overall plans.
    
 
   
     Subject to completion of the Offerings, the Company and DuPont expect to
give certain current employees of the Company the option, subject to specific
country tax and legal requirements, to participate in a program involving the
cancellation of all or part of their options to purchase DuPont common stock or
SARs with respect to DuPont common stock and the issuance by the Company upon
such cancellation of comparable options to acquire Class A Common Stock, or SARs
with respect to Class A Common Stock. Participation in the program will be
deemed a change in the terms of certain awards granted to Conoco employees. As a
result, the Company will incur a non-cash charge to compensation expense, in the
quarter the Offerings are completed, of approximately $100 to 200 after-tax
depending on the market price of DuPont common stock at the time of the
cancellation and issuance and the number of outstanding Conoco employee options
to purchase DuPont common stock canceled.
    
 
     From time to time, the DuPont Board of Directors has approved the adoption
of a worldwide Corporate Sharing Program. Under these programs, a majority of
the Company's employees received a one-time grant to acquire shares of DuPont
common stock at the fair market value at the date of grant. Option terms are
"fixed" and generally are exercisable one year after date of grant and expire 10
years from date of grant. There are no additional shares that may be subject to
option under existing programs.
 
     The Company applies APB Opinion No. 25, "Accounting for Stock Issued to
Employees", and related interpretations in accounting for its stock option
plans. Accordingly, no compensation expense has been recognized for fixed
options.
 
   
     Stock option awards under the DuPont Stock Performance Plan may be granted
to key employees of the Company and may be "fixed" and/or "variable". The
purchase price of shares subject to option is the market price of DuPont stock
at the date of grant. In January 1997, a reload feature was added to the Stock
Performance Plan to accelerate stock ownership by more effectively using stock
options. Participants are eligible for reload options through February 13, 1999
upon the exercise of stock options with the condition that shares received from
the exercise of the original option may not be sold for at least five years.
Reloads are granted at the market price on the reload grant date and have a term
equal to the remaining term of the
    
 
                                      F-19
<PAGE>   153
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
                    (DOLLARS IN MILLIONS, EXCEPT PER SHARE)
 
original option. The number of new options granted under a reload option is
equal to the number of shares required to satisfy the total exercise price of
the original option.
 
     Generally, fixed options are fully exercisable from one to three years
after date of grant and expire 10 years from date of grant. Beginning in 1998,
shares otherwise receivable from the exercise of nonqualified options can be
deferred as stock units for a designated future delivery.
 
     During 1997 variable stock option grants were made to certain senior
management. These options are subject to forfeiture if, within five years from
the date of grant, the market price of DuPont common stock does not achieve a
price of $75 per share for 50 percent of the options and $90 per share for the
remaining 50 percent. At December 31, 1997, none of the outstanding variable
options were exercisable.
 
     For all related DuPont plans, the maximum number of shares that may be
subject to option for any consecutive five-year period is 72 million shares.
Subject to this limit, additional shares that may have been made subject to
options for the years 1995, 1996 and 1997 were 56,770,460, 59,078,926 and
56,842,462, respectively.
 
     Awards for 1997 under the DuPont Stock Performance Plan (granted to key
employees in 1998) consisted of 1,185,276 fixed options to acquire DuPont common
stock at the fair market value ($59.50 per share) on the date of grant. These
options vest over a three-year period and, except for the last six months of the
ten-year option term, are exercisable when the market price of DuPont common
stock exceeds the option grant price by 20 percent.
 
     The following table summarizes activity for fixed and variable options for
the last three years:
 
<TABLE>
<CAPTION>
                                                    FIXED                 VARIABLE
                                            ---------------------   ---------------------
                                             NUMBER     WEIGHTED-    NUMBER     WEIGHTED-
                                               OF        AVERAGE       OF        AVERAGE
                                             SHARES       PRICE      SHARES       PRICE
                                            ---------   ---------   ---------   ---------
<S>                                         <C>         <C>         <C>         <C>
January 1, 1995...........................  4,980,083    $20.80            --
Granted...................................  3,556,392    $28.26            --        --
Exercised.................................    614,269    $18.56            --        --
Forfeited.................................    110,659    $28.08            --        --
                                            ---------    ------     ---------    ------
December 31, 1995.........................  7,811,547    $24.27            --        --
Granted...................................  1,140,780    $39.20            --        --
Exercised.................................  1,781,277    $23.33            --        --
Forfeited.................................     95,330    $26.38            --        --
                                            ---------    ------     ---------    ------
December 31, 1996.........................  7,075,720    $26.88            --        --
Granted...................................  2,761,416    $52.90     1,259,600    $52.50
Exercised.................................    730,383    $23.97            --        --
Forfeited.................................    116,325    $50.44            --        --
                                            ---------    ------     ---------    ------
December 31, 1997.........................  8,990,428    $35.14     1,259,600    $52.50
</TABLE>
 
     Fixed options exercisable at the end of the last three years and the
weighted-average fair value of fixed options granted are as follows:
 
<TABLE>
<CAPTION>
                                                      1995         1996         1997
                                                   ----------   ----------   ----------
<S>                                                <C>          <C>          <C>
Options exercisable at year-end:
  Number of shares...............................   4,377,657    5,934,940    6,229,012
  Weighted-average price.........................  $    21.14   $    24.51   $    27.26
Weighted-average fair value of options granted
  during the year................................  $     5.92   $     9.01   $    12.84
</TABLE>
 
                                      F-20
<PAGE>   154
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
                    (DOLLARS IN MILLIONS, EXCEPT PER SHARE)
 
     The weighted-average fair value of variable options granted during 1997 was
$13.03 per share.
 
     The fair value of options is calculated using the Black-Scholes option
pricing model. Assumptions used were as follows:
 
<TABLE>
<CAPTION>
                                                         1995    1996          1997
                                                         -----   -----   ----------------
                                                         FIXED   FIXED   FIXED   VARIABLE
                                                         -----   -----   -----   --------
<S>                                                      <C>     <C>     <C>     <C>
Dividend yield.........................................   3.4%    2.6%    2.2%      2.2%
Volatility.............................................  20.6%   21.0%   18.6%     18.6%
Risk-free interest rate................................   7.6%    5.4%    6.4%      6.4%
Expected life (years)..................................   4.5     6.0     5.6       5.7
</TABLE>
 
     The following table summarizes information concerning currently outstanding
and exercisable fixed options. For total variable options outstanding at
December 31, 1997, the weighted-average remaining contractual life was 9.1
years.
 
<TABLE>
<CAPTION>
                                                   EXERCISE        EXERCISE        EXERCISE
                                                     PRICE           PRICE           PRICE
               DECEMBER 31, 1997                 $13.17-$19.63   $22.63-$33.88   $35.00-$55.50
               -----------------                 -------------   -------------   -------------
<S>                                              <C>             <C>             <C>
Options outstanding............................    1,140,519       3,977,927       3,871,982
Weighted-average remaining contractual life
  (years)......................................          2.6             6.2             8.9
Weighted-average price.........................   $    18.37      $    26.49      $    48.38
Options exercisable............................    1,140,519       3,977,927       1,110,566
Weighted-average price.........................   $    18.37      $    26.49      $    39.19
</TABLE>
 
     As reported on the New York Stock Exchange, the market price range of
DuPont common stock for the year 1997 was $46 3/8 to $69 3/4 per share and the
closing price on December 31, 1997 was $60 1/16 per share.
 
     Under the Conoco Unit Option Plan, key salaried employees in certain grade
levels who show early evidence of ability to assume significant responsibility
and leadership are offered stock appreciation rights. Annual grants under the
plan are granted to approximately 20 percent of eligible employees who are
awarded appreciation rights on theoretical DuPont stock valued at approximately
40 percent of the employee's annual base pay. These unit options, exercisable
only in cash, have a ten-year life with twenty percent vesting each of the first
five years. At December 31, 1996 and 1997, unit options outstanding were 954,374
and 908,532, respectively. At these same dates, related liability provisions
totaled $18 and $27, respectively. The maximum number of unit options allowed to
be outstanding under the plan is 6,150,000.
 
     Compensation expense recognized in income for stock-based employee
compensation awards was $8, $13 and $26 for 1995, 1996 and 1997, respectively.
 
     Statement of Financial Accounting Standards (SFAS) No. 123, "Accounting for
Stock-Based Compensation", was issued in 1995. The Company has elected not to
adopt the optional recognition provisions of SFAS No. 123. If the Company had
adopted these recognition provisions, net income would have been reduced by $13,
$6 and $28 for 1995, 1996 and 1997, respectively.
 
   
     Awards under the Variable Compensation Plan may be granted in stock and/or
cash to employees who have contributed most in a general way to the Company's
success, consideration being given to ability to succeed to more important
managerial responsibility. Overall amounts are dependent on financial
performance of DuPont and Conoco and other factors, and are subject to maximum
limits as defined by the plan. Amounts charged against earnings in anticipation
of awards to be made later were $24 in 1995, $38 in 1996 and $38 in 1997. Awards
made for plan years 1995, 1996 and 1997 were $26, $38 and $45, respectively. In
accordance with the terms of the Variable Compensation Plan and similar plans of
subsidiaries, 154,918 shares of common stock are awaiting delivery from awards
for 1997 and prior years.
    
 
                                      F-21
<PAGE>   155
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
                    (DOLLARS IN MILLIONS, EXCEPT PER SHARE)
 
   
     Awards under the separate Conoco Challenge Program may be granted in cash
to employees not covered by the Variable Compensation Plan. This plan provides
awards based on meeting financial goals and upholding Conoco's core values.
Overall amounts are dependent on Company earnings and cash provided by
operations and are subject to maximum limits as defined by the plan. Amounts
charged against earnings in anticipation of awards to be made later were $12 in
1995, $47 in 1996 and $49 in 1997. Awards made for plan years 1995, 1996 and
1997 were $20, $47 and $47, respectively.
    
 
21. INVESTMENT ACTIVITIES
 
     Purchases of property, plant and equipment in 1997 include $929 for
upstream natural gas properties in South Texas (see Supplemental Petroleum
Data).
 
     Proceeds from sales of assets in 1997 includes $272 from the sale of
certain upstream North Sea properties.
 
22. OTHER POSTRETIREMENT BENEFITS
 
   
     Conoco and certain subsidiaries provide medical and life insurance benefits
to retirees and survivors. The associated plans, principally health, are
unfunded, and approved claims are paid from Company funds. Under the terms of
these plans, the Company reserves the right to change, modify or discontinue the
plans.
    
 
     Net postretirement benefits cost includes the following components:
 
<TABLE>
<CAPTION>
                                                              1995   1996   1997
                                                              ----   ----   ----
<S>                                                           <C>    <C>    <C>
Service cost................................................  $ 5    $ 7    $ 6
Interest cost...............................................   18     16     18
Amortization of net gains and prior service credit..........   (7)    (5)    (5)
                                                              ---    ---    ---
Net postretirement benefits cost............................  $16    $18    $19
</TABLE>
 
     The following provides a reconciliation of the accumulated postretirement
benefit obligation for these plans to the liabilities reflected in the Combined
Balance Sheet (see Notes 15 and 17):
 
<TABLE>
<CAPTION>
                                                               DECEMBER 31
                                                              -------------
                                                              1996    1997
                                                              -----   -----
<S>                                                           <C>     <C>
Accumulated postretirement benefit obligation for:
 
  Retirees and survivors....................................  $(152)  $(194)
  Fully eligible employees..................................     (5)     (6)
  Other employees...........................................    (85)   (101)
                                                              -----   -----
                                                               (242)   (301)
Unrecognized net loss (gain)................................    (41)     14
Unrecognized prior service credit...........................    (60)    (55)
                                                              -----   -----
Accrued postretirement benefits cost........................  $(343)  $(342)
</TABLE>
 
<TABLE>
<CAPTION>
                                                              DECEMBER 31
                                                              -----------
                                                              1996   1997
                                                              ----   ----
<S>                                                           <C>    <C>
FINANCIAL ASSUMPTIONS
 
Discount rate...............................................  7.75%  7.00%
Long-term rate of compensation increase.....................  5.00%  5.00%
Health care escalation rate.................................  4.50%  4.50%
</TABLE>
 
                                      F-22
<PAGE>   156
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
                    (DOLLARS IN MILLIONS, EXCEPT PER SHARE)
 
     Conoco has communicated to plan participants that any increase in the
annual health care escalation rate above 4.5 percent will be borne by the
participants and, therefore, result in no increase to the accumulated
postretirement benefit obligation or the other postretirement benefits cost.
 
23. PENSIONS
 
     The Company participates in the DuPont U.S. defined benefit plan which
covers substantially all U.S. employees and has separate defined benefit plans
covering certain U.S. and non-U.S. employees. The benefits for these plans are
based primarily on years of service and employees' pay near retirement. The
Company's funding policy is consistent with the funding requirements of federal
law and regulations.
 
     With respect to the DuPont U.S. defined benefit pension plan, the Company
and DuPont agreed upon an amount of approximately $820 at the date of the
Offerings that will eventually be transferred to a separate trust for the
Company's pension plan. This amount, adjusted for benefit payments and
investment return from the date of the Offerings, will be transferred to the
Company within six months following the date which DuPont owns neither 80
percent of the voting power nor 80 percent of the economic value of the Common
Stock, assuming certain conditions are satisfied. The Company allocated the
pension obligations based on the Company's individual employees covered and
allocated the unrecognized prior service cost and unrecognized net gain in
proportion to the Company's projected benefit obligation to the total projected
benefit obligation of the DuPont plan. The projected benefit obligation
approximates $644 and $723 at December 31, 1996 and 1997, respectively, and the
prepaid pension asset is $79 and $71 at December 31, 1996 and 1997,
respectively. The net pension cost components disclosed in the table below
include the net periodic pension cost based on the allocations described above.
 
     Pension coverage for employees of the Company's non-U.S. subsidiaries is
provided, to the extent deemed appropriate, through separate plans. Obligations
under such plans are systematically provided for by depositing funds with
trustees, under insurance policies or by book reserves.
 
     Net pension cost/(credit) for defined benefit plans includes the following
components:
 
<TABLE>
<CAPTION>
                                                   1995           1996           1997
                                               ------------   ------------   ------------
<S>                                            <C>     <C>    <C>     <C>    <C>     <C>
Service cost -- benefits earned during the
  period.....................................          $ 51           $ 55           $ 60
Interest cost on projected benefit
  obligation.................................            71             76             88
Return on assets
  Actual (gain)..............................  $(196)         $(134)         $(192)
  Deferred gain..............................    122    (74)     43    (91)     94    (98)
                                               -----          -----          -----
Amortization of net gains and prior service
  cost.......................................            (4)            (3)             3
                                                       ----           ----           ----
Net pension cost.............................          $ 44           $ 37           $ 53
                                                       ====           ====           ====
</TABLE>
 
                                      F-23
<PAGE>   157
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
                    (DOLLARS IN MILLIONS, EXCEPT PER SHARE)
 
     The funded status of these plans (excluding the DuPont United States
defined benefit plan) was as follows:
 
<TABLE>
<CAPTION>
                                                              ACCUMULATED BENEFIT
                                                                EXCEEDING ASSETS
                                                                  DECEMBER 31
                                                              --------------------
                                                               1996         1997
                                                              -------      -------
<S>                                                           <C>          <C>
Actuarial present value of:
  Vested benefit obligation.................................   $(485)       $(616)
                                                               -----        -----
  Accumulated benefit obligation............................   $(489)       $(616)
                                                               =====        =====
  Projected benefit obligation..............................   $(533)       $(682)
Plan assets at fair value...................................     323          386
                                                               -----        -----
Excess of assets over projected benefit obligation..........    (210)        (296)
Unrecognized net (gain) loss*...............................      29          109
Unrecognized prior service cost.............................     129          121
Additional minimum liability................................    (113)        (164)
                                                               -----        -----
Accrued pension liability (see Note 17).....................   $(165)       $(230)
                                                               =====        =====
- ---------------
* Includes the unamortized balance of unrecognized net
  (gain) at January 1, 1985, the initial application date of
  Statement of Financial Accounting Standards No. 87,
  "Employers' Accounting for Pensions"......................   $ (19)       $ (17)
</TABLE>
 
<TABLE>
<CAPTION>
                                                               DECEMBER 31
                                                              --------------
               UNITED STATES PLAN ASSUMPTIONS                 1996      1997
               ------------------------------                 ----      ----
<S>                                                           <C>       <C>
Discount rate...............................................  7.75%     7.00%
Long-term rate of compensation increase.....................  5.00%     5.00%
Long-term rate of return on plan assets.....................  9.00%     9.00%
</TABLE>
 
     For non-U.S. plans, similar economic assumptions were used. At December 31,
1997, U.S. plan assets consisted principally of common stocks, including 151,611
shares of DuPont.
 
24. FINANCIAL INSTRUMENTS AND OTHER RISK MANAGEMENT ACTIVITIES
 
     Conoco operates in the worldwide crude oil, refined product, natural gas,
natural gas liquids and electric power markets and is exposed to fluctuations in
hydrocarbon prices, foreign currency rates, and interest rates that can affect
the revenues and cost of operating, investing and financing. Conoco's management
has used and intends to use financial and commodity-based derivative contracts
to reduce the risk in overall earnings and cash flow when the benefits provided
are anticipated to more than offset the risk management costs involved.
 
     The Company has established a Financial Risk Management Policy Framework
that provides guidelines for entering into contractual arrangements
(derivatives) to manage the Company's commodity price, foreign currency rate,
and interest rate risks. The Conoco Risk Management Committee has ongoing
responsibility for the content of this policy and has principal oversight
responsibility to ensure the Company is in compliance with the policy and that
procedures and controls are in place for the use of commodity, foreign currency
and interest rate instruments. These procedures clearly establish derivative
control and valuation processes, routine monitoring and reporting requirements,
and counterparty credit approval procedures. Additionally, the Company's
internal audit group conducts routine reviews of these risk management
activities to assess the adequacy of internal controls. The audit results are
reviewed by the Conoco Risk Management Committee and by line management.
 
     The counterparties to these contractual arrangements are limited to major
financial institutions and other established companies in the petroleum
industry. Although the Company is exposed to credit loss in the event of
nonperformance by these counterparties, this exposure is managed through credit
approvals, limits and
                                      F-24
<PAGE>   158
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
                    (DOLLARS IN MILLIONS, EXCEPT PER SHARE)
 
monitoring procedures and limits to the period over which unpaid balances are
allowed to accumulate. The Company has not experienced nonperformance by
counterparties to these contracts and no material loss would be expected from
any such nonperformance.
 
COMMODITY PRICE RISK
 
     The Company enters into energy-related futures, forwards, swaps and options
in various markets to balance its physical systems, to meet customer needs and
to manage its exposure to price fluctuations on anticipated crude oil, natural
gas, refined product and electric power transactions.
 
     These instruments provide a natural extension of the underlying cash market
and are used to physically acquire a portion of supply requirements as well as
to manage pricing of near-term physical requirements. The commodity futures
market has underlying principles of increased liquidity and longer trading
periods than the cash market and is one method of managing price risk in the
energy business.
 
     From time to time, management may use derivatives to establish longer-term
positions to hedge the price risk for the Company's equity crude oil and natural
gas production as well as refinery margins.
 
     Under the Company's policy, hedging includes only those transactions that
offset physical positions and reduce overall Company exposure to prevailing
market price risk. Trading is defined as any transaction that does not meet the
definition of hedging. After-tax gain/loss from risk trading has not been
material.
 
FOREIGN CURRENCY RISK
 
     Conoco has foreign currency exchange rate risk resulting from operations in
over 40 countries around the world. Effective January 1, 1996, the Company
determined that the local currency should be the functional currency for its
integrated Western European petroleum operations. At this time, the Company does
not intend to comprehensively hedge its exposure to currency rate changes,
although it may choose to selectively hedge exposures to foreign currency rate
risk resulting from transactions in currencies that are not the functional
currency. Examples include firm commitments for capital projects, certain local
currency tax payments and cash returns from net investments in foreign
affiliates to be remitted within the coming year.
 
     At December 31, 1997, the Company had open forward exchange contracts
designated as a hedge of firm foreign currency commitments. The notional amount
of these contracts was $50 and the estimated fair value was $38. The Company had
no open forward exchange contracts at December 31, 1996.
 
INTEREST RATE RISK
 
     Prior to this planned offering, the Company had no material interest rate
risk to manage. Subsequent to this offering, however, the Company would intend
to manage any resultant significant interest rate exposure by using a
combination of financial derivative instruments as part of a program to manage
the fixed and floating interest rate mix of the total debt portfolio and related
overall cost of borrowing.
 
FAIR VALUES OF FINANCIAL INSTRUMENTS
 
     The carrying values of most financial instruments are based on historical
costs. The carrying values of marketable securities, receivables, payables and
short-term obligations approximate their fair value because of their short
maturity. Long-term receivables from and long-term borrowings due to related
parties approximate fair value because associated interest rates are market
based. Excluding amounts due related parties, the estimated fair value of other
long-term borrowings outstanding at December 31, 1996 and 1997 of $101 and $106,
respectively, was $103 and $108, respectively. These estimates were based on
quoted market prices for the same or similar issues, or the current rates
offered to the Company for issues with the same remaining maturities.
 
                                      F-25
<PAGE>   159
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
                    (DOLLARS IN MILLIONS, EXCEPT PER SHARE)
 
SUMMARY OF OUTSTANDING DERIVATIVE FINANCIAL INSTRUMENTS
 
     Set forth below is a summary of the fair values, carrying amounts and
notional values of outstanding commodity financial instruments at December 31,
1996 and 1997.
 
     Notional amounts represent the face amount of the contractual arrangements
and are not a measure of market or credit exposure. The fair value of swaps and
other over-the-counter instruments are estimated based on quoted market prices
of comparable contracts and approximate the gain or (loss) that would have been
realized if the contracts had been closed out at balance sheet date. Carrying
amounts represent the receivable (payable) recorded in the Combined Balance
Sheet.
 
<TABLE>
<CAPTION>
                                                              FAIR    CARRYING   NOTIONAL
                   COMMODITY DERIVATIVES                      VALUE    AMOUNT     VALUE
                   ---------------------                      -----   --------   --------
<S>                                                           <C>     <C>        <C>
December 31, 1996:
  Hedging...................................................   $ 2      $ 5       $  273
  Trading...................................................     1       --          291
December 31, 1997:
  Hedging...................................................   $10      $12       $1,037
  Trading...................................................    (2)      (1)       1,089
</TABLE>
 
     Estimated fair values for hedging instruments only represent the value of
the hedge component of the transactions and, thus, are not indicative of the
fair value of the Company's overall hedged position.
 
25. COMMITMENTS AND CONTINGENT LIABILITIES
 
     The Company uses various leased facilities and equipment in its operations.
Future minimum lease payments under noncancelable operating leases are $178,
$156, $119, $106 and $97 for the years 1998, 1999, 2000, 2001 and 2002,
respectively, and $582 for subsequent years, and are not reduced by
noncancelable minimum sublease rentals due in the future in the amount of $120.
Rental expense under operating leases was $124 in 1995, $118 in 1996 and $132 in
1997.
 
     The Company has various purchase commitments for materials, supplies and
items of permanent investment incident to the ordinary conduct of business. In
the aggregate, such commitments are not at prices in excess of current market.
In addition, at December 31, 1997, the Company has obligations to purchase, over
periods up to twenty-one years, natural gas at prices that were in excess of
year-end 1997 market prices. No material annual loss is expected from these
long-term commitments.
 
   
     The Company is subject to various lawsuits and claims involving a variety
of matters including, along with other oil companies, actions challenging oil
and gas royalty, severance tax payments and other payments, including claims
based on posted prices, and claims for damages resulting from leaking
underground storage tanks. In general, the effect on future financial results is
not subject to reasonable estimation because considerable uncertainty exists.
The Company believes the ultimate liabilities resulting from such lawsuits and
claims may be material to results of operations in the period in which they are
recognized but will not materially affect the combined financial position of the
Company. In addition to the litigation settlements referenced in Note 26, during
the second quarter of 1998 the Company recorded non-recurring after-tax charges
of $28 for anticipated costs to resolve various litigation.
    
 
     The Company is also subject to contingencies pursuant to environmental laws
and regulations that in the future may require the Company to take further
action to correct the effects on the environment of prior disposal practices or
releases of petroleum substances by the Company or other parties. The Company
has accrued for certain environmental remediation activities consistent with the
policy set forth in Note 2. At December 31, 1996 and 1997, such accrual amounted
to $152 and $144, respectively, and, in management's opinion, was appropriate
based on existing facts and circumstances. Under adverse changes in
circumstances,
 
                                      F-26
<PAGE>   160
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
                    (DOLLARS IN MILLIONS, EXCEPT PER SHARE)
 
potential liability may exceed amounts accrued. In the event future monitoring
and remediation expenditures are in excess of amounts accrued, they may be
significant to results of operations in the period recognized but management
does not anticipate they will have a material adverse effect on the combined
financial position of the Company.
 
     The Company has indirectly guaranteed various debt obligations under
agreements with certain affiliated and other companies to provide specified
minimum revenues from shipments or purchases of products. These indirect
guarantees totaled $19 at December 31, 1996 and 1997. The Company, along with
certain European DuPont subsidiaries, also participates in a multiparty account
banking agreement, which provides for the indirect guarantee of bank account
overdrafts of certain European DuPont subsidiaries. Management believes the
exposure under this agreement is not material and expects to terminate the
agreement prior to completion of the Offerings. In addition, the Company or
DuPont, on behalf of the Company, had directly guaranteed obligations of certain
affiliated companies and others. These guarantees totaled $663 and $1,131 at
December 31, 1996 and 1997, respectively. The increase during 1997 is primarily
related to financing associated with the Petrozuata heavy oil venture in
Venezuela. No material loss is anticipated by reason of such agreements and
guarantees.
 
     The Company's operations, particularly oil and gas exploration and
production, can be affected by changing economic, regulatory and political
environments in the various countries, including the United States, in which it
operates. In certain locations, host governments have imposed restrictions,
controls and taxes, and in others, political conditions have existed that may
threaten the safety of employees and the Company's continued presence in those
countries. Internal unrest or strained relations between a host government and
the Company or other governments may affect the Company's operations. Those
developments have, at times, significantly affected the Company's operations and
related results and are carefully considered by management when evaluating the
level of current and future activity in such countries.
 
   
     Areas in which the Company has significant operations include the United
States, the United Kingdom, Norway, Germany, Venezuela, the United Arab
Emirates, Indonesia, Russia, Canada, the Czech Republic, Malaysia and Nigeria.
    
 
26. INDUSTRY SEGMENT AND GEOGRAPHIC INFORMATION
 
     The Company has two principal business segments. The Upstream segment
explores for, develops, produces and markets crude oil and natural gas, and
processes natural gas to recover and market higher-value liquids. The Downstream
segment refines, markets, transports and trades crude oil and petroleum
products. Corporate and Other includes general corporate expenses, financing
costs and other nonoperating items, and results for electric power and
related-party insurance operations. The Company sells its products worldwide;
however, about 55 percent and 41 percent of sales are made in the United States
and Europe, respectively. Major products include crude oil, natural gas and
refined products that are sold primarily in the energy and transportation
markets. The Company's sales are not materially dependent on a single customer
or small group
 
                                      F-27
<PAGE>   161
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
                    (DOLLARS IN MILLIONS, EXCEPT PER SHARE)
 
of customers. Transfers between segments and geographic areas are on the basis
of estimated market values. Corporate assets include cash and cash equivalents.
 
<TABLE>
<CAPTION>
                                                                              CORPORATE
                SEGMENT INFORMATION                   UPSTREAM   DOWNSTREAM   AND OTHER   COMBINED
                -------------------                   --------   ----------   ---------   --------
<S>                                                   <C>        <C>          <C>         <C>
1995
Sales and Other Operating Revenues(1)(2)............   $3,270     $17,038      $   20     $20,328
Transfers Between Segments..........................      910          92          --          --
                                                       ------     -------      ------     -------
          Total Revenues............................   $4,180     $17,130      $   20     $20,328
                                                       ======     =======      ======     =======
Operating Profit....................................   $1,121     $   319      $ (110)    $ 1,330
Equity in Earnings of Affiliates....................       (5)         27          --          22
Corporate Nonoperating Items:
  Interest and Debt Expense.........................                              (74)        (74)
  Interest Income (net of misc. interest expense)...                              118         118
  Other.............................................                              (47)        (47)
Provision for Income Taxes..........................     (624)       (113)        (37)       (774)
                                                       ------     -------      ------     -------
  Net Income (Loss)(3)..............................   $  492     $   233      $ (150)    $   575
                                                       ======     =======      ======     =======
Assets at December 31:
  Identifiable Assets...............................   $7,059     $ 5,242      $1,473     $13,774
  Investment in Affiliates..........................      171         284          --         455
                                                       ------     -------      ------     -------
          Total.....................................   $7,230     $ 5,526      $1,473     $14,229
                                                       ======     =======      ======     =======
Depreciation, Depletion and Amortization(4).........   $  812     $   286      $   --     $ 1,098
Capital Expenditures and Investments(5).............   $1,224     $   613      $   --     $ 1,837
1996
Sales and Other Operating Revenues(1)(2)............   $4,726     $19,425      $   79     $24,230
Transfers Between Segments..........................    1,159         122          --          --
                                                       ------     -------      ------     -------
          Total Revenues............................   $5,885     $19,547      $   79     $24,230
                                                       ======     =======      ======     =======
Operating Profit....................................   $1,559     $   446      $ (118)    $ 1,887
Equity in Earnings of Affiliates....................      (30)          5          --         (25)
Corporate Nonoperating Items:
  Interest and Debt Expense.........................                              (74)        (74)
  Interest Income (net of misc. interest expense)...                              124         124
  Other.............................................                              (11)        (11)
Provision for Income Taxes..........................     (848)       (162)        (28)     (1,038)
                                                       ------     -------      ------     -------
  Net Income (Loss)(6)..............................   $  681     $   289      $ (107)    $   863
                                                       ======     =======      ======     =======
Assets at December 31:
  Identifiable Assets...............................   $7,486     $ 5,360      $1,677     $14,523
  Investment in Affiliates..........................      234         469          --         703
                                                       ------     -------      ------     -------
          Total.....................................   $7,720     $ 5,829      $1,677     $15,226
                                                       ======     =======      ======     =======
Depreciation, Depletion and Amortization(4).........   $  822     $   293      $   --     $ 1,115
Capital Expenditures and Investments(5).............   $1,264     $   680      $   --     $ 1,944
</TABLE>
 
                                      F-28
<PAGE>   162
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
                    (DOLLARS IN MILLIONS, EXCEPT PER SHARE)
 
<TABLE>
<CAPTION>
                                                                              CORPORATE
                SEGMENT INFORMATION                   UPSTREAM   DOWNSTREAM   AND OTHER   COMBINED
                -------------------                   --------   ----------   ---------   --------
<S>                                                   <C>        <C>          <C>         <C>
1997
Sales and Other Operating Revenues(1)(2)............   $5,254     $20,033      $  509     $25,796
Transfers Between Segments..........................    1,221         108          --          --
                                                       ------     -------      ------     -------
          Total Revenues............................   $6,475     $20,141      $  509     $25,796
                                                       ======     =======      ======     =======
Operating Profit....................................   $1,663     $   472      $ (132)    $ 2,003
Equity in Earnings of Affiliates....................       11          29          --          40
Corporate Nonoperating Items:
  Interest and Debt Expense.........................                              (36)        (36)
  Interest Income (net of misc. interest expense)...                               77          77
  Other.............................................                               23          23
Provision for Income Taxes..........................     (790)       (194)        (26)     (1,010)
                                                       ------     -------      ------     -------
  Net Income (Loss)(7)..............................   $  884     $   307      $  (94)    $ 1,097
                                                       ======     =======      ======     =======
Assets at December 31:
  Identifiable Assets...............................   $8,538     $ 5,247      $2,192     $15,977
  Investment in Affiliates..........................      411         651          23       1,085
                                                       ------     -------      ------     -------
          Total.....................................   $8,949     $ 5,898      $2,215     $17,062
                                                       ======     =======      ======     =======
Depreciation, Depletion and Amortization(4).........   $  892     $   333      $   --     $ 1,225
Capital Expenditures and Investments(5).............   $2,533     $   558      $   23     $ 3,114
</TABLE>
 
- ---------------
 
(1) Sales exceeding 10 percent of combined sales and other operating revenues:
 
<TABLE>
<CAPTION>
                                                           1995      1996      1997
                                                          -------   -------   -------
<S>                                                       <C>       <C>       <C>
Refined products........................................  $14,444   $15,953   $15,829
Crude oil...............................................    3,062     4,286     4,879
Natural gas.............................................    1,494     2,378     2,971
</TABLE>
 
(2) Includes sales of purchased products substantially at cost:
 
<TABLE>
<CAPTION>
                                                              1995     1996     1997
                                                             ------   ------   ------
<S>                                                          <C>      <C>      <C>
Buy/sell supply transactions settled in cash:
  Crude oil................................................  $1,845   $2,820   $3,566
  Refined products.........................................     454      729      683
Natural gas resales........................................     192      560      773
Electric power resales.....................................      --       58      487
</TABLE>
 
(3) Includes $45 charge ($39 Upstream/$6 Downstream) for write-down of certain
    North American and European assets associated with the adoption of new
    accounting standards involving the impairment of long-lived assets (SFAS No.
    121).
 
(4) Includes impairment of unproved properties.
 
(5) Includes investments in affiliates.
 
(6) Includes charges of $63 for write-down of investment in an Upstream European
    natural gas marketing joint venture and $22 ($11 Upstream/$11 Downstream),
    principally for employee separation costs in the United States;
    substantially offset by Downstream benefits of $44 related to environmental
    insurance recoveries and $19 from sale of Ireland operations, and by
    Upstream gain of $16 from sale of U.S. producing properties.
 
(7) Includes combined gain of $240 from sale of Upstream properties in the North
    Sea and the United States, and $30 benefit ($19 Upstream/$11 Downstream)
    from reduction in foreign tax rate; partly offset
 
                                      F-29
<PAGE>   163
             NOTES TO COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
                    (DOLLARS IN MILLIONS, EXCEPT PER SHARE)
 
    by Upstream charges of $112 for impairment of nonrevenue producing
    properties, and Downstream charges of $55 for write-down of an office
    building held for sale and $23 for litigation settlements.
 
<TABLE>
<CAPTION>
                                           UNITED               OTHER       CORPORATE/
         GEOGRAPHIC INFORMATION            STATES    EUROPE    REGIONS     NONOPERATING   COMBINED
         ----------------------            -------   -------   -------     ------------   --------
<S>                                        <C>       <C>       <C>         <C>            <C>
1995
Sales and Other Operating Revenues.......  $10,094   $ 9,490   $  744         $   --      $20,328
Transfers Between Geographical Areas.....        2         1      120             --           --
                                           -------   -------   ------         ------      -------
          Total..........................  $10,096   $ 9,491   $  864         $   --      $20,328
                                           =======   =======   ======         ======      =======
Net Income...............................  $   335   $   309   $   12         $  (81)     $   575
Assets at December 31:
  Identifiable Assets....................  $ 5,405   $ 6,285   $  611         $1,473      $13,774
  Investment in Affiliates...............      213       166       76             --          455
                                           -------   -------   ------         ------      -------
          Total..........................  $ 5,618   $ 6,451   $  687         $1,473      $14,229
                                           =======   =======   ======         ======      =======
1996
Sales and Other Operating Revenues.......  $13,386   $10,049   $  795         $   --      $24,230
Transfers Between Geographical Areas.....        1        --      151             --           --
                                           -------   -------   ------         ------      -------
          Total..........................  $13,387   $10,049   $  946         $   --      $24,230
                                           =======   =======   ======         ======      =======
Net Income...............................  $   447   $   427   $   22         $  (33)     $   863
Assets at December 31:
  Identifiable Assets....................  $ 5,398   $ 6,692   $  756         $1,677      $14,523
  Investment in Affiliates...............      259       241      203             --          703
                                           -------   -------   ------         ------      -------
          Total..........................  $ 5,657   $ 6,933   $  959         $1,677      $15,226
                                           =======   =======   ======         ======      =======
1997
Sales and Other Operating Revenues.......  $15,229   $ 9,585   $  982         $   --      $25,796
Transfers Between Geographical Areas.....        5        --      191             --           --
                                           -------   -------   ------         ------      -------
          Total..........................  $15,234   $ 9,585   $1,173         $   --      $25,796
                                           =======   =======   ======         ======      =======
Net Income...............................  $   612   $   647   $ (150)(1)     $  (12)     $ 1,097
Assets at December 31:
  Identifiable Assets....................  $ 6,269   $ 6,757   $  759         $2,192      $15,977
  Investment in Affiliates...............      381       276      428             --        1,085
                                           -------   -------   ------         ------      -------
          Total..........................  $ 6,650   $ 7,033   $1,187         $2,192      $17,062
                                           =======   =======   ======         ======      =======
</TABLE>
 
- ---------------
 
(1) Includes charges of $112 for impairment of nonrevenue producing properties.
 
27. OTHER FINANCIAL INFORMATION
 
     Research and development expenses were $36, $41 and $44 for the years 1995,
1996 and 1997, respectively.
 
     Maintenance and repair expenses were $356, $337 and $372 for the years
1995, 1996 and 1997, respectively.
 
28. SUBSEQUENT EVENTS
 
     In July 1998, a dividend of $7,500 was paid by the Company in the form of a
promissory note to all shareholders of record as of July 20, 1998. The
promissory note is due January 2, 2000 and bears interest at an annual interest
rate of 6.0125 percent.
 
                                      F-30
<PAGE>   164
 
                          SUPPLEMENTAL PETROLEUM DATA
                                  (UNAUDITED)
                             (DOLLARS IN MILLIONS)
 
OIL AND GAS PRODUCING ACTIVITIES
 
     Supplemental Petroleum Data disclosures are presented in accordance with
the provisions of Statement of Financial Accounting Standards No. 69,
"Disclosures About Oil and Gas Producing Activities."
 
     Accordingly, volumes of reserves and production exclude royalty interests
of others, and royalty payments are reflected as reductions in revenues.
 
RESULTS OF OPERATIONS FOR OIL AND GAS PRODUCING ACTIVITIES
 
<TABLE>
<CAPTION>
                                  TOTAL WORLDWIDE            UNITED STATES               EUROPE                OTHER REGIONS
                              ------------------------   ---------------------   -----------------------   ---------------------
                               1995     1996     1997    1995    1996    1997    1995     1996     1997    1995    1996    1997
                              ------   ------   ------   -----   -----   -----   -----   ------   ------   -----   -----   -----
<S>                           <C>      <C>      <C>      <C>     <C>     <C>     <C>     <C>      <C>      <C>     <C>     <C>
COMBINED COMPANIES
Revenues:
  Sales to unaffiliated
    customers...............  $1,863   $2,479   $2,603   $ 443   $ 621   $ 787   $ 817   $1,204   $1,181   $ 603   $ 654   $ 635
  Transfers to other company
    operations..............     862      927      849     386     363     272     477      566      577      (1)     (2)     --
Exploration, including dry
  hole costs................    (275)    (374)    (412)    (80)   (131)   (101)   (134)    (156)    (131)    (61)    (87)   (180)
Production..................    (727)    (755)    (854)   (287)   (297)   (320)   (347)    (372)    (409)    (93)    (86)   (125)
Depreciation, depletion,
  amortization and valuation
  provisions................    (727)    (800)    (872)   (290)   (302)   (279)   (362)    (443)    (419)    (75)    (55)   (174)(1)
Other(2)....................      82       69      321      48      48     106      31       (1)     215       3      22      --
Income Taxes................    (626)    (912)    (847)    (24)    (47)   (109)   (242)    (436)    (393)   (360)   (429)   (345)
                              ------   ------   ------   -----   -----   -----   -----   ------   ------   -----   -----   -----
  Results of operations.....     452      634      788     196     255     356     240      362      621      16      17    (189)
                              ------   ------   ------   -----   -----   -----   -----   ------   ------   -----   -----   -----
EQUITY AFFILIATES
Results of operations.......      12       32       30      --       7       7      12       25       29      --      --      (6)
                              ------   ------   ------   -----   -----   -----   -----   ------   ------   -----   -----   -----
        Total...............  $  464   $  666   $  818   $ 196   $ 262   $ 363   $ 252   $  387   $  650   $  16   $  17   $(195)
                              ======   ======   ======   =====   =====   =====   =====   ======   ======   =====   =====   =====
</TABLE>
 
- ---------------
 
(1) Includes charges of $112 for impairment of nonrevenue producing properties.
 
(2) Includes gain/(loss) on disposal of fixed assets and other miscellaneous
    revenues and expenses.
 
                                      F-31
<PAGE>   165
 
                          SUPPLEMENTAL PETROLEUM DATA
                                  (UNAUDITED)
                             (DOLLARS IN MILLIONS)
 
COSTS INCURRED IN OIL AND GAS PROPERTY ACQUISITION, EXPLORATION AND DEVELOPMENT
ACTIVITIES (1)
 
<TABLE>
<CAPTION>
                                            TOTAL WORLDWIDE           UNITED STATES             EUROPE           OTHER REGIONS
                                        ------------------------   --------------------   ------------------   ------------------
                                         1995     1996     1997    1995   1996    1997    1995   1996   1997   1995   1996   1997
                                        ------   ------   ------   ----   ----   ------   ----   ----   ----   ----   ----   ----
<S>                                     <C>      <C>      <C>      <C>    <C>    <C>      <C>    <C>    <C>    <C>    <C>    <C>
COMBINED COMPANIES
Property acquisitions
  Proved(2)...........................  $   96   $   21   $  152   $ 95   $ 14   $  148   $ --   $ --   $ --   $  1   $  7   $  4
  Unproved............................      58       42      831     29     41      723(3)    1    --     95     28      1     13
Exploration...........................     358      445      450    128    144      107    159    169    135     71    132    208
Development...........................     745      828      921    242    203      289    463    543    568     40     82     64
                                        ------   ------   ------   ----   ----   ------   ----   ----   ----   ----   ----   ----
        Total combined companies......   1,257    1,336    2,354    494    402    1,267    623    712    798    140    222    289
                                        ------   ------   ------   ----   ----   ------   ----   ----   ----   ----   ----   ----
EQUITY AFFILIATES
Development...........................      14       19      263      4      5       12     10     14      2     --     --    249(4)
                                        ------   ------   ------   ----   ----   ------   ----   ----   ----   ----   ----   ----
        Total equity affiliates.......      14       19      263      4      5       12     10     14      2     --     --    249
                                        ------   ------   ------   ----   ----   ------   ----   ----   ----   ----   ----   ----
        Total.........................  $1,271   $1,355   $2,617   $498   $407   $1,279   $633   $726   $800   $140   $222   $538
                                        ======   ======   ======   ====   ====   ======   ====   ====   ====   ====   ====   ====
</TABLE>
 
- ---------------
 
(1) These data comprise all costs incurred in the activities shown, whether
    capitalized or charged to expense at the time they were incurred.
 
(2) Does not include properties acquired through property exchanges.
 
(3) Includes acquisition costs associated with gas reserves acquired in the
    South Texas Lobo trend.
 
(4) Includes Conoco's equity share of the Petrozuata heavy oil venture in
    Venezuela.
 
CAPITALIZED COSTS RELATING TO OIL AND GAS PRODUCING ACTIVITIES
<TABLE>
<CAPTION>
                                  TOTAL WORLDWIDE              UNITED STATES                  EUROPE
                            ---------------------------   ------------------------   ------------------------
       DECEMBER 31           1995      1996      1997      1995     1996     1997     1995     1996     1997
       -----------          -------   -------   -------   ------   ------   ------   ------   ------   ------
<S>                         <C>       <C>       <C>       <C>      <C>      <C>      <C>      <C>      <C>
COMBINED COMPANIES
Gross costs:
  Proved properties.......  $11,023   $11,914   $12,420   $4,440   $4,255   $4,676   $5,220   $6,268   $6,276
  Unproved properties.....      883       913     1,491      251      262      774(1)    439     444      432
Accumulated depreciation,
  depletion, amortization
  and valuation
  allowances:
  Proved properties.......    6,290     6,729     6,940    2,822    2,739    2,836    2,425    2,947    3,001
  Unproved properties.....      156       157       261       76       77       71        7        7        7
                            -------   -------   -------   ------   ------   ------   ------   ------   ------
        Total net costs of
          combined
          companies.......    5,460     5,941     6,710    1,793    1,701    2,543    3,227    3,758    3,700
                            -------   -------   -------   ------   ------   ------   ------   ------   ------
EQUITY AFFILIATES
Net costs of equity
  affiliates:
  Proved properties.......      197       199       441       34       37       45      163      162      147
                            -------   -------   -------   ------   ------   ------   ------   ------   ------
        Total.............  $ 5,657   $ 6,140   $ 7,151   $1,827   $1,738   $2,588   $3,390   $3,920   $3,847
                            =======   =======   =======   ======   ======   ======   ======   ======   ======
 
<CAPTION>
                                 OTHER REGIONS
                            ------------------------
       DECEMBER 31           1995     1996     1997
       -----------          ------   ------   ------
<S>                         <C>      <C>      <C>
COMBINED COMPANIES
Gross costs:
  Proved properties.......  $1,363   $1,391   $1,468
  Unproved properties.....     193      207      285
Accumulated depreciation,
  depletion, amortization
  and valuation
  allowances:
  Proved properties.......   1,043    1,043    1,103
  Unproved properties.....      73       73      183
                            ------   ------   ------
        Total net costs of
          combined
          companies.......     440      482      467
                            ------   ------   ------
EQUITY AFFILIATES
Net costs of equity
  affiliates:
  Proved properties.......      --       --      249(2)
                            ------   ------   ------
        Total.............  $  440   $  482   $  716
                            ======   ======   ======
</TABLE>
 
- ---------------
 
(1) Includes acquisition costs associated with gas reserves acquired in the
    South Texas Lobo trend.
 
(2) Includes Conoco's equity share of the Petrozuata heavy oil venture in
    Venezuela.
 
                                      F-32
<PAGE>   166
 
                          SUPPLEMENTAL PETROLEUM DATA
                                  (UNAUDITED)
                            (IN MILLIONS OF BARRELS)
 
ESTIMATED PROVED RESERVES OF OIL (1)
 
<TABLE>
<CAPTION>
                                              TOTAL WORLDWIDE       UNITED STATES            EUROPE           OTHER REGIONS
                                            -------------------   ------------------   ------------------   ------------------
                                            1995   1996   1997    1995   1996   1997   1995   1996   1997   1995   1996   1997
                                            ----   ----   -----   ----   ----   ----   ----   ----   ----   ----   ----   ----
<S>                                         <C>    <C>    <C>     <C>    <C>    <C>    <C>    <C>    <C>    <C>    <C>    <C>
PROVED DEVELOPED AND UNDEVELOPED RESERVES
  OF COMBINED COMPANIES
Beginning of year.........................   953    933     926   336    294    299    394    408    413    223    231    214
Revisions and other changes...............    (1)    55      54    (8)    11      3     (9)    36     43     16      8      8
Extensions and discoveries................   122     75      62    25     31     12     72     35     44     25      9      6
Improved recovery.........................     4      4       3     1      4      3      3     --     --     --     --     --
Purchase of reserves(2)...................     5     (1)      5     3     (1)     4     --     --      1      2     --     --
Sale of reserves(3).......................   (33)   (12)    (27)  (33)   (10)   (11)    --     --    (16)    --     (2)    --
Production................................  (117)  (128)   (130)  (30)   (30)   (33)   (52)   (66)   (64)   (35)   (32)   (33)
                                            ----   ----   -----   ---    ---    ---    ---    ---    ---    ---    ---    ---
End of year(4)............................   933    926     893   294    299    277    408    413    421    231    214    195
                                            ----   ----   -----   ---    ---    ---    ---    ---    ---    ---    ---    ---
PROVED DEVELOPED AND UNDEVELOPED RESERVES
  OF EQUITY AFFILIATES
Beginning of year.........................    35     44      47    --     --     --     35     44     47     --     --     --
Revisions and other changes...............     5      8      10    --     --     --      5      8     10     --     --     --
Extensions and discoveries................     8     --     680    --     --     --      8     --     --     --     --    680(5)
Production................................    (4)    (5)     (6)   --     --     --     (4)    (5)    (6)    --     --     --
                                            ----   ----   -----   ---    ---    ---    ---    ---    ---    ---    ---    ---
End of year...............................    44     47     731    --     --     --     44     47     51     --     --    680
                                            ----   ----   -----   ---    ---    ---    ---    ---    ---    ---    ---    ---
        Total.............................   977    973   1,624   294    299    277    452    460    472    231    214    875
                                            ----   ----   -----   ---    ---    ---    ---    ---    ---    ---    ---    ---
PROVED DEVELOPED RESERVES OF COMBINED
  COMPANIES
Beginning of year.........................   706    684     630   324    265    258    171    217    185    211    202    187
End of year...............................   684    630     600   265    258    242    217    185    174    202    187    184
PROVED DEVELOPED RESERVES OF EQUITY
  AFFILIATES
Beginning of year.........................    28     32      39    --     --     --     28     32     39     --     --     --
End of year...............................    32     39      43    --     --     --     32     39     43     --     --     --
</TABLE>
 
- ---------------
 
   
(1) Oil reserves comprise crude oil and condensate and natural gas liquids
    expected to be removed for the Company's account from its natural gas
    deliveries. Proved Developed Reserves and Proved Undeveloped Reserves are
    calculated according to the definitions set forth in Rule 4-10 of Regulation
    S-X of the Commission.
    
 
(2) Includes reserves acquired through property exchanges.
 
(3) Includes reserves disposed of through property exchanges.
 
(4) Includes reserves of 89 and 87 at year-end 1996 and 1997 attributable to
    Conoco Oil & Gas Associates L.P. in which there is a minority interest with
    an approximate 17 and 18 percent revenue share at year-end 1996 and 1997,
    respectively. See Note 18.
 
(5) Includes Conoco's equity share of the Petrozuata heavy oil venture in
    Venezuela.
 
                                      F-33
<PAGE>   167
 
                          SUPPLEMENTAL PETROLEUM DATA
                                  (UNAUDITED)
                            (IN BILLION CUBIC FEET)
 
   
ESTIMATED PROVED RESERVES OF GAS(1)
    
 
   
<TABLE>
<CAPTION>
                                   TOTAL WORLDWIDE           UNITED STATES               EUROPE                OTHER REGIONS
                                ---------------------    ---------------------    ---------------------    ---------------------
                                1995    1996    1997     1995    1996    1997     1995    1996    1997     1995    1996    1997
                                -----   -----   -----    -----   -----   -----    -----   -----   -----    -----   -----   -----
<S>                             <C>     <C>     <C>      <C>     <C>     <C>      <C>     <C>     <C>      <C>     <C>     <C>
PROVED DEVELOPED AND
  UNDEVELOPED RESERVES OF
  COMBINED COMPANIES
Beginning of year.............  4,330   4,709   5,063    1,749   1,891   1,822    2,431   2,649   3,068      150     169     173
Revisions and other changes...    292      41     134       95      79      --      195     (39)     97        2       1      37
Extensions and discoveries....    400     780     518      225     176     453      147     574      59       28      30       6
Improved recovery.............      1      --       1        1      --       1       --      --      --       --      --      --
Purchase of reserves(2).......    167      41     270      167       3     264(3)    --      36      --       --       2       6
Sale of reserves(4)...........    (78)    (71)    (62)     (78)    (57)    (46)      --      --      (7)      --     (14)     (9)
Production....................   (403)   (437)   (433)    (268)   (270)   (259)    (124)   (152)   (157)     (11)    (15)    (17)
                                -----   -----   -----    -----   -----   -----    -----   -----   -----    -----   -----   -----
End of year(5)................  4,709   5,063   5,491    1,891   1,822   2,235    2,649   3,068   3,060      169     173     196
                                -----   -----   -----    -----   -----   -----    -----   -----   -----    -----   -----   -----
PROVED DEVELOPED AND
  UNDEVELOPED RESERVES OF
  EQUITY AFFILIATES
Beginning of year.............    344     339     333      344     339     333       --      --      --       --      --      --
Revisions and other changes...     --      --      (6)      --      --      (6)      --      --      --       --      --      --
Extensions and discoveries....     --      --      49       --      --      49       --      --      --       --      --      --
Purchase of reserves..........     --      --      --       --      --      --       --      --      --       --      --      --
Sale of reserves..............     --      --      --       --      --      --       --      --      --       --      --      --
Production....................     (5)     (6)     (6)      (5)     (6)     (6)      --      --      --       --      --      --
                                -----   -----   -----    -----   -----   -----    -----   -----   -----    -----   -----   -----
End of year...................    339     333     370      339     333     370       --      --      --       --      --      --
                                -----   -----   -----    -----   -----   -----    -----   -----   -----    -----   -----   -----
        Total.................  5,048   5,396   5,861    2,230   2,155   2,605    2,649   3,068   3,060      169     173     196
                                =====   =====   =====    =====   =====   =====    =====   =====   =====    =====   =====   =====
PROVED DEVELOPED RESERVES OF
  COMBINED COMPANIES
Beginning of year.............  2,496   2,933   2,843    1,687   1,733   1,672      683   1,071   1,041      126     129     130
End of year...................  2,933   2,843   3,061    1,733   1,672   1,801    1,071   1,041   1,091      129     130     169
PROVED DEVELOPED RESERVES OF
  EQUITY AFFILIATES...........
Beginning of year.............     45      40      36       45      40      36       --      --      --       --      --      --
End of year...................     40      36      40       40      36      40       --      --      --       --      --      --
</TABLE>
    
 
- ---------------
 
   
(1) Oil reserves comprise crude oil and condensate and natural gas liquids
    expected to be removed for the Company's account from its natural gas
    deliveries. Proved Developed Reserves and Proved Undeveloped Reserves are
    calculated according to the definitions set forth in Rule 4-10 of Regulation
    S-X of the Commission.
    
 
   
(2) Includes reserves acquired through property exchanges.
    
 
   
(3) Includes reserves acquired in the South Texas Lobo trend.
    
 
   
(4) Includes reserves disposed of through property exchanges.
    
 
   
(5) Includes reserves of 104 and 115 at year-end 1996 and 1997, respectively,
    attributable to Conoco Oil & Associates L.P. in which there is a minority
    interest with an approximate 17 percent and 18 percent revenue share at
    year-end 1996 and 1997, respectively. See Note 18.
    
 
                                      F-34
<PAGE>   168
 
                          SUPPLEMENTAL PETROLEUM DATA
 
                                  (UNAUDITED)
 
STANDARDIZED MEASURE OF DISCOUNTED FUTURE NET CASH FLOWS RELATING TO PROVED OIL
AND GAS RESERVES
 
     The information on the following page has been prepared in accordance with
Statement of Financial Accounting Standards No. 69, which requires the
standardized measure of discounted future net cash flows to be based on year-end
sales prices, costs and statutory income tax rates and a 10 percent annual
discount rate. Specifically, the per-barrel oil sales prices used to calculate
the December 31, 1997, data averaged $15.34 for the United States, $16.11 for
Europe and $14.92 for Other Regions, and the gas prices per thousand cubic feet
averaged approximately $2.07 for the United States, $2.75 for Europe and $1.52
for Other Regions. Because prices used in the calculation are as of December 31,
the standardized measure could vary significantly from year to year based on
market conditions at that specific date.
 
     The projections should not be viewed as realistic estimates of future cash
flows nor should the "standardized measure" be interpreted as representing
current value to the Company. Material revisions to estimates of proved reserves
may occur in the future, development and production of the reserves may not
occur in the periods assumed, actual prices realized are expected to vary
significantly from those used and actual costs may also vary. The Company's
investment and operating decisions are not based on the information presented on
the following page, but on a wide range of reserve estimates that includes
probable as well as proved reserves, and on different price and cost assumptions
from those reflected in this information.
 
     Beyond the above considerations, the "standardized measure" is also not
directly comparable with asset balances appearing elsewhere in the financial
statements because any such comparison would require reconciling adjustments,
including reduction of the asset balances for related deferred income taxes.
 
                                      F-35
<PAGE>   169
 
                          SUPPLEMENTAL PETROLEUM DATA
                                  (UNAUDITED)
                             (DOLLARS IN MILLIONS)
 
STANDARDIZED MEASURE OF DISCOUNTED FUTURE NET CASH FLOWS RELATING TO PROVED OIL
AND GAS RESERVES
<TABLE>
<CAPTION>
                               TOTAL WORLDWIDE                 UNITED STATES                    EUROPE
                         ----------------------------   ---------------------------   ---------------------------
                          1995       1996      1997      1995      1996      1997      1995      1996      1997
                         -------   --------   -------   -------   -------   -------   -------   -------   -------
<S>                      <C>       <C>        <C>       <C>       <C>       <C>       <C>       <C>       <C>
COMBINED COMPANIES
Future cash flows:
  Revenues.............  $26,766   $ 34,366   $26,666   $ 7,631   $10,044   $ 8,355   $14,995   $19,364   $15,119
  Production costs.....   (9,152)   (10,406)   (9,251)   (3,038)   (3,085)   (2,997)   (5,154)   (6,378)   (5,387)
  Development costs....   (1,583)    (1,669)   (1,586)     (218)     (283)     (446)   (1,234)   (1,294)   (1,094)
  Income tax expense...   (7,404)   (10,364)   (6,822)   (1,169)   (2,041)   (1,175)   (3,758)   (5,179)   (3,921)
                         -------   --------   -------   -------   -------   -------   -------   -------   -------
Future net cash
  flows................    8,627     11,927     9,007     3,206     4,635     3,737     4,849     6,513     4,717
Discounted to present
  value at a 10% annual
  rate.................   (3,469)    (4,638)   (3,384)   (1,456)   (2,088)   (1,552)   (1,813)   (2,317)   (1,679)
                         -------   --------   -------   -------   -------   -------   -------   -------   -------
        Total*.........    5,158      7,289     5,623     1,750     2,547     2,185     3,036     4,196     3,038
                         -------   --------   -------   -------   -------   -------   -------   -------   -------
EQUITY AFFILIATES
Future cash flows:
  Revenues.............    1,401      1,971     8,520       647       968       893       754     1,003       651
  Production costs.....     (617)      (597)   (2,640)     (246)     (242)     (267)     (371)     (355)     (315)
  Development costs....     (237)      (180)   (1,300)     (205)     (157)     (174)      (32)      (23)      (30)
  Income tax expense...     (209)      (496)   (1,090)      (51)     (193)     (161)     (158)     (303)     (170)
                         -------   --------   -------   -------   -------   -------   -------   -------   -------
Future net cash
  flows................      338        698     3,490       145       376       291       193       322       136
Discounted to present
  value at a 10% annual
  rate.................     (187)      (398)   (2,886)     (116)     (277)     (226)      (71)     (121)      (44)
                         -------   --------   -------   -------   -------   -------   -------   -------   -------
        Total..........      151        300       604        29        99        65       122       201        92
                         -------   --------   -------   -------   -------   -------   -------   -------   -------
        Total..........  $ 5,309   $  7,589   $ 6,227   $ 1,779   $ 2,646   $ 2,250   $ 3,158   $ 4,397   $ 3,130
                         =======   ========   =======   =======   =======   =======   =======   =======   =======
 
<CAPTION>
                                OTHER REGIONS
                         ---------------------------
                          1995      1996      1997
                         -------   -------   -------
<S>                      <C>       <C>       <C>
COMBINED COMPANIES
Future cash flows:
  Revenues.............  $ 4,140   $ 4,958   $ 3,192
  Production costs.....     (960)     (943)     (867)
  Development costs....     (131)      (92)      (46)
  Income tax expense...   (2,477)   (3,144)   (1,726)
                         -------   -------   -------
Future net cash
  flows................      572       779       553
Discounted to present
  value at a 10% annual
  rate.................     (200)     (233)     (153)
                         -------   -------   -------
        Total*.........      372       546       400
                         -------   -------   -------
EQUITY AFFILIATES
Future cash flows:
  Revenues.............       --        --     6,976
  Production costs.....       --        --    (2,058)
  Development costs....       --        --    (1,096)
  Income tax expense...       --        --      (759)
                         -------   -------   -------
Future net cash
  flows................       --        --     3,063
Discounted to present
  value at a 10% annual
  rate.................       --        --    (2,616)
                         -------   -------   -------
        Total..........       --        --       447
                         -------   -------   -------
        Total..........  $   372   $   546   $   847
                         =======   =======   =======
</TABLE>
 
- ---------------
 
* Includes $686 and $372 at year-end 1996 and 1997, respectively, attributable
  to Conoco Oil & Gas Associates L.P. in which there is a minority interest with
  an approximate 17 and 18 percent revenue share at year-end 1996 and 1997,
  respectively. See Note 18.
 
SUMMARY OF CHANGES IN STANDARDIZED MEASURE OF DISCOUNTED FUTURE NET CASH FLOWS
RELATING TO PROVED OIL AND GAS RESERVES
 
<TABLE>
<CAPTION>
                                                      COMBINED COMPANIES           EQUITY AFFILIATES
                                                  ---------------------------   -----------------------
                                                   1995      1996      1997     1995    1996     1997
                                                  -------   -------   -------   -----   -----   -------
<S>                                               <C>       <C>       <C>       <C>     <C>     <C>
Balance at January 1............................  $ 4,275   $ 5,158   $ 7,289   $ 145   $ 151   $   300
Sales and transfers of oil and gas produced, net
  of production costs...........................   (1,998)   (2,647)   (2,583)    (42)    (73)      (56)
Development costs incurred during the period....      745       828       921      14      20       218
Net changes in prices and in development and
  production costs..............................      675     2,525    (4,974)     81     119    (1,242)
Extensions, discoveries and improved recovery,
  less related costs............................    1,219     1,630       818      --       4     1,181
Revisions of previous quantity estimates........      375       553       439      68      83        37
Purchases (sales) of reserves in place -- net...      (62)      (54)       36      --      --        --
Accretion of discount...........................      753       931     1,312      13      25        55
Net change in income taxes......................     (897)   (1,676)    2,285    (108)   (152)       16
Other...........................................       73        41        80     (20)    123        95
                                                  -------   -------   -------   -----   -----   -------
Balance at December 31..........................  $ 5,158   $ 7,289   $ 5,623   $ 151   $ 300   $   604
                                                  =======   =======   =======   =====   =====   =======
</TABLE>
 
                                      F-36
<PAGE>   170
 
                       COMBINED QUARTERLY FINANCIAL DATA
                                  (UNAUDITED)
                             (DOLLARS IN MILLIONS)
 
   
<TABLE>
<CAPTION>
                                                                     QUARTER ENDED
                                                    -----------------------------------------------
                                                    MARCH 31   JUNE 30   SEPTEMBER 30   DECEMBER 31
                                                    --------   -------   ------------   -----------
<S>                                                 <C>        <C>       <C>            <C>
1996
HISTORICAL
Sales and Other Operating Revenues(1).............   $5,474    $5,994       $5,999        $6,763
Cost of Goods Sold and Other Expenses(2)..........    5,091     5,548        5,509         6,293
Interest & Debt Expense...........................       22        18           16            18
Net Income........................................      207(3)    188(4)       267(5)        201
1997
HISTORICAL
Sales and Other Operating Revenues(1).............   $6,560    $5,915       $6,671        $6,650
Cost of Goods Sold and Other Expenses(2)..........    5,898     5,501        6,269         6,452
Interest & Debt Expense...........................       15         9            7             5
Net Income........................................      341       246(6)       289(7)        221(8)
 
Pro Forma Earnings Per Share(9)
  Basic...........................................   $ 0.56    $ 0.41       $ 0.48        $ 0.36
  Diluted.........................................   $ 0.56    $ 0.40       $ 0.47        $ 0.36
Pro Forma Weighted Average Shares Outstanding(9)
  Basic...........................................      606       606          606           606
  Diluted.........................................      611       611          611           611
</TABLE>
    
 
- ---------------
 
(1) Excludes other income of $64, $10, $74 and $38 in each of the quarters in
    1996 and $55, $70, $28 and $314 in each of the quarters in 1997.
 
(2) Excludes provision for income taxes.
 
(3) Includes gain of $16 from sale of U.S. producing properties.
 
(4) Includes a net charge of $41 reflecting: a charge of $63 for write-down of
    investment in a European natural gas marketing joint venture; a charge of
    $22 principally for employee separation costs; and a benefit of $44 related
    to environmental insurance recoveries.
 
(5) Includes gain of $19 from sale of Ireland marketing operations.
 
   
(6) Includes gain of $24 from sale of U.S. producing properties.
    
 
   
(7) Includes net benefit of $37 reflecting: gain of $30 from sale of North Sea
    properties; benefit of $30 from foreign tax rate change; and charge of $23
    for litigation settlements.
    
 
   
(8) Includes a net benefit of $19 reflecting: a gain of $186 from the sale of
    North Sea and U.S. Upstream properties; a charge of $112 for impairment of
    nonrevenue producing properties; and a charge of $55 for write-down of an
    office building held for sale.
    
 
   
(9) See Note 2 to the Combined Financial Statements.
    
 
                                      F-37
<PAGE>   171
 
   
                        INDEPENDENT ACCOUNTANT'S REPORT
    
 
   
To the Board of Directors and Shareholders
of E. I. du Pont de Nemours and Company
    
 
   
     We have reviewed the accompanying combined balance sheet of Conoco as of
June 30, 1998, and the related combined statements of income and of cash flows
for the six-month periods ended June 30, 1998 and 1997. This financial
information is the responsibility of the Company's management.
    
 
   
     We conducted our review in accordance with standards established by the
American Institute of Certified Public Accountants. A review of interim
financial information consists principally of applying analytical procedures to
financial data and making inquiries of persons responsible for financial and
accounting matters. It is substantially less in scope than an audit conducted in
accordance with generally accepted auditing standards, the objective of which is
the expression of an opinion regarding the financial statements taken as a
whole. Accordingly, we do not express such an opinion.
    
 
   
     Based on our review, we are not aware of any material modifications that
should be made to the accompanying combined interim financial information for it
to be in conformity with generally accepted accounting principles.
    
 
   
     We previously audited in accordance with generally accepted auditing
standards the combined balance sheet as of December 31, 1997 and the related
combined statements of income, of cash flows, and of owner's net investment and
accumulated other comprehensive loss for the year then ended, and in our report
dated July 24, 1998 presented on page F-2 of this Registration Statement we
expressed an unqualified opinion on those combined financial statements. In our
opinion, the information set forth in the accompanying combined balance sheet
information as of December 31, 1997 is fairly stated in all material respects in
relation to the combined balance sheet from which it has been derived.
    
 
   
PRICEWATERHOUSECOOPERS LLP
    
 
   
Houston, Texas
    
   
September 28, 1998
    
 
                                      F-38
<PAGE>   172
 
                     INTERIM COMBINED FINANCIAL STATEMENTS
 
                                     CONOCO
 
                  COMBINED STATEMENT OF INCOME (NOTES 1 AND 2)
                                  (UNAUDITED)
 
   
<TABLE>
<CAPTION>
                                                               SIX MONTHS ENDED
                                                                    JUNE 30
                                                              -------------------
                                                               1997        1998
                                                              -------     -------
                                                                 (IN MILLIONS,
                                                               EXCEPT PER SHARE)
<S>                                                           <C>         <C>
Revenues
  Sales and Other Operating Revenues*.......................  $12,475     $11,348
  Other Income..............................................      125         138
                                                              -------     -------
          Total Revenues....................................   12,600      11,486
                                                              -------     -------
Costs and Expenses
  Cost of Goods Sold and Other Operating Expenses...........    7,667       6,754
  Selling, General and Administrative Expenses..............      355         370
  Exploration Expenses......................................      192         176
  Depreciation, Depletion and Amortization..................      516         505
  Taxes Other Than on Income*...............................    2,669       2,896
  Interest and Debt Expense.................................       24           1
                                                              -------     -------
          Total Costs and Expenses..........................   11,423      10,702
                                                              -------     -------
Income Before Income Taxes..................................    1,177         784
Provision for Income Taxes..................................      590         254
                                                              -------     -------
Net Income (Note 3).........................................  $   587     $   530
                                                              =======     =======
Pro Forma Earnings Per Share(Note 4)........................
  Basic.....................................................  $  0.97     $  0.88
  Diluted...................................................  $  0.96     $  0.87
Pro Forma Weighted Average Shares Outstanding(Note 4).......
  Basic.....................................................      606         606
  Diluted...................................................      611         611
- ---------------
* Includes petroleum excise taxes...........................  $ 2,577     $ 2,806
</TABLE>
    
 
        See accompanying Notes to Interim Combined Financial Statements
 
                                      F-39
<PAGE>   173
 
                     INTERIM COMBINED FINANCIAL STATEMENTS
 
                                     CONOCO
 
                     COMBINED BALANCE SHEET (NOTES 1 AND 2)
                                  (UNAUDITED)
 
                                     ASSETS
 
   
<TABLE>
<CAPTION>
                                                                                JUNE 30, 1998
                                                          DECEMBER 31,    --------------------------
                                                              1997        HISTORICAL   PRO FORMA (5)
                                                          ------------    ----------   -------------
                                                                        (IN MILLIONS)
<S>                                                       <C>             <C>          <C>
Current Assets
  Cash and Cash Equivalents.............................    $  1,147       $    829      $    123
  Marketable Securities.................................           7              7             7
  Accounts and Notes Receivable.........................       1,497          1,252         1,252
  Notes Receivable -- Related Parties...................         490            465           377
  Inventories (Note 6)..................................         830            981           981
  Prepaid Expenses......................................         236            305           305
                                                            --------       --------      --------
          Total Current Assets..........................       4,207          3,839         3,045
Property, Plant and Equipment...........................      21,229         21,569        21,569
Less: Accumulated Depreciation, Depletion and
  Amortization..........................................     (10,401)       (10,521)      (10,521)
                                                            --------       --------      --------
Net Property, Plant and Equipment.......................      10,828         11,048        11,048
                                                            --------       --------      --------
Investment in Affiliates................................       1,085          1,141         1,141
Long-Term Notes Receivable -- Related Parties...........         450            612            --
Other Assets............................................         492            524           461
                                                            --------       --------      --------
          Total.........................................    $ 17,062       $ 17,164      $ 15,695
                                                            ========       ========      ========
          LIABILITIES AND OWNER'S NET INVESTMENT AND ACCUMULATED OTHER COMPREHENSIVE LOSS
Current Liabilities
  Accounts Payable......................................    $  1,090       $  1,129      $  1,129
  Short-Term Borrowings -- Related Parties..............         644          1,087           272
  Other Short-Term Borrowings and Capital Lease
     Obligations........................................          72             51            51
  Income Taxes..........................................         545            253           253
  Other Accrued Liabilities.............................       1,289          1,043         1,043
                                                            --------       --------      --------
          Total Current Liabilities.....................       3,640          3,563         2,748
Long-Term Borrowings -- Related Parties.................       1,450          1,181         1,002
Long-Term Borrowings -- Other Related Party (Note 5)....          --             --         7,500
Other Long-Term Borrowings and Capital Lease
  Obligations...........................................         106            103           103
Deferred Income Taxes...................................       1,739          1,861         1,837
Other Liabilities and Deferred Credits..................       1,922          1,925         1,925
                                                            --------       --------      --------
          Total Liabilities.............................       8,857          8,633        15,115
                                                            --------       --------      --------
Commitments and Contingent Liabilities (Note 8)
Minority Interests......................................         309            308           308
 
Owner's Net Investment..................................       8,087          8,441           490
Accumulated Other Comprehensive Loss (Note 7)...........        (191)          (218)         (218)
                                                            --------       --------      --------
          Total Owner's Net Investment and Accumulated
            Other Comprehensive Loss....................       7,896          8,223           272
                                                            --------       --------      --------
          Total.........................................    $ 17,062       $ 17,164      $ 15,695
                                                            ========       ========      ========
</TABLE>
    
 
        See accompanying Notes to Interim Combined Financial Statements
                                      F-40
<PAGE>   174
                     INTERIM COMBINED FINANCIAL STATEMENTS
 
                                     CONOCO
 
                COMBINED STATEMENT OF CASH FLOWS (NOTES 1 AND 2)
                                  (UNAUDITED)
 
   
<TABLE>
<CAPTION>
                                                               SIX MONTHS ENDED
                                                                   JUNE 30
                                                              ------------------
                                                               1997        1998
                                                              -------     ------
                                                                (IN MILLIONS)
<S>                                                           <C>         <C>
Cash Provided by Operations
  Net Income................................................  $   587     $  530
  Adjustments to Reconcile Net Income to Cash Provided by
     Operations:
     Depreciation, Depletion and Amortization...............      516        505
     Dry Hole Costs and Impairment of Unproved Properties...       67         68
     Deferred Income Taxes..................................      113        107
     Income Applicable to Minority Interests................       13         11
     Other Noncash Charges and Credits -- Net...............      (77)       (55)
     Decrease (Increase) in Operating Assets:
       Accounts and Notes Receivable........................      191         85
       Inventories..........................................     (189)      (153)
       Other Operating Assets...............................     (120)       (90)
     Increase (Decrease) in Operating Liabilities:
       Accounts Payable and Other Operating Liabilities.....     (121)      (191)
       Accrued Interest and Income Taxes....................     (125)      (269)
                                                              -------     ------
          Cash Provided by Operations.......................      855        548
                                                              -------     ------
Investment Activities
  Purchases of Property, Plant and Equipment................   (1,611)      (941)
  Investments in Affiliates.................................     (204)      (109)
  Proceeds from Sales of Assets.............................      134        348
  Net Decrease (Increase) in Short-Term Financial
     Instruments............................................      (32)       (16)
                                                              -------     ------
          Cash Used for Investment Activities...............   (1,713)      (718)
                                                              -------     ------
Financing Activities
  Short-Term Borrowings  -- Receipts........................       --         --
                         -- Payments........................       (1)       (19)
  Other Long-Term Borrowings -- Receipts....................       --         --
                             -- Payments....................       (1)        (2)
  Transactions with Related Parties:
     Notes Receivable -- Receipts...........................      322         25
                      -- Payments...........................      (44)      (162)
     Borrowings -- Receipts.................................      670        260
                -- Payments.................................     (327)       (62)
     Net Cash Contribution From (To) Owner..................      335       (177)
  Increase (Decrease) in Minority Interests.................      (11)       (12)
                                                              -------     ------
          Cash Provided by (Used for) Financing
           Activities.......................................      943       (149)
                                                              -------     ------
Effect of Exchange Rate Changes on Cash.....................      (42)         1
                                                              -------     ------
Increase (Decrease) in Cash and Cash Equivalents............  $    43     $ (318)
Cash and Cash Equivalents at Beginning of Year..............      846      1,147
                                                              -------     ------
Cash and Cash Equivalents at June 30........................  $   889     $  829
                                                              =======     ======
</TABLE>
    
 
        See accompanying Notes to Interim Combined Financial Statements
 
                                      F-41
<PAGE>   175
 
                 NOTES TO INTERIM COMBINED FINANCIAL STATEMENTS
                                  (UNAUDITED)
                             (DOLLARS IN MILLIONS)
 
1. BASIS OF PRESENTATION
 
     On May 11, 1998, E. I. du Pont de Nemours and Company ("DuPont") announced
its intention to offer in an initial public offering a portion of its interest
in the common stock of Conoco Inc., a wholly owned energy subsidiary. This
initial public offering is DuPont's first step in the planned divestiture of its
entire petroleum business.
 
     Throughout the period covered by the Combined Financial Statements,
operations were conducted by Conoco Inc., subsidiaries of Conoco Inc. and, in
some cases, subsidiaries of DuPont. These operations are collectively referred
to herein as the Company or "Conoco". Certain subsidiaries and, in some cases,
assets, liabilities, and related operations not currently owned by Conoco will
be transferred to Conoco. The accompanying Combined Financial Statements are
presented on a carve-out basis and include the historical operations of entities
owned by Conoco and operations to be transferred to Conoco by DuPont. In this
context, no direct ownership relationship existed among all the various units
comprising Conoco; accordingly, DuPont and its subsidiaries' net investment in
Conoco ("Owner's Net Investment") is shown in lieu of Stockholder's Equity in
the Combined Financial Statements. The Combined Financial Statements included
herein have been prepared from DuPont's historical accounting records.
 
     These Combined Interim Financial Statements are unaudited, but reflect all
adjustments that, in the opinion of management, are necessary to provide a fair
presentation of the financial position, results of operations and cash flows for
the dates and periods covered. All such adjustments are of a normal recurring
nature. Interim period results are not necessarily indicative of results of
operations or cash flows for a full-year period. These interim statements should
be read in conjunction with the Audited Combined Financial Statements for the
years ended December 31, 1995, 1996 and 1997 presented herein.
 
2. RELATED PARTY TRANSACTIONS
 
     The Combined Financial Statements include significant transactions with
DuPont involving services (such as cash management, other financial services,
purchasing, legal, computer and corporate aviation) that were provided between
Conoco and centralized DuPont organizations. The costs of services have been
directly charged or allocated between Conoco and DuPont using methods management
believes are reasonable. Such charges and allocations are not necessarily
indicative of what would have been incurred if Conoco had been a separate
entity. Amounts charged and allocated to Conoco for these services were $63 and
$72 for the first six months of 1997 and 1998, respectively, and are principally
included in Selling, General and Administrative Expenses. Conoco provided DuPont
services such as computer, legal and purchasing, as well as certain technical
and plant operating services, which amounted to $31 and $25 in first six months
of 1997 and 1998, respectively. These charges to DuPont were treated as
reductions of Cost of Goods Sold and Other Operating Expenses and Selling,
General and Administrative Expenses.
 
     Interest expense charged by DuPont was $65 and $55 for the first six months
of 1997 and 1998, respectively, and reflects market-based rates. A portion of
historical related party interest cost and other interest expense of $44 and $57
was capitalized as cost associated with major construction projects in the first
six months of 1997 and 1998, respectively. Interest income from DuPont was $6
and $33 for the same periods and also reflects market-based rates.
 
     Sales and Other Operating Revenues include sales of products from Conoco to
DuPont, principally natural gas and gas liquids to supply several DuPont plant
sites. These sales totaled $231 and $209 for the first six months of 1997 and
1998, respectively. Also included are revenues from insurance premiums charged
DuPont for property and casualty coverage outside the United States. These
revenues totaled $11 and $10 for the first six months of 1997 and 1998,
respectively. Purchases of products from DuPont during these periods were not
material.
 
                                      F-42
<PAGE>   176
         NOTES TO INTERIM COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
                                  (UNAUDITED)
                             (DOLLARS IN MILLIONS)
 
   
     These intercompany arrangements between DuPont and Conoco will continue
after the Offerings under transition service agreements or other long-term
agreements. It is not anticipated that a change, if any, in these costs and
revenues would have a material effect on the Company's results of operations or
combined financial position.
    
 
     Accounts and Notes Receivable include amounts due from DuPont of $79 and
$34 at December 31, 1997, and June 30, 1998, respectively, representing current
month balances of transactions between Conoco and DuPont, mainly product sales
and net interest on borrowings. Accounts Payable include amounts due DuPont of
$4 and $40 at December 31, 1997, and June 30, 1998, respectively.
 
     Amounts representing notes receivable or borrowings from DuPont, including
its subsidiary organizations, are identified for related parties and presented
separately in the Combined Balance Sheet. The current portion of Notes
Receivable represents the accumulation of a variety of cash transfers and
operating transactions with DuPont. These balances are generally
interest-bearing and represent net amounts of cash transferred for funding and
cash management purposes and amounts charged between the companies for certain
product and service purchases and asset transfers. The long-term portion of
Notes Receivable and amounts shown for Short-Term and Long-Term Borrowings
represent borrowings between Conoco and DuPont with established due dates at
market-based interest rates, except for certain short-term non-interest bearing
borrowings due DuPont of $492 at December 31, 1997, and June 30, 1998.
 
3. SPECIAL ITEMS
 
     Net income for the first six months of 1997 included a gain of $24 from the
sale of certain Upstream North Sea properties. Net income for the first six
months of 1998 included a gain of $23 from the sale of certain Upstream North
Sea properties and a $31 tax benefit from the sale of an international Upstream
subsidiary, partly offset by a $28 charge for U.S. Downstream litigation.
 
4. EARNINGS PER SHARE
 
     The Company's historical capital structure is not indicative of its
prospective structure since no direct ownership relationship existed among all
the various units comprising Conoco. Accordingly, historical earnings per share
has not been presented in the interim Combined Financial Statements.
 
   
     Unaudited pro forma basic earnings per share includes the shares of both
the Class A and Class B common shares deemed to be outstanding as of the date of
the Offerings. Unaudited pro forma diluted earnings per share includes the
dilutive effect of the 5.8 million shares of Conoco Common Stock issuable upon
exercise of Conoco stock options (see Note 20 to the Combined Financial
Statements), after applying the treasury stock method, which are expected to be
issued upon cancellation of outstanding DuPont stock options, using the
anticipated weighted-average exercise price of the outstanding options and the
anticipated initial public offering price. In accordance with SEC Staff
Accounting Bulletin No. 98, pro forma basic and diluted earnings per share have
been presented for the most recent annual and subsequent interim periods only.
    
 
5. INTERIM PRO FORMA COMBINED BALANCE SHEET
 
   
     The unaudited pro forma column on the accompanying combined balance sheet
reflects the application of pro forma adjustments to the historical amounts as
of June 30, 1998. In July 1998, a dividend of $7,500 was declared and paid by
the Company in the form of a promissory note to all shareholders of record as of
July 20, 1998. The promissory note is due January 2, 2000 and bears interest at
an annual interest rate of 6.0125 percent. On September 28, 1998, the Company
declared a dividend of a receivable from DuPont evidenced by a promissory note
in the amount of $700 million. Prior to or concurrent with the Offerings, DuPont
and Conoco will enter into a Restructuring, Transfer and Separation Agreement
and certain other agreements with respect to employee benefit arrangements,
information management, the provision of interim services,
    
 
                                      F-43
<PAGE>   177
         NOTES TO INTERIM COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
                                  (UNAUDITED)
                             (DOLLARS IN MILLIONS)
 
   
financing arrangements, tax sharing, environmental liabilities and various
commercial arrangements. These agreements generally provide for restructuring
and settlement of certain intercompany loans, purchase or transfer of certain
subsidiaries, and other arrangements to be undertaken in connection with the
Separation and the Offerings.
    
 
   
     The unaudited pro forma column reflects the dividends and adjustments, as
provided for in the Separation Agreement, for (a) the settlement of intercompany
loans, (b) the purchase of certain subsidiaries from DuPont and the refund of
prepaid insurance premiums to DuPont in the amount of $267, and (c) the effect
of the separate return income tax method reflecting a reduction in Deferred
Income Taxes ($24) resulting from the transfer of international production
subsidiaries from the original tax jurisdiction to another tax jurisdiction.
    
 
6. INVENTORIES
 
<TABLE>
<CAPTION>
                                                              DECEMBER 31,    JUNE 30,
                                                                  1997          1998
                                                              ------------    --------
<S>                                                           <C>             <C>
Crude oil and petroleum products............................      $675          $821
Other merchandise...........................................        25            24
Materials and supplies......................................       130           136
                                                                  ----          ----
                                                                  $830          $981
                                                                  ====          ====
</TABLE>
 
7. OTHER COMPREHENSIVE INCOME
 
     The following sets forth the Company's comprehensive income for the periods
shown:
 
<TABLE>
<CAPTION>
                                                                SIX MONTHS ENDED JUNE 30
                                                              ----------------------------
                                                                  1997            1998
                                                              -------------   ------------
<S>                                                           <C>             <C>
Net Income..................................................     $  587           $530
Other Comprehensive Income (Loss):
  Foreign Currency Translation Adjustment...................       (113)           (27)
  Minimum Pension Liability Adjustment......................         --             --
                                                                 ------           ----
Comprehensive Income........................................     $  474           $503
                                                                 ======           ====
</TABLE>
 
8. COMMITMENTS AND CONTINGENT LIABILITIES
 
     The Company has various purchase commitments for materials, supplies and
items of permanent investment incident to the ordinary conduct of business. In
the aggregate, such commitments are not at prices in excess of current market.
In addition, at June 30, 1998, the Company has obligations to purchase, over
periods up to twenty years, natural gas at prices that were in excess of current
market prices. No material annual loss is expected from these long-term
commitments.
 
     The Company is subject to various lawsuits and claims involving a variety
of matters including, along with other oil companies, actions challenging oil
and gas royalty and severance tax payments based on posted prices, and claims
for damages resulting from leaking underground storage tanks. In general, the
effect on future financial results is not subject to reasonable estimation
because considerable uncertainty exists. The Company believes the ultimate
liabilities resulting from such lawsuits and claims may be material to results
of operations in the period in which they are recognized but will not materially
affect the combined financial position of the Company. In the six months of
1998, the Company recorded non-recurring after-tax charges of $28 for
anticipated costs to resolve various litigation.
 
                                      F-44
<PAGE>   178
         NOTES TO INTERIM COMBINED FINANCIAL STATEMENTS -- (CONTINUED)
                                  (UNAUDITED)
                             (DOLLARS IN MILLIONS)
 
     The Company is also subject to contingencies pursuant to environmental laws
and regulations that in the future may require the Company to take further
action to correct the effects on the environment of prior disposal practices or
releases of petroleum substances by the Company or other parties. The Company
has accrued for certain environmental remediation activities consistent with the
policy set forth in Note 2 to the Combined Financial Statements. At June 30,
1998, such accrual amounted to $140 and, in management's opinion, was
appropriate based on existing facts and circumstances. Under adverse changes in
circumstances, potential liability may exceed amounts accrued. In the event
future monitoring and remediation expenditures are in excess of amounts accrued,
they may be significant to results of operations in the period recognized but
management does not anticipate they will have a material adverse effect on the
combined financial position of the Company.
 
   
     The Company has indirectly guaranteed various debt obligations under
agreements with certain affiliates and other companies to provide specified
minimum revenues from shipments or purchases of products. At June 30, 1998,
these indirect guarantees totaled $19, and the Company or DuPont, on behalf of
the Company, had directly guaranteed $1,168 of the obligations of certain
affiliated companies and others. The Company, along with certain European DuPont
subsidiaries, also participates in a multiparty account banking agreement, which
provides for the indirect guarantee of bank account overdrafts of certain
European DuPont subsidiaries. Management believes the exposure under this
agreement is not material and expects to terminate the agreement prior to
completion of the Offerings. No material loss is anticipated by reason of such
agreements and guarantees.
    
 
                                      F-45
<PAGE>   179
 
                                    ANNEX A
                            DEGOLYER AND MACNAUGHTON
                               ONE ENERGY SQUARE
                              DALLAS, TEXAS 75206
 
   
                               September 23, 1998
    
 
Conoco Inc.
600 North Dairy Ashford
Houston, Texas 77001-6651
 
Gentlemen:
 
     Pursuant to your request, we have prepared estimates of the proved oil,
condensate, natural gas liquids, and natural gas reserves, as of December 31,
1997, of certain properties in Canada, Nigeria, Norway, Russia, the United
Kingdom, the United States, and Venezuela owned by Conoco Inc. (Conoco). The
properties consist of working interests located in Alberta, Canada, in the
offshore waters of Nigeria, Norway, and the United Kingdom, in northern European
Russia, in Colorado, New Mexico, Virginia, Texas and in the offshore waters of
Louisiana of the United States, and in the Orinoco Heavy Oil Belt of Venezuela.
The estimates are discussed in detail in our "Report as of December 31, 1997 on
Proved Reserves of Certain Properties owned by Conoco Inc.," (the Report). We
also have reviewed Conoco's estimates of the reserves, as of December 31, 1997,
of the same properties included in the Report.
 
   
     Proved reserves estimated by us and referred to herein have, in our
opinion, been prepared in accordance with Rule 4-10(a)(2) of Regulation S-X of
the Securities and Exchange Commission of the United States.
    
 
     Conoco represents that its estimates of the proved reserves, as of December
31, 1997, net to its leasehold interests in the properties included in the
Report are as follows, expressed in millions of barrels (MMbbl) or billions of
cubic feet (Bcf):
 
<TABLE>
<CAPTION>
OIL, CONDENSATE, AND
NATURAL GAS LIQUIDS    NATURAL GAS   NET EQUIVALENT
      (MMBBL)             (BCF)         (MMBBL)
- --------------------   -----------   --------------
<S>                    <C>           <C>
       1,260              4,523          2,014
</TABLE>
 
        Note: Net-equivalent million barrels is based on 6,000 cubic
              feet of gas being equivalent to 1 barrel of oil,
              condensate, or natural gas liquids.
 
     Conoco has advised us, and we have assumed, that its estimates of proved
oil, condensate, natural gas liquids, and natural gas reserves are in accordance
with the rules and regulations of the Securities and Exchange Commission.
 
                                       A-1
<PAGE>   180
 
DEGOLYER AND MACNAUGHTON
 
     Our estimates of the proved reserves, as of December 31, 1997, of the
properties included in the Report are as follows, expressed in millions of
barrels (MMbbl) or billions of cubic feet (Bcf):
 
<TABLE>
<CAPTION>
OIL, CONDENSATE, AND
NATURAL GAS LIQUIDS    NATURAL GAS   NET EQUIVALENT
      (MMBBL)             (BCF)         (MMBBL)
- --------------------   -----------   --------------
<S>                    <C>           <C>
       1,255              4,498          2,005
</TABLE>
 
        Note: Net-equivalent million barrels is based on 6,000 cubic
              feet of gas being equivalent to 1 barrel of oil,
              condensate, or natural gas liquids.
 
     In comparing the detailed reserves estimates prepared by us and those
prepared by Conoco for the properties involved, we have found differences, both
positive and negative, in reserves estimates for individual properties. These
differences appear to be compensating to a great extent when considering the
reserves of Conoco in the properties included in the Report, resulting in
overall differences not being substantial. It is our opinion that the reserves
estimates prepared by Conoco on the properties reviewed by us and referred to
above, when compared on the basis of net equivalent million barrels of oil, do
not differ materially from those prepared by us.
 
                                          Submitted,
 
                                          /s/ DeGOLYER and MacNAUGHTON
 
                                          DeGOLYER and MacNAUGHTON
 
[SEAL]
 
                                          /s/ W.G. McGILVRAY, P.E.
                                          W.G. McGilvray, P.E.
                                          Executive Vice President
                                          DeGolyer and MacNaughton
                                       A-2
<PAGE>   181
 
                                  CONOCO LOGO
<PAGE>   182
 
INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT. A
REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE
SECURITIES AND EXCHANGE COMMISSION. THESE SECURITIES MAY NOT BE SOLD NOR MAY
OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION STATEMENT BECOMES
EFFECTIVE. THIS PROSPECTUS SHALL NOT CONSTITUTE AN OFFER TO SELL OR THE
SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE SECURITIES
IN ANY STATE IN WHICH SUCH OFFER, SOLICITATION OR SALE WOULD BE UNLAWFUL PRIOR
TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH STATE.
 
                 [ALTERNATE PAGE FOR INTERNATIONAL PROSPECTUS]
   
PROSPECTUS (Subject to Completion)
    
   
Issued September 28, 1998
    
 
                                                                   [CONOCO LOGO]
   
                               150,000,000 Shares
    
 
                                  Conoco Inc.
                              CLASS A COMMON STOCK
                            ------------------------
 
   
   Of the 150,000,000 shares of the Class A Common Stock of Conoco Inc. (the
   "Company" or "Conoco") being offered, 135,000,000 shares are being offered
 initially in the United States and Canada by the U.S. Underwriters (the "U.S.
Offering") and 15,000,000 shares are being offered initially outside the United
    States and Canada by the International Underwriters (the "International
Offering" and, together with the U.S. Offering, the "Offerings"). Each share of
 Class A Common Stock will have attached one Preferred Share Purchase Right (a
 "Right") which will initially trade together with the share. All of the shares
of Class A Common Stock offered hereby are being sold by the Company. The price
  to public and the underwriting discount per share will be identical for both
  Offerings. Prior to these Offerings, there has been no public market for the
 Class A Common Stock. It is currently estimated that the public offering price
 per share will be between $20 and $24. See "Underwriters" for a discussion of
 the factors to be considered in determining the initial public offering price.
    
   
  The Company has two classes of authorized common stock consisting of Class A
Common Stock offered hereby and Class B Common Stock (collectively, the "Common
Stock"). See "Description of Capital Stock." Holders of Class A Common Stock are
entitled to one vote per share and holders of Class B Common Stock are entitled
  to five votes per share on each matter submitted to a vote of stockholders.
    Prior to the Offerings, E. I. du Pont de Nemours and Company ("DuPont")
 indirectly owned 100 percent of the outstanding shares of the Company's Common
 Stock, and immediately after completion of the Offerings, DuPont, through its
     ownership of 100 percent of the outstanding Class B Common Stock, will
  indirectly own 75.2 percent of the Company's Common Stock representing 93.8
   percent of the combined voting power of all classes of voting stock of the
      Company (or 72.5 percent and 93.0 percent, respectively, if the U.S.
 Underwriters exercise their over-allotment option in full and the shares sold
      pursuant to the over-allotment option are sold only by the Company).
Accordingly, DuPont will continue to control the Company. DuPont has advised the
 Company that DuPont intends to offer its remaining Conoco shares in a tax-free
  split-off expected to be completed within 12 months of the date hereof. See
   "Prospectus Summary -- Separation From DuPont," "Arrangements between the
                Company and DuPont" and "Principal Stockholder."
    
                            ------------------------
  The Class A Common Stock has been approved for listing on the New York Stock
Exchange ("NYSE") under the trading symbol "CLL," subject to official notice of
                                   issuance.
                            ------------------------
   
   SEE "RISK FACTORS" BEGINNING ON PAGE 16 FOR INFORMATION CONCERNING CERTAIN
          FACTORS THAT SHOULD BE CONSIDERED BY PROSPECTIVE INVESTORS.
    
                            ------------------------
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE
     SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES
        COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS
        PROSPECTUS. ANY REPRESENTATION                       TO THE
                        CONTRARY IS A CRIMINAL OFFENSE.
 
                            ------------------------
 
                             PRICE $        A SHARE
 
                            ------------------------
 
<TABLE>
<CAPTION>
                                                                    PRICE TO        UNDERWRITING DISCOUNTS        PROCEEDS TO
                                                                     PUBLIC           AND COMMISSIONS(1)          COMPANY(2)
                                                                    --------        ----------------------        -----------
<S>                                                                 <C>             <C>                           <C>
Per Share...................................................              $                      $                         $
Total(3)....................................................              $                      $                         $
</TABLE>
 
- ---------------
    (1) The Company has agreed to indemnify the Underwriters against certain
        liabilities, including liabilities under the Securities Act of 1933, as
        amended. See "Underwriters."
 
   
    (2) Before deducting expenses payable by the Company, estimated at $20
        million.
    
 
   
    (3) The U.S. Underwriters have been granted an option, exercisable within 30
        days of the date hereof, to purchase up to an aggregate of 22,500,000
        additional shares of Class A Common Stock at the price to public shown
        above less underwriting discounts and commissions for the purpose of
        covering over-allotments, if any. If the U.S. Underwriters exercise such
        option in full, the total price to public and the underwriting discounts
        and commissions will be $        and $        , respectively. The
        additional shares to be sold under this option may, at the discretion of
        DuPont, be sold either by the Company or DuPont or a combination of the
        Company and DuPont. If the U.S. Underwriters exercise such option in
        full, and the shares are sold only by the Company, the proceeds to the
        Company will be $        . If such shares are sold only by DuPont, the
        Company will not receive any of the proceeds from the sale of such
        shares by DuPont. The actual option granted by the Company and/or DuPont
        will be described in the final prospectus. See "Underwriters."
    
                            ------------------------
    The Class A Common Stock is offered, subject to prior sale, when, as, and if
accepted by the Underwriters named herein and, subject to approval of certain
legal matters by Cravath, Swaine & Moore, counsel for the Underwriters, and to
certain other conditions. It is expected that delivery of the Class A Common
Stock will be made on or about             , 1998 at the offices of Morgan
Stanley & Co. Incorporated, New York, New York, against payment therefor in
immediately available funds.
 
                            ------------------------
 
MORGAN STANLEY DEAN WITTER
               CREDIT SUISSE FIRST BOSTON
                               GOLDMAN SACHS INTERNATIONAL
                                           MERRILL LYNCH INTERNATIONAL
J.P. MORGAN SECURITIES LTD.                   SALOMON SMITH BARNEY INTERNATIONAL
 
BT ALEX. BROWN INTERNATIONAL                                           SCHRODERS
 
               , 1998
<PAGE>   183
 
                                    PART II
 
                     INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 13. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION
 
     Set forth below is a table of the registration fee for the Securities and
Exchange Commission, the filing fee for the National Association of Securities
Dealers, Inc., the listing fee for the New York Stock Exchange and estimates of
all other expenses to be incurred in connection with the issuance and
distribution of the securities described in this Registration Statement, other
than underwriting discounts and commissions:
 
   
<TABLE>
<S>                                                            <C>
SEC registration fee........................................   $1,284,556
NASD filing fee.............................................       30,500
NYSE listing fee............................................       *
Blue sky fees and expenses..................................       *
Printing expenses...........................................       *
Legal fees and expenses.....................................       *
Accounting fees and expenses................................       *
Transfer agent and registrar fees...........................       *
Miscellaneous...............................................       *
                                                               ----------
          Total.............................................   $   *
                                                               ==========
</TABLE>
    
 
- ---------------
* To follow by amendment
 
ITEM 14. INDEMNIFICATION OF DIRECTORS AND OFFICERS
 
   
     Section 145 of the Delaware General Corporation Law provides that a
corporation may indemnify directors and officers as well as other employees and
individuals against expenses (including attorneys' fees), judgments, fines and
amounts paid in settlement in connection with specified actions, suits or
proceedings, whether civil, criminal, administrative or investigative (other
than an action by or in the right of the corporation -- a "derivative action"),
if they acted in good faith and in a manner they reasonably believed to be in or
not opposed to the best interests of the corporation, and, with respect to any
criminal action or proceeding, had no reasonable cause to believe their conduct
was unlawful. A similar standard is applicable in the case of derivative
actions, except that indemnification only extends to expenses (including
attorneys' fees) incurred in connection with the defense or settlement of such
action, and the statute required court approval before there can be any
indemnification where the person seeking indemnification has been found liable
to the corporation. The statute provides that it is not exclusive of other
indemnification that may be granted by a corporation's charter, By-laws,
disinterested director vote, stockholder vote, agreement or otherwise.
    
 
     Section 102(b)(7) of the Delaware General Corporation Law permits a
corporation to provide in its certificate of incorporation that a director of
the corporation shall not be personably liable to the corporation or its
stockholders for monetary damages for breach of fiduciary duty as a director,
except for liability (i) for any breach of the director's duty of loyalty to the
corporation or its stockholders, (ii) for acts or omissions not in good faith or
which involve intentional misconduct or a knowing violation of law, (iii) for
payments of unlawful dividends or unlawful stock repurchases or redemptions, or
(iv) for any transaction from which the director derived an improper personal
benefit.
 
   
     Article 5E(2) of the Registrant's Certificate of Incorporation provides
that no director shall be personally liable to the Company or any of its
stockholders for monetary damages for breach of fiduciary duty as a director,
except for liability (i) for any breach of the director's duty of loyalty to the
Company or its stockholders, (ii) for acts or omissions not in good faith or
which involve intentional misconduct or a knowing violation of law, (iii)
pursuant to section 174 of the Delaware General Corporation Law or (iv) for any
transaction from which the director derived an improper personal benefit. Any
repeal or modification of such Article 5E(2) shall not adversely affect any
right or protection of a director of the Registrant for or with respect to any
acts or omissions of such director occurring prior to such amendment or repeal.
The Company's By-laws provide for indemnification of directors and officers to
the maximum extent permitted by Delaware law.
    
                                      II-1
<PAGE>   184
 
ITEM 15. RECENT SALES OF UNREGISTERED SECURITIES
 
     Not applicable.
 
ITEM 16. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
 
     (a) Exhibits:
 
   
<TABLE>
<CAPTION>
        EXHIBIT
          NO.                                    DESCRIPTION
        -------                                  -----------
<C>                      <S>
           1.1           -- Form of Underwriting Agreement*
           3.1           -- Certificate of Incorporation****
           3.2           -- By-laws of the Company**
           4.1           -- Specimen Certificate for shares of Class A Common Stock
                            of the Registrant**
           4.2           -- Specimen Certificate for shares of Class B Common Stock
                            of the Registrant**
           4.3           -- Preferred Share Purchase Rights Agreement**
           4.4           -- Promissory Note and Guaranty to DuPont Energy Company**
           4.5           -- Promissory Note to DuPont Chemical and Energy Operations
                            Inc. (Norway)***
           4.6           -- Promissory Note to DuPont Chemical and Energy Operations
                            Inc. (United Kingdom and Poland)**
           4.7           -- Promissory Note to DuPont Energy Company***
           4.8           -- Revolving Credit Agreement*
           5.1           -- Opinion as to the legality of the Class A Common Stock
                            being offered**
          10.1           -- Restructuring, Transfer and Separation Agreement between
                            DuPont and Conoco*
          10.2           -- Tax Sharing Agreements between DuPont and Conoco*
          10.3           -- Employee Matters Agreement between DuPont and Conoco***
          10.4           -- Information Systems and Telecommunications Carrier
                            Transitional Services and Facilities Lease Agreement
                            between DuPont and Conoco***
          10.5           -- Transitional Services Agreement between DuPont and the
                            Company**
          10.6           -- Registration Rights Agreement between DuPont and Conoco*
          10.7           -- Natural Gas Supply Agreement between DuPont and Conoco**
          10.8           -- Severance Agreement, dated May 10, 1998, between Conoco
                            and Archie W. Dunham**
          10.9           -- 1998 Stock and Performance Incentive Plan**
          10.10          -- 1998 Key Employee Stock Performance Plan**
          10.11          -- Humber DME Agreement***
          10.12          -- Deferred Compensation Plan for Nonemployee Directors**
          10.13          -- Conoco Inc. Key Employee Severance Plan**
          10.14          -- Conoco Inc. Key Employee Temporary Severance Plan**
          10.15          -- Conoco Salary Deferral & Savings Restoration Plan***
          10.16          -- Directors' Charitable Gift Plan**
          10.17          -- Motor Carrier Contract between Sentinel and Conoco**
          10.18          -- Mount Belvieu Agreements***
          11.1           -- Statement regarding computation of per share earnings*
          15             -- Awareness Letter of PricewaterhouseCoopers LLP***
          21.1           -- List of Principal Subsidiaries of the Registrant***
          23.1           -- Consent of PricewaterhouseCoopers LLP***
          23.2           -- Consent of DeGolyer and MacNaughton***
          24             -- Power of Attorney**
          27             -- Financial Data Schedule**
          99             -- Consents of Proposed Directors**
          99.1           -- Consent of Solomon Associates***
</TABLE>
    
 
- ---------------
 
   * To follow by amendment
 
  ** Filed previously
 
 *** Filed herein
 
   
**** Revised version filed herein
    
 
                                      II-2
<PAGE>   185
 
     (b) Financial Data Schedules:
 
        The following financial statement schedules are filed herewith:
 
           Summary Financial Information -- Balance Sheet and Income Statement
               at December 31, 1997
 
           Summary Financial Information -- Balance Sheet and Income Statement
               at June 30, 1998
 
          Schedules have been omitted because the information required to be set
     forth therein is either not applicable or is shown in the financial
     statements or notes thereto.
 
ITEM 17. UNDERTAKINGS
 
     Insofar as indemnification for liabilities arising under the Securities Act
of 1933 may be permitted to directors, officers and controlling persons of the
Registrant pursuant to the foregoing provisions, or otherwise, the Registrant
has been advised that in the opinion of the Securities and Exchange Commission
such indemnification is against public policy as expressed in the Securities Act
and is, therefore, unenforceable. In the event that a claim for indemnification
against such liabilities (other than the payment by the Registrant of expenses
incurred or paid by a director, officer or controlling person of the Registrant
in the successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Securities Act and will be governed by the final
adjudication of such issue.
 
     The undersigned Registrant hereby undertakes that:
 
          (1) For purposes of determining any liability under the Securities
     Act, the information omitted from the form of prospectus filed as part of a
     registration statement in reliance upon Rule 430A and contained in the form
     of prospectus filed by the Registrant pursuant to Rule 424(b)(1) or (4) or
     497(h) under the Securities Act shall be deemed to be part of the
     registration statement as of the time it was declared effective.
 
          (2) For the purpose of determining any liability under the Securities
     Act, each post-effective amendment that contains a form of prospectus shall
     be deemed to be a new registration statement relating to the securities
     offered therein, and the offering of such securities at that time shall be
     deemed to be the initial bona fide offering thereof.
 
          (3) It will provide to the underwriters at the closing specified in
     the underwriting agreement, certificates in such denominations and
     registered in such names as required by the underwriters to permit prompt
     delivery to each purchaser.
 
                                      II-3
<PAGE>   186
 
                                   SIGNATURES
 
   
     Pursuant to the requirements of the Securities Act of 1933, as amended, the
Registrant has duly caused this Registration Statement to be signed on its
behalf by the undersigned, thereunto duly authorized, in the City of Houston,
State of Texas, on September 28, 1998.
    
 
                                            CONOCO INC.
 
                                            By:    /s/ ARCHIE W. DUNHAM
                                              ----------------------------------
                                              Name: Archie W. Dunham
                                              Title: President and Chief
                                                Executive Officer
 
   
     Pursuant to the requirements of the Securities Act of 1933, this Amendment
No. 3 to the Registration Statement has been signed below by the following
persons in the capacities indicated on September 28, 1998.
    
 
<TABLE>
<CAPTION>
                      SIGNATURE                                            TITLE
                      ---------                                            -----
<C>                                                    <S>
                /s/ ARCHIE W. DUNHAM                   President, Chief Executive Officer and
- -----------------------------------------------------    Director
                  Archie W. Dunham
 
                /s/ ROBERT W. GOLDMAN                  Senior Vice President, Finance, and Chief
- -----------------------------------------------------    Financial Officer (Principal Financial
                  Robert W. Goldman                      Officer and Principal Accounting Officer)
 
                          *                            Chairman of the Board and Director
- -----------------------------------------------------
                Edgar S. Woolard, Jr.
 
                          *                            Director
- -----------------------------------------------------
                  Gary M. Pfeiffer
 
             *By: /s/ ROBERT W. GOLDMAN
  ------------------------------------------------
                  Robert W. Goldman
                  Attorney-in-Fact
</TABLE>
 
                                      II-4
<PAGE>   187
 
                                 EXHIBIT INDEX
 
   
<TABLE>
<CAPTION>
        EXHIBIT
          NO.                                    DESCRIPTION
        -------                                  -----------
<C>                      <S>
 
           1.1           -- Form of Underwriting Agreement*
           3.1           -- Certificate of Incorporation****
           3.2           -- By-laws of the Company**
           4.1           -- Specimen Certificate for shares of Class A Common Stock
                            of the Registrant**
           4.2           -- Specimen Certificate for shares of Class B Common Stock
                            of the Registrant**
           4.3           -- Preferred Share Purchase Rights Agreement**
           4.4           -- Promissory Note and Guaranty to DuPont Energy Company**
           4.5           -- Promissory Note to DuPont Chemical and Energy Operations
                            Inc. (Norway)***
           4.6           -- Promissory Note to DuPont Chemical and Energy Operations
                            Inc. (United Kingdom and Poland)**
           4.7           -- Promissory Note to DuPont Energy Company***
           4.8           -- Revolving Credit Agreement*
           5.1           -- Opinion as to the legality of the Class A Common Stock
                            being offered**
          10.1           -- Restructuring, Transfer and Separation Agreement between
                            DuPont and Conoco*
          10.2           -- Tax Sharing Agreements between DuPont and Conoco*
          10.3           -- Employee Matters Agreement between DuPont and Conoco***
          10.4           -- Information Systems and Telecommunications Carrier
                            Transitional Services and Facilities Lease Agreement
                            between DuPont and Conoco***
          10.5           -- Transitional Services Agreement between DuPont and the
                            Company**
          10.6           -- Registration Rights Agreement between DuPont and Conoco*
          10.7           -- Natural Gas Supply Agreement between DuPont and Conoco**
          10.8           -- Severance Agreement, dated May 10, 1998, between Conoco
                            and Archie W. Dunham**
          10.9           -- 1998 Stock and Performance Incentive Plan**
          10.10          -- 1998 Key Employee Stock Performance Plan**
          10.11          -- Humber DME Agreement***
          10.12          -- Deferred Compensation Plan for Nonemployee Directors**
          10.13          -- Conoco Inc. Key Employee Severance Plan**
          10.14          -- Conoco Inc. Key Employee Temporary Severance Plan**
          10.15          -- Conoco Salary Deferral & Savings Restoration Plan***
          10.16          -- Directors' Charitable Gift Plan**
          10.17          -- Motor Carrier Contract between Sentinel and Conoco**
          10.18          -- Mount Belvieu Agreements***
          11.1           -- Statement regarding computation of per share earnings*
          15             -- Awareness Letter of PricewaterhouseCoopers LLP***
          21.1           -- List of Principal Subsidiaries of the Registrant***
          23.1           -- Consent of PricewaterhouseCoopers LLP***
          23.2           -- Consent of DeGolyer and MacNaughton***
          24             -- Power of Attorney**
          27             -- Financial Data Schedule**
          99             -- Consents of Proposed Directors**
          99.1           -- Consent of Solomon Associates***
</TABLE>
    
 
- ---------------
 
   * To follow by amendment
 
  ** Filed previously
 
 *** Filed herein
 
   
**** Revised version filed herein
    

<PAGE>   1
                                                                     EXHIBIT 3.1



                                    RESTATED

                          CERTIFICATE OF INCORPORATION

                                       OF

                                   CONOCO INC.

                     (ORIGINALLY INCORPORATED UNDER THE NAME

                  "CONOCO ENERGY COMPANY" on November 2, 1995)


                  FIRST: The name of the Corporation is Conoco
Inc. (hereinafter the "Corporation").

                  SECOND: The address of the registered office of the
Corporation in the State of Delaware is 1209 Orange Street, in the City of
Wilmington, County of New Castle. The name of its registered agent at that
address is The Corporation Trust Company.

                  THIRD: The purpose of the Corporation is to engage in any
lawful act or activity for which a corporation may be organized under the
General Corporation Law of the State of Delaware as set forth in Title 8 of the
Delaware Code (the "GCL").

                  FOURTH: A. The total number of shares of stock that the
Corporation shall have authority to issue is 4,850,000,000 of which (i)
3,000,000,000 shares shall be shares of Class A Common Stock, par value $.01 per
share (the "Class A Common Stock"), and 1,600,000,000 shares shall be shares of
Class B Common Stock, par value $.0l per share (the "Class B Common Stock") (the
Class A Common Stock and the Class B Common Stock being collectively referred to
herein as the "Common Stock"), and (ii) 250,000,000 shares shall be shares of
Preferred Stock, par value $.0l per share (the "Preferred Stock").

         B. Preferred Stock The Board of Directors is expressly authorized to
provide for the issuance of all or any shares of the Preferred Stock in one or
more classes or series, and to fix for each such class or series the voting
powers (if any) and such distinctive designations, preferences and relative,
participating, optional or other special rights and such qualifications,
limitations or restrictions thereof, as shall be stated




<PAGE>   2



and expressed in the resolution or resolutions adopted by the Board of Directors
providing for the issuance of such class or series and as may be permitted by
the GCL, including, without limitation, the authority to provide that any such
class or series may be (i) subject to redemption at such time or times and at
such price or prices; (ii) entitled to receive dividends (which may be
cumulative or non-cumulative) at such rates, on such conditions, and at such
times, and payable in preference to, or in such relation to, the dividends
payable on any other class or classes or any other series; (iii) entitled to
such rights upon the dissolution of, or upon any distribution of the assets of,
the Corporation; or (iv) convertible into, or exchangeable for, shares of any
other class or classes of stock, or of any other series of the same or any other
class or classes of stock, of the Corporation at such price or prices or at such
rates of exchange and with such adjustments; all as may be stated in such
resolution or resolutions.

         C. Common Stock The following is a statement of the relative powers,
preferences and participating, optional or other special rights, and the
qualifications, limitations and restrictions of the Class A Common Stock and
Class B Common Stock of the Corporation:

            (1) Except as otherwise set forth below in this Article FOURTH, the 
relative powers, preferences and participating, optional or other special
rights, and the qualifications, limitations or restrictions of the Class A
Common Stock and Class B Common Stock shall be identical in all respects.

            (2) Subject to the rights of the holders of Preferred Stock, and 
subject to any other provisions of this Certificate of Incorporation, holders of
Class A Common Stock and Class B Common Stock shall be entitled to receive such
dividends and other distributions in cash, stock of any corporation (other than
Common Stock of the Corporation) or property of the Corporation as may be
declared thereon by the Board of Directors from time to time out of assets or
funds of the Corporation legally available therefor and shall share equally on a
per share basis in all such dividends and other distributions. In the case of
dividends or other distributions payable in Common Stock, including
distributions pursuant to stock splits or divisions of Common Stock of the
Corporation, 



                                       2
<PAGE>   3


only shares of Class A Common Stock shall be paid or distributed with respect to
Class A Common Stock and only shares of Class B Common Stock shall be paid or
distributed with respect to Class B Common Stock. The number of shares of Class
A Common Stock and Class B Common Stock so distributed on each share shall be
equal in number. Neither the shares of Class A Common Stock nor the shares of
Class B Common Stock may be reclassified, subdivided or combined unless such
reclassification, subdivision or combination occurs simultaneously and in the
same proportion for each class.

            (3) (a) At every meeting of the stockholders of the Corporation 
every holder of Class A Common Stock shall be entitled to one vote in person or
by proxy for each share of Class A Common Stock standing in his or her name on
the transfer books of the Corporation, and every holder of Class B Common Stock
shall be entitled to five votes in person or by proxy for each share of Class B
Common Stock standing in his or her name on the transfer books of the
Corporation in connection with the election of directors and all other matters
submitted to a vote of stockholders. Except as may be otherwise required by law
or by this Certificate of Incorporation, the holders of Class A Common Stock and
Class B Common Stock shall vote together as a single class and their votes shall
be counted and totaled together, subject to any voting rights which may be
granted to holders of Preferred Stock, on all matters submitted to a vote of
stockholders of the Corporation. Notwithstanding any other provision of this
Certificate of Incorporation to the contrary, holders of Class A Common Stock
shall not be eligible to vote on any alteration or change in the powers, 
preferences, or special rights of the Class B Common Stock that would not
adversely affect the rights of the Class A Common Stock; provided that, for the
foregoing purposes, any provision for the voluntary, mandatory or other
conversion or exchange of the Class B Common Stock into or for Class A Common
Stock on a one for one basis shall be deemed not to adversely affect the rights
of the Class A Common Stock.

                (b) Except as otherwise provided by law, and subject to any 
rights of the holders of Preferred Stock, the provisions of this Certificate of
Incorporation shall not be modified, revised, altered or amended, repealed or
rescinded in whole or in part, without the 



                                       3
<PAGE>   4



approval of a majority of the votes entitled to be cast by the holders of the
Class A Common Stock and the Class B Common Stock, voting together as a single
class (except as otherwise provided in paragraph (C)(3)(a) above); provided,
however, that with respect to any proposed amendment of this Certificate of
Incorporation which would alter or change the powers, preferences or special
rights of the shares of Class A Common Stock or Class B Common Stock so as to
affect them adversely, the approval of a majority of the votes entitled to be
cast by the holders of the shares affected by the proposed amendment, voting
separately as a class, shall be obtained in addition to the approval of a
majority of the votes entitled to be cast by the holders of the Class A Common
Stock and the Class B Common Stock voting together as a single class as
hereinbefore provided. The affirmative vote of shares representing (x) not less
than 66 2/3% (or, from and after the Second Trigger Date (as defined in
paragraph (C) of Article FIFTH), 80%) of the votes entitled to be cast by the
Voting Stock and (y) in addition, from and after the First Trigger Date (as
defined in paragraph (C) of Article FIFTH) (if there are at such time any shares
of Class B Common Stock outstanding), a majority of the votes entitled to be
cast by the holders of each class of Common Stock, voting separately by class,
shall be required to alter, amend or adopt any provision inconsistent with or
repeal Article FIFTH or Article EIGHTH or any provision of this paragraph
(C)(3)(b). "Voting Stock" shall mean the then outstanding shares of capital
stock entitled to vote generally on the election of directors and shall exclude
any class or series of capital stock only entitled to vote in the event of
dividend arrearages thereon, whether or not at the time of determination there
are any such dividend arrearages. To the fullest extent permitted by law, any
increase in the authorized number of shares of any class or classes of stock of
the Corporation or creation, authorization or issuance of any securities
convertible into, or warrants, options or similar rights to purchase, acquire or
receive, shares of any such class or classes of stock shall be deemed not to
affect adversely the powers, preferences or special rights of the shares of
Class A Common Stock or Class B Common Stock.

                (c) Every reference in this Certificate of Incorporation to a 
majority or other proportion of shares, or a majority or other proportion of the
votes of 



                                       4
<PAGE>   5


shares, of Voting Stock, Common Stock, Class A Common Stock, or Class B Common
Stock shall refer to such majority or other proportion of the votes to which
such shares of Voting Stock, Common Stock, Class A Common Stock or Class B
Common Stock are entitled.

                (d) At any meeting of stockholders, the presence in person or by
proxy of the holders of shares entitled to cast a majority of all the votes
which could be cast at such meeting by the holders of all of the outstanding
shares of stock of the Corporation entitled to vote on every matter that is to
be voted on at such meeting shall constitute a quorum.

            (4) In the event of any dissolution, liquidation or winding up of 
the affairs of the Corporation, whether voluntary or involuntary, after payment
in full of the amounts required to be paid to the holders of Preferred Stock,
the remaining assets and funds of the Corporation shall be distributed pro rata
to the holders of Common Stock, and the holders of Class A Common Stock and the
holders of Class B Common Stock will be entitled to receive the same amount per
share in respect thereof. For purposes of this paragraph (C)(4), the voluntary
sale, conveyance, lease, exchange or transfer (for cash, shares of stock,
securities or other consideration) of all or substantially all of the assets of
the Corporation or a consolidation or merger of the Corporation with one or more
other corporations (whether or not the Corporation is the corporation surviving
such consolidation or merger) shall not be deemed to be a liquidation, 
dissolution or winding up, voluntary or involuntary.

            (5) Except as shall otherwise be approved by a majority of the votes
entitled to be cast by the holders of each class of Common Stock voting
separately as a class, in case of any reorganization or any consolidation of the
Corporation with one or more other corporations or a merger of the Corporation
with another corporation in which shares of Class A Common Stock or Class B
Common Stock are converted into (or entitled to receive with respect thereto)
shares of stock and/or other securities or property (including cash), each
holder of a share of Class A Common Stock shall be entitled to receive with
respect to such share the same kind and amount of shares of stock and other
securities and property (including cash) receivable upon such reorganization,
consolidation 



                                       5
<PAGE>   6


or merger by a holder of a share of Class B Common Stock and each holder of a
share of Class B Common Stock shall be entitled to receive with respect to such
share the same kind and amount of shares of stock and other securities and
property (including cash) receivable upon such reorganization, consolidation or
merger by a holder of a share of Class A Common Stock. In the event that the
holders of Class A Common Stock (or of Class B Common Stock) are granted rights
to elect to receive one of two or more alternative forms of consideration, the
foregoing provision shall be deemed satisfied if holders of Class A Common Stock
and holders of Class B Common Stock are granted substantially identical election
rights.

            (6) (a) Prior to the date on which shares of Class B Common
Stock are transferred to stockholders of the DuPont Company in a Tax-Free
Spin-Off (as defined in paragraph (C)(6)(b) below), each record holder of shares
of Class B Common Stock may convert any or all of such shares into an equal
number of shares of Class A Common Stock by surrendering the certificates for
such shares, accompanied by any payment required for documentary, stamp or
similar issue or transfer taxes and by a written notice by such record holder to
the Corporation stating that such record holder desires to convert such shares
of Class B Common Stock into the same number of shares of Class A Common Stock
including for the purpose of the sale or other disposition of such shares of
Class A Common Stock, and requesting that the Corporation issue all of such
shares of Class A Common Stock to persons named therein, setting forth the
number of shares of Class A Common Stock to be issued to each such person and
the denominations in which the certificates therefor are to be issued. To the
extent permitted by law, such voluntary conversion shall be deemed to have been
effected at the close of business on the date of such surrender. Following a
Tax-Free Spin-Off, shares of Class B Common Stock shall no longer be convertible
into shares of Class A Common Stock.

                (b) Prior to a Tax-Free Spin-Off, each share of Class B Common 
Stock shall automatically be converted into one share of Class A Common Stock
upon the transfer of such share if, after such transfer, such share is not
beneficially owned by DuPont. Shares of Class B Common stock shall not convert
into shares of Class A Common Stock (i) in any transfer effected in 



                                       6
<PAGE>   7


connection with a distribution of Class B Common Stock to  security holders of
the DuPont Company in a transaction (including any distribution in exchange for
shares of capital stock or securities of the DuPont Company) in tended to
qualify as a tax-free distribution under Section 355 of the Internal Revenue
Code of 1986, as amended (the "Code"), or any successor provision (a "Tax-Free
Spin-Off") or (ii) in any transfer after a Tax-Free Spin- Off. For purposes of
this paragraph (C)(6), a Tax-Free Spin-Off shall be deemed to have occurred at
the time shares are first transferred to stockholders of the DuPont Company
following receipt of an affidavit described in clause (iii) of the first
sentence of paragraph (C)(6)(d) below. For purposes of this paragraph (C)(6),
each reference to a "person" shall be deemed to include not only a natural
person, but also a corporation, partnership, joint venture, association, or
legal entity of any kind; each reference to a "natural person" (or to a "record
holder" of shares, if a natural person) shall be deemed to include in his or her
representative capacity a guardian, committee, executor, administrator or other
legal representative of such natural person or record holder.

         For purposes of this Certificate of Incorporation:

                  1.       The "DuPont Company" shall mean E.I. du Pont de
                           Nemours & Company, Inc., a Delaware corporation, and
                           all its successors by way of merger, consolidation or
                           sale of all or substantially all of its assets;

                  2.       The term "subsidiary" shall mean, as to any person or
                           entity, a corporation, part ownership, joint venture,
                           association or other entity in which such person or
                           entity beneficially owns (directly or indirectly) 50%
                           or more of the outstanding voting stock, voting
                           power, partnership interests or similar voting
                           interests;

                  3.       "DuPont" shall mean the DuPont Company and all its
                           subsidiaries, but shall not include the Corporation
                           and its subsidiaries; and



                                       7
<PAGE>   8

                  4.       "affiliate" and "beneficial ownership" shall have the
                           respective meanings given to such terms in Rule 13d-3
                           promulgated under the Securities Exchange Act of
                           1934, as amended.

                  Each share of Class B Common Stock shall automatically be
converted into one share of Class A Common Stock on the date on which the
outstanding shares of Class B Common Stock owned by DuPont represent less than
50% of the aggregate number of shares of the then out standing Common Stock,
provided that a Tax-Free Spin-Off has not occurred. For the avoidance of doubt,
paragraph (C)(3)(c) of this Article FOURTH shall not apply to the preceding
sentence.

                  The Corporation will provide notice of any automatic
conversion of all outstanding shares of Class B Common Stock to holders of
record of the Common Stock as soon as practicable following such conversion;
provided, however, that the Corporation may satisfy such notice requirement by
providing such notice prior to such conversion. Such notice shall be provided
by mailing notice of such conversion first class postage prepaid, to each holder
of record of the Common Stock, at such holder's address as it appears on the
transfer books of the Corporation; provided, however, that no failure to give
such notice nor any defect therein shall affect the validity of the automatic
conversion of any shares of Class B Common Stock. Each such notice shall state,
as appropriate, the following:

                                    (i) the automatic conversion date;

                                    (ii) that all outstanding shares of Class B
                           Common Stock are automatically converted;

                                    (iii) the place or places where certificates
                           for such shares may be surrendered in exchange for
                           certificates representing Class A Common
                           Stock.

                  Immediately upon such conversion, the rights of the holders of
shares of Class B Common Stock as such 



                                       8
<PAGE>   9


shall cease and such holders shall be treated for all purposes as having become
the record owners of the shares of Class A Common Stock issuable upon such
conversion; provided, however, that such persons shall be entitled to receive
when paid any dividends declared on the Class B Common Stock as of a record date
preceding the time of such conversion and unpaid as of the time of such 
conversion, subject to paragraph (C)(6)(f) below.

                           (c) Prior to a Tax-Free Spin-Off, holders of shares 
of Class B Common Stock may (i) sell or other wise dispose of or transfer any or
all of such shares held by them, respectively, only in connection with a
transfer which meets the qualifications of paragraph (C)(6)(d) below, and under
no other circumstances, or (ii) convert any or all of such shares into shares of
Class A Common Stock, including for the purpose of effecting the sale or
disposition of such shares of Class A Common Stock to any person as provided in
paragraph (C)(6)(a) above. Prior to a Tax-Free Spin-Off, no one other than those
persons in whose names shares of Class B Common Stock become registered on the
original stock ledger of the Corporation by reason of their record ownership of
shares of common stock of the Corporation which are reclassified into shares of
Class B Common Stock as provided in paragraph (C)(6)(l) below, or transferees
or successive transferees who receive shares of Class B Common Stock in
connection with a transfer which meets the qualifications set forth in paragraph
(C)(6)(d) below, shall by virtue of the acquisition of a certificate for shares
of Class B Common Stock have the status of an owner or holder of shares of Class
B Common Stock or be recognized as such by the Corporation or be other wise
entitled to enjoy for his or her own benefit the special rights and powers of a
holder of shares of Class B Common Stock.

                  Holders of shares of Class B Common Stock may at any and all
times transfer to any person the shares of Class A Common Stock issuable upon
conversion of such shares of Class B Common Stock.

                           (d) Prior to a Tax-Free Spin-Off, shares of Class B 
Common Stock shall be transferred on the books of the Corporation and a new
certificate therefor issued, upon presentation at the office of the Secretary of
the Corporation (or at such additional place or places as may 



                                       9
<PAGE>   10

from time to time be designated by the Secretary or any Assistant Secretary of
the Corporation) of the certificate for such shares, in proper form for transfer
and accompanied by all requisite stock transfer tax stamps, only if such
certificate when so presented shall also be accompanied by any one of the
following:

                                    (i) an affidavit from the DuPont Company
                           stating that such certificate is being presented to
                           effect a transfer by the DuPont Company of such
                           shares to a subsidiary of the DuPont Company; or

                                    (ii) an affidavit from the DuPont Company
                           stating that such certificate is being presented to
                           effect a transfer by any subsidiary of the DuPont
                           Company of such shares to the DuPont Company or
                           another subsidiary of the DuPont Company; or

                                    (iii) an affidavit from the DuPont Company
                           stating that such certificate is being presented to
                           effect a transfer by the DuPont Company of such
                           shares to the stockholders of the DuPont Company in
                           connection with a Tax-Free Spin-Off.

                  Each affidavit of a record holder furnished pursuant to this
paragraph (C)(6)(d) shall be verified as of a date not earlier than five days
prior to the date of delivery thereof, and, where such record holder is a
corporation or partnership, shall be verified by an officer of the corporation
or by a general partner of the partnership, as the case may be.

                  If a record holder of shares of Class B Common Stock shall
deliver a certificate for such shares, endorsed by him or her for transfer or
accompanied by an instrument of transfer signed by him or her, to a person who
receives such shares in connection with a transfer which does not meet the
qualifications set forth in this paragraph (C)(6)(d), then such person or any
successive transferee of such certificate may treat such endorsement or
instrument as authorizing him or her on behalf of such 



                                       10
<PAGE>   11


record holder to convert such shares in the manner above provided for the
purpose of the transfer to himself or herself of the shares of Class A Common
Stock issuable upon such conversion, and to give on behalf of such record holder
the written notice of conversion above required, and may convert such shares of
Class B Common Stock accordingly.

                  If such shares of Class B Common Stock shall improperly have
been registered in the name of a person not meeting the qualifications set forth
in this paragraph (C)(6)(d)(or in the name of any successive transferee of
such certificate) and a new certificate therefor issued, such person or
transferee shall surrender such new certificate for cancellation, accompanied by
the written notice of conversion above required, in which case (A) such person
or transferee shall be deemed to have elected to treat the endorsement on (or
instrument of transfer accompanying) the certificate so delivered by such former
record holder as authorizing such person or transferee on behalf of such former
record holder so to convert such shares and so to give such notice, (B) the
shares of Class B Common Stock registered in the name of such former record
holder shall be deemed to have been surrendered for conversion for the purpose
of the transfer to such person or transferee of the shares of Class A Common
Stock issuable upon conversion, and (C) the appropriate entries shall be made
on the books of the Corporation to reflect such action.

                  In the event that the Board of Directors of the Corporation
(or any committee of the Board of Directors, or any officer of the Corporation,
designated for the purpose by the Board of Directors) shall determine, upon the
basis of facts not disclosed in any affidavit or other document accompanying the
certificate for shares of Class B Common Stock when presented for transfer, that
such shares of Class B Common Stock have been registered in violation of the
provisions of paragraph (C)(6), or shall determine that a person is enjoying for
his or her own benefit the special rights and powers of shares of Class B Common
Stock in violation of such provisions, then the Corporation shall take such
action at law or in equity as is appropriate under the circumstances. An
unforeclosed pledge made to secure a bona fide obligation shall not be deemed to
violate such provisions. Prior to the occurrence of a Tax-Free Spin-Off, no
transfer of 



                                       11

<PAGE>   12

title to shares of Class B Common Stock to a pledgee or other person (other than
DuPont) may occur without compliance with the foregoing provisions of this
paragraph (C)(6)(d).

                           (e) Prior to the occurrence of a Tax-Free Spin-Off, 
every certificate for shares of Class B Common Stock shall bear a legend on the
face thereof reading as follows:

         "The shares of Class B Common Stock represented by this certificate may
         not be transferred to any person in connection with a transfer that
         does not meet the qualifications set forth in paragraph (C)(6)(d) of
         Article FOURTH of the Certificate of Incorporation of this corporation
         and no person who receives such shares in connection with a transfer
         which does not meet the qualifications prescribed by paragraph
         (C)(6)(d) of said Article FOURTH is entitled to own or to be registered
         as the record holder of such shares of Class B Common Stock, but the
         record holder of this certificate may at such time and in the manner
         set forth in said Article FOURTH of the Certificate of Incorporation
         convert such shares of Class B Common Stock into the same number of
         shares of Class A Common Stock for purposes of effecting the sale or
         other disposition of such shares of Class A Common Stock to any person.
         Each holder of this certificate, by accepting the same, accepts and
         agrees to all of the foregoing."

                  Upon and after the transfer of shares in a Tax-Free Spin-Off,
shares of Class B Common Stock shall no longer bear the legend set forth above
in this paragraph (C)(6)(e).

                           (f) Upon any conversion of shares of Class B Common 
Stock into shares of Class A Common Stock pursuant to the provisions of this
paragraph (C)(6), any dividend, for which the record date or payment date shall
be subsequent to such conversion, which may have been declared on the shares of
Class B Common Stock so converted shall be deemed to have been declared, and
shall be payable, with respect to the shares of Class A Common Stock into or for
which such shares of Class B Common 



                                       12
<PAGE>   13


Stock shall have been so converted, and any such dividend which shall have been
declared on such shares payable in shares of Class B Common Stock shall be
deemed to have been declared, and shall be payable, in shares of Class A Common
Stock.

                           (g) The Corporation shall not reissue or resell any 
shares of Class B Common Stock which shall have been converted into shares of
Class A Common Stock pursuant to or as permitted by the provisions of this
paragraph (C)(6), or any shares of Class B Common Stock which shall have been
acquired by the Corporation in any other manner. The Corporation shall, from
time to time, take such appropriate action as may be necessary to retire such
shares and to reduce the authorized amount of Class B Common Stock accordingly.

                  The Corporation shall at all times reserve and keep available,
out of its authorized but unissued Common Stock, such number of shares of Class
A Common Stock as would become issuable upon the conversion of all shares of
Class B Common Stock then outstanding.

                           (h) In connection with any transfer or conversion of 
any stock of the Corporation pursuant to or as permitted by the provisions of
this paragraph (c)(6), or in connection with the making of any determination
referred to in this paragraph (c)(6):

                               (i) the Corporation shall be under no obligation 
                           to make any investigation of facts unless an 
                           officer, employee or agent of the Corporation
                           responsible for making such transfer or determination
                           or issuing Class A Common Stock pursuant to such
                           conversion has substantial reason to believe, or
                           unless the Board of Directors (or a committee of the
                           Board of Directors designated for the purpose)
                           determines that there is substantial reason to
                           believe, that any affidavit or other document is
                           incomplete or incorrect in a material respect or
                           that an investigation would disclose facts upon which
                           any determination referred to in para-




                                       13
<PAGE>   14

                           graph (C)(6)(f) above should be made, in either of
                           which events the Corporation shall make or cause to
                           be made such investigation as it may deem necessary
                           or desirable in the circumstances and have a
                           reasonable time to complete such investigation; and

                               (ii) neither the Corporation nor any director, 
                           officer, employee or agent of the Corporation shall
                           be liable in any manner for any action taken or
                           omitted in good faith.

                           (i) The Corporation will not be required to pay any 
documentary, stamp or similar issue or transfer taxes payable in respect of the
issue or delivery of shares of Class A Common Stock on the conversion of shares
of Class B Common Stock pursuant to this paragraph (C)(6), and no such issue or
delivery shall be made unless and until the person requesting such issue has
paid to the Corporation the amount of any such tax or has established, to the
satisfaction of the Corporation, that such tax has been paid.

                           (j) All rights to vote and all voting power 
(including, without limitation thereto, the right to elect directors) shall be
vested exclusively in the holders of Common Stock, voting together as a single
class, except as otherwise expressly provided in this Certificate of
Incorporation, in a Certificate of Designation with respect to any Preferred
Stock or as other wise expressly required by applicable law.

                           (k) No stockholder shall be entitled to exercise any 
right of cumulative voting.

                           (l) Immediately upon the effectiveness of this 
Certificate of Incorporation, each share of common stock of the Corporation
issued and outstanding immediately prior to such effectiveness, shall be
changed into and reclassified as_________shares of Class B Common Stock.

                  FIFTH:  A.  The business and affairs of the Corporation shall 
be managed by or under the direction of a Board of Directors initially
consisting of nine direc-



                                       14
<PAGE>   15


tors, the exact number of directors to be not less than six nor more than
fifteen as determined from time to time by resolution adopted by affirmative
vote of a majority of the entire Board of Directors. The directors shall be
divided into three classes, designated Class I, Class II and Class III. Each
class shall consist, as nearly as may be possible, of one-third of the total
number of directors constituting the entire Board of Directors. Class I
directors shall be elected initially for a one-year term, Class II directors
initially for a two-year term and Class III directors initially for a
three-year term. At each succeeding annual meeting of stockholders beginning in
1999, successors to the class of directors whose term expires at that annual
meeting shall be elected for a three-year term. If the number of directors is
changed, any increase or decrease shall be apportioned among the classes so as
to maintain the number of directors in each class as nearly equal as possible,
and any additional director of any class elected to fill a vacancy resulting
from an increase in such class shall hold office for a term that shall coincide
with the remaining term of that class, but in no case will a decrease in the
number of directors shorten the term of any incumbent director. A director shall
hold office until the annual meeting of the year in which his term expires and
until his successor shall be elected and shall qualify, subject, however, to
prior death, resignation or removal from office. Any vacancy on the Board of
Directors may be filled by a majority of the directors then in office, even if
less than a quorum, or by a sole remaining director or by stockholders if such
vacancy was caused by the action of stockholders (in which event such vacancy
may not be filled by the directors or a majority thereof).

            Any director elected to fill a vacancy not resulting from an
increase in the number of directors shall have the same remaining term as that
of his predecessor.

         B. Any director or the entire Board of Directors may be removed, with
or without cause, by the affirmative vote of shares representing a majority of
the votes entitled to be cast by the Voting Stock; provided, how ever that
during the Trigger Period (as defined in para graph (C) below), a director may
be removed, with or without cause, only by the affirmative vote of shares



                                       15
<PAGE>   16

representing not less than 66 2/3% of the votes entitled to be cast by the
Voting Stock; provided, further, however, that from and after the Second Trigger
Date (as defined in paragraph (C) below), a director may only be removed for
cause, such removal to be by the affirmative vote of the shares representing a
majority of the votes entitled to be cast by the Voting Stock. Unless the Board
of Directors has made a determination that removal is in the best interests of
the Corporation (in which case the following definition shall not apply),
"cause" for removal of a director shall be deemed to exist only if (i) the
director whose removal is proposed has been convicted, or when a director is
granted immunity to testify when another has been convicted, of a felony by a
court of competent jurisdiction and such conviction is no longer subject to
direct appeal; (ii) such director has been found by the affirmative vote of a
majority of the Directors then in office at any regular or special meeting of
the Board of Directors called for that purpose, or by a court of competent
jurisdiction to have been guilty of willful misconduct in the performance of his
duties to the Corporation in a matter of substantial importance to the
Corporation; or (iii) such director has been adjudicated by a court of
competent jurisdiction to be mentally incompetent, which mental incompetency
directly affects his ability as a director of the Corporation. Notwithstanding
the foregoing, whenever holders of outstanding shares of one or more series of
Preferred Stock are entitled to elect directors of the Corporation pursuant to
the provisions applicable in the case of arrearages in the payment of dividends
or other defaults contained in the resolution or resolutions of the Board of
Directors providing for the establishment of any such series, any such director
of the Corporation so elected may be removed in accordance with the provisions
of such resolution or resolutions.

         C. For purposes of this Certificate of Incorporation, "Trigger Period"
shall mean the period that begins on and after the day following the First
Trigger Date and ends on the Second Trigger Date: (i) "First Trigger Date" shall
mean the first date on which DuPont ceases to beneficially own shares
representing 50% or more of the votes entitled to be cast by the Voting Stock
and (ii) "Second Trigger Date" shall mean the first date on which DuPont ceases
to beneficially own shares representing 30% or more of the votes entitled to be
cast by the Voting Stock (First Trigger Date and Second Trigger Date, each a
"Trigger Date").

                                       16


<PAGE>   17




         D. Promptly upon becoming aware of the occurrence of a Trigger Date,
the Corporation shall promptly notify stockholders of such occurrence in any
reasonably practicable manner.

         E. The following provisions are inserted for further definition,
limitation and regulation of the powers of the Corporation and of its directors
and stock holders:

            (1) The By-Laws of the Corporation may be altered, amended or
         repealed and new By-Laws may be adopted (i) by the affirmative vote of
         the shares representing a majority of the votes entitled to be cast by
         the Voting Stock; provided, however, that any proposed alteration,
         amendment or repeal of, or the adoption of any By-Law inconsistent
         with, Sections 3, 7, 10 or 11 of Article II of the By-Laws or Sections
         1, 2 or 11 of Article III (in each case, as in effect on the date
         hereof) of the By-Laws or this sentence, by the stockholders shall
         require the affirmative vote of shares representing (x) not less than
         662/3% (or, from and after the Second Trigger Date, 80%) of the votes
         entitled to be cast by the Voting Stock and (y) in addition, from and
         after the First Trigger Date (if there are any shares of Class B Common
         Stock outstanding), a majority of the votes entitled to be cast by the
         holders of each class of Common Stock, voting separately by class; and
         provided, further, however, that in the case of any such stockholder
         action at a special meeting of stockholders, notice of the proposed
         alteration, amendment, repeal or adoption of the new By-Law or By-Laws
         must be contained in the notice of such special meeting, or (ii) by
         action of the Board of Directors of the Corporation.

            (2) No director shall be personally liable to the Corporation or 
         any of its stockholders for monetary damages for breach of fiduciary
         duty as a director, except for liability 



                                       17
<PAGE>   18
         (i) for any breach of the director's duty of loyalty to the Corporation
         or its stockholders, (ii) for acts or omissions not in good faith or
         which involve intentional misconduct or a knowing violation of law,
         (iii) pursuant to Section 174 of the GCL or (iv) for any transaction
         from which the director derived an improper personal benefit. Any
         repeal or modification of this Article FIFTH by the stockholders of the
         Corporation shall not adversely affect any right or protection of a
         director of the Corporation existing at the time of such repeal or
         modification with respect to acts or omissions occur ring prior to
         such repeal or modification.

            (3) In addition to the powers and authority hereinbefore or by
         statute expressly conferred upon them, the directors are hereby
         empowered to exercise all such powers and do all such acts and things
         as may be exercised or done by the Corporation, subject, nevertheless,
         to the provisions of the GCL, this Certificate of Incorporation, and
         any By-Laws adopted by the stockholders; provided, however, that no
         By-Laws hereafter adopted by the stockholders shall invalidate any
         prior act of the directors which would have been valid if such By-Laws
         had not been adopted.

            (4) So long as DuPont beneficially owns shares representing 10% or
         more of the votes entitled to be cast by the Voting Stock, nominations
         and shareholder proposals by DuPont shall not be subject to the advance
         notice procedures (including the form, content, or timing requirements
         contained therein) of Sections 10 and 11 of Article II of the By-Laws.

                  SIXTH: A. In anticipation that (i) the Corporation will cease
to be a wholly owned subsidiary of the DuPont Company, but that DuPont will
remain a stock holder of the Corporation and have continued contractual,
corporate and business relations with the Corporation, and in anticipation that
the Corporation and DuPont may enter into contracts or otherwise transact
business with each other and that the Corporation may derive benefits therefrom
and (ii) the Corporation may from time to time enter into contractual, corporate
or business relations with one or more of its directors, or one or more
corporations, partnerships, associations or other organizations in which one or
more of its directors have a financial interest (collectively, "Related
Entities"), the provisions of this Article SIXTH are set forth to regulate and
define certain contractual relations of the Corporation as they may involve
DuPont, Related Entities and their respective officers and directors, and the



                                       18
<PAGE>   19

powers, rights, duties and liabilities of the Corporation and its officers,
directors and stockholders in connection therewith. The provisions of this
Article SIXTH are in addition to, and not in limitation of, the provisions of
the GCL and the other provisions of this Certificate of Incorporation. Any
contract or business relation which does not comply with the procedures set
forth in this Article SIXTH shall not by reason thereof be deemed void or
voidable or result in any breach of fiduciary duty or duty of loyalty or failure
to act in good faith or in the best interests of the Corporation or derivation
of any improper personal benefit, but shall be governed by the provisions of
this Certificate of Incorporation, the By-Laws, the GCL and other applicable
law.

         B. No contract, agreement, arrangement or transaction (or any
amendment, modification or termination thereof) between the Corporation and
DuPont or between the Corporation and one or more of the directors or officers
of the Corporation, DuPont or any Related Entity or between the Corporation and
any Related Entity shall be void or voidable solely for the reason that DuPont,
any Related Entity or any one or more of the officers or directors of the
Corporation, DuPont or any Related Entity are parties thereto, or solely because
any such directors or officers are present at or participate in the meeting of
the Board of Directors or committee thereof which authorizes the contract,
agreement, arrangement or transaction (or the amendment, modification or
termination thereof), or solely because his or their votes are counted for such
purpose, and DuPont, any Related Entity and such directors and officers (a)
shall have fully satisfied and fulfilled their fiduciary duties to the
Corporation and its stockholders with respect thereto, (b) shall not be liable
to the Corporation or its stockholders for any breach of fiduciary duty by
reason of the entering into, performance or consummation of any such contract,
agreement, arrangement or transaction (or amendment, modification or
termination thereof), (c) shall be deemed to have acted in good faith and in a
manner such persons reasonably believe to be in and not opposed to the best
interests of the Corporation and (d) shall be deemed not to have breached their
duties of loyalty to the Corporation and its stockholders and not to have
derived in improper personal benefit therefrom, if:



                                       19
<PAGE>   20

                                    (i) the material facts as to the contract, 
                           agreement, arrangement, transaction, amendment,
                           modification or termination are disclosed or are
                           known to the Board of Directors or the committee
                           thereof which authorizes the contract, agreement, 
                           arrangement or transaction (or the amendment,
                           modification or termination thereof), and the Board
                           of Directors or such committee in good faith
                           authorizes the contract, agreement, arrangement or
                           transaction (or the amendment, modification or
                           termination thereof) by the affirmative vote of a
                           majority of the disinterested directors, even though
                           the disinterested directors be less than a quorum;

                                    (ii) the material facts as to the contract,
                           agreement, arrangement or transaction (or the
                           amendment, modification or termination thereof) are
                           disclosed or are known to the holders of Voting Stock
                           entitled to vote thereon, and the contract,
                           agreement, arrangement, or transaction (or the
                           amendment, modification or termination thereof) is
                           specifically approved in good faith by vote of the
                           holders of a majority of the then outstanding Voting
                           Stock not owned by the DuPont Company or a Related
                           Entity, as the case may be; or

                                    (iii) such contract, agreement, arrangement
                           or transaction (or the amendment, modification or
                           termination thereof) is fair as to the Corporation
                           as of the time it is authorized, approved or
                           ratified by the Board of Directors, a committee
                           thereof or the stockholders of the Corporation.




                                       20
<PAGE>   21

         C. Directors of the Corporation who are also directors or officers of 
DuPont or any Related Entity may be counted in determining the presence of a
quorum at a meeting of the Board of Directors or of a committee which authorizes
the contract, agreement, arrangement or transaction (or the amendment,
modification or termination thereof). Voting Stock owned by DuPont and any
Related Entities may be counted in determining the presence of a quorum at a
meeting of stockholders which authorizes the contract, agreement, arrangement or
transaction.

         D. Any person or entity purchasing or otherwise acquiring any interest
in any shares of capital stock of the Corporation will be deemed to have notice
of and to have consented to the provisions of this Article SIXTH.

         E. For purposes of this Article SIXTH, any contract, agreement,
arrangement or transaction (or amendment, modification or termination thereof)
with any corporation, partnership, joint venture, association or other entity in
which the Corporation owns (directly or indirectly) 50% or more of the
outstanding voting stock, voting power, partnership interests or similar
ownership interests, or with any officer or director thereof, shall be deemed to
be a contract, agreement, arrangement or transaction with the Corporation.

            SEVENTH: Meetings of stockholders may be held within or without the 
State of Delaware, as the By-Laws may provide. The books of the Corporation may
be kept (subject to any provision contained in the GCL) outside the State of
Delaware at such place or places as may be designated from time to time by the
Board of Directors or in the By-Laws of the Corporation.

            EIGHTH: Any action required or permitted to be taken by the
stockholders of the Corporation may be effected by a consent in writing by such
holders in accordance with Section 228 of the GCL; provided, however, that on
and after the Second Trigger Date, any action required or permitted to be taken
by the stockholders of the Corporation may be effected only at a duly called
annual or special meeting of such holders and may not be effected by a consent
in writing by such holders in lieu of such a meeting. Effective on and after the
Second Trigger Date, except as otherwise required by law, special meetings of
stockholders of the Corporation for 



                                       21
<PAGE>   22


any purpose or purposes may be called only by the Board of Directors pursuant to
a resolution stating the purpose or purposes thereof or by the Chairman of the
Board of Directors of the Corporation and, effective on and after the Second
Trigger Date, any power of stockholders to call a special meeting is
specifically denied. No business other than that stated in the notice of such
meeting shall be transacted at any special meeting.

             NINTH: A. In addition to any affirmative vote that may be  required
     by law, this Certificate of Incorporation or the By-Laws of the
     Corporation, and except as otherwise expressly provided in paragraph (B) of
     this Article NINTH:

         (i) any merger or consolidation of the Corporation or any subsidiary of
the Corporation with or into (A) any Related Person or (B) any Person that is an
Affiliate of a Related Person; or

         (ii) any sale, lease, exchange, transfer or other disposition by the
Corporation to any Related Person or any Affiliate of any Related Person of all
or substantially all of the assets of the Corporation; or

         (iii) any reclassification of securities (including any reverse stock
split) or recapitalization of the Corporation for which the approval of
shareholders of the Corporation is otherwise required, or any merger,
consolidation or share exchange of the Corporation with any of its subsidiaries
for which the approval of shareholders of the Corporation is otherwise
required, which has the effect, either directly or indirectly, of increasing by
more than 1% the proportionate share of the Class A Common Stock, Class B Common
Stock or Voting Stock Beneficially Owned by any Related Person or any Affiliate
of any Related Person; or

         (iv) any dissolution of the Corporation voluntarily caused or proposed 
     by or on behalf of a Related Person or any Affiliate of any Related Person,

shall require the affirmative vote of shares representing (x) not less than 80%
of the  votes entitled to be cast by the Voting Stock, (y) not less than
66 2/3% of the Voting Stock not Beneficially Owned, directly or indirectly, by
any Related Person, and (z) in addition, from and 


                                       22
<PAGE>   23
after the First Trigger Date, a majority of the votes entitled to be cast by
the holders of each class of Common Stock (excluding all shares Beneficially
Owned, directly or indirectly, by any Related Person), voting separately as a
class, with respect to such Business Combination; provided that, at any time
prior to the Second Trigger Date, the required percentage in clause (x) shall be
66 2/3% and the required percentage in clause (y) shall be 50.01%. Such
affirmative vote shall be required, notwithstanding the fact that no vote may be
required, or that a lesser percentage may be specified, by law, else where in
this Certificate of Incorporation, in the By-laws of the Corporation or in any
agreement with any national securities exchange or otherwise. Notwithstanding
anything to the contrary set forth herein, the provisions of this Article NINTH
shall not be applicable at such time as all shares of Class B Common Stock have
been converted into, or exchanged for, Class A Common Stock.

         B. The provisions of paragraph (A) shall not be applicable to any
particular Business Combination, and such Business Combination shall require
only such affirmative vote as is required by law, the By-Laws of the Corporation
and any other provision of the Certificate of Incorporation, if all of the
conditions specified in either of the following paragraphs (B)(i) and (B)(ii)
are met:

         (i) the cash, property, securities or other consideration to be
received per share by holders of the Class A Common Stock and Class B Common
Stock in the Business Combination is the same with respect to both classes and
is either (A) the same in form and amount per share as the highest consideration
paid by the Related Person in a tender or exchange offer in which such Related
Person acquired at least 50% of the outstanding stock of either the Class A
Common Stock or the Class B Common Stock and which was consummated not more than
one year prior to the date of such Business Combination, or if earlier, the
entering into of a definitive agreement providing therefor or (B) not less in
amount (as to cash) or Fair Market Value (as to consideration other than cash)
as of the date of the determination of the Highest Per Share Price (as to
property, securities or other consideration) than the Highest Per Share Price;
provided that, in the event of any Business Combination 



                                       23
<PAGE>   24


in which the Corporation survives, any shares retained by the holders thereof
shall constitute consideration other than cash for purposes of this paragraph
(B)(i); or

         (ii) a majority of the Continuing Directors shall have expressly
approved such Business Combination either in advance of or subsequent to such
Related Person's having become a Related Person.

         In the case of any Business Combination with a Related Person to which
paragraph (B)(ii) above does not apply, a majority of the Continuing Directors,
promptly following the request of a Related Person, shall determine the Highest
Per Share Price for each class or series of stock of the Corporation. Such
determination shall be announced not less than five days prior to the meeting at
which holders of shares vote on the Business Combination. Such determination
shall be final, unless the Related Person becomes the Beneficial Owner of
additional shares of Common Stock after the date of the earlier determination,
in which case the Continuing Directors shall make a new determination as to the
Highest Per Share Price for each class or series of shares prior to the
consummation of the Business Combination.

         A Related Person shall be deemed to have acquired a share at the time
that such Related Person became the Beneficial Owner thereof. With respect to
shares owned by Affiliates, Associates and other Persons whose ownership is
attributable to a Related Person, if the price paid by such Related Person for
such shares is not determinable by a majority of the Continuing Directors, the
price so paid shall be deemed to be the higher of (i) the price paid upon the
acquisition thereof by the Affiliate, Associate or other Person or (ii) the
Share Price of the shares in question at the time when the Related Person became
the Beneficial Owner thereof.

         C. For purposes of this Article NINTH and notwithstanding anything to
the contrary set forth in this Certificate of Incorporation:

         (i) The term "Affiliate," used to indicate a relationship to a
specified Person, shall mean a Person that directly, or indirectly through one
or more intermediaries, controls, is controlled by, or is under common control
with, such specified Person.




                                       24
<PAGE>   25



         (ii) The term "Associate," used to indicate a relationship with a
specified Person, shall mean (A) any corporation, partnership, limited liability
company, association, joint venture or other organization (other than the
Corporation or any wholly owned subsidiary of the Corporation) of which such
specified Person is an officer or partner or is, directly or indirectly, the
Beneficial Owner of 10% or more of any class of equity securities; (B) any trust
or other estate in which such specified Person has a beneficial interest of 10%
or more or as to which such specified Person serves as trustee or in a similar
fiduciary capacity; (C) any Person who is a director or officer of such
specified Person or any of its parents or subsidiaries (other than the
Corporation or any wholly owned subsidiary of the Corporation); and (D) any
relative or spouse of such specified Person or of any of its Associates, or any
relative of any such spouse, who has the same home as such specified Person or
such Associate.

         (iii) A Person shall be a "Beneficial Owner" of any stock (A) which
such Person or any of its Affiliates or Associates beneficially owns, directly
or indirectly; or (B) which such Person or any of its Affiliates or Associates
has, directly or indirectly, (1) the right to acquire (whether such right is
exercisable immediately or only after the passage of time), pursuant to any
agreement, arrangement or understanding or upon the exercise of conversion
rights, exchange rights, warrants or options, or otherwise, or (2) the right to
vote pursuant to any agreement, arrangement or understanding; or (C) which is
beneficially owned, directly or indirectly, by any other Person, with which such
Person or any of its Affiliates or Associates has any agreement, arrangement or
understanding for the purpose of acquiring, holding, voting or disposing of such
stock; or (D) of which such Person would be the Beneficial Owner pursuant to the
terms of Rule 13d-3 of the Exchange Act, as in effect on September 30, 1998.
Stock shall be deemed "Beneficially Owned" by the Beneficial Owner or Owners
thereof.

         (iv) The term "Business Combination" shall mean any transaction which
is referred to in any one or more of clauses (i) through (iv) of paragraph (A)
of this Article NINTH.




                                       25
<PAGE>   26



         (v) The term "Continuing Director" shall mean, with respect to a
Business Combination with a Related Person, any director of the Corporation who
is unaffiliated with the Related Person and was a director prior to the time
that the Related Person became a Related Person, and any successor of a
Continuing Director who is unaffiliated with the Related Person and is
recommended or nominated to succeed a Continuing Director by a majority of the
Continuing Directors. Without limiting the generality of the foregoing, a
director shall be deemed to be affiliated with a Related Person if such
director (A) is an officer, director, employee or general partner of such
Related Person; (B) is an Affiliate or Associate of such Related Person; (C) is
a relative or spouse of such Related Person or of any such officer, director,
general partner, Affiliate or Associate; (D) performs services, or is a member,
employee, greater than 5% stockholder or other equity owner of any organization
(other than the Corporation and its subsidiaries) which performs services for
such Related Person or any Affiliate of such Related Person, or is a relative or
spouse of any such Person; or (E) was nominated for election as a director by
such Related Person. Notwithstanding anything to the contrary set forth herein,
any person nominated with the approval of the DuPont Company shall be deemed to
be a Continuing Director.

         (vi) The term "Fair Market Value" shall mean, in the case of
securities, the average of the closing sales prices during the 30-day period
immediately preceding the date in question of such security on the principal
United States securities exchange registered under the Exchange Act on which
such security is listed (or the composite tape therefor) or, if such securities
are not listed on any such exchange, the average of the last reported sales
price (if so reported) or the closing bid quotations with respect to such
security during the 30-day period preceding the date in question on the New
York Stock Exchange or, if no such quotations are available, the fair market
value on the date in question of such security as determined in good faith by a
majority of the Continuing Directors; and in the case of property other than
cash or securities, the fair market value of such property on the date in
question as determined in good faith by a majority of the Continuing Directors.




                                       26
<PAGE>   27

         (vii) The term "Highest Per Share Price" shall mean, with respect to a
Related Person, the highest price that can be determined to have been paid or
agreed to be paid for any share or shares of the Class A Common Stock, Class B
Common Stock, or Voting Stock by such Related Person in a transaction that
either (1) resulted in such Related Person's Beneficially Owning 15% or more of
the Class A Common Stock, Class B Common Stock, or Voting Stock outstanding or
(2) was effected at a time when such Related Person Beneficially Owned 15% or
more of the Class A Common Stock, Class B Common Stock, or Voting Stock
outstanding, in either case occurring not more than one year prior to the date
of the Business Combination. In determining the Highest Per Share Price,
appropriate adjustment will be made to take into account (w) distributions paid
or payable in stock, (x) subdivisions of outstanding stock, (y) combinations of
shares of stock into a smaller number of shares and (z) similar events.

         (viii) The term "Person" shall mean any individual, corporation,
limited liability company, association, partnership, joint venture, trust,
estate or other entity or organization.

         (ix) The term "Related Person" shall mean any Person (other than the
Corporation or any subsidiary of the Corporation and other than any profit
sharing, employee ownership or other employee benefit plan of the Corporation
or any subsidiary of the corporation or any trustee of or fiduciary with respect
to any such plan when acting in such capacity) who or which (A) is the
Beneficial Owner of 15% or more of the Class A Common Stock, Class B Common
Stock or Voting Stock outstanding; or (B) is an Affiliate of the Corporation and
at any time within the two-year period immediately prior to the date in question
was the Beneficial Owner of 15% or more of the Class A Common Stock, Class B
Common Stock or Voting Stock outstanding. For the purposes of determining
whether a Person is a Related Person, the number of shares of any class or
series deemed to be outstanding shall include shares of such class or series of
which the Person is deemed the Beneficial Owner, but shall not include any other
shares which may be issuable pursuant to any agreement, arrangement or
understanding, or upon exercise of conversion rights, warrants or options,
otherwise. Notwithstanding anything to the contrary herein, neither DuPont nor
its Affiliates or Associates shall be deemed to be Related Persons.



                                       27
<PAGE>   28



         D. Nothing contained in this Article NINTH shall be construed to
relieve any Related Person from any fiduciary obligation imposed by law.

         E. Notwithstanding any other provision of this Certificate of
Incorporation (and notwithstanding that a lesser percentage may be specified by
law), the affirmative vote of shares representing (x) not less than 80% of the
Voting Stock, (y) not less than 66 2/3% of the Voting Stock not Beneficially
Owned, directly or indirectly, by any Related Person and (z) in addition, from
and after the First Trigger Date, a majority of the votes entitled to be cast by
the holders of each class of Common Stock (excluding all shares Beneficially
Owned, directly or indirectly, by any Related Person), voting separately by
class, shall be required to amend or re peal, or adopt any provisions
inconsistent with, this Article NINTH; provided that, at any time prior to the
Second Trigger Date, the required percentage in clause (x) shall be 66 2/3% and
the required percentage in clause (y) shall be 50.01%.




                                       28
<PAGE>   29


         IN WITNESS WHEREOF, this Restated Certificate of Incorporation which
restates, integrates and amends the provisions of the Certificate of
Incorporation of the Corporation, and which has been duly adopted in accordance
with Sections 242 and 245 of the Delaware General Corporation Law, has been
executed by an authorized officer of the Corporation this ____ day of October,
1998.

                                          Conoco Inc.



                                          By:
                                              ----------------------------------
                                               [Name]
                                               [Title]





<PAGE>   1

                                                                    EXHIBIT 4.5
                                                                           

                                NORSKE CONOCO AS


                               MINUTES OF MEETING
                 OF THE BOARD OF DIRECTORS HELD ON 2 MARCH, 1996

On 2 March 1996, a meeting of the Board of Directors of Norske Conoco AS was
held at the offices of Norske Conoco AS at Tangen 7, Randaberg, Norway. The
following members of the Board of Directors were present:

Dieter Schaubert - Chairman of the board
Michael L. Johnson - director
Andreas Middelthon - director
Nils Svanberg - director
Ellen Bru Solberg - director

The meeting was called to order by Dieter Schaubert.

                                       1.

The 1995 Accounts and Report of the Board of Directors, a copy of which was
presented for consideration, was approved. The board decided to recommend to the
shareholder meeting that the 1995 loss of NOK 93 712 would be offset against the
reserve fund.

                                       2.

The chairman informed the board about the desire of Conoco Norway Inc. to
transfer its undertakings to Norske Conoco AS in order to insulate against
undesirable tax consequences in USA and improve Conoco's position to conduct its
business in Norway vis a vis the authorities, partners, business environment in
general, employees and the public. Based upon the discussion that followed the
following resolutions were adopted:

RESOLVED: Management is hereby authorized to cancel the Pass Through Agreements
for PL 037, 051, 054, 095, 103, 104, 124, 144, 157, 172, 192, 195, 197 and the
pass through agreements for pipelines except Statpipe, between Norske Conoco AS
and Conoco Norway Inc. UA which transfer the economic interest and make the
rights and obligations following the production licenses available financially
and operationally for the business from Conoco Norway Inc. UA to Norske Conoco
AS subject to the non-objection of the Norwegian government.

RESOLVED: All licenses, license assets and other assets with their respective
rights and obligations as they are booked as per today can be transferred to
Norske Conoco AS at Norwegian book value. The Statpipe pipeline systems, onshore
and offshore, Production license 019A, 019B, 069, 086, 109, 115, 116, 120, 164,
169 and 181 with its associated rights and liabilities will remain in CNI UA.


<PAGE>   2

RESOLVED, Norske Conoco AS is willing to receive and undertake the
responsibilities of employer of all CNI employees, receive all resources and
equipment which are required for the exploration, development and operations of
Production Licenses 037, 051, 054, 095, 103, 104, 124, 144, 157, 172, 192, 195,
197 and all pipeline systems except Statpipe onshore and offshore. Further that
the respective Pass Through Agreements for the subject licenses and pipelines
except Statpipe are terminated whereby Norske Conoco receives the full
responsibility for due performance of all obligations resulting from the
productions licenses as of 2 March 1996.

RESOLVED, Norske Conoco AS will receive the shares of Conoco Investment Norge
AS, the shares of Du Pont JET AS, the equity interest in the Statoil Metanol
ANS, the equity interest in Tjeldbergodden Luftgassfabrikk DA, the equity in
Statfjord Transport AS and KS Statfjord Transport AS.

RESOLVED: All employment agreements and secondment agreements for personnel
working on a Conoco payroll in Norway shall transfer to Norske Conoco AS as per
today.

RESOLVED: Based upon Norwegian book values, Norske Conoco shall pay NOK
9.909.542.285 for the transfer of assets transferred in the resolutions above.

RESOLVED: Norske Conoco AS will settle the payment to Conoco Norway Inc. UA for
the transfer of assets and liabilities described in this meeting by taking over
liabilities in the form of (1) long term debt of NOK 7.258.750.000 and (2)
working capital of NOK 98.265.750 and (3) settle the balance by receipt of a
capital contribution from Conoco Norway Inc. UA converted to equity in an amount
of NOK 2.552.526.535.

                                       3.

The structure of the Norwegian Conoco subsidiaries has changed and, therefore,
the board made the following resolution:

RESOLVED: Norske Conoco AS as the sole shareholder of Conoco Investments Norge
AS and Du Pont JET AS, hereby makes, constitutes and appoints M. L. Johnson its
representative, with power of attorney, to cast the votes of Norske Conoco AS at
any of the ordinary, extraordinary or special meetings of the stockholders of
Conoco Investments Norge AS and Du Pont JET AS during the remaining year 1996
and 1997.

                                       4.

Norske Conoco AS has of today accepted the employment of more than 50 employees.
It is uncertain how many employees the company will have over the next few
years, however, the board discussed the need to recognize the intent of the law
and not make an issue over the average number of employees over a 3 year period,
but rather recognize the fact that a significant number, and more than 50,
employees have work for Conoco in Norway over the last several years. The board
made the following resolution:

RESOLVED: The company will make available to its employees 2 positions as board
members and 4 positions as deputy board members, to be elected for a term of 2
years.



<PAGE>   3

RESOLVED: An election board is established consisting of Bodil Finstad,
Alexander J. (Jamie) Middleton and Andreas Middelthon to plan and execute an
election of employee board representatives pursuant to directives provided in
laws and regulations. The election shall take place as soon as possible.

There being no other business to come before the meeting, upon duly motion made
and seconded, it was resolved to adjourn the meeting.



- ------------------------      ------------------------    ----------------------
Michael L. Johnson            Andreas Middelthon          Dieter Schaubert



            ---------------------------                ------------------------
            Ellen Solberg                              Nils Svanberg



<PAGE>   4

                                 PROMISSORY NOTE


NOK 1,000,000,000

                                                              Stavanger, Norway
                                                               February 4, 1994


In consideration for the loan by Du Pont Chemical and Energy Operations Inc.
(DCEO) a corporation organized under the laws of Delaware, in the amount of NOK
1,000,000,000 (NOK 1 billion) received February 4, 1994 by Conoco Norway Inc.
(CNI), a corporation organized under the laws of Delaware, CNI promises to pay
to the order of DCEO the principal amount of NOK 1,000,000,000 (NOK 1 billion)
and interest thereon calculated at a rate per six months which is three eights
percent above the six month NIBOR rate as quoted by Dagens Naeringsliv on the
first business day of January and July in each year (except that for the initial
period interest shall be calculated at the six months NIBOR rate as quoted by
Dagens Naeringsliv on February 4, 1994 plus three eights percent). The rate
established on such date shall apply to all monies borrowed or outstanding
during the six month period following such date. The maturity date for the loan
shall be February 4, 1999 after which the loan will be paid on demand to DCEO by
CNI subject to DCEO giving ten (10) days notice to CNI of such payment. CNI
shall have the right at any time to make full or partial prepayments of
principal and/or interest on giving at least ten (10) days notice to DCEO.

Interest shall be calculated on the basis of actual days of the month and a
360-day year commencing February 4, 1994. Interest shall be paid semiannually in
arrears on the last business day of each period with the final interest payment
due upon maturity of this agreement or upon final principal payment whichever
comes first.

For and on behalf of
Conoco Norway Inc.



- ---------------------------------
Mike L. Johnson
President & Managing Director



<PAGE>   5

                                 PROMISSORY NOTE


NOK 220,000,000
                                                              Stavanger, Norway
                                                              December 20, 1993

In consideration for the loan by Du Pont Chemical and Energy Operations Inc.
(DCEO) a corporation organized under the laws of Delaware, in the amount of NOK
220,000,000 (NOK Two Hundred and Twenty Million) received December 20, 1993 by
Conoco Norway Inc. (CNI), a corporation organized under the laws of Delaware,
CNI promises to pay to the order of DCEO the principal amount of NOK 220,000,000
(NOK Two Hundred and Twenty Million) and interest thereon calculated at a rate
per six months which is three eights percent above the six month NIBOR rate as
quoted by Dagens Naeringsliv on the first business day of January and July in
each year (except that for the initial period interest shall be calculated at
the six months NIBOR rate as quoted by Dagens Naeringsliv on December 20, 1993
plus three eights percent ). The rate established on such date shall apply to
all monies borrowed or outstanding during the six month period following such
date. The maturity date for the loan shall be 20 December, 1998 after which the
loan will be paid on demand to DCEO by CNI subject to DCEO giving ten (10) days
notice to CNI of such payment. CNI shall have the right at any time to make full
or partial prepayments of principal and/or interest on giving at least ten (10)
days notice to DCEO.

Interest shall be calculated on the basis of actual days of the month and a
360-day year commencing December 20, 1993. Interest shall be paid semiannually
in arrears on the last business day of each period with the final interest
payment due upon maturity of this agreement or upon final principal payment
whichever comes first.

For and on behalf of
Conoco Norway Inc.



- ---------------------------------
Mike L. Johnson
President & Managing Director


<PAGE>   6

                                 PROMISSORY NOTE


NOK 700,000,000

                                                              Stavanger, Norway
                                                               January 11, 1995

In consideration for the loan by Du Pont Chemical and Energy Operations Inc.
(DCEO) a corporation organized under the laws of Delaware, in the amount of NOK
700,000,000 (NOK Seven Hundred Million) received January 11, 1995 by Conoco
Norway Inc. (CNI), a corporation organized under the laws of Delaware, CNI
promises to pay to the order of DCEO the principal amount of NOK 700,000,000
(NOK Seven Hundred Million) and interest thereon calculated at a rate per six
months which is three eights percent above the six month NIBOR rate as quoted by
Dagens Naeringsliv on the first business day of January and July in each year
(except that for the initial period interest shall be calculated at the six
months NIBOR rate as quoted by Dagens Naeringsliv on January 11, 1995 plus three
eights percent). The rate established on such date shall apply to all monies
borrowed or outstanding during the six month period following such date. The
maturity date for the loan shall be January 11, 2000 after which the loan will
be paid on demand to DCEO by CNI subject to DCEO giving ten (10) days notice to
CNI of such payment. CNI shall have the right at any time to make full or
partial prepayments of principal and/or interest on giving at least ten (10)
days notice to DCEO.

Interest shall be calculated on the basis of actual days of the month and a
360-day year commencing January 11, 1995. Interest shall be paid semiannually in
arrears on the last business day of each period with the final interest payment
due upon maturity of this agreement or upon final principal payment whichever
comes first.

For and on behalf of
Conoco Norway Inc.




- ---------------------------------
Mike L. Johnson
President & Managing Director


<PAGE>   7

                                 PROMISSORY NOTE


NOK 360,000,000


                                                              Stavanger, Norway
                                                               October 01, 1993

In consideration for the loan by Du Pont Chemical and Energy Operations Inc.
(DCEO) a corporation organized under the laws of Delaware, in the amount of NOK
360,000,000 (NOK Three Hundred and Sixty Million) received October 1, 1993 by
Conoco Norway Inc. (CNI), a corporation organized under the laws of Delaware,
CNI promises to pay to the order of DCEO the principal amount of NOK 360,000,000
(NOK Three Hundred and Sixty Million) and interest thereon calculated at a rate
per six months which is three eights percent above the six month NIBOR rate as
quoted by Dagens Naeringsliv on the first business day of January and July in
each year (except that for the initial period interest shall be calculated at
the six months NIBOR rate as quoted by Dagens Naeringsliv on October 1, 1993
plus three eights percent). The rate established on such date shall apply to all
monies borrowed or outstanding during the six month period following such date.
The maturity date for the loan shall be 1 October, 1998 after which the loan
will be paid on demand to DCEO by CNI subject to DCEO giving ten (10) days
notice to CNI of such payment. CNI shall have the right at any time to make full
or partial prepayments of principal and/or interest on giving at least ten (10)
days notice to DCEO.

Interest shall be calculated on the basis of actual days of the month and a
360-day year commencing October 1, 1993. Interest shall be paid semiannually in
arrears on the last business day of each period with the final interest payment
due upon maturity of this agreement or upon final principal payment whichever
comes first.

For and on behalf of
Conoco Norway Inc.




- ---------------------------------
Mike L. Johnson
President & Managing Director


<PAGE>   8

                                 PROMISSORY NOTE


NOK 1,173,000,000

                                                             Stavanger, Norway 
                                                                   May 16, 1994

In consideration for the loan by Du Pont Chemical and Energy Operations Inc.
(DCEO) a corporation organized under the laws of Delaware, in the amount of NOK
1,173,000,000 (NOK One Billion One Hundred and Seventy Three Million) received
May 16, 1994 by Conoco Norway Inc. (CNI), a corporation organized under the laws
of Delaware, CNI promises to pay to the order of DCEO the principal amount of
NOK 1,173,000,000 (NOK One Billion One Hundred and Seventy Three Million) and
interest thereon calculated at a rate per six months which is three eights
percent above the six month NIBOR rate as quoted by Dagens Naeringsliv on the
first business day of January and July in each year (except that for the initial
period interest shall be calculated at the six months NIBOR rate as quoted by
Dagens Naeringsliv on May 16, 1994 plus three eights percent). The rate
established on such date shall apply to all monies borrowed or outstanding
during the six month period following such date. The maturity date for the loan
shall be May 16, 1999 after which the loan will be paid on demand to DCEO by CNI
subject to DCEO giving ten (10) days notice to CNI of such payment. CNI shall
have the right at any time to make full or partial prepayments of principal
and/or interest on giving at least ten (10) days notice to DCEO.

Interest shall be calculated on the basis of actual days of the month and a
360-day year commencing May 16, 1994. Interest shall be paid semiannually in
arrears on the last business day of each period with the final interest payment
due upon maturity of this agreement or upon final principal payment whichever
comes first.

For and on behalf of
Conoco Norway Inc.




- ---------------------------------
Mike L. Johnson
President & Managing Director


<PAGE>   9

                                 PROMISSORY NOTE


NOK 630,000,000

                                                              Stavanger, Norway
                                                                   July 1, 1994

In consideration for the loan by Du Pont Chemical and Energy Operations Inc.
(DCEO) a corporation organized under the laws of Delaware, in the amount of NOK
630,000,000 (NOK Six Hundred and Thirty Million) received July 1, 1994 by Conoco
Norway Inc. (CNI), a corporation organized under the laws of Delaware, CNI
promises to pay to the order of DCEO the principal amount of NOK 630,000,000
(NOK Six Hundred and Thirty Million) and interest thereon calculated at a rate
per six months which is three eights percent above the six month NIBOR rate as
quoted by Dagens Naeringsliv on the first business day of January and July in
each year. The rate established on such date shall apply to all monies borrowed
or outstanding during the six month period following such date. The maturity
date for the loan shall be July 1, 1999 after which the loan will be paid on
demand to DCEO by CNI subject to DCEO giving ten (10) days notice to CNI of such
payment. CNI shall have the right at any time to make full or partial
prepayments of principal and/or interest on giving at least ten (10) days notice
to DCEO.

Interest shall be calculated on the basis of actual days of the month and a
360-day year commencing July 1, 1994. Interest shall be paid semiannually in
arrears on the last business day of each period with the final interest payment
due upon maturity of this agreement or upon final principal payment whichever
comes first.

For and on behalf of
Conoco Norway Inc.



- ---------------------------------
Mike L. Johnson
President & Managing Director

<PAGE>   1
                                                                    EXHIBIT 4.7



              PROMISSORY NOTE, dated as of July 20, 1998, by Conoco Inc., a
         Delaware corporation (the "Issuer"), in favor of Du Pont Energy
         Company, a Delaware corporation (the "Payee").

              Section 1.     Principal.  Issuer, for value received, hereby
         promises to pay to the order of Payee, the sum of Seven Billion Five
         Hundred Million Dollars  ($7,500,000,000) (the "Principal") and any
         and all interest thereon as provided in Section 2 below in accordance
         with the terms hereof.  The Principal shall be repaid in full by the
         Issuer, without premium or penalty, on January 2, 2000 (the "Final
         Maturity Date"), to the extent not previously paid in accordance with
         Section 3.

              Section 2.     Interest.  The Issuer agrees to pay interest in
         respect of the unpaid Principal from the date hereof until paid in
         full at a rate equal to 6.0125 percent per annum, such interest to be
         computed on the basis of a 360-day year, and paid for the actual
         number of days elapsed.  In the event that, and for so long as, an
         Event of Default under Section 7 shall have occurred and be
         continuing, the outstanding Principal and, to the extent permitted by
         law, overdue interest in respect thereof, shall bear interest at a
         rate per annum equal to the prime rate of J.P. Morgan as in effect in
         New York City on the date of the Event of Default (as defined below)
         plus three percentage points, such interest to be computed on the
         basis of a 360-day year, and paid for the actual number of days
         elapsed.  Accrued interest on the outstanding Principal amount (up
         through and including the day prior to any payment other than a
         payment on the Final Maturity Date) shall be due and payable on the
<PAGE>   2

         Final Maturity Date and, if payments of Principal are made prior to
         the Final Maturity Date, including pursuant to Section 3, on the date
         of any payment of the Principal and on the date of any acceleration of
         the payment of the Principal pursuant to Section

              Section 3.     Payments.

                     (a)     Mandatory Prepayments.  On the first business day
         after the date of the receipt thereof by the Issuer or any of its
         Subsidiaries, an amount equal to 100% of the cash proceeds of (i)
         contributions received by the Issuer of proceeds of the issuance of
         equity securities or the incurrence of Indebtedness by a Parent
         Company,  (ii) the issuance or sale of equity securities by the Issuer
         or any of its Subsidiaries (net of underwriting discounts and
         commissions and other reasonable costs associated therewith, such
         other reasonable costs to be mutually agreed upon by the Issuer and
         Payee) and (iii) the incurrence of Indebtedness by the Issuer or any
         of its Subsidiaries (net of underwriting discounts and commissions and
         other reasonable costs associated therewith, such other reasonable
         costs  to be mutually agreed upon by the Issuer and Payee), except for
         the incurrence of Indebtedness pursuant to a revolving credit facility
         provided to the Issuer by DuPont Energy Company (the "Revolving Credit
         Facility"), in each case, shall be applied as a mandatory repayment of
         Principal and accrued interest on the amount of such Principal, except
         to the extent such proceeds are used to repay any other Indebtedness
         of the Issuer, Conoco Energy Company ("Conoco") and any of their
         Subsidiaries (the "Conoco Entities") to E.I. du Pont de Nemours and
         Company ("DuPont") and any of its Subsidiaries (other than any Conoco
         Entities) to the extent that both Conoco and Payee consent to the


                                       2
<PAGE>   3

         repayment of such Indebtedness in lieu of payment under this Note.
         Notwithstanding the foregoing, the provisions of Sections 3(a)(i) and
         (ii) shall not apply to the net proceeds received from the exercise of
         stock options granted to directors, officers and employees of the
         relevant entity.

                   (b)  Voluntary Prepayments.  The Issuer shall have the right
         to prepay the Principal and accrued interest on the amount of such
         Principal in whole or in part from time to time, without premium or
         penalty.

                   (c)  Method and Place of Payment.  All payments under this
         Note shall be made to the Payee not later than 12:00 noon, New York
         time, on the date when due in U.S. dollars in immediately available
         funds to such account as may be specified from time to time in writing
         by the Payee to the Issuer, and any funds received after such time
         shall, for all purposes hereof, be deemed to have been paid on the
         next succeeding business day.  Whenever any payment to be made
         hereunder shall be stated to be due on a day which is not a business
         day, the due date thereof shall be extended to the next succeeding
         business day and, with respect to payments of principal, interest
         shall be payable at the applicable rate during such extension.  The
         Issuer shall not have any right of setoff or counterclaim, and all
         payments made by the Issuer hereunder shall be made irrespective of,
         and without any reduction for, any setoff or counterclaims.

              Section 4.     Representations and Warranties.  In order to
         induce the Payee to accept the Note, the Issuer makes the following
         representations and warranties, which shall survive the execution and
         delivery of this Note:  the Issuer (a) is a duly


                                       3
<PAGE>   4

         organized and validly existing corporation in good standing under the
         laws of the jurisdiction of its incorporation, (b) has the corporate
         power and authority to own its property and assets and to transact the
         business in which it is engaged or presently proposes to engage and
         (c) has the corporate power and authority to execute, deliver and
         carry out the terms and provisions of this Note and has taken all
         necessary corporate action to authorize the execution, delivery and
         performance by it hereof.  The Issuer has duly executed and delivered
         this Note, and this Note constitutes its legal, valid and binding
         obligation, enforceable in accordance with its terms.  Neither the
         execution, delivery or performance by the Issuer of this Note nor
         compliance by it with the terms and provisions hereof nor the
         consummation of the transactions contemplated hereby, (a) will
         contravene any applicable provision of any law, statute, rule,
         regulation (including Regulations U, T and X of the Board of Governors
         of the Federal Reserve System), order, writ, injunction or decree of
         any court or governmental instrumentality or (b) will conflict or be
         inconsistent with or result in any breach of any of the terms,
         covenants, conditions or provisions of, or constitute a default under,
         or result in the creation or imposition of (or the obligation to
         create or impose) any lien upon any of the property or assets of the
         Issuer pursuant to the terms of any indenture, mortgage, deed of
         trust, agreement or other instrument to which the Issuer is a party or
         by which it or any of its property or assets is bound or to which it
         may be subject (other than this Note), or (c) will violate any
         provision of the Issuer's Certificate of Incorporation or By-Laws.
         The Issuer and its Subsidiaries have incurred no Indebtedness other
         than the obligations incurred hereunder and the


                                       4
<PAGE>   5

         Indebtedness set forth on Schedules I and II hereto.

              Section 5.     Affirmative Covenants.  The Issuer covenants and
         agrees that until the Principal and all other obligations under this
         Note are paid in full:  (a)  the Issuer will furnish the Payee within
         nine (9)  business days after the end of each quarter and eleven (11)
         business days after the end of each fiscal year, the unaudited balance
         sheet and income statement, or consolidated balance sheet and income
         statement, if any, of the Issuer and its Subsidiaries as at the end of
         such period in the form and substance consistent with the current
         practice of the Issuer; (b) (i) the Issuer shall furnish to the Payee
         such financial information or documents in the possession of the
         Issuer or any of its Subsidiaries as the Payee may reasonably request,
         (ii)  the Issuer shall furnish to the Payee on a monthly basis such
         management and other periodic reports related to financial information
         in the form and substance consistent with the current practice of the
         Issuer and (iii) will provide the Payee reasonable access to the books
         and records of the Issuer and any of its Subsidiaries as the Payee may
         from time to time reasonably request; (c) the Issuer and its
         Subsidiaries shall keep proper books of record and account in
         conformity with GAAP and all requirements of applicable law; and (d)
         the Issuer shall, and shall cause each of its Subsidiaries to, comply
         in all material respects with all applicable laws, rules, statutes,
         regulations, decrees and orders of, and all applicable restrictions
         imposed by, all governmental bodies, domestic or foreign, in respect
         of the conduct of their business and the ownership of their property.


                                       5
<PAGE>   6

              Section 6.     Negative Covenants.

                     (a)     Restriction on Fundamental Changes.   Without the
         Payee's prior written consent, the Issuer will not, and will not
         permit its Significant Subsidiaries to enter into any merger or
         consolidation, or liquidate, windup or dissolve (or suffer any
         liquidation or dissolution), discontinue its business or convey,
         lease, sell, transfer or otherwise dispose of, in one transaction or
         series of transactions, all or substantially all of its business or
         property, whether now or hereafter acquired.

                     (b)     Limitation on Liens.  Without the Payee's prior
         written consent, the Issuer agrees that neither it nor any of its
         Subsidiaries will issue, assume or guarantee any notes, bonds,
         debentures or other similar evidences of Indebtedness for money
         borrowed secured by a mortgage, lien, pledge or other encumbrance
         ("Mortgages") upon any Restricted Property without effectively
         providing that concurrently with issuance, assumption or guaranty of
         any such Indebtedness that the Note (together with, if the Issuer so
         determines, any other Indebtedness or obligation then existing or
         thereafter created ranking equally with the Note) shall be secured
         equally and ratably with (or prior to) such Indebtedness so long as
         such Indebtedness shall be so secured, except that this restriction
         will not apply to:  (i) Mortgages relating to pollution control or
         industrial revenue bonds; and (ii) Mortgages required by any contract
         or statute in order to permit the Issuer or any of its Subsidiaries to
         perform any contract or subcontract made by it with or at the request
         of the United States of America, any state or any department, agency
         or instrumentality or political subdivision of either.


                                       6
<PAGE>   7

              The Issuer agrees that if, upon any consolidation or merger of
         the Issuer with or into any other corporation, or upon any sale or
         conveyance of all or substantially all of its property to any other
         corporation, any of the Restricted Property of the Issuer or of any of
         its Subsidiaries would thereupon become subject to any Mortgage, the
         Issuer will first secure the Note equally and ratably with any
         obligations of the Issuer or any of its Subsidiaries then entitled
         thereto, by a direct lien on all such property prior to all liens
         other than any theretofore existing thereon.

              For the purposes of this Section, the following types of
         transactions shall not be deemed to create Indebtedness secured by a
         Mortgage; the sale or other transfer of (i) oil, gas, coal, uranium,
         copper or other minerals in place for a period of time until, or in an
         amount such that, the purchaser will realize therefrom a specified
         amount of money (however determined) or a specified amount of such
         minerals, or (ii) any other interest in property of the character
         commonly referred to as a "production payment".

                     (c)     Limitation on Subsidiaries' Borrowing.  Without
         the prior written consent of the Payee, the Issuer will not permit any
         of its Subsidiaries to, and the Subsidiaries of the Issuer will not,
         incur any Indebtedness other than Indebtedness owed to the Issuer or
         to a wholly owned Subsidiary of the Issuer.

              Section 7.     Events of Default.  Each of the following events,
         acts, occurrences or conditions shall constitute an Event of Default
         under this Note:

                             (a)  The Issuer shall default in the payment when
         due of any principal of or interest on the Indebtedness evidenced by
         this Note and such default shall continue for five days.


                                       7
<PAGE>   8





                             (b)  Any representation or warranty made by the
         Issuer herein or in any certificate or statement delivered pursuant
         hereto shall prove to be false or misleading in any material respect
         at any time.

                             (c)  The Issuer shall fail to perform or observe
         any other agreement, covenant or obligation arising hereunder;
         provided, that any failure pursuant to Section 5 hereof shall be
         continuing fifteen days after notice thereof to Issuer.

                             (d)  The Issuer, any of its Subsidiaries or a
         Parent Company shall default in the payment when due (whether by
         scheduled maturity, required prepayment, acceleration, demand or
         otherwise) of any amount owing in respect of any Indebtedness for
         borrowed money in excess, in the aggregate, of Fifty Million Dollars
         ($50,000,000) in principal outstanding Indebtedness and such default
         continues after any applicable grace period; or the Issuer, any of its
         Subsidiaries or a Parent Company shall default in the performance or
         observance of any obligation or condition with respect to any such
         Indebtedness or any other event shall occur or condition shall exist,
         if the effect of such default, event or condition is to accelerate the
         maturity of any Indebtedness having an aggregate principal amount in
         excess of Fifty Million Dollars ($50,000,000), or to permit the holder
         or holders thereof, or any trustee or agent for such holders, to
         accelerate the maturity of any Indebtedness having an aggregate
         principal amount in excess of Fifty Million Dollars ($50,000,000), or
         any Indebtedness having an aggregate principal amount in excess of
         Fifty Million Dollars ($50,000,000) shall become or be declared to be
         due and payable


                                       8
<PAGE>   9

         prior to its stated maturity other than as a result of a regularly
         scheduled payment.

                        (e) (i) The Issuer shall commence a voluntary case
         concerning itself under the Bankruptcy Code; or (ii) an involuntary
         case is commenced against the Issuer and the petition is not dismissed
         within 30 days after commencement of the case; or (iii) a custodian
         (as defined in the Bankruptcy Code) is appointed for, or takes charge
         of, all or substantially all of the property of the Issuer or the
         Issuer commences any other proceedings under any reorganization,
         arrangement, adjustment of debt, relief of debtors, dissolution,
         insolvency or liquidation or similar law of any jurisdiction whether
         now or hereafter in effect relating to the Issuer or there is
         commenced against the Issuer any such proceeding which remains
         undismissed for a period of 30 days; or (iv) any order of relief or
         other order approving any such case or proceeding is entered; or (v)
         the Issuer is adjudicated insolvent or bankrupt; or (vi) the Issuer
         suffers any appointment of any custodian or the like for it or any
         substantial part of its property to continue undischarged or unstayed
         for a period of 30 days; or (vii) the Issuer makes a general
         assignment for the benefit of creditors; or (viii) the Issuer shall
         fail to pay, or shall state that it is unable to pay, its debts
         generally as they become due; or (ix) the Issuer shall call a meeting
         of its creditors with a view to arranging a composition or adjustment
         of its debts; or (x) the Issuer shall by any act or failure to act
         consent to, approve of or acquiesce in any of the foregoing; or (xi)
         any corporate action is taken by the Issuer for the purpose of
         effecting any of the foregoing; or

                        (f)  A Change of Control of a Parent Company.


                                       9
<PAGE>   10

              Upon the occurrence and during the continuance of any Event of
         Default, the Payee may in its sole discretion (except in the case of
         an Event of Default occurring under clause (e) above, in which case
         the following will occur automatically) declare the unpaid principal
         amount of and any and all accrued and unpaid interest on the
         Indebtedness evidenced by this Note and any and all other obligations
         pursuant to this Note, and the same shall thereupon be, immediately
         due and payable with all additional interest from time to time accrued
         thereon and without presentation, demand, or protest or other
         requirements of any kind (including, without limitation, valuation and
         appraisement, diligence, presentment, notice of intent to demand or
         accelerate and notice of acceleration), all of which are hereby
         expressly waived by Issuer.

              Section 8.     Payment of Expenses; Indemnity.  Except for
         outofpocket costs and expenses incurred by each party in connection
         with the negotiation, preparation, execution and delivery of this
         Note, the Issuer shall indemnify the Payee, its officers, directors,
         partners, stockholders, employees, representatives and agents (each an
         "Indemnitee") from, and hold each of them harmless against, any and
         all losses, liabilities, claims, damages, expenses, obligations,
         penalties, actions, judgments, suits, costs or disbursements of any
         kind or nature whatsoever (including, without limitation, the fees and
         disbursements of counsel for such Indemnitee in connection with any
         investigative, administrative or judicial proceeding commenced or
         threatened, whether or not such Indemnitee shall be designated a party
         thereto) that may at any time (including, without limitation, at any
         time following the payment of the obligations) be imposed on, asserted
         against or incurred by any Indemnitee as a


                                       10
<PAGE>   11

         result of, or arising out of, or in any way related to or by reason
         of, (i) performance of this Note and (ii) the exercise by the Payee of
         its rights and remedies hereunder (but excluding, as to any
         Indemnitee, any such losses, liabilities, claims, damages, expenses,
         obligations, penalties, actions, judgments, suits, costs or
         disbursements incurred solely by reason of the gross negligence or
         willful misconduct of such Indemnitee as finally determined by a court
         of competent jurisdiction).  The Issuer's obligations under this
         paragraph shall survive the termination of this Note and the payment
         of the obligations.

              Section 9.     No Waiver; Remedies Cumulative.  No failure or
         delay on the part of the Payee in exercising any right, power or
         privilege hereunder and no course of dealing between the parties
         hereto shall operate as a waiver thereof; nor shall any single or
         partial exercise of any right, power or privilege hereunder preclude
         any other or further exercise thereof of the exercise of any other
         right, power or privilege hereunder.  The rights and remedies herein
         expressly provided are cumulative and not exclusive of any rights or
         remedies which the Payee would otherwise have.  No notice to or demand
         on the Issuer in any case shall entitle the Issuer to any other or
         further notice or demand in similar or other circumstances or
         constitute a waiver of the rights of the Payee to any other or further
         action in any circumstances without notice or demand.

              Section 10.    Miscellaneous.  This Note shall be binding upon
         and inure to the benefit of the Payee and the Issuer and their
         respective successors and assigns, except that the Issuer may not
         assign or transfer any of its rights or obligations under


                                       11
<PAGE>   12

         this Note without the prior written consent of the Payee.  This Note
         may not be amended, supplemented, modified or waived except in a
         writing executed by the Issuer and the Payee.  The headings of the
         several Sections and subsections of this Note are inserted for
         convenience only and shall not in any way affect the meaning or
         construction of any provision of this Note.  In case any provision in
         or obligation under this Note shall be invalid, illegal or
         unenforceable in any jurisdiction, the validity, legality and
         enforceability of the remaining provisions or obligations, or of such
         provision or obligation in any other jurisdiction, shall not in any
         way be affected or impaired thereby.

              Section 11.    Notices.  The Issuer agrees that all notices and
         deliveries to be made to the Payee pursuant to this Note will be made
         to the person and at the address as may be specified from time to time
         by the Payee to the Issuer in writing.  All notices and deliveries to
         be made to the Issuer pursuant to this Note will be made to the person
         and at the address as may be specified from time to time by the Issuer
         to the Payee in writing.

              Section 12.    Certain Definitions.
         As used in this Note, capitalized terms shall have the following
         meanings (such meanings to be equally applicable to both the singular
         and plural forms of the terms defined):

              "Change of Control"  with respect to a Parent Company shall occur
         if (A) the Permitted Holders (x) cease to be the beneficial owner,
         directly or indirectly, of at least 50% of the aggregate total voting
         power of each Parent Company, whether as a


                                       12
<PAGE>   13

         result of issuance of securities of a Parent Company, any merger,
         consolidation, liquidation or dissolution of a Parent Company, any
         direct or indirect transfer of securities by any Permitted Holders or
         otherwise, or (y) do not have the ability by voting power, contract or
         otherwise to elect or designate for election a majority of the Board
         of Directors of each Parent Company or (B) the Issuer ceases to be
         wholly owned, directly or indirectly, by each Parent Company.
         "Permitted Holders" are DuPont,  DuPont Energy Company and any other
         Subsidiary of DuPont.

              As used herein, "control" when used with respect to any specified
         person means the power to direct the management and policies of such
         person, directly or indirectly, whether through ownership of voting
         securities, by contract or otherwise.

              "GAAP" means United States generally accepted accounting
         principles in effect from time to time.

              "Indebtedness" of any person shall mean, (a) all obligations of
         such person for borrowed money, including Indebtedness under this Note
         or with respect to deposits or advances of any kind, (b) all
         obligations of such person evidenced by bonds, debentures, notes or
         similar instruments, (c) all obligations of such person upon which
         interest charges are customarily paid, (d) all obligations of such
         person under conditional sale or other title retention agreements
         relating to property or assets purchased by such person, (e) all
         obligations of such person issued or assumed as the deferred purchase
         price of property or services, (f) all Indebtedness of others secured
         by (or for which the holder of such Indebtedness has an existing
         right, contingent or otherwise, to be secured by) any Mortgage on
         property owned or acquired by such


                                       13
<PAGE>   14

         person, whether or not the obligations secured thereby have been
         assumed, (g) all guarantees by such person of Indebtedness of others
         which in the aggregate exceed Two Billion Dollars ($2,000,000,000)
         (provided that the Issuer will promptly notify the Payee of the
         incurrence by the Payee or one of its Subsidiaries of any guarantee of
         Indebtedness of others), (h) all capital lease obligations of such
         person, and (i) all securities or other similar instruments
         convertible or exchangeable into any of the foregoing, but excluding
         (1) industrial revenue bonds, (2) operating leases, (3) in the case of
         the Issuer, the Revolving Credit Facility and (4) daily cash
         overdrafts associated with routine cash operations.

              "Parent Company" means Conoco Energy Company or any other person
         that, directly or indirectly, through one or more intermediaries,
         controls the Issuer, other than DuPont, DuPont Energy Company, and
         other Subsidiaries of DuPont.  For purposes of this definition, Conoco
         Energy Company and its Subsidiaries shall not be deemed to be
         Subsidiaries of DuPont.

              "Restricted Property" means any shares of capital stock of a
         Subsidiary of the Issuer and any manufacturing plant or facility or
         any mineral, oil or gas producing property or any research facility
         owned by the Issuer or any of its Subsidiaries except any such plant
         or facility or property or research facility which, in the opinion of
         the Board of Directors of Conoco Energy Company is not a material
         asset of the Issuer or its Subsidiaries within the meaning of GAAP.

              "Significant Subsidiary" shall have the meaning given to such
         term under Rule 1-02 of Regulation S-X.


                                       14
<PAGE>   15

              "Subsidiary" means (a) any corporation at least a majority of the
         outstanding securities of which having ordinary voting power to elect
         a majority of the board of directors of such corporation is at the
         time owned or controlled directly or indirectly by such party and (b)
         any partnership, joint venture, association, joint stock company,
         trust, unincorporated organization or other entity, in which such
         party, directly or indirectly, has the power to elect or direct the
         election of a majority of the members of the governing body of such
         entity or otherwise has control over such entity (e.g., as the
         managing partner of a partnership).

              THIS NOTE AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES HEREUNDER
         SHALL BE CONSTRUED IN ACCORDANCE WITH AND BE GOVERNED BY THE LAWS OF
         THE STATE OF NEW YORK (WITHOUT GIVING EFFECT TO THE PRINCIPLES THEREOF
         RELATING TO CONFLICTS OF LAW).


                                       15
<PAGE>   16

              IN WITNESS WHEREOF, the Issuer has caused its duly authorized
         officer to execute and deliver this Note as of the date first above
         written.

                                            CONOCO INC.


                                            By:
                                               ------------------------------
                                            Name:  R.W. Goldman
                                            Title: Vice President


                                       16
<PAGE>   17

                                                               Schedule I to the
                                                                 Promissory Note

                           Indebtedness Documentation

         SCHEDULE OF EXISTING CONOCO INC. AND SUBSIDIARIES DEBT
         AS OF JUNE 30, 1998


<TABLE>
<CAPTION>
         ($ in millions)                    FYE 1997       2 QTR 1998
                                            --------       ----------
         <S>                                <C>            <C>
         SHORT-TERM OBLIGATIONS

         CAPITAL LEASES-SHORT-TERM PORTION     2.0             2.0

         CURRENT MATURITIES OF LT DEBT
         K.C. Asphalt L.L.C.                   1.0             1.1
         Conoco Mineraloel GMBH                1.7             1.7
         Conoco Development Company           22.5            22.5
                                             -----           -----
                                              25.2            25.3

         SUBTOTAL-SHORT-TERM DEBT             27.2            27.3

         LONG-TERM OBLIGATIONS
         KC Asphalt L.L.C.                    12.9            11.8
         Conoco Mineraloel GMBH               17.3            15.6
         Conoco Development II Inc.           20.0            20.0

         CAPITAL LEASES                       32.5            32.5

         SUBTOTAL-LONG-TERM DEBT              82.7            79.9
                                             -----           -----
         TOTAL DEBT                          109.9           107.2

         Minority Interest                   309.0           309.0


         TOTAL DEBT W/ MINORITY INTEREST     418.9           416.2
</TABLE>


                                       17
<PAGE>   18


SCHEDULE OF EXISTING GUARANTIES AS OF JUNE 30, 1998

                                                             Schedule II to the
                                                                Promissory Note


<TABLE>
<CAPTION>
                                    Name of Issuer of       Title of Issue of Each
                                    Securities and/or       Class of Securities               Nature of             
Subsidiary/Affiliate                Borrower Guaranteed     Guarantee                         Guarantee             
- --------------------                -------------------     -----------------------------     --------------------  
<S>                                 <C>                     <C>                               <C>                   
DUPONT GUARANTIES***
Retail Facilities Loan Program      SunTrust                Loan Repurchase Agreement         Principle & Interest  

Conoco Limited Marketing            NatWest Bank            Bank Loans to Dealer Accounts     Principle & Interest  

Dupont Conoco Poland                ING Bank                3rd Party Lease                   Lease Payment         

Polar Lights                        JP Morgan               Bank Loan                         Principle & Interest  

Petrozuata C.A.                     Various                 144A Bond Issue/Bank Loan         Principle & Interest  

Interconnector (UK) Ltd.            EIB                     Bank Loan                         Principle & Interest  

Excel Paralubes                     Various                 Debt Service Reserve              Principle & Interest  

Conoco Thailand                     DKB                     Bank Loan                         Principle & Interest  


CONOCO INC GUARANTIES

Polar Lights                        EBRD,IFC, & OPIC        Debt Service Reserve              Principle & Interest  

C&L  Processors                     Various                 Bank Loan                         Principle & Interest  

Deepwater I LLC                     Various                 Bank Loan                         Principle & Interest  

Deepwater II LLC                    Various                 Bank Loan                         Principle & Interest  

Explorer                            Various                 Loan(T&D Agreement)               Principle & Interest  

Jupiter                             PPG                     Trade Credit Agreement            Principle             

Hydroserve Westlake LLC             American General        Senior Secured Note               Principle & Interest  

Hydroserve Westlake LLC             Chase                   Letter of Credit                  Principle & Interest  

Merilectrica                        Westinghouse            EPC                               Completion            

Ingleside Cogen                     Various                 Bank Loan                         Principle & Interest  

Retail Facilities Loan
  Program - Minority Lending        SunTrust                Bank Loans to Conoco Jobbers      Principle & Interest  

Conoco International Inc            Citibank                Working Capital Facility          Principle & Interest  

Conoco Ex Pat Program               JP Morgan                                                 Principle & Interest  

Conoco Leasing Program              Boulder Capital         Leases to Conoco Jobbers          Lease obligations     

Balmar (Conoco Jobber)              Bank                                                      Principle & Interest  

Mortgage for Employee               Premier Bank                                              Principle & Interest  


<CAPTION>
                                    Direct/Indirect
Subsidiary/Affiliate                Guarantee             Interest Dollars     Total Principle    
- --------------------                ---------------       ----------------     ---------------    
<S>                                 <C>                   <C>                  <C>                
DUPONT GUARANTIES***                                                                              
Retail Facilities Loan Program           Direct                      --            42,722,839     

Conoco Limited Marketing                 Direct                      --             3,064,486

Dupont Conoco Poland                     Direct                      --               132,000

Polar Lights                             Direct               2,200,000           219,500,000     

Petrozuata C.A.                          Direct              10,067,813           501,000,000     

Interconnector (UK) Ltd.                 Direct                 203,740            65,314,000

Excel Paralubes                          Direct                      --                           

Conoco Thailand                          Direct                                     4,200,000     

                                      TOTAL DUPONT           12,471,553           835,933,325     

                                   TOTAL DUPONT GUARANTY COMMITMENTS FOR 6/30/98                  
CONOCO INC GUARANTIES

Polar Lights                             Direct                      --                           

C&L  Processors                          Direct                      --            21,604,500

Deepwater I LLC                          Direct                 715,444           137,000,000

Deepwater II LLC                         Direct                 571,742            52,000,000

Explorer                                Indirect                     --                           

Jupiter                                  Direct                      --                           

Hydroserve Westlake LLC                  Direct                  60,022            14,800,000

Hydroserve Westlake LLC                  Direct                  35,029             7,250,000

Merilectrica                             Direct                      --                      

Ingleside Cogen                          Direct                 169,807            34,500,000

Retail Facilities Loan                                                                            
  Program - Minority Lending             Direct                                                   

Conoco International Inc                 Direct                                                   

Conoco Ex Pat Program                    Direct                                     1,162,946

Conoco Leasing Program                   Direct                                       500,000     

Balmar (Conoco Jobber)                   Direct                                                   

Mortgage for Employee                    Direct                                       250,000

                                       TOTAL CONOCO           1,552,044           269,067,446     


<CAPTION>                         
                                  
Subsidiary/Affiliate                Other Commitments      Total Commitment      Undrawn Commitment   
- --------------------                -----------------      ----------------      ------------------   
<S>                                 <C>                    <C>                   <C>                  
DUPONT GUARANTIES***                                                                                  
Retail Facilities Loan Program                                100,000,000            57,277,161       
                                                                                                      
Conoco Limited Marketing                                                                              
                                                                                                      
Dupont Conoco Poland                                                                                  
                                                                                                      
Polar Lights                                                  275,000,000            55,500,000       
                                                                                                      
Petrozuata C.A.                                               726,450,000           225,450,000       
                                                                                                      
Interconnector (UK) Ltd.                                                                              
                                                                                                      
Excel Paralubes                         16,786,900                                                    
                                                                                                      
Conoco Thailand                                                10,000,000             5,800,000       
                                                                                                      
                                        16,786,900                                  344,027,161       
                                                                                                      
                                                                                $ 1,209,218,939       
CONOCO INC GUARANTIES                                                                                 
                                                                                                      
Polar Lights                            17,000,000                                                    
                                                                                                      
C&L  Processors                                                                                       
                                                                                                      
Deepwater I LLC                                               260,000,000           123,000,000       
                                                                                                      
Deepwater II LLC                                               70,000,000            18,000,000       
                                                                                                      
Explorer                                 9,408,000                                                    
                                                                                                      
Jupiter                                  9,000,000                                                    
                                                                                                      
Hydroserve Westlake LLC                                                                               
                                                                                                      
Hydroserve Westlake LLC                                                                               
                                                                                                      
Merilectrica                            21,322,516                                                    
                                                                                                      
Ingleside Cogen                                               105,000,000            70,500,000       
                                                                                                      
Retail Facilities Loan                                                                                
  Program - Minority Lending                                   25,000,000            25,000,000       
                                                                                                      
Conoco International Inc                                       75,000,000            75,000,000       
                                                                                                      
Conoco Ex Pat Program                                                                                 
                                                                                                      
Conoco Leasing Program                                          5,000,000             4,500,000       
                                                                                                      
Balmar (Conoco Jobber)                                          3,000,000             3,000,000       
                                                                                                      
Mortgage for Employee                                                                                 
                                                                                                      
                     TOTAL CONOCO       56,730,516                                  319,000,000       
                                                                                                      
    TOTAL CONOCO GUARANTY COMMITMENTS FOR 6/30/98                              $   646,350,006

    GRAND TOTAL GUARANTY COMMITMENTS FOR 6/30/98                               $ 1,855,568,945
                                                                               ---------------
</TABLE>


CONOCO DOES NOT ANTICIPATE THAT IT WILL HAVE TO PERFORM UNDER THESE GUARANTEES

***THE GUARANTY TOTAL ASSUMES THAT ALL DUPONT GUARANTIED OBLIGATIONS WILL BE
SUBSTITUTED WITH CONOCO GUARANTEES.



<PAGE>   19
                                    GUARANTY


     Conoco Inc. (formerly Conoco Energy Company) (the "Guarantor"), as primary
obligor and not merely as surety, hereby unconditionally guarantees (the
"Guarantee") (i) the due and punctual payment of the principal of and interest
on that certain Promissory Note of Conoco Inc. dated July 20, 1998 (the
"Note"), subject to any applicable grace periods, whether at maturity, by
acceleration or otherwise, the due and punctual payment of interest on the
overdue principal and interest, if any, on the Note, to the extent lawful, and
the due and punctual performance of all other obligations of the Issuer all in
accordance with the terms set forth in the Note and (ii) in case of any
extension of time of payment or renewal of the Note or any of such other
obligations, that the same will be promptly paid in full when due or performed
in accordance with the terms of the extension or renewal, whether at stated
maturity, by acceleration or otherwise (all such obligations guaranteed hereby
by the Guarantor being the "Guaranteed Obligations").

     This Guaranty is irrevocable, absolute, present and unconditional.  The
Guarantor guarantees that the Guaranteed Obligations will be paid strictly in
accordance with the terms of the Note regardless of any law, regulation or
order now or hereafter in effect in any jurisdiction affecting any of such
terms or the rights of the Payee with respect thereto.  The obligations of the
Guarantor under this Guaranty are independent of the Guaranteed Obligations,
and a separate action or actions may be

<PAGE>   20

brought and prosecuted against the Guarantor to enforce this Guaranty,
irrespective of whether any action is brought against the Issuer or any other
guarantor or whether the Issuer or any other guarantor is joined in any such
action or actions.  The liability of the Guarantor under this Guaranty shall be
absolute and unconditional irrespective of:

          (i)    any lack of validity or enforceability of the Note with respect
     to the Issuer or any agreement or instrument relating thereto;

          (ii)   any change in the time, manner or place of payment of, or in
     any other term of, all or any of the Guaranteed Obligations, or any other
     amendment or waiver of or any consent to departure from the Note;

          (iii)  the failure to give notice to the Guarantor of the occurrence
     of an Event of Default under the provisions of the Note;

          (iv)   any failure, omission, delay by or inability on the part of 
     the Payee to assert or exercise any right, power or remedy conferred on 
     the Payee in the Note;

          (v)    any change in the corporate structure, or termination,
     dissolution, consolidation or merger of the Issuer or any guarantor with 
     or into any other entity, the voluntary or involuntary


                                       2
<PAGE>   21

     liquidation, dissolution, sale or other disposition of all or
     substantially all the assets of the Issuer or the Guarantor, the
     marshaling of the assets and liabilities of the Issuer or any guarantor,
     the receivership, insolvency, bankruptcy, assignment for the benefit of
     creditors, reorganization, arrangement, composition with creditors, or
     readjustment of, or other similar proceedings affecting the Issuer or any
     guarantor, or any of the assets of any of them;

          (vi)  the assignment of any right, title or interest of the Payee in
     the Note to any other person; or

          (vii)  any other event or circumstance (including any statute of 
     limitations), whether foreseen or unforeseen and whether similar or
     dissimilar to any of the foregoing, that might otherwise constitute a
     defense available to, or a discharge of, the Issuer or a guarantor, other
     than payment in full of the Guaranteed Obligations; it being the intent of
     the Guarantor that its obligations hereunder shall not be discharged
     except by payment of all amounts owing pursuant to the Note.

This Guaranty shall continue to be effective or be reinstated, as the case may
be, if at any time any payment or performance with respect to any of the
Guaranteed Obligations is rescinded or must otherwise be returned by the Payee,
upon the insolvency, bankruptcy or reorganization of the Issuer or otherwise,
all as though such payment or performance had not been made or occurred.  The
obligations of the


                                       3
<PAGE>   22

Guarantor under this Guaranty shall not be subject to reduction, termination or
other impairment by any set-off, recoupment, counterclaim or defense or for any
other reason.

     The Guarantor hereby irrevocably waives, to the extent permitted by 
applicable law:

          (i)   promptness, diligence, notice of acceptance and any other notice
     with respect to any of the Guaranteed Obligations and this Guaranty;

          (ii)  any requirement that the Payee or any other person protect, 
     secure, perfect or insure any lien or any property subject thereto or
     exhaust any right or take any action against the Issuer or any other
     person or any collateral, or obtain any relief pursuant to the Note or
     pursue any other available remedy;

          (iii) all right to trial by jury in any action, proceeding or 
     counterclaim arising out of or relating to the Note;

          (iv)  any defense arising by reason of any claim or defense based 
     upon an election of remedies by the Payee which in any manner impairs,
     reduces, releases or otherwise adversely affects its subrogation,
     contribution or reimbursement rights or other rights to proceed against
     the Issuer or any other person; and

          (v)   any duty on the part of the Payee to disclose to the Guarantor
     any matter, fact or thing relating to the business, operation or condition
     of the Issuer and its assets now


                                       4
<PAGE>   23

     known or hereafter known by the Payee.

     IN WITNESS WHEREOF, the Guarantor has caused its duly authorized officer
to execute and deliver this Guarantee as of JULY 24, 1998.

                                       CONOCO INC.
                                       (FORMERLY CONOCO ENERGY COMPANY)


                                       By:
                                          ---------------------------------
                                       Name:   R.W. Goldman
                                       Title:  Senior Vice President


                                       5

<PAGE>   1
                                                                    EXHIBIT 10.3

                           EMPLOYEE MATTERS AGREEMENT

         Employee Matters Agreement (this "Agreement"), dated as of ______,
1998, by and among Conoco Inc. (formerly known as Conoco Energy Company), a
Delaware corporation ("Conoco") and E.I. du Pont de Nemours and Company, a
Delaware corporation ("DuPont").

         WHEREAS, the Board of Directors of DuPont has determined it is
appropriate and desirable to enter into the Restructuring, Transfer and
Separation Agreement dated as of ____________, 1998 (the "Separation
Agreement"), by and between DuPont and Conoco, pursuant to which, among other
things, DuPont will offer shares of Class A Common Stock, par value $.01 per
share (the "Class A Common Stock") of Conoco for sale to the public pursuant to
an initial public offering ("IPO") and in connection therewith DuPont and Conoco
will separate their respective businesses so that from and after the Effective
Date the Transferred Business will be held by Conoco and its Subsidiaries and
divisions (the "Separation"); and

         WHEREAS, in connection with such Separation and IPO, DuPont and Conoco
desire to provide for the transfer of certain assets and the assumption of
certain liabili ties and other matters relating to employee benefit plans,
agreements and arrangements.

         NOW, THEREFORE, in consideration of the mutual agreements, provisions
and covenants contained in this Agreement, the parties hereto hereby agree as
follows:


                                    ARTICLE I

                                   DEFINITIONS

         Section 1.01 General. As used in this Agreement, capitalized terms
defined immediately after their use shall have the respective meanings thereby
provided and the following terms shall have the meanings set forth below.
Capitalized terms used but not defined herein shall have the meanings set forth
in the Separation Agreement.

         "Affiliate" shall have the meaning set forth in the Separation
Agreement.

         "Code" shall mean the Internal Revenue Code of 1986, as amended.

         "Conoco Employees" shall mean (a) those persons who are employed as
officers or employees of the Transferred Business immediately prior to or
effective as of the




<PAGE>   2



Effective Date and (b) all former officers and employees of the Transferred
Business who, immediately prior to the termination of their employment, were
employed in the Transferred Business. In the event that on the Effective Date
(or if such person is no longer employed as of the Effective Date, then as of
the last date of such person's employment) any person shall be (or was) employed
in the Transferred Business, as well as in the Retained Business, such person
shall be considered a Transferred Employee if, but only if, on the Effective
Date (or if such person is no longer employed as of the Effective Date, then as
of the last date of such person's employment) such person's primary employment
shall be (or was) in the Transferred Business.

         "Conoco Retirement Plan" shall have the meaning set forth in Section
2.02.
         "Conoco Retirement Plan Participant" shall mean any Conoco Employee,
except a Conoco Employee who, as of the Effective Date, has an accrued benefit
under the DuPont Pension Plan which is solely a Title I benefit.

         "Delayed Company" shall have the meaning set forth in the Separation
Agreement.

         "DuPont Actuary" shall mean the enrolled actuary for the DuPont Pension
Plan.

         "DuPont Common Stock" shall mean the common stock, par value $0.30 per
share, of E.I. DuPont de Nemours and Company.

         "DuPont Pension Plan" shall mean the DuPont Pension and Retirement
Plan.

         "Effective Date" shall have the meaning set forth in the Separation
Agreement.

         "IRS" shall mean the Internal Revenue Service.

         "Ownership Reduction Date" shall mean the date on which DuPont and
Conoco cease to be in the same "controlled group of corporations" as defined in
Section 1563(a) of the Code.

         "Related Agreements" shall have the meaning set forth in the Separation
Agreement.

         "Retained Employees" shall mean all current and former officers and
employees of DuPont and its Affiliates, other than Conoco Employees.



                                        2

<PAGE>   3



         "Retained Subsidiary" shall have the meaning set forth in the
Separation Agreement.

         "Separation" shall have the meaning set forth in the recitals.

         "Transfer Amount" shall mean the amount transferred, pursuant to
Section 2.02 hereof, from DuPont Pension Plan to the Conoco Retirement Plan.

         "Transfer Date" shall have the meaning set forth in Section 2.02.

         "Transfer Guidelines" shall have the meaning set forth in Section 2.11.

         "Transferred Business" shall have the meaning set forth in the
Separation Agreement.

         "Transferred Business Company" shall have the meaning set forth in the
Separation Agreement.

         Section 1.02 Sections. References to a "Section" are, unless otherwise
specified, to one of the Sections of this Agreement.

         Section 1.03 Certain Constructions. References to the singular in this
Agreement shall refer to the plural and vice-versa and references to the
masculine shall refer to the feminine and vice-versa.


                                   ARTICLE II

                                EMPLOYEE BENEFITS

         Section 2.01 Liabilities and Obligations Relating to Employees. Except
as otherwise provided in this Agreement, with respect to claims relating to any
employee liability or obligation (including, without limitation, any such claim
relating to or arising under any employee benefit or compensation plan,
agreement, arrangement, or program, as well as accrued wages and workers'
compensation, holiday, vacation and disability benefits), as of the Effective
Date, (i) DuPont, or an appropriate Retained Subsidiary, shall assume and be
solely responsible for all such liabilities and obligations whatsoever with
respect to Retained Employees and (ii) Conoco, or an appropriate Transferred
Business Company


                                        3

<PAGE>   4



or Delayed Company, shall assume and be solely responsible for all such
liabilities and obligations whatsoever with respect to Conoco Employees.

         Section 2.02 DuPont's Pension and Retirement Plan.

         (a) Following the Effective Date, Conoco Employees shall continue to
participate in the DuPont Pension Plan on the same terms and conditions as
immediately prior to the Effective Date. As soon as practicable after, and in
any event within 90 days after, and effective as of, the Ownership Reduction
Date, Conoco shall establish a defined benefit pension plan (with terms and
conditions substantially comparable in all material respects to Title II of the
DuPont Pension Plan) and a related trust intended to qualify under Section
401(a) and Section 501(a) of the Code (the "Conoco Retirement Plan"). Effective
as of the Ownership Reduction Date, all Conoco Retirement Plan Participants
shall participate in the Conoco Retirement Plan. DuPont shall, within 180 days
following the Ownership Reduction Date, but in no event prior to receipt by
DuPont of written evidence of the establishment of the Conoco Retirement Plan
and the related trust ("Conoco Trust") by Conoco and either (A) the receipt by
DuPont of a copy of a favorable determination letter issued by the IRS with
respect to the Conoco Retirement Plan or (B) an opinion, in a form theretofore
agreed upon, of Conoco's counsel to the effect that the terms of the Conoco
Retirement Plan and Conoco Trust qualify under Section 401(a) and Section 501(a)
of the Code, direct the trustee of the trust under the DuPont Pension Plan
("DuPont Trust") to transfer (the date of such transfer hereinafter the
"Transfer Date"), in cash or in kind, as agreed to by DuPont and Conoco, from
the DuPont Trust to the trustee of the Conoco Trust, an amount estimated by the
DuPont Actuary to equal 90% of the Transfer Amount, as defined below. The
"Transfer Amount" shall mean the sum of (i) $820,000,000 and (ii) an amount
equal to (x) the investment gain of the DuPont Trust from the Effective Date to
the Transfer Date attributable to the Transfer Amount less (y) the benefit
payments made to Conoco Retirement Plan Participants between the Effective Date
and the Transfer Date, as determined by the DuPont Actuary. As soon as
practicable following the Transfer Date, but in no event later than 90 days
after such date, DuPont shall direct the trustee of the DuPont Trust to transfer
to the trustee of the Conoco Trust the excess of the Transfer Amount over the
actual amount previously transferred, plus interest on such excess at 9%
compounded daily from the Transfer Date. Notwithstanding anything contained
herein to the contrary, no transfer of assets shall take place until the 31st
day following the filing of all required Forms 5310-A in connection therewith.
Upon the receipt of the Transfer Amount (i) Conoco and the Conoco Retirement
Plan shall assume the liabilities of the DuPont Pension Plan for accrued
benefits of Conoco Retirement Plan Participants, theretofore the liability of
the DuPont Pension Plan, (ii) Conoco's participation in DuPont's Pension Plan
shall cease, (iii) neither Conoco nor any of its Affiliates


                                        4

<PAGE>   5



shall have any liability with respect to the DuPont Pension Plan, (iv) neither
DuPont nor any of its Affiliates shall have any liability with respect to the
accrued benefits of Conoco Retirement Plan Participants and (v) DuPont and the
DuPont Pension Plan shall retain all liabilities for accrued benefits of DuPont
Pension Plan participants who are not Conoco Retirement Plan Participants.

         (b) Notwithstanding anything herein to the contrary, in no event will
the Transfer Amount be less than the present value of the accrued benefits of
the Conoco Retirement Plan Participants, as calculated in accordance with
Section 414(1) of the Code and the regulations promulgated thereunder. The
calculation by DuPont Actuary shall be determinative but shall be subject to
review by Conoco and the DuPont Actuary shall provide the actuary selected by
Conoco with all the documentation reasonably necessary for Conoco to verify such
calculation. Conoco and DuPont shall provide each other with such records and
information as may be necessary or appropriate to carry out their obligations
under this Section or for the purposes of administration of the Conoco
Retirement Plan and DuPont Pension Plan and they shall cooperate in the filing
of documents required by the transfer of assets and liabilities described
herein.

         (c) In no event shall any amount transferred to the trustee of the
Conoco Retirement Plan be used for any purpose other than to provide benefits to
present or future employees of Conoco, and in no event shall any amount
transferred to the trustee of the Conoco Retirement Plan revert to Conoco
directly or indirectly.

         Section 2.03 Non-qualified Plans. Following the Effective Date, Conoco
Employees shall continue to participate in DuPont's Salary Deferral &
Restoration Plan (the "DuPont Restoration Plan") through December 31, 1998. As
soon as practicable following the Effective Date, and in any event no later than
January 1, 1999, Conoco shall establish a benefit restoration plan (the "Conoco
Thrift Restoration Plan") relating to the Thrift Plan for Employees of Conoco
Inc. (the "Conoco Thrift Plan") for the benefit of the Conoco Employees who
were, immediately prior to the Effective Date, participating in the DuPont
Restoration Plan. As of the Effective Date, (i) Conoco, or the appropriate
Transferred Business Company, shall assume and be solely responsible for the
liabilities and obligations relating to the Conoco Employees arising under the
DuPont Restoration Plan and (ii) DuPont, or the appropriate Retained Subsidiary,
shall assume and be solely responsible for the liabilities and obligations
relating to the Retained Employees arising under the DuPont Restoration Plan.

         Section 2.04 Foreign Pension Plans. With respect to any pension plan
maintained or sponsored by DuPont or any Affiliate for the benefit of foreign
employees in which only Conoco Employees participate, (i) Conoco or an
appropriate Trans-


                                        5
<PAGE>   6



ferred Business Company shall assume or retain such plan, the assets thereof and
the sole liability for each such pension plan and (ii) no additional assets
shall be transferred by DuPont or any Retained Subsidiary to Conoco, any
Transferred Business Company or such pension plan. With respect to any pension
plan maintained or sponsored by DuPont or any Affiliate for the benefit of
foreign employees in which Retained Employees and Conoco Employees participate
(a "Combined Foreign Pension Plan"), Conoco or an appropriate Transferred
Business Company shall make available (at such time on or following the
Effective Date as is determined by DuPont) to the Conoco Employees who are
participants in such Combined Foreign Pension Plan either (i) a comparable plan
upon the transfer from the Combined Foreign Pension Plan to such comparable plan
of an amount of assets calculated in accordance with all applicable laws, rules
and regulations; provided that the transfer of assets does not violate the terms
of such plan or cause underfunding or additional underfunding of such plan, or
(ii) such other arrangement as Conoco reasonably determines is appropriate under
the circumstances taking into account all applicable laws and the number of
Conoco Employees participating in such Combined Foreign Pension Plan. As of the
Effective Date, or upon such transfer of assets (if applicable), Conoco and the
applicable Conoco plan shall assume all liabilities for all accrued benefits
under the applicable Combined Foreign Pension Plan in respect of Conoco
Employees and each of DuPont and the applicable Combined Foreign Pension Plan
shall be relieved of all liabilities for such benefits.

         Section 2.05 Collective Bargaining Agreements. As of the Effective
Date, with respect to those collective bargaining agreements to which DuPont or
any of its Affiliates is a party and which cover Conoco Employees, Conoco shall
assume all liabilities and obligations of DuPont and each of its Affiliates
thereunder, but only to the extent that such liabilities and obligations relate
to any Conoco Employees.

         Section 2.06 Stock Options; SARs. Each Conoco Employee who (a) is
actively employed by Conoco or a Transferred Business Company as of the
Effective Date, (b) either (i) was an employee of Conoco or a Transferred
Business Company more than 20 days prior to the Effective Date or (ii) was
designated as an individual who would become a Conoco Employee and such
designation occurred more than 20 days prior to the Effective Date and (c) holds
an option to acquire shares of DuPont Common Stock ("DuPont Stock Option") or an
appreciation right with respect to DuPont Common Stock ("DuPont SAR") in each
case that is outstanding immediately prior to the Effective Date, whether or not
then vested or exercisable, shall be afforded an opportunity to make a one-time
election (made in accordance with such procedures and at such time as is
determined by DuPont and Conoco), effective as of the Effective Date, to cause
such DuPont Stock Option or DuPont SAR to be cancelled and to be granted an
option to acquire the number of shares of Conoco Common Stock (a "Newly


                                        6

<PAGE>   7
Granted Option") or an appreciation right with respect to Conoco Common Stock (a
"Newly Granted SAR"), as applicable, in each case issued (if applicable) by
Conoco, rounded up to the nearest whole share, determined by multiplying (i) the
number of shares of DuPont Common Stock subject to such DuPont Stock Option or
DuPont SAR immediately prior to the Effective Date by (ii) the New Grant Ratio,
at an exercise price per share of Conoco Common Stock (rounded to the nearest
fourth decimal) equal to the exercise price per share of such DuPont Stock
Option or DuPont SAR divided by the New Grant Ratio; provided, however, that in
the case of any DuPont Stock Option to which Section 421 of the Code applies by
reason of its qualification as an incentive stock option under Section 422 of
the Code, the number of shares of Conoco Common Stock subject to the Newly
Granted Option in respect of such DuPont Stock Option shall be rounded down to
the nearest whole share and the conversion formula shall otherwise be adjusted,
if necessary, to comply with Section 424(a) of the Code. After the Effective
Date, each Newly Granted Option and Newly Granted SAR shall be exercisable upon
the same terms and conditions as were applicable to the related DuPont Stock
Option or DuPont SAR immediately prior to the Effective Date except that terms
and conditions of the awards shall be appropriately adjusted to reflect Conoco
as the issuer. The cancellation and new grants described herein shall be
effected in compliance with applicable law, including laws of foreign
jurisdictions and, if such laws impose burdens or impediments to such
substitutions, the parties shall either agree to an alternative course of action
or no such opportunity shall be extended to relevant Conoco Employees.

         The New Grant Ratio shall be: (i) the average price of DuPont Common
Stock over the five trading days ending on the date on which the initial
offering price to the public of a share of Conoco Common Stock in the IPO is
determined (calculated as the average of the mean of the high and low prices on
each of these five days as reported on the New York Stock Exchange), divided by
(ii) the initial offering price to the public of a share of Conoco Common Stock
in the IPO, as set forth in the prospectus for such IPO.

         Section 2.07 Preservation of Rights to Amend or Terminate Plans. Except
as otherwise provided herein, no provision of this Agreement shall be construed
as a limitation on the right of DuPont or Conoco to amend any plan or terminate
its participation therein which DuPont or Conoco would otherwise have. No
provision of this Agreement shall be construed to create a right in any employee
or beneficiary of such employee under a plan that such employee or beneficiary
would not otherwise have under the terms of such plan itself.



                                       7

<PAGE>   8



         Section 2.08      Certain Liabilities.

         (a) Conoco or the appropriate Transferred Business Company shall assume
all liabilities arising out of or resulting from any claim by any Conoco
Employee which arises under federal, state or local statute (including, without
limitation, Title VII of the Civil Rights Act of 1964, the Civil Rights Act of
1991, the Age Discrimination in Employment Act of 1990, the Equal Pay Act, the
Americans with Disabilities Act of 1990, the Employee Retirement Income Security
Act of 1974 and all other statutes regulating the terms and conditions of
employment), regulation or ordinance, under the common law or in equity
(including any claims for wrongful discharge or otherwise), or under any policy,
agreement, understanding or promise, written or oral, formal or informal,
between DuPont or Conoco (or any Affiliate of DuPont or Conoco) and the Conoco
Employee, whether arising out of actions, events or omissions that occurred (or,
in the case of omissions, failed to occur) prior to, or after, the Effective
Date. DuPont or the appropriate Retained Subsidiary shall assume all liabilities
arising out of or resulting from any claim by any Retained Employee which arises
under federal, state or local statute (including, without limitation, Title VII
of the Civil Rights Act of 1964, the Civil Rights Act of 1991, the Age
Discrimination in Employment Act of 1990, the Equal Pay Act, the Americans with
Disabilities Act of 1990, the Employee Retirement Income Security Act of 1974
and all other statutes regulating the terms and conditions of employment),
regulation or ordinance, under the common law or in equity (including any claims
for wrongful discharge or otherwise), or under any policy, agreement,
understanding or promise, written or oral, formal or informal, between DuPont or
any of its Affiliates and the Retained Employee, whether arising out of actions,
events or omissions that occurred (or, in the case of omissions, failed to
occur) prior to, or after, the Effective Date.

         (b) Notwithstanding Section 2.08(a) above, (i) with respect to any
claim of a Conoco Employee relating to a liability or obligation arising under
the DuPont Savings and Investment Plan or any DuPont health benefit plan, which
claim arose while such Conoco Employee was an employee of DuPont or a Retained
Subsidiary, DuPont (and the applicable DuPont plan) or such Retained Subsidiary
(and the applicable Retained Subsidiary plan) shall retain and be solely
responsible for all such liabilities and obligations of such Conoco Employee and
(ii) with respect to any claim of a Retained Employee relating to a liability or
obligation arising under the Conoco Thrift Plan or any Conoco health benefit
plan, which claim arose while such Retained Employee was an employee of Conoco,
a Transferred Business Company or a Delayed Company, Conoco, such Transferred
Business Company or such Delayed Company (and the applicable Conoco plan,
Transferred Business Company plan or Delayed Company


                                        8

<PAGE>   9



plan) shall assume and be solely responsible for all such liabilities and
obligations of such Retained Employee.

         Section 2.09 Reimbursement. Conoco and DuPont acknowledge that DuPont
or a Retained Subsidiary, on the one hand, and Conoco or a Transferred Business
Company, on the other hand, may incur costs and expenses (including, without
limitation, contributions to plans and the payment of insurance premiums)
pursuant to any of the employee benefit or compensation plans, programs or
arrangements which are, as set forth in this Agreement, the responsibility of
the other party. Accordingly, DuPont and Conoco agree to reimburse each other,
as soon as practicable but in any event within 30 days of receipt from the other
party of appropriate verification, for all such costs and expenses reduced by
the amount of any agreed upon tax reduction or recovery of tax benefit realized
by DuPont or Conoco, as the case may be, in respect of the corresponding payment
made by it.

         Section 2.10 Indemnification. All liabilities retained or assumed by
Conoco pursuant to this Article II shall in each case be deemed to be Assumed
Liabilities, and all liabilities retained or assumed by DuPont pursuant to this
Article II shall in each case be deemed to be Retained Liabilities, and, in each
case, shall be subject to the indemnification provisions set forth in the
Separation Agreement.

         Section 2.11 Transfer of Employees

         (a) DuPont employees who transfer to and become employed by Conoco or
any Transferred Business Company and Conoco employees who transfer to and become
employed by DuPont or any Retained Subsidiary, in either case on the United
States payroll, prior to the Ownership Reduction Date shall be transferred in
accordance with the terms of the Transfer Guidelines in effect immediately prior
to the Effective Date (the "Transfer Guidelines") and such employees and their
beneficiaries and survivors will be granted the benefits provided by the
provisions of the DuPont Pension Plan and other employee benefit plans
pertaining to employees who have been transferred between DuPont and Conoco, as
provided in, and subject to the terms and conditions of, the Transfer
Guidelines.

         (b) If the sum of the Option Amount and $10.4 million (such sum being
the "Employment Benefits Adjustment Amount") is positive, Conoco shall, in the
manner set forth in Section 2.5(c) of the Separation Agreement, deliver a
promissory note to DuPont in an amount equal to the Employee Benefits Adjustment
Amount. If the Employee Benefits Adjustment Amount is negative, DuPont shall
instead pay to Conoco an amount in cash equal to the absolute value of the
Employee Benefits Adjustment Amount no later than 30 days following the
Effective Date. Not withstanding the foregoing, in the event that there occurs
a single transfer of 100 or more employees from Conoco to DuPont or from DuPont
to Conoco in the U.S. following the Effective Date but prior to the Ownership
Reduction Date, Conoco or DuPont, as applicable, shall


                                       9

<PAGE>   10



make a supplemental cash payment as soon as practicable following the Ownership
Reduction Date, the amount of which shall be calculated in accordance with
Appendix A hereto.

         Section 2.12 Thrift Plan. Following the Effective Date, the Conoco
Thrift Plan shall continue to include DuPont Common Stock as an investment
option until the Ownership Reduction Date and then shall continue to retain the
DuPont Common Stock fund for a period of no less than 5 years. Notwithstanding
the preceding sentence, nothing shall prevent Conoco from amending the Thrift
Plan to provide that new investments in DuPont Common Stock may be discontinued
after the Ownership Reduction Date.

         Section 2.13 Delayed Company Employees. Employees of a Delayed Company
who are Conoco Employees shall be eligible to participate in any new or existing
Conoco employee compensation and benefit plans, subject to the approval of
Conoco. Notwithstanding the preceding sentence, employees of a Delayed Company
who are Conoco Employees shall only be entitled to the benefit set forth in
Section 2.06 hereof to the extent such employees hold DuPont SARs and shall not
be entitled to such benefit to the extent such employees hold DuPont Stock
Options.


                                   ARTICLE III

                                  MISCELLANEOUS

         Section 3.01 Complete Agreement; Construction. This Agreement,
including the Exhibits hereto and the agreements and documents referred to
herein, shall constitute the entire agreement between the parties with respect
to the subject matter hereof and shall supersede all previous negotiations,
commitments and writings with respect to such subject matter. Notwithstanding
any other provisions in this Agreement or the Separation Agreement to the
contrary, in the event and to the extent that there shall be a conflict between
the provisions of the Separation Agreement and this Agreement, the provisions of
this Agreement shall control.

         Section 3.02 Guarantee of Subsidiaries' Obligations. DuPont shall cause
to be performed, and hereby guarantees the performance and payment of, all
actions, agreements, obligations and liabilities set forth herein to be
performed or paid by DuPont Subsidiaries and Conoco shall cause to be performed,
and hereby guarantees the performance and payment of, all actions, obligations
and liabilities set forth herein to be performed or paid by the Conoco
Subsidiaries.


                                       10

<PAGE>   11




         Section 3.03 Governing Law. This Agreement shall be governed by and
construed and enforced in accordance with the laws of the State of Delaware
(regardless of the laws that might otherwise govern under applicable principles
of conflicts law) as to all matters, including, without limitation, matters of
validity, construction, effect, performance and remedies.

         Section 3.04 Notices. All notices, requests, demands and other
communications under this Agreement shall be in writing and, unless otherwise
provided herein, shall be deemed to have been duly given (i) on the date of
service if served personally on the party to whom notice is given, (ii) on the
day of transmission if sent via facsimile transmission to the facsimile number
given below, provided telephonic confirmation of receipt is obtained promptly
after completion of transmission, (iii) on the business day after delivery to an
overnight courier service or the Express mail service maintained by the United
States Postal Service, provided receipt of delivery has been confirmed, or (iv)
on the fifth day after mailing, provided receipt of delivery is confirmed, if
mailed to the party to whom notice is to be given, by first class mail,
registered or certified, postage prepaid, properly addressed and return-receipt
requested, to the party as follows:

                  If to DuPont, to:
                           E.I. du Pont de Nemours and Company
                           1007 Market Street
                           Wilmington, DE  19898
                           (302) 773-5176
                           Attn:  Roger W. Arrington, Esq.
                           Associate General Counsel

                  With a copy to:
                           Skadden, Arps, Slate, Meagher & Flom, LLP
                           919 Third Avenue
                           New York, NY  10022
                           (212) 735-2000
                           Attn:  Lou R. Kling, Esq.
                           Eileen Nugent Simon, Esq.

                  If to Conoco:
                           Conoco Inc.
                           600 North Dairy Ashford
                           Houston, Texas 77079
                           (281) 293-1440
                           Attn:  R. A. Harrington
                           Senior Vice President, Legal, and General Counsel

                                       11

<PAGE>   12



                  With a copy to:
                           Baker & Botts, L.L.P.
                           One Shell Plaza
                           910 Louisiana
                           Houston, Texas 77002
                           (713) 229-1522
                           Attn:  Walter J. Smith, Esq.

Any party may change its address or fax number by giving the other party written
notice of its new address in the manner set forth above.

         Section 3.05 Amendments. This Agreement may be modified, amended or
supplemented only by written agreement of the parties.

         Section 3.06 Successors and Assigns. This Agreement and all of the
provisions hereof shall be binding upon and inure to the benefit of the parties
and their respective successors and permitted assigns, but neither this
Agreement nor any of the rights, interests or obligations hereunder shall be
assigned by either party without the prior written consent of the other party.

         Section 3.07 Termination. This Agreement may be terminated in the event
that the Separation Agreement is terminated and the Separation abandoned prior
to the Effective Date. In the event of such termination, neither party shall
have any liability of any kind to the other party.

         Section 3.08 No Third Party Beneficiaries. This Agreement is solely for
the benefit of the parties hereto and is not intended to confer upon any other
person except the parties hereto any rights or remedies hereunder.

         Section 3.09 Titles and Headings. Titles and headings to sections
herein are inserted for the convenience of reference only and are not intended
to be a part of or to affect the meaning of or interpretation of this Agreement.

         Section 3.10 Legal Enforceability. Any provision of this Agreement
which is prohibited or unenforceable in any jurisdiction shall, as to such
jurisdiction, be ineffective to the extent of such prohibition or
unenforceability without invalidating the


                                       12

<PAGE>   13



remaining provisions hereof. Any such prohibition or unenforceability in any
jurisdiction shall not invalidate or render unenforceable such provision in any
other jurisdiction.




                                       13

<PAGE>   14



         IN WITNESS WHEREOF, the parties have caused this Agreement to be duly
executed as of the day and year first above written.


                                         CONOCO INC.
                                         (Formerly known as Conoco Energy
                                         Company)


                                         By:
                                            -----------------------------------
                                         Name:
                                         Title:




                                         E.I. DU PONT DE NEMOURS AND COMPANY


                                         By:
                                            -----------------------------------
                                         Name:
                                         Title:



                                       14

<PAGE>   15


                      EMPLOYEE MATTERS AGREEMENT APPENDIX A

     Calculation of Settlement for Certain Retiree Benefits in the Event of
                   A Single Transfer Between Conoco and DuPont
           (of at Least 100 Employees Transferred in Either Direction)
       After the Effective Date, but Prior to the Ownership Reduction Date

This calculation presumes all eligible transferred employees will select DuPont
health and life insurance benefits ("OPEBs") when they retire. Accordingly, this
calculation typically results in a payment from Conoco to DuPont to cover a
pro-rata share of the estimated cost of future OPEBs attributable to Conoco
service. The pro-ration is based on an estimate of the number of projected total
years of Conoco service divided by the projected number of years of combined
Conoco and DuPont service. A payment would be payable to Conoco (or an offset to
the amount otherwise payable to DuPont) with respect to transfers from DuPont to
Conoco who have less then 15 years of combined service at the time of such
transfer.

<TABLE>
<CAPTION>

                                                                           DuPont to          DuPont to
                                                           Conoco to        Conoco              Conoco              Net
                                                             DuPont        Transfers          Transfers            Amount
                                                           Transfers      >=15 Years          <15 Years             Due
                                                           --------       ----------          ---------           --------
     <S>   <C>                                            <C>           <C>                  <C>                  <C>
     a)    Number of Transferees
     b)    Percent assumed to qualify for OPEBS*
     c)    Average prior service with receiving company
     d)    Average service with sending company
     e)    Average future service to age 55
     f)    Pro-ration factor                              [d/(c+d+e)]   [(c+e)/(c+d+e)]      [d/(c+d+e)]
     g)    Per capita cost at retirement age              $ 70,000        $ 70,000            $ 60,000
     h)    Amount due DuPont [a*b*f*g]                    $    --         $     --                 --
                                                          =========       =========                --             $     --
     i)    Amount due Conoco  [a*b*f*g]                                                       =========           $     --
                                                                                                                  ========
     j)    Net due DuPont (Conoco) [h-i]                                                                          $     --
                                                                                                                  ========
</TABLE>


*Note, percent assumed to qualify for OPEBs is per the following table:



             Average Age at            Percent Assumed
               Transfer                  to Qualify
             --------------            ---------------           
               Under 41                     75%
                41-45                       90% 
                46-50                       95%
                 51+                       100%




                                       15





<PAGE>   1
                                                                    EXHIBIT 10.4

                INFORMATION SYSTEMS AND TELECOMMUNICATION CARRIER
                         TRANSITIONAL SERVICES AGREEMENT


                  This INFORMATION SYSTEMS AND TELECOMMUNICATION CARRIER
TRANSITIONAL SERVICES AGREEMENT, entered into the ____ day of ____________,
1998, by and between E. I. DU PONT DE NEMOURS AND COMPANY, a Delaware
corporation, with its principal place of business at 1007 Market Street,
Wilmington, Delaware 19898 ("DuPont"), and CONOCO INC., a Delaware corporation,
with its principal place of business at 600 North Dairy Ashford, Houston, Texas
77079 ("Conoco") (Conoco and DuPont, individually, a "Party"; collectively, the
"Parties") and effective as of the date of the initial public offering of equity
in Conoco (the "Effective Date").

                  WHEREAS, prior to the Effective Date, DuPont has made certain
information system and telecommunication services available to Conoco and its
affiliates, subsidiaries and divisions; and

                  WHEREAS, Conoco has requested that after Conoco's initial
public offering certain of such services continue to be made available to Conoco
and its affiliates, subsidiaries and divisions pursuant to this Agreement; and

                  WHEREAS, DuPont and Conoco have agreed that such services be
made available on the terms and conditions set forth herein.

                  NOW, THEREFORE, subject to the terms, conditions, covenants
and provisions of this Agreement, DuPont and Conoco mutually covenant and agree
as follows:


ARTICLE 1         TRANSITIONAL SERVICES PROVIDED.

                  1.01  DuPont Services.

(a)      Upon the terms and subject to the conditions set forth in this
         Agreement, commencing on the Effective Date and throughout the Term (as
         defined in Section 5.01), DuPont shall provide to Conoco and its
         affiliates, subsidiaries and divisions the information systems services
         set forth in Appendix A (each, individually, a "DuPont Service";
         collectively, the "DuPont Services").

(b)      DuPont shall perform the DuPont Services exercising the same degree of
         care as it exercises in performing the same or similar services for its
         own account, with priority equal to that provided to its own businesses
         or those of any of its affiliates, subsidiaries or divisions. Nothing
         in this Agreement shall require DuPont to provide priority to Conoco or
         its affiliates, subsidiaries or divisions with respect to the DuPont
         Services over DuPont's businesses or those of any of its affiliates,
         subsidiaries or divisions; provided, however, that upon Conoco's
         request and DuPont's agreement, DuPont shall, in certain emergency
         situations, provide priority to Conoco or its affiliates, subsidiaries



<PAGE>   2

         or divisions with respect to a DuPont Services over DuPont's businesses
         or those of any of its affiliates, subsidiaries or divisions.

 (c)     Subject to Section 1.01(e), unless the Parties otherwise agree, DuPont
         shall not be required to provide:

         (i)       directly, any service to Conoco or its affiliates, 
              subsidiaries or divisions other than the DuPont Services;

         (ii)      increased volume with respect to any DuPont Service above the
              typical volume provided to Conoco in respect of such DuPont 
              Service immediately prior to the Effective Date;

         (iii)     any DuPont Service at a level of service that is higher than 
              the typical level of service, if any, that existed immediately 
              prior to the Effective Date in respect of such DuPont Service;

         (iv)      any DuPont Service to a location to which such DuPont Service
              was not provided immediately prior to the Effective Date; or

         (v)       any DuPont Service to any affiliate, subsidiary or division 
              of Conoco that was not receiving such DuPont Service immediately
              prior to the Effective Date.

(d)      DuPont may modify a DuPont Service to the extent such modification is
         applicable to DuPont's provision of such service for its own account;
         provided, however, that in the event that a modification by DuPont
         pursuant to this Section 1.01(d) is a material modification (as
         reasonably determined by DuPont), DuPont shall provide at least 30
         days' notice to Conoco prior to the date on which DuPont implements
         such modification.

(e)      In the event that Conoco requests DuPont to modify a DuPont Service,
         DuPont shall use reasonable efforts to implement such modification;
         provided, however, that Conoco shall pay to DuPont any and all actual
         incremental or additional costs and expenses incurred by DuPont in
         connection with the implementation of any such modification and
         provision of such modified DuPont Service.

                  1.02  Third Party Services.

 (a)     Upon the terms and subject to the conditions of this Agreement and any
         applicable agreements between DuPont and third party information
         systems service providers in effect as of the Effective Date (such
         agreements, collectively, the "Third Party IS Agreements"), commencing
         on the Effective Date and throughout the Term, DuPont shall provide to
         Conoco and its affiliates, subsidiaries and divisions, and Conoco and
         its affiliates, subsidiaries and divisions shall take from DuPont, the
         third party information systems services set forth in Appendix A
         (collectively, the "Third Party IS Services").

                                       2

<PAGE>   3


(b)      Upon the terms and subject to the conditions of this Agreement and any
         applicable agreements between DuPont and third party telecommunication
         carrier service providers in effect as of the Effective Date (such
         agreements, collectively, the "Third Party Carrier Agreements"),
         commencing on the Effective Date and until the expiration date of the
         applicable Third Party Carrier Agreement, DuPont shall provide to
         Conoco and its affiliates, subsidiaries and divisions, and Conoco and
         its affiliates, subsidiaries and divisions shall take from DuPont, the
         third party telecommunication carrier services set forth in Appendix A
         (collectively, the "Third Party Carrier Services") (the Third Party IS
         Agreements and Third Party Carrier Agreements, collectively, the "Third
         Party Services Agreements") (the Third Party IS Services and Third
         Party Carrier Services, collectively, the "Third Party Services") (the
         DuPont Services and Third Party Services, collectively, the
         "Transitional Services".

(c)      In the event that Conoco desires to continue to receive any Third Party
         Carrier Service after the expiration date of the Third Party Carrier
         Agreement under which such Third Party Carrier Service was provided to
         Conoco pursuant to this Agreement (such date being known as the
         "Expiration Date") (such Third Party Carrier Service being known as a
         "Renewal Third Party Carrier Service"), Conoco shall, no later than 150
         days prior to the applicable Expiration Date provide notice to DuPont
         of such desire. If DuPont agrees to provide such Renewal Third Party
         Carrier Service to Conoco, (i) the Parties shall work together prior to
         the Expiration Date to determine Conoco's requirements with respect to
         such Renewal Third Party Carrier Service and (ii) upon the agreement of
         the Parties, the Parties shall enter into a new agreement or
         agreements, as the case may be, in respect of such Third Party Carrier
         Service.

(d)      Subject to the terms and conditions of the applicable Third Party
         Services Agreement, except as the Parties otherwise agree, Conoco may
         request that a third party service provider provide to Conoco a new
         service or a modification to a Third Party Service and that DuPont
         provide its reasonable assistance to obtain such new service or
         modification; provided, however, that any request by Conoco pursuant to
         this Section 1.02(d) shall be made to DuPont or, upon the agreement of
         the Parties, directly to the applicable third party service provider;
         provided, further, that Conoco shall pay to DuPont any and all actual
         incremental or additional costs and expenses incurred by DuPont in
         connection with the (i) acquisition or implementation of any such new
         service or modified Third Party Service and (ii) provision of such new
         service or modified Third Party Service. Unless the Parties otherwise
         agree, any new services or modified Third Party Service requested by
         Conoco pursuant to this Section 1.02(d) shall be considered a Third
         Party IS Service or Third Party Carrier Service, as the case may be.

(e)      Notwithstanding anything to the contrary in this Agreement, in the
         event that during the Term any Third Party Services Agreement under
         which a Third Party Service is being provided, expires or is
         terminated, in whole or in part, by either DuPont or the applicable
         third party, DuPont shall be relieved of any obligations under this
         Agreement with respect to such Third Party Service, including the
         obligation to provide such Third Party Service to Conoco or its
         affiliates, subsidiaries or divisions; provided, however, that,

                                       3

<PAGE>   4

         unless the Parties otherwise agree, DuPont shall not be relieved of its
         obligations in the event that (i) DuPont terminates such Third Party
         Services Agreement for DuPont's convenience or (ii) the applicable
         third party service provider rightfully terminates such Third Party
         Services Agreement due to a default by DuPont. In the event that a
         material Third Party Service (as reasonably determined by DuPont) is
         terminated in accordance with this Section 1.02(e), DuPont will provide
         notice to Conoco of such termination as soon as reasonably practicable.

                  1.03  Transfer of Services.

(a)      DuPont may transfer the provision of any DuPont Service to a third
         party service provider; provided, however, that such transfer does not
         result in the diminution in the provision of such transferred DuPont
         Service. After the transfer of the provision of a DuPont Service to a
         third party service provider pursuant to this Section 1.03(a), such
         transferred DuPont Service shall be considered a Third Party IS
         Service.

(b)      DuPont may transfer the provision of any Third Party Service to DuPont;
         provided, however, that such transfer does not result in the diminution
         in the provision of such transferred Third Party Service. After the
         transfer of the provision of a Third Party Service to DuPont pursuant
         to this Section 1.03(b), such transferred Third Party Service shall be
         considered a DuPont Service.

(c)      DuPont may transfer the provision of any Third Party Service to another
         third party service provider; provided, however, that such transfer
         does not result in the diminution in the provision of such transferred
         Third Party Service.

(d)      The DuPont Services shall not include any of the Third Party Services
         and the Third Party Services shall not include any of the DuPont
         Services.

(e)      In the event that the provision of a Third Party Service provided by
         CSC or Andersen Consulting LLP ("Andersen") is transferred pursuant to
         this Section 1.03, DuPont shall provide prior notice to Conoco of such
         transfer.

                  1.04  Representatives.

(a)      No later than 30 days after the Effective Date, DuPont and Conoco shall
         each designate a representative to act as the primary contact person
         with respect to the provision of the Transitional Services (the
         "Service Coordinators").

(b)      No later than 30 days after the Effective Date, DuPont and Conoco shall
         each designate a representative to act as the primary global contact
         person with respect to the provision of the Transitional Services
         worldwide (the "Global Service Coordinators").

(c)      All communications relating to the provision of any Transitional
         Services shall be directed to the applicable Service Coordinator or its
         designee.

                                       4

<PAGE>   5


(d)      Each Party shall provide 30 days' prior notice to the other Party of
         any change to its designated Service Coordinator and Global Service
         Coordinator.

                  1.05  No Obligation to Continue to Use Certain Services.

(a)      Conoco shall provide notice to DuPont of its intent to terminate its
         receipt of a Third Party IS Service or DuPont Service prior to the
         fifteenth day of the applicable calendar month, with such termination
         to be effective no earlier than the last day of the following calendar
         month; provided, however, that subject to Conoco entering into an
         agreement or agreements with CSC pursuant to Section 5.04, Conoco shall
         not (i) terminate its receipt of any non-application CSC Service or
         (ii) reduce its demand for a non-application CSC Service (except as may
         result from Conoco's normal demand fluctuations for any such CSC
         Service as compared to the 12 months prior to the Effective Date).

(b)      In the event any Third Party IS Service or DuPont Service is terminated
         by Conoco pursuant to this Section 1.05, DuPont may, in its sole
         discretion, terminate any directly related Transitional Services by
         providing 30 days' prior notice of such termination to Conoco.

(c)      Unless the Parties otherwise agree, if any Third Party IS Service or
         DuPont Service is terminated by Conoco or DuPont, Conoco may not
         reinstitute its receipt of such Third Party IS Service or DuPont
         Service, as the case may be, and DuPont shall have no obligation to
         provide such Third Party IS Service or DuPont Service, as the case may
         be, to Conoco or its affiliates, subsidiaries or divisions under this
         Agreement.

(d)      Conoco shall not (i) terminate its receipt of any Third Party Carrier
         Service or (ii) reduce its demand for any Third Party Carrier Service
         (except as may result from Conoco's normal demand fluctuations for any
         such Third Party Carrier Service as compared to the 12 months prior to
         the Effective Date).

                  1.06 DuPont Access. Conoco shall provide DuPont and its
representatives and agents with access to its equipment, office space, plants
and any other areas necessary for the provision of the Transitional Services
(the "Conoco Sites"); provided, however, that such access shall not unreasonably
interfere with the conduct of Conoco's business. DuPont and its representatives
and agents shall comply with all of Conoco's standard policies and procedures as
in effect from time to time with respect to the Conoco Sites, including
procedures for the physical security of the Conoco Sites; provided that Conoco
shall provide notice to DuPont of such policies and procedures.

                  1.07 Facilities. Except as otherwise provided in any lease
agreement between the Parties, each Party shall provide the other Party, without
cost to such other Party, reasonable use of any incidental office space
necessary for the performance of such other Party's obligations under this
Agreement.

                                       5

<PAGE>   6



ARTICLE 2         COMPENSATION.

                  2.01 Consideration.

(a)      As consideration for the provision of each Transitional Service, Conoco
         shall pay to DuPont, or its designees, the applicable fees in
         accordance with the provisions set forth in Appendix A.

(b)      Except as expressly set forth in this Agreement, there shall be no
         charges or fees payable by Conoco in respect of DuPont's performance of
         its obligations pursuant to this Agreement.

                  2.02  Taxes.

(a)      Income, Profits, and Capital Gains Taxes. DuPont shall pay all income
         and profits taxes and taxes on capital gains, and related fines,
         penalties and interest thereon assessed or levied against DuPont by any
         government authority or any political subdivision thereof or by the
         government of any other country against DuPont or DuPont's
         subcontractors in respect of the Transitional Services performed under
         this Agreement.

(b)      Other Taxes. Any applicable sales, use, gross receipt, gross income, or
         any other excise tax imposed by any taxing jurisdiction covered by this
         Agreement shall be paid by the Party who is liable for the tax
         according to the laws of the jurisdiction involved.

                  2.03  Administrative Services.

(a)      Conoco shall provide to DuPont, at no cost or expense to DuPont, the
         two and one half individuals (each, an "Incumbent Employee") that were
         performing certain administrative services in connection with DuPont's
         provision of the Transitional Services (the "Administrative Services")
         as of the Effective Date. As of the Effective Date, the Incumbent
         Employees shall be exclusively dedicated to perform the Administrative
         Services on a full-time basis. In the event that during the Term an
         Incumbent Employee ceases, in whole or in part, for any reason, to
         provide the Administrative Services, Conoco shall either (i) on the
         date that such Incumbent Employee ceases to provide the Administrative
         Services, provide to DuPont a full-time equivalent to replace such
         Incumbent Employee (such full-time equivalent being known as a
         "Replacement FTE") acceptable to DuPont or (ii) pay to DuPont
         $10,417.00 per month for each month in which Conoco does not provide a
         Replacement FTE acceptable to DuPont.

(b)      Conoco may not remove a Replacement FTE unless DuPont consent to such
         removal or such Replacement FTE (i) voluntarily resigns from Conoco,
         (ii) is dismissed by Conoco or (iii) dies or is unable to work due to
         his or her disability. In the event that DuPont consents to the removal
         of a Replacement FTE or such Replacement FTE otherwise ceases to
         provide the Administrative Services pursuant to the preceding sentence,
         Conoco shall (x) on the date that such Replacement FTE ceases to
         provide the Administrative Services, provide to DuPont another
         Replacement FTE acceptable to DuPont or (y) pay to DuPont $10,417.00
         per month for each month in which Conoco does not provide a Replacement
         FTE acceptable to

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<PAGE>   7

DuPont or (y) pay to DuPont $10,417.00 per month for each month in which Conoco
does not provide a Replacement FTE acceptable to DuPont.

(c)      In the event that Conoco enters into a services agreement or agreements
         with CSC in accordance with Section 5.04, Conoco's obligations to
         provide Incumbent Employees, Replacement FTEs or make payments to
         DuPont pursuant to Section 2.03(a) and Section 2.03(b) shall cease 90
         days after the date on which such agreement or agreements with CSC are
         entered into by Conoco and CSC .

                  2.04  Invoicing and Payment.

(a)      Within 30 days after the last day of each month of the Term, DuPont, or
         its designees, shall invoice Conoco for the fees in respect of the
         Transitional Services performed during that month (the "Invoices");
         provided, however, that any third party service provider that directly
         invoiced Conoco as of the Effective Date shall continue to directly
         invoice Conoco during the Term. Conoco's billing address shall be set
         forth in Appendix C.

(b)      Conoco shall pay all undisputed amounts contained in the Invoices
         within 30 days after receipt thereof less any amount Conoco is required
         by law to withhold or deduct; provided, however, that if any third
         party service provider directly sends an Invoice to Conoco pursuant to
         Section 2.04(a), then Conoco shall comply with the payment provisions
         of the applicable Third Party Services Agreement under which such
         Invoice was sent. Any payments made to DuPont in accordance with this
         Section 2.04 shall not prejudice Conoco's right to subsequently dispute
         such payments.

(c)      In the event that Conoco disputes an Invoice with respect to:

         (i)            a DuPont Service, Conoco shall, within 30 days of its
                  receipt of the disputed Invoice, notify DuPont of the amount
                  in dispute and specify Conoco's complaint. Conoco may withhold
                  payment of such amounts in dispute without interest until the
                  dispute is resolved; or

         (ii)           a Third Party Service, Conoco may dispute such Invoice
                  to the extent permitted under, and in accordance with, the
                  terms and conditions of the applicable Third Party Services
                  Agreement; provided, however, that such dispute shall not
                  adversely affect DuPont's receipt of services or payment
                  obligations, or result in a diminution in any of its rights or
                  remedies, under such Third Party Services Agreement.

         Upon resolution of any dispute pursuant to this Section 2.04(c), Conoco
         shall promptly pay to DuPont or the applicable third party provider, as
         the case may be, any undisputed withheld amounts owed to DuPont or such
         third party service provider.

(d)      If any undisputed Invoice is not paid by Conoco in accordance with
         Section 2.04(b), upon 15 days' notice to Conoco, DuPont may, in its
         sole discretion, without any liability

                                       7

<PAGE>   8

         or expense to Conoco or any entity by or through Conoco, immediately
         cease providing the Transitional Services for which such Invoice
         related until such Invoice is paid in full by Conoco. Nothing in this
         Section 2.04(d) shall affect DuPont's right or ability to terminate
         this Agreement as set forth in Article 5.

(e)      In the event that DuPont is invoiced by Conoco in respect of any of the
         Third Party Services set forth in Appendix D, DuPont shall pay all
         undisputed amounts contained in such invoice within 30 days after
         receipt thereof less any amount DuPont is required by law to withhold
         or deduct. Any payments to Conoco in accordance with this Section
         2.04(e) shall not prejudice DuPont's right to subsequently dispute such
         payments. In the event that DuPont disputes an invoice by Conoco,
         DuPont shall, within 30 days of its receipt of such disputed invoice,
         notify Conoco of such dispute and specify DuPont's complaint. DuPont
         may withhold payment of such amounts in dispute without interest until
         the dispute is resolved. Upon resolution of any dispute pursuant to
         this Section 2.04(e), DuPont shall promptly pay to Conoco any
         undisputed withheld amounts owed to Conoco.

                   2.05  Proration. All periodic fees or charges under this
Agreement are to be computed on a calendar month basis and shall be prorated on
a per diem basis for any partial month.

                   2.06  One-Time Payment to Conoco. No earlier than December 1,
1998 and no later than December 15, 1998, DuPont shall pay to Conoco
$6,400,000.00 payable by wire transfer of immediately available funds at a bank
designated by Conoco and in accordance with Conoco's reasonable instructions.


ARTICLE 3          LIMITATION OF LIABILITY AND WARRANTY.

                   3.01  DuPont Liability.

(a)      Each of the Parties shall be liable to the other for any direct damages
         arising out of or relating to its performance or failure to perform
         under this Agreement; provided, however, that the aggregate liability
         of a Party to the other Party, whether based on an action or claim in
         contract, equity, negligence, tort or otherwise, for any event, act or
         omission shall not exceed an amount equal to the greater of (i)
         $250,000.00 and (ii) 12 times the average aggregate monthly fees (based
         on calendar months) in respect of the DuPont Services paid by Conoco to
         DuPont since the Effective Date; provided, however, that the limitation
         on liability set forth in this Section 3.01(a) shall not apply to (x)
         the failure of Conoco to make payments to DuPont, or its designees, due
         under this Agreement, (y) breaches of Article 4, Section 1.05, Section
         5.04 or Section 7.17 or (z) indemnification claims, as set forth in
         Article 6.

(b)      Notwithstanding anything to the contrary contained herein, in the event
         DuPont commits an error with respect to, or incorrectly performs or
         fails to perform, any DuPont Service, DuPont shall, at Conoco's
         request, use reasonable efforts to correct such performance or

                                       8

<PAGE>   9

         failure to perform; provided, however, that DuPont shall have no
         obligation to recreate any lost or destroyed data to the extent such
         data cannot be cured by such performance.

(c)      Notwithstanding anything to the contrary contained herein, DuPont shall
         not be liable to Conoco for any act or omission of any third party in
         connection with such third party (other than directly due to a default
         by DuPont in any agreement between DuPont and such third party)
         providing a Transitional Service.

                  3.02  Third Party Liability.

(a)      Conoco and its affiliates, subsidiaries and divisions shall irrevocably
         (i) assign and convey to DuPont, or its designee, without further
         consideration, any and all actions or claims arising out of or relating
         to the provision of a Transitional Service by a third party and (ii)
         waive any rights and remedies Conoco or its affiliates, subsidiaries or
         divisions may have with respect to any such actions or claims. In the
         event that DuPont recovers any damages in connection with an action or
         claim assigned to DuPont pursuant to this Section 3.02(a), DuPont shall
         pay to Conoco the portion of such damages attributable to such assigned
         action or claim less any amounts owed to DuPont in accordance with the
         following sentence. Conoco shall reimburse DuPont for any costs or
         expenses (including attorneys' fees and expenses) or liability or
         damages (in respect of any action or claim based on Conoco's acts or
         failure to act) incurred by DuPont in connection with DuPont bringing
         an action or claim on behalf of Conoco pursuant to this Section
         3.02(a).

(b)      Conoco acknowledges and agrees that with respect to any and all actions
         or claims, by or on behalf of Conoco or its affiliates, subsidiaries or
         divisions against a third party with respect to, or in connection with,
         such third party providing a Transitional Service, the aggregate
         liability of any such third party, whether based on an action or claim
         in contract, equity, negligence, tort or otherwise, for any event, act
         or omission shall not exceed an amount equal to the lesser of (i) the
         limitation on damages set forth in the applicable Third Party Services
         Agreement under which such action or claim relates and (ii) 12 times
         the average monthly amount (based on calendar months) paid by, or
         attributable to, Conoco under the applicable Third Party Services
         Agreement under which such action or claim relates.

                  3.03  CONSEQUENTIAL DAMAGES. NOTWITHSTANDING ANYTHING TO THE
CONTRARY CONTAINED HEREIN OR AT LAW OR IN EQUITY, NEITHER PARTY SHALL BE LIABLE
FOR, NOR SHALL THE MEASURE OF DAMAGES INCLUDE, ANY PUNITIVE, SPECIAL, INDIRECT,
INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR
LOSS OF BUSINESS PROFITS, BUSINESS INTERRUPTION OR ANY OTHER LOSS) ARISING OUT
OF OR RELATING TO ITS PERFORMANCE OR FAILURE TO PERFORM UNDER THIS AGREEMENT.

                  3.04  Year 2000. Subject to the limitation of liability set
forth in Section 3.01 and exculpation of liability set forth in Section 3.03,
DuPont represents and warrants that the DuPont Services shall not be interrupted
to the extent such interruption is caused by the failure of

                                       9

<PAGE>   10

any software, hardware or equipment, in each such case, within DuPont's control,
but excluding any software, hardware or equipment provided or maintained by a
third party, to account for all calculations using a century and date sensitive
algorithm for the year 2000 and the fact that the year 2000 is a leap year (a
"Year 2000 Problem"). Notwithstanding anything to the contrary in this
Agreement, DuPont shall not be liable for any damages arising out of or relating
to any Year 2000 Problem that is caused by circumstances outside of DuPont's
reasonable control. In the event that Conoco does not accept modifications, in
whole or in part, by DuPont, or its designee, to any DuPont Service to avoid or
remedy a Year 2000 Problem and applicable to DuPont's provision of such services
for its own account, DuPont may cease to provide such DuPont Service to Conoco,
until such time as Conoco accepts such modification.

                   3.05  DISCLAIMER. EXCEPT AS SPECIFIED IN SECTION 3.04, DUPONT
MAKES NO OTHER WARRANTIES WITH RESPECT TO THE TRANSITIONAL SERVICES AND
EXPLICITLY DISCLAIMS ALL OTHER REPRESENTATIONS AND WARRANTIES, EXPRESS OR
IMPLIED, INCLUDING THE REPRESENTATIONS AND WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A SPECIFIC PURPOSE.


ARTICLE 4          CONFIDENTIALITY.

                   4.01  Obligation. With respect to confidential information
disclosed in connection with this Agreement, Conoco and its affiliates,
subsidiaries and divisions shall comply with the provisions in this Article 4;
provided, however, that in the event that any confidential information is
disclosed in connection with Conoco's or its affiliates', subsidiaries' or
divisions' receipt of a Third Party Service, Conoco and its affiliates,
subsidiaries and divisions shall also comply with any confidentiality provisions
under the applicable Third Party Services Agreement that are in addition to, or
more restrictive than, the provisions in this Article 4. DuPont shall provide to
Conoco the applicable confidentiality provisions from such Third Party Services
Agreements.

                   4.02  Confidentiality. In addition to any obligations of
confidentiality pursuant to other agreements between the Parties, the Parties
shall treat any confidential information disclosed in connection with this
Agreement in accordance with the terms and conditions set forth in Appendix E.


ARTICLE 5          TERM AND TERMINATION.

                   5.01  Term. This Agreement shall commence on the Effective
Date and remain in full force and effect until the date 24 months after the
Effective Date (the "End Date") (the "Term") or such earlier date upon which all
of the Transitional Services are terminated by Conoco in accordance with Section
1.05 or this Agreement is terminated in accordance with Section 5.02 or Section
7.11.



                                       10

<PAGE>   11

                   5.02  Termination.

(a)      If either Party defaults in the performance of any of its obligations
         under this Agreement (the "Defaulting Party"), the other Party (the
         "Non-Defaulting Party") may give notice to the Defaulting Party
         specifying the nature of such default and stating that the
         Non-Defaulting Party intends to terminate this Agreement (a "Default
         Notice"). If such default is not cured within 45 days of the date on
         which the Default Notice was provided, the Non-Defaulting Party may
         immediately terminate this Agreement upon notice to the Defaulting
         Party.

(b)      Either Party may immediately terminate this Agreement by giving notice
         to the other Party upon the occurrence of any of the following events:

        (i)    the other Party enters into proceedings in bankruptcy or
             insolvency;

        (ii)   the other Party shall make an assignment of this Agreement for
             benefit of creditors;

        (iii)  a petition is filed against the other Party under a bankruptcy
             law, a corporate reorganization law, or any other law for relief as
             a debtor (or similar law in purpose or effect); or

        (iv)   the other Party enters into liquidation or dissolution
             proceedings.

(c)      In the event of a (i) consolidation or merger of Conoco with or into
         any entity, other than an affiliate of Conoco, (ii) sale, transfer or
         other disposition of all or substantially all of the assets of Conoco
         or (iii) acquisition by any entity, or group of entities acting in
         concert (excluding acquisitions (x) by pension and mutual funds in
         which the trustees of such funds are not entitled to vote the
         securities or other interests of Conoco or (y) of securities of Conoco
         pursuant to a public offering of such securities), or beneficial
         ownership of 20 percent or more of the outstanding voting securities of
         Conoco, upon 30 days' prior notice to Conoco, DuPont may terminate any
         Transition Service that is provided by or through a DuPont information
         technology system (i.e., with respect to this Section 5.02(c), DuPont
         may not terminate any Third Party Service that is provided by CSC or
         any other third party that is not provided by or through a DuPont
         information technology system).

                  5.03  DUPONT LIABILITY DISCLAIMER. DUPONT SHALL HAVE NO
LIABILITY OF ANY KIND OR NATURE WHATSOEVER (INCLUDING, WITHOUT LIMITATION,
INDIRECT, CONSEQUENTIAL, SPECIAL, INCIDENTAL OR PUNITIVE DAMAGES) TO CONOCO, OR
TO ANYONE CLAIMING BY OR THROUGH CONOCO, FOR DUPONT'S CEASING TO PROVIDE ANY
TRANSITIONAL SERVICE UPON THE EXPIRATION OF THIS AGREEMENT (AND ANY EXTENSION
THEREOF) OR THE TERMINATION OF A TRANSITIONAL SERVICE IN ACCORDANCE WITH SECTION
1.02 OR SECTION 1.05 OR THE TERMINATION OF THIS AGREEMENT IN ACCORDANCE WITH
SECTION 5.02, SECTION 7.07 OR SECTION 7.11. CONOCO SHALL INDEMNIFY DUPONT FROM
AND HOLD DUPONT HARMLESS AGAINST AND WAIVES ANY AND

                                       11

<PAGE>   12

ALL RIGHTS, AT LAW OR IN EQUITY, THAT IT MAY HAVE TO BRING ANY SUIT, INCLUDING,
BUT NOT LIMITED TO, INJUNCTIVE RELIEF, OR TO ANY CLAIMS, DAMAGES, LOSS, COSTS
(INCLUDING ATTORNEYS' FEES AND EXPENSES), ACTIONS, OR LIABILITY AGAINST DUPONT
OR DUPONT'S EMPLOYEES, AGENTS, ASSIGNEES, SUBSIDIARIES OR AFFILIATES ARISING OUT
OF DUPONT'S CEASING TO PROVIDE ANY TRANSITIONAL SERVICE UPON THE EXPIRATION OF
THIS AGREEMENT (AND ANY EXTENSION THEREOF) OR THE TERMINATION OF A TRANSITIONAL
SERVICE IN ACCORDANCE WITH SECTION 1.02 OR SECTION 1.05 OR THE TERMINATION OF
THIS AGREEMENT IN ACCORDANCE WITH SECTION 5.02, SECTION 7.07 OR SECTION 7.11.

                  5.04  Conoco Services Agreements. Conoco shall enter into a
services agreement or agreements with CSC as described in the Letter Agreement
entered into by and between CSC and Conoco on September 15, 1998, and set forth
in Appendix B (the "Letter Agreement"). Any breach of the Letter Agreement by
Conoco shall be deemed a breach of this Agreement.

                  5.05  Survival of Certain Obligations. Without prejudice to
the survival of the other agreements of the Parties, the terms of Section 1.05,
Section 2.01, Section 2.03 (in respect of payments due by Conoco to DuPont),
Article 4, Section 5.03, Section 5.04, Section 5.05, Section 6.02, Section 7.03,
Section 7.05, Section 7.09, Section 7.16, Section 7.17 and Article 10 shall
survive the expiration or any termination of this Agreement.


ARTICLE 6         INDEMNITIES.

                  6.01  Indemnity by the Parties for Third Party Claims. Each
Party (the "Indemnifying Party") shall indemnify the other Party from and hold
the other Party harmless against any losses, damages, liability, costs or
expenses (including attorneys' fees and expenses) arising out of or relating to
any third party claim:

(a)      relating to personal injury (including death) or tangible property
         damage resulting from the Indemnifying Party's or its agents' acts or
         omissions; provided, however, that in the event any such liability is
         the result of the acts or omissions of both DuPont and Conoco, each of
         DuPont and Conoco shall be liable to indemnify the other only for its
         proportional fault;

(b)      relating to work-related injury (except as may be covered by the
         Indemnifying Party's workers' compensation plan) or death, regardless
         of the cause or reason thereof, and regardless of the negligence of the
         other Party; or

(c)      relating to any duties or obligations of the other Party or its agents
         accruing after the Effective Date with respect to a third party.

Each Party shall indemnify the other Party from any costs and expenses incurred
in connection with the enforcement of this Section 6.01.

                                       12

<PAGE>   13


                  6.02  Term of Indemnity and Filing of Actions. The indemnities
contained in this Article shall survive for a period of three years after the
expiration or termination of this Agreement, and any claim for indemnity under
this Article must be made by notice to the Indemnifying Party within one year
after the discovery thereof.


ARTICLE 7         MISCELLANEOUS.

                  7.01  Amendments. This Agreement shall not be supplemented,
amended or modified in any manner whatsoever (including by course of dealing or
of performance or usage of trade) except in a writing signed by an authorized
representative of each of the Parties.

                  7.02  Successors and Assignment. This Agreement shall be
binding upon and inure to the benefit of the Parties and their respective
successors and permitted assigns. No Party shall assign this Agreement or any
rights herein without the prior consent of the other Party, which may be
withheld for any or no reason.

                  7.03  Texas Deceptive Trade Practices - Consumer Protection
Act.

(a)      DuPont and Conoco have each assessed their respective rights,
         liabilities, and obligations under the Texas Deceptive Trade Practices
         - Consumer Protection Act as set out in Texas Business & Commerce Code
         Annotated Section 17.41 et seq. (Vernon's) as interpreted by applicable
         case law (the "Act"). DuPont and Conoco each agree that the Act does
         not apply to either DuPont or Conoco because neither DuPont nor Conoco
         qualifies as a "Consumer" under Section 17.45(4) of the Act. However,
         in the event that either DuPont or Conoco is found to be a consumer
         under the Act, each of them waive their rights under the Act pursuant
         to Section 24(b) of the Act. In this regard, DuPont and Conoco each
         represent to one another that (i) neither of them is in a significantly
         disparate bargaining position and (ii) each of them is represented by
         legal counsel in seeking or acquiring the goods or services under this
         Agreement.

(b)      WAIVER OF CONSUMER RIGHTS. EACH OF DUPONT AND CONOCO WAIVES ITS RIGHTS
         UNDER THE DECEPTIVE TRADE PRACTICES - CONSUMER PROTECTION ACT, SECTION
         17.41 ET SEQ., BUSINESS & COMMERCE CODE, A LAW THAT GIVES CONSUMERS
         SPECIAL RIGHTS AND PROTECTIONS. EACH OF DUPONT AND CONOCO, AFTER
         CONSULTATION WITH AN ATTORNEY OF ITS OWN SELECTION, VOLUNTARILY
         CONSENTS TO THIS WAIVER.

                                       13

<PAGE>   14


                  7.04  Notices. All notices, consents, requests, approvals,
designations and other communications provided for or required herein, and all
legal process in regard thereto, must be in writing and shall be deemed validly
given, made or served, (a) when delivered personally or sent by telecopy to the
facsimile number indicated below with a required confirmation copy sent in
accordance with this Section 7.04(c); (b) on the next business day after
delivery to a nationally-recognized express delivery service with instructions
and payment for overnight delivery; or (c) on the fifth day after deposited in
any depository regularly maintained by the United States postal service, postage
prepaid, certified or registered mail, return receipt requested, addressed to
the following addresses (i.e., the Service Coordinators) or to such other
address as the Party to be notified shall have specified to the other Party in
accordance with this Section:

                  If to DuPont:

                  E. I. du Pont de Nemours and Company
                  Route 141 & 48
                  Wilmington, Delaware 19805, USA
                  Attention:        Lisa Palser
                  Fax number:       (302) 992-5929

                  With copy to:
                  Attention:        David Bankston
                  Fax number:       (302) 992-5929

                  If to Conoco:

                  Conoco Inc.
                  600 North Dairy Ashford
                  Houston, TX  77079
                  Attention:        W. R. Downing
                  Fax number:       (281) 293-2722

                  With copy to:
                  Attention:        Becky Hance
                  Fax number:       (281) 293-2722

                  7.05  Governing Law. This Agreement and the rights and
obligations of the Parties shall be governed by and construed in accordance with
the laws of the United States of America and the State of Delaware, and shall
not be governed by the United Nations Convention on Contracts for the
International Sale of Goods.

                  7.06  Headings. The various headings used in this Agreement
are for convenience only and are not to be used in interpreting the text of the
Articles or Sections in which they appear or to which they relate.

                                       14

<PAGE>   15


                  7.07  Severability. Wherever possible, each provision of this
Agreement shall be interpreted in such a manner as to be effective and valid
under applicable law. If any portion of this Agreement is declared invalid for
any reason in any jurisdiction, such declaration shall have no effect upon the
remaining portions of this Agreement, which shall continue in full force and
effect as if this Agreement had been executed with the invalid portions thereof
deleted; provided, however, that the entirety of this Agreement shall continue
in full force and effect in all other jurisdictions.

                  7.08  Counterparts. This Agreement may be executed in two or
more counterparts, each of which shall be deemed an original, and all of which
shall constitute one and the same instrument.

                  7.09  Rights of the Parties. Nothing expressed or implied in
this Agreement is intended or shall be construed to confer upon or give any
person or entity, other than the Parties and their respective subsidiaries and
affiliates, as the case may be, any rights or remedies under or by reason of
this Agreement or any transaction contemplated thereby.

                  7.10  Reservation of Rights. Either Party's waiver of any of
its rights or remedies afforded hereunder or at law is without prejudice and
shall not operate to waive any other rights or remedies which that Party shall
have available to it, nor shall such waiver operate to waive the Party's rights
to any remedies due to a future breach, whether of a similar or different nature
(subject to any applicable limitations at law or otherwise). The failure or
delay of a Party in exercising any rights granted to it hereunder shall not
constitute a waiver of any such right and that Party may exercise that right at
any time. Any single or partial exercise of any particular right by DuPont shall
not exhaust the same or constitute a waiver of any other right.

                  7.11  Force Majeure. Any failure or omission by a Party in the
performance of any obligation under this Agreement shall not be deemed a breach
of this Agreement or create any liability, if the same arises from any cause or
causes beyond the control of such Party, including, but not limited to, the
following, which, for purposes of this Agreement shall be regarded as beyond the
control of each of the Parties hereto: acts of God, fire, storm, flood,
earthquake, governmental regulation or direction, acts of the public enemy, a
Year 2000 failure of a supplier of such Party, war, rebellion, insurrection
riot, invasion, third party strike or lockout; provided, however, that such
Party shall resume the performance whenever such cause or causes are removed.
Notwithstanding the foregoing, if such Party cannot perform under this Agreement
for a period of 45 days due to such cause or causes, either Party may terminate
this Agreement by providing notice to the other Party.

                  7.12  Relationship of the Parties. It is expressly understood
and agreed that in rendering the Transitional Services hereunder, DuPont is
acting as an independent contractor and that this Agreement does not constitute
either Party as an employee, agent or other representative of the other Party
for any purpose whatsoever. Neither Party has the right or authority to enter
into any contract, warranty, guarantee or other undertaking in the name or for
the account of the other Party, or to assume or create any obligation or
liability of any kind, express or implied, on behalf of the other Party, or to
bind the other Party in any manner whatsoever, or to hold itself

                                       15

<PAGE>   16

out as having any right, power or authority to create any such obligation or
liability on behalf of the other or to bind the other Party in any manner
whatsoever (except as to any actions taken by either Party at the express
request and direction of the other Party).

                  7.13  Conflict. In case of conflict between the terms and
conditions of this Agreement and any Appendix, the terms and conditions of this
Agreement shall control and govern as it relates to the Transitional Service to
which those terms and conditions apply.

                  7.14  Entire Agreement. All understandings, representations,
warranties and agreements, if any, heretofore existing between the Parties
regarding the Transitional Services are merged into this Agreement, including
the Appendices attached hereto, which fully and completely express the agreement
of the Parties with respect to the subject matter hereof. The Parties have
entered into this Agreement after adequate investigation with neither Party
relying upon any statement or representation not contained in this Agreement or
Appendices attached hereto.

                  7.15  Language. This Agreement is executed in the English
language, and any interpretation or construction of this Agreement shall be
based solely on the English language official text.

                  7.16  WAIVER OF JURY TRIAL AND CONSENT TO JURISDICTION. EACH
PARTY HEREBY (a) WAIVES ANY AND ALL RIGHTS IT MAY HAVE TO A JURY TRIAL IN
CONNECTION WITH ANY MATTER OR RIGHT ARISING UNDER THIS AGREEMENT OR RELATING TO
THE TRANSITIONAL SERVICES, (b) CONSENTS TO THE EXCLUSIVE JURISDICTION OF ANY
STATE OR FEDERAL COURT WITHIN THE STATE OF DELAWARE AND IRREVOCABLY AGREES THAT
ALL ACTIONS OR PROCEEDINGS ARISING UNDER OR RELATING TO THIS AGREEMENT OR THE
TRANSITIONAL SERVICES SHALL BE LITIGATED IN ANY SUCH COURT, AND (c) WAIVES ANY
OBJECTION WHICH IT MAY HAVE BASED UPON IMPROPER VENUE OR FORUM NON CONVENIENS TO
THE CONDUCT OF ANY PROCEEDINGS IN ANY SUCH COURT.

                  7.17  Electronic Information Systems Security.

(a)      On the Effective Date, Conoco shall execute, deliver and abide by the
         Electronic Information Systems Security Agreement (ELIS 0004E) set
         forth in Appendix F. In addition, Conoco shall abide by any specific
         security policies or requirements of DuPont's affiliates, third party
         agents or contractors, such as CSC or Andersen. Any exceptions to this
         Section 7.17 must be agreed by the Parties.

(b)      No non-Conoco employee, performing work for Conoco, may access or use
         the Transitional Services without first signing a DuPont Electronic
         Information Security Agreement (ELIS Form 0004E). This shall include,
         but not be limited to, Conoco contractors, consultants or agents or
         employees of entities, directly or indirectly, having an ownership
         interest in Conoco.

                                       16

<PAGE>   17


(c)      DuPont, through its affiliates, third party agents or contractors, such
         as CSC or Andersen, shall administer all access control and other
         security measures to be applied to Conoco's computer applications users
         of the Transition Services. DuPont, through its affiliates, third party
         agents or contractors, such as CSC or Andersen, reserves the right to
         define Conoco's access level to DuPont's systems and applications.

                  7.18  Compliance with Laws. Conoco, in the use of DuPont's or
its affiliates, or third party's agent or contractors' systems, shall not
violate any Federal, state or other governmental or any other country's
statutes, laws, rules, regulations or ordinances, including, but not limited to,
the United States Copyright Act of 1976, as amended. Nor shall Conoco cause or
place any computer viruses, worms, Trojan horses, disabling code, time bombs or
other similar software programs or routines to be loaded onto or affect any of
DuPont's or its affiliates', third party agents' or contractors' software,
hardware, networking or data systems.

                  7.19  References. In this Agreement and the Appendices to this
Agreement: (a) the Appendices to this Agreement shall be incorporated into and
deemed part of this Agreement and all references to this Agreement shall include
the Appendices; (b) references to any law, legislative act, rule, or regulation
shall mean references to such law, legislative act, rule, or regulation in
changed or supplemented form or to a newly adopted law, legislative act, rule,
or regulation replacing the previous law, legislative act, rule, or regulation;
and (c) references to and mentions of the work "including" or the phrase "e.g."
shall mean "including, without limitation".

                  7.20  Consents, Approvals and Requests. Except as specifically
set forth in this Agreement, all consents and approvals to be given by either
Party under this Agreement shall not be unreasonably withheld or delayed and
each Party shall make only reasonable requests under this Agreement.

                  7.21  Remarketing. Conoco or its affiliates, subsidiaries or
divisions may not remarket all or any part of the Transitional Services, or make
all or any portion of the Transitional Services available to any third party,
without the prior consent of DuPont; provided, however, that Conoco or its
affiliates, subsidiaries or divisions may use (but not resell as a separate
product offering) the Transitional Services in providing services to third
parties in the ordinary course of Conoco's or its affiliates', subsidiaries' or
divisions' business.

                  7.22  DuPont hereby assigns and conveys to Conoco all of
DuPont's rights set forth in Section 32.01(4)(a)(i) of the MSA, to the fullest
extent that such rights may be assigned to Conoco by DuPont under the terms and
conditions of the MSA. DuPont shall incur no liability to Conoco or its
affiliates, subsidiaries or divisions in connection with the assignment of
Section 32.01(4)(a)(i) of the MSA to Conoco pursuant to this Section 7.22.




                                       17

<PAGE>   18

ARTICLE 8         MONITORING COMMITTEE.

                  8.01  Establishment. Both Service Coordinators of the Parties
shall constitute the Monitoring Committee. Upon the agreement of the Parties,
additional representatives may be appointed to serve on the Monitoring
Committee.

                  8.02  Purpose. The purpose of the Monitoring Committee is to
review the implementation of this Agreement and to use all reasonable efforts to
resolve issues in an effort to ensure the smooth and efficient operation of this
Agreement.

                  8.03  Frequency of Meetings. The Monitoring Committee shall
meet once a month throughout the duration of this Agreement (or less frequently
as agreed by the Parties) and as otherwise reasonably requested by either Party.

                  8.04  Meeting Procedure. The Monitoring Committee shall keep
minutes of its meetings.


ARTICLE 9         DISPUTE RESOLUTION.

(a)      The Parties understand and appreciate that long term mutual interests
         of the Parties will be best served by effecting a rapid and fair
         resolution of any claims or disputes that may arise under this
         Agreement or from any dispute concerning this Agreement's terms and
         conditions. Therefore, each Party agrees to use its best efforts to
         resolve all such claims or disputes as rapidly as possible on a fair
         and equitable basis.

(b)      If any dispute or claim arising under this Agreement cannot be readily
         resolved by the Parties, either Party may refer the matter to the
         Monitoring Committee which shall make a good faith effort to meet
         (including by telephone conference) and attempt to resolve the dispute
         within 15 days from the date on which the dispute was referred to it.

(c)      If any dispute or claim arising under this Agreement cannot be resolved
         by the Monitoring Committee in accordance with the time period set
         forth in Section 9.01(b), either Party may refer the matter to a panel
         consisting of one senior executive from each Party that has not been
         directly involved in the dispute or claim (the "Executive Panel"). Each
         Party shall appoint its representative to the Executive Panel within
         five days from the date the dispute or claim was referred to the
         Executive Panel. The Executive Panel shall meet (including by telephone
         conference) and attempt to resolve the dispute or claim within 30 days
         from the date on which the dispute or claim was referred to it. Unless
         the Executive Panel otherwise resolves such dispute in writing, either
         Party may pursue its rights and remedies under this Agreement after the
         end of such 30-day period.


ARTICLE 10        PARENT GUARANTEE.

                  Each Party hereby guarantees the performance of its
affiliates, subsidiaries and divisions under this Agreement and any applicable
services agreements for similar services in the countries set forth in Appendix
G.

                                       18

<PAGE>   19



ARTICLE 11       INFORMATION TECHNOLOGY SEPARATION COSTS

To effect the logical separation of Conoco and DuPont information technology:

(a)      DuPont, or its designee, and Conoco will obtain and DuPont, or its
         designee, be responsible for payment of (i) software consent or license
         fees required to transfer, assign, or replace on behalf of Conoco those
         shared operating systems software licenses, utility software licenses
         and applications software licenses, in each such case, on mainframe,
         midrange and distributed computers and telecommunications equipment
         that are shared by the Parties and in effect as of the Effective Date
         and any related external labor costs to effect such transfers,
         assignments or replacements and (ii) external labor costs to (x)
         identify software and hardware maintenance agreements shared by the
         Parties and in effect as of the Effective Date and (y) create separate
         "duplicate" agreements for each Party where required by such software
         or hardware agreements or as the Parties otherwise agree;

(b)      DuPont, or its designee, will be responsible for payment of actual
         external labor costs:

          (i)  incurred by the Parties necessary to plan, architect and effect
              the logical separation of the Parties' information technology
              computing and networking infrastructure in effect as of the
              Effective Date. Such logical separation requires (t) separating
              the mainframe environments, (u) network design and addressing for
              a logically separated environment, (v) relocating users from
              shared environments to stand-alone environments, (w) implementing
              sufficient security to effect logical separation of the networks,
              (x) setting-up and installing replacement hardware, (y) setting-up
              separate e-mail environments and (z) any such other separations as
              the Parties may agree;

          (ii)  incurred by the Parties necessary to plan, architect and effect
              any physical separation of the Parties' information technology
              networking infrastructure in effect as of the Effective Date to
              the extent such separation is required by regulatory requirements;
              and

          (iii)  incurred by the Parties, including payments in respect of any
              new external replacement contractors for internal staff, necessary
              to effect the planned separation of the Parties' applications
              systems; provided, however, that such payments shall not include
              any application development costs in respect of replacement
              applications or enhancements in functionality;

         provided, however, that in each such case, DuPont, or its designee,
         shall not be liable for any payments in respect of (i) through (iii),
         unless and until Conoco obtains DuPont's pre-approval of each
         applicable (x) statement of work and (y) technical design specification
         (e.g., including implementation and financial responsibilities of the
         Parties, any third parties' involvement and estimated costs) in respect
         of such payments. DuPont

                                       19

<PAGE>   20

         shall provide a response to Conoco with respect to a submission by
         Conoco for pre-approval of a completed statement of work and technical
         design specification in accordance with this paragraph no later than 20
         days after the date on which such completed materials are submitted to
         DuPont (such date being known as the "Response Date"). If Conoco fails
         to obtain DuPont's approval in accordance with the preceding sentence,
         the Parties shall expeditiously work in good faith with each other to
         resolve the basis for any such failure. Neither Party may submit any
         dispute in connection with the preceding sentence sooner than the date
         30 days after the Response Date. With respect to the aforementioned
         separation of Conoco and DuPont information technology, each party
         shall have the right to review and reject any technical design
         specification or other instruction submitted by the other party, or to
         a third party, if such specification or instruction materially
         adversely impacts such other party's electronic security, computer
         systems, networks, applications or the receipt of services from a third
         party.

(c)      In no event shall any amounts payable by DuPont, or its designee,
         pursuant to this Article 11 include any costs incurred by Conoco or its
         affiliates, subsidiaries or divisions in connection with its
         negotiation of any third party agreement that expires or otherwise
         terminates after the Effective Date.

(d)      Upon notice from DuPont, Conoco and its affiliates, subsidiaries and
         divisions shall provide DuPont, or its designee, with access to such
         financial records and supporting documentation as may be requested by
         DuPont, or its designee, for the purpose of performing an audit of the
         accuracy of the separation costs paid by DuPont, or its designee,
         pursuant to this Article 11. Any such audit shall be conducted at
         DuPont's expense. In the event that it is determined by an audit
         conducted pursuant to this paragraph that Conoco overcharged DuPont,
         Conoco shall pay to DuPont the amount of such overcharge.

                                       20

<PAGE>   21




         IN WITNESS WHEREOF, each of DuPont and Conoco has caused this Agreement
to be signed and delivered by its duly authorized representative.

                                    E. I. DU PONT DE NEMOURS AND COMPANY

                                    By:
                                       ---------------------------------------

                                    Title:
                                          ------------------------------------

                                    CONOCO INC.

                                    By:
                                       ---------------------------------------

                                    Title:
                                          ------------------------------------

                                       21
<PAGE>   22
                                      LEASE

                  1. PARTIES. THIS LEASE is made this ______day of
__________________, 1998 between CONOCO INC., a Delaware corporation, of 600
North Dairy Ashford, Houston, Texas, 77079 ("LANDLORD"), and E. I. DUPONT DE
NEMOURS AND COMPANY, a Delaware corporation, of 1007 Market Street, Wilmington,
Delaware 19898 ("TENANT").

                  2. PREMISES LEASED. LANDLORD hereby lets and leases unto
TENANT and TENANT hereby hires and takes from LANDLORD the following office and
data center space at LANDLORD'S Ponca City, Oklahoma Site, and as further
described on Exhibit "A", attached hereto and made a part hereof, including the
use of adjacent parking and common areas all as listed on Exhibit "B" attached
hereto and made a part hereof; All LEASED PREMISES shall be accepted by TENANT
in their current "AS IS" condition with no express or implied warranties, but
all office furniture shall remain the property of LANDLORD. Access to the LEASED
PREMISES shall be governed in accordance with the terms of this Lease.

                  3. APPURTENANT RIGHTS. TENANT shall have right to use the
following additional areas outside the LEASED PREMISES as described in Exhibit
"C", attached hereto and made a part hereof, for the sole and exclusive purposes
of delivery of information technology services, including without limitation
data center, telecommunications services and general office uses pertaining
thereto.


<PAGE>   23


                  The areas described in Exhibits A, B, and C are hereinafter
referred to as the "LEASED PREMISES"

                  4. SERVICES. LANDLORD shall supply to TENANT at the LEASED
PREMISES the following additional services as set forth on Exhibit "D" attached
hereto and made a part hereof. Any services not listed on Exhibit D requested by
TENANT must be approved in advance by LANDLORD.
                  
                  5. RELOCATION. Upon ninety (90) days prior written notice,
LANDLORD may re-locate all or part of TENANT'S office space but not the Computer
Data Center space at LANDLORD'S sole cost and expense to other alternate,
mutually agreed upon, similar office space which is equally accessible to the
Computer Data Center that is a portion of the LEASED PREMISES at LANDLORD'S
Ponca City, Oklahoma Site. All such re-locations shall be performed in a manner
that does not materially interfere with TENANT'S operations.

                  6. USE. TENANT or Computer Sciences Corporation, ("CSC"),
Andersen Consulting, L.L.P. ("Andersen") or other third parties providing
similar services, shall use and occupy the LEASED PREMISES solely and
exclusively for the delivery of information technology services, including,
without limitation, data center, telecommunication services, and general office
purposes pertaining thereto.

                  TENANT shall use the LEASED PREMISES in a reasonably efficient
manner. To the extent that TENANT operates the LEASED PREMISES in an inefficient
manner that materially increases the facilities costs incurred by

                                      -2-

<PAGE>   24


LANDLORD, LANDLORD shall promptly notify TENANT to take corrective action and
after notification, LANDLORD reserves the right to escalate the rent payable
hereunder, but only to the extent such excess facilities costs are attributable
to TENANT.

                  7. TERM. The term of this Lease shall be for a period
commencing with the date of this Lease and terminating at midnight on May 30,
2007.

                  8. RENT. TENANT'S rent shall be the annual sum of Seven
Hundred Fifty Thousand ($750,000.00) Dollars, payable in advance in equal
monthly installments of Sixty Two Thousand Five Hundred ($62,500.00) Dollars.
Said rental shall include the costs of all real estate taxes for the LEASED
PREMISES, all utilities used by TENANT at the LEASED PREMISES, and the cost of
services provided pursuant to Section 4 of this Lease. Notwithstanding the
foregoing, to the extent there is an increase of fifty percent (50%) or more to
the cost of electricity incurred by LANDLORD at the LEASED PREMISES as of the
date of this Lease, then LANDLORD reserves the right to increase the rent
payable hereunder to reflect any increase in such cost of electricity incurred
by LANDLORD and attributable to TENANT'S use of the LEASED PREMISES.

                  9. TERMINATION. TENANT may terminate this Lease at any time
during the term hereof by giving LANDLORD twelve (12) months prior written
notice. If TENANT does not give the required twelve (12) months prior written
notice then

                                      -3-

<PAGE>   25

TENANT may still terminate this Lease upon written notice but shall pay an
amount equal to the lesser of (i) the rent for twelve (12) months minus the
number of months after the notice of termination in which TENANT remains on the
LEASED PREMISES and pays rent, or (ii) the rent for the remainder of the term of
this Lease as liquidated damages. TENANT shall bear all costs incurred by it in
moving from the LEASED PREMISES upon termination.

                  LANDLORD may terminate this Lease at any time during the
period hereof by giving TENANT twelve (12) months written notice. If LANDLORD
terminates this Lease, any direct and actual documented relocation costs
(including Data Center and employee relocation costs) associated with moving
TENANT from the LEASED PREMISES shall be borne by LANDLORD.

                  10. LANDLORD'S AND TENANT'S COVENANTS. TENANT and LANDLORD
covenant and agree as follows:

                  (a) TENANT shall use and occupy the LEASED PREMISES in a
careful and proper manner; and shall not commit or permit waste or damage to the
LEASED PREMISES;

                  (b) TENANT shall comply with such lawful requirements of
Federal, State and local authorities as relate to its use and occupancy of the
LEASED PREMISES and shall not use such LEASED PREMISES for any unlawful purpose
or act;

                  (c) TENANT shall comply with all of LANDLORD'S standard
policies and procedures as in effect from time to

                                      -4-

<PAGE>   26

time with respect to the LEASED PREMISES, including but not limited to
procedures for the physical security of the LEASED PREMISES; provided, however,
LANDLORD shall provide notice to TENANT of such policies and procedures. To the
extent that any changes in LANDLORD'S standard policies and procedures may
affect the delivery of information, telecommunication, and technology services,
then such changes in the policies and procedures must be mutually agreed upon by
LANDLORD and TENANT.

                  (d) TENANT acknowledges and agrees that the LEASED PREMISES
let hereunder shall be jointly occupied by both LANDLORD and TENANT AND TENANT
shall permit LANDLORD and LANDLORD's contractors, employees, agents and
representatives to enter upon the LEASED PREMISES at any time for the purpose of
delivering information technology services and other ancilliary services or to
perform facilities-related services; provided, however, that LANDLORD shall not
unduly interfere with TENANT's operations.

                  (e) Unless otherwise prohibited by law, LANDLORD will provide
TENANT with twenty four (24) hours prior notice for the purpose of making
inspection and to determine that the LEASED PREMISES are in compliance with all
applicable Federal, State and local laws, rules and regulations, and for any
other purpose deemed necessary by LANDLORD.
   
                  (f) LANDLORD shall pay all taxes assessed against the LEASED
PREMISES.

                                      -5-

<PAGE>   27


                  (g) Except for damage to the LEASED PREMISES caused by TENANT,
LANDLORD shall be responsible for the costs of all maintenance and repairs of
the LEASED PREMISES and the building(s) of which the LEASED PREMISES is a part.

                  (h) TENANT shall make no alterations or improvements to the
LEASED PREMISES without the prior written consent of LANDLORD. Such consent
shall specify whether said modification or alteration must be removed at the end
of the term. Any alterations or modifications to the LEASED PREMISES will be
requested by TENANT in writing, and, if approved by LANDLORD, shall be paid by
LANDLORD, but only to the extent that such alterations or modifications are
necessary to continue to provide, improve, or enhance information technology
services to LANDLORD. All other alterations or modifications to the LEASED
PREMISES shall be paid by TENANT. No alterations and modifications to the LEASED
PREMISES which would or could adversely affect the marketability or market value
of the LEASED PREMISES shall be permitted without the prior written consent of
the LANDLORD. Consent shall not be unreasonably withheld to the extent that the
alterations and modifications to the LEASED PREMISES are necessary to continue
to operate and use the data center and enable the data center to adapt to
changing technology. To the extent LANDLORD requests the removal of any such
alterations and modifications, TENANT shall pay the removal costs of all
alterations and modifications paid for by TENANT, and shall restore such space
to the condition it

                                      -6-

<PAGE>   28

was in prior to the alterations and modifications. If LANDLORD elects to remove
or restore the alterations and modifications it paid for, LANDLORD shall do so
at its cost.

                  11.  HAZARDOUS MATERIALS

                  a. TENANT shall not cause or permit any Hazardous Material (as
defined in Subparagraph b. below) to be handled, stored or used in or about the
LEASED PREMISES by TENANT, its agents, employees, contractors or invitees, in
violation of any statute, law, rule or regulation of any governmental authority
having jurisdiction without the prior written consent of LANDLORD. TENANT hereby
indemnifies LANDLORD from and against any breach by TENANT of the obligations
stated in the preceding sentence, or from and against any losses (as hereinafter
defined) resulting from the use, disposal or release in violation of any law, of
Hazardous Materials handled, stored or used in or about the LEASED PREMISES by
TENANT, its agents, employees, contractors or invitees, and agrees to defend and
hold LANDLORD harmless from and against any and all loss, damage, cost and/or
expense (including, without limitation, diminution in value of the LEASED
PREMISES, damages for the loss or restriction on use of rentable or usable space
damages arising from any adverse impact on marketing of LEASED PREMISES and fees
collectively, "Losses") which arise during or after the term of this lease as a
result of such breach or from and against any losses (as hereinafter defined)
resulting from the use, storage, disposal or

                                      -7-

<PAGE>   29

release in violation of any Laws of Hazardous Materials brought, kept or used in
or about the LEASED PREMISES by TENANT, its agents, employees, contractors or
invitees. This indemnification of LANDLORD by TENANT includes, without
limitation, costs incurred in connection with any investigation of site
conditions or any cleanup, remedial, removal, or restoration work required by
any federal, state, or local governmental agency or political subdivision
because of Hazardous Material present in the soil or ground water on or under
the LEASED PREMISES which results from TENANT'S operations or from and against
any losses (as hereinafter defined) resulting from the use, disposal or release
in violation of any Laws as a result of Hazardous Materials handled, stored or
used in or about the LEASED PREMISES by TENANT, its agents, employees,
contractors or invitees. Without limiting the foregoing, if the presence of any
Hazardous Material on or about the LEASED PREMISES caused or permitted by TENANT
results in any contamination in or about the LEASED PREMISES TENANT shall
promptly take all actions at its sole expense as are necessary to return the
LEASED PREMISES to the condition existing prior to the introduction of such
Hazardous Material; provided that LANDLORD'S approval of such actions, and that
of the U.S. Environmental Protection Agency, if necessary, ("USEPA") of the
contractors to be used by TENANT in connection therewith, shall first be
obtained. 

                                      -8-

<PAGE>   30

                  b. As used herein, the term "Hazardous Material" means any
hazardous or toxic substance, material, or waste which is or becomes regulated
by any local governmental authority or the United States Government. The term
"Hazardous Material" includes, without limitation, any material or substance
which is (i) defined as a "hazardous waste or constituent, extremely hazardous
waste or "restricted hazardous waste" or similar term under the law of the
jurisdiction where the property is located or (ii) designated as a "hazardous
substance" pursuant to Section 311 of the Federal Water Pollution Control Act
(33 U.S.C. Section 1317), (iii) defined as a "hazardous waste" pursuant to
Section 1004 of the Federal Resource Conservation and Recovery Act, 42 U.S.C.
Section 6901, et seq. (42 U.S.C. Section 6903), or (iv) defined as a "hazardous
substance" pursuant to Section 101 of the Comprehensive Environmental Response,
Compensation and Liability Act, 42 U.S.C. Section 9601, et seq. (42 U.S.C.
Section 9601).

                  c. As used herein, the term "Laws" means any applicable
federal, state, or local laws, ordinances, or regulations relating to any
Hazardous Material affecting the LEASED PREMISES, including, without limitation,
the laws, ordinances, and regulations referred to in Subparagraph b above.

                  The indemnifications in this Paragraph 11 shall survive for a
period of one (1) year after the termination or earlier expiration of this
Lease.

                                      -9-

<PAGE>   31

                  12. QUIET AND PEACEABLE POSSESSION. If TENANT performs the
requirements hereof on its part to be performed, it shall have quiet and
peaceable possession and enjoyment of said LEASED PREMISES during the term
aforesaid.

                  13. INSURANCE. TENANT shall be responsible for acquiring and
maintaining Commercial General Liability (occurrence form including Contractual
Liability) in a combined single limit for Bodily Injury and Property Damage of
$1,000,000.00 per occurrence. The policy shall name LANDLORD as an additional
insured, naming itself and TENANT as insureds as their interest may appear.
TENANT shall also provide for the insurance of the contents of the LEASED
PREMISES. TENANT shall be permitted to provide such insurance through its
self-insurance program. LANDLORD shall provide Fire and Extended Coverage
insurance for the improvements to the LEASED PREMISES in their full insurable
value. All such policies shall include a waiver of subrogation against TENANT
and/or LANDLORD, their employees, agents and contractors. LANDLORD may provide
such insurance through its self insurance program.

                  14. LOCAL RULES. TENANT shall comply with all local LANDLORD
safety rules, procedures, and site policies including the use of dining rooms,
cafeterias, fitness facilities and other ancillary services, as from time to
time are in effect, and as further described in the Safety, Security and
Construction Procedures attached as Exhibit "E" attached hereto and made a part
hereof.

                                      -10-

<PAGE>   32

                  15. ASSIGNMENT AND SUBLETTING. TENANT may not assign this
Lease or sublet said LEASED PREMISES or any part thereof for any lawful business
without the prior written consent of LANDLORD, (which consent may not be
unreasonably withheld). If TENANT makes a written request to LANDLORD for
consent to assign or sublet, and if LANDLORD approves, TENANT shall remain
liable for the performance of its covenants hereunder. A change of service
provider shall not be deemed an assignment or sublease; provided, however, (i)
TENANT provides LANDLORD with ninety (90) days written notice prior to any such
change and, further provided; that (ii) LANDLORD reserves the right to prohibit
any change in service provider who, in LANDLORD'S judgment, is a competitor, or
is controlled in whole or in part by a competitor, of any of LANDLORD'S
businesses. Notwithstanding the foregoing, to the extent that LANDLORD enters
into the information technology business, LANDLORD cannot prohibit transfer to
another information technology service provider.

                  16. DEFAULT AND NOTICE. In the event either party hereto
materially defaults in carrying out any of such party's covenants and agreements
contained herein, and does not cure or is not diligently working to cure such
default for a period of ninety (90) days after written demand for compliance has
been made, such default shall, at the option of the party not in default,
terminate this Lease. If TENANT is in default and LANDLORD terminates this
Lease,

                                      -11-

<PAGE>   33

then TENANT shall have twelve (12) months to vacate the LEASED PREMISES;
provided however, TENANT's obligation to pay rent hereunder shall survive
termination of this Lease for the aforementioned period of up to twelve (12)
months during which time TENANT vacates the LEASED PREMISES. Notices pursuant to
this Lease shall be sent certified mail, return receipt requested, to TENANT at
1007 Market Street, Wilmington, Delaware 19898, Attention: Corporate Real
Estate; and to LANDLORD at 1000 S. Pine, Ponca City, Oklahoma, 74604, Attention:
Director Facility Management, or at such other place as LANDLORD and TENANT,
respectively, may in writing designate.

                  17. CASUALTY. To the extent that there is loss or other damage
to all or any portion of the LEASED PREMISES, LANDLORD shall at its expense
substitute additional space acceptable to TENANT so that TENANT can perform its
obligations under the MSA or similar agreements.

                  18. EMINENT DOMAIN. To the extent that all or any portion of
the LEASED PREMISES is taken by the exercise of eminent domain, LANDLORD shall
at its expense substitute additional space acceptable to TENANT in order that
TENANT shall be able to perform its obligations under the MSA or similar
agreements.

                  19. SUCCESSION. The covenants and conditions herein contained
shall inure to the benefit of and be binding upon the parties hereto, their
respective successors and assigns.

                                      -12-

<PAGE>   34


                  20. FORCE MAJEURE. Any failure or omission by LANDLORD or
TENANT in the performance of any obligation under this Lease shall not be deemed
a breach of this Lease or create any liability, if the same arises from any
cause or causes beyond the control of LANDLORD or TENANT, including but not
limited to the following, which, for purposes of this Lease shall be regarded as
beyond the control of each of the Parties hereto: acts of God, fire, storm,
flood, earthquake, hurricane, government direction or regulation, acts of the
public enemy, war, rebellion, insurrection, riot, invasion, third party strike
or lockout; provided, however, that LANDLORD and TENANT, as the case may be,
shall resume the performance whenever such cause or causes are removed.

                  21. ENTIRE AGREEMENT. All understanding, representations,
warranties and agreements, if any, heretofore existing between LANDLORD and
TENANT regarding this Lease and the LEASED PREMISES are merged into this Lease,
including the exhibits attached hereto, which fully and completely express the
agreement of LANDLORD and TENANT with respect to the subject matter hereof.
LANDLORD and TENANT have entered into this Lease after adequate investigation
with neither relying upon any statement or representation not contained in this
Lease agreement or the exhibits attached hereto.

                                      -13-

<PAGE>   35


                  22. DISPUTE RESOLUTION.

                  (a) The parties agree to make a diligent, good faith attempt
to resolve all disputes arising under this Lease. In the event this Lease
requires any dispute to be resolved by Dispute Resolution, the aggrieved party
shall promptly (or within the period of time required herein) notify the other
party to this Lease of the dispute. If the parties shall have failed to resolve
the dispute within ten days after delivery of such notice, either party may
submit the dispute to be settled by arbitration in the County of Kay, Oklahoma
in accordance with the provisions of this Paragraph 22 and the then existing
rules of the American Arbitration Association (or at any other place or under
any other form of arbitration mutually acceptable to the parties). The dispute
in question shall be settled by two independent arbitrators, one chosen by
TENANT and one by LANDLORD. TENANT or LANDLORD, as the case may be, shall
deliver a notice to the other appointing its arbitrator within 15 days after
receipt from the other of a notice appointing its arbitrator. If, within 30 days
after appointment of the two arbitrators, they are unable to agree upon the
determination in question, a third independent arbitrator shall be chosen within
ten days thereafter by mutual consent of the first two arbitrators or, if the
first two arbitrators fail to agree upon the appointment of a third arbitrator,
such appointment shall be made in

                                      -14-

<PAGE>   36

accordance with the rules of the American Arbitration Association, or any
organization successor thereto, from a panel of qualified arbitrators. The
decision of the arbitrators so appointed and chosen shall be given within 30
days after the selection of the third arbitrator. If three arbitrators shall be
appointed and the determination of one arbitrator is disparate from the middle
determination by more than twice the amount by which the other determination is
disparate from the middle determination, then the determination of such
arbitrator shall be excluded, the remaining two determinations shall be averaged
and such average shall be binding and conclusive on TENANT and LANDLORD;
otherwise the average of all three determinations shall be binding and
conclusive on TENANT and LANDLORD. Each party shall bear its own costs and
expenses of arbitration unless otherwise provided for herein or directed by the
arbitrator or arbitrators. The parties shall each abide by and perform any
resulting arbitration award. The arbitration award, when issued, shall be final
and shall be enforceable in any court of competent jurisdiction.

                  (b) While any dispute under this Lease is unresolved, the
parties shall continue to perform their obligations hereunder to the extent
possible notwithstanding such dispute.

                                      -15-

<PAGE>   37


                  23. GOVERNING LAW. This Lease shall be governed under the laws
of the State of Oklahoma without regard to conflict of law principals.

                  24. NO THIRD PARTY BENEFICIARY. Nothing expressed or implied
in this Lease is intended or shall be construed to confer upon or give any
person or entity, other than LANDLORD and TENANT, as the case may be, any rights
or remedies under or by reason of this Lease or any transaction contemplated
thereby.
                  25. NOTICE. All notices, consents, requests, approvals,
designations and other communications provided for or required herein must be in
writing and shall be deemed validly given, made or served (i) when delivered
personally or by facsimile transmission to the number indicated below (with
confirmation copy sent upon request of the receiver); (ii) by overnight mail;
(iii) or on the fifth day after deposited in any depository regularly maintained
by the United States Postal Service, postage pre-paid, certified or registered
mail, return receipt requested, addressed to the following or to such other
address as the party to be notified shall have specified to the other party in
accordance with this paragraph:

                  If to LANDLORD:
                  Conoco Inc.
                  1000 South Pine
                  Ponca City, Oklahoma
                  Attention:  Director Facility Management
                  Fax Number (580) 767-1077

                                      -16-

<PAGE>   38


                  If to TENANT:
                  E. I du Pont de Nemours and Company
                  1007 Market Street
                  Wilmington, Delaware 19898, USA
                  Attention: Corporate Real Estate
                  Fax Number: (302) 774-1077

                  26. MEMORANDUM OF LEASE. The parties will at any time, at the
request of either one, promptly execute duplicate originals of an instrument, in
recordable form, which will constitute a short form of Lease.

                  27. COUNTERPARTS. This Lease may be executed in two or more
counterparts each of which shall be deemed an original, and all of which shall
constitute one and the same instrument.

                                      -17-

<PAGE>   39




                  IN WITNESS WHEREOF, LANDLORD and TENANT have executed this
Lease the day and year first above written.

WITNESS:                               CONOCO INC.

                                       By:
- ---------------------------               ---------------------------------
                                       Title:
                                             ------------------------------


WITNESS:                               E. I. DUPONT DE NEMOURS AND COMPANY

                                       By:
- ---------------------------               ---------------------------------
                                       Title:
                                             ------------------------------


Ponca City Data Center Lease-4


                                      -18-

<PAGE>   1
                                                                  EXHIBIT 10.11

                              DME TOLLING AGREEMENT

THIS AGREEMENT, made and entered into as of this 1st day of October 1998 by and
between DUPONT (U.K.) LIMITED, whose registered office is at Wedgwood Way,
Stevenage, Hertfordshire, SG2 4QN, England (hereinafter referred to as DUPONT)
and CONOCO LIMITED whose registered office is at Park House, 116 Park Street,
London W1Y 4NN, England (hereinafter referred to as CONTRACTOR).

WHEREAS DUPONT owns certain facilities for the production of DME currently
located at CONTRACTOR's Humber Refinery;

WHEREAS CONTRACTOR is willing to operate such facilities on behalf of DUPONT;
and

WHEREAS, DUPONT desires to avail itself of the services of CONTRACTOR for the
time, in the manner, and upon the terms and conditions hereinafter set forth;

NOW, THEREFORE, in consideration of the premises and of the mutual undertakings
hereunder, the Parties agree as follows:

1.       REPLACEMENT OF PRIOR AGREEMENTS

         This agreement shall take the place of and entirely supersede any oral
         or written contracts, agreements or arrangements that deal with the
         same subject matter as referenced herein except for any rights,
         obligations and liabilities which by the terms of that agreement or the
         law survive its expiration, termination or cancellation.

2.       DEFINITIONS

         When used in the Agreement:
<PAGE>   2


         DUPONT EQUIPMENT means the equipment listed in Schedule 1 owned by
         DUPONT and to be used in the manufacture of the PRODUCT.

         MATERIAL means any matter furnished by or on behalf of and at the
         expense of DUPONT to CONTRACTOR for processing, handling or for use in
         the production of PRODUCT.

         PRODUCT means finished DME meeting SPECIFICATIONS that has been
         produced by CONTRACTOR from MATERIAL.

         REFINERY means the Humber Refinery owned by CONTRACTOR at which the
         DUPONT EQUIPMENT is currently located.

         REPLACEMENT COST means the price of MATERIAL plus any costs or fees
         paid by DUPONT pursuant to this Agreement for services by CONTRACTOR
         for any processing of MATERIAL or PRODUCT. The "price" as used in this
         definition of REPLACEMENT COST will be the price of the MATERIAL in
         effect at the time the PRODUCT was manufactured.

         SERVICES has the meaning ascribed in Section 3.01.

         SPECIFICATIONS has the meaning ascribed in Section 3.01.

3.       SCOPE OF WORK

3.01     CONTRACTOR shall, except to the extent otherwise expressly stated
         herein, furnish all labour, supervision, materials, tools, equipment,
         facilities and services to properly and efficiently do all things
         necessary to convert MATERIAL to finished PRODUCT in accordance with
         Schedule 2 (SPECIFICATIONS), attached hereto and hereinafter referred
         to as SPECIFICATIONS. Such SPECIFICATIONS may be 

<PAGE>   3



         modified from time to time by mutual written agreement. The services
         herein described are hereinafter referred to as SERVICES.

3.02     Provided the MATERIAL complies with the SPECIFICATIONS set out in
         Schedule 2 CONTRACTOR will use reasonable endeavours to ensure that the
         PRODUCT produced by the DUPONT EQUIPMENT complies with the
         SPECIFICATIONS.

4.       TITLE

         Unless otherwise specified in this Agreement, title to MATERIAL and
         PRODUCT shall remain with DUPONT.

5.       PERIOD OF AGREEMENT

5.01     This Agreement will become effective as of 1 October 1998 and shall
         continue in full force and effect for a period of four (4) years and
         shall thereafter continue on a year-to-year basis unless and until
         terminated by either party giving two (2) years prior written notice of
         termination. For the avoidance of doubt, the earliest date upon which
         such termination notice can be effective is 30 September 2002.

5.02     If either Party wishes to terminate this Agreement earlier than as
         provided in Section 5.01, it may give notice to the other Party and the
         Parties will meet and use reasonable endeavours to agree on mutually
         satisfactory arrangements for such early termination.

5.03     Upon the termination or expiration of this Agreement, or any extension
         hereof CONTRACTOR shall promptly tender to DUPONT all MATERIAL and
         PRODUCT. DUPONT shall have ninety (90) days from the termination or
         expiration of this Agreement to physically remove the DUPONT EQUIPMENT
         from the REFINERY and at DUPONT's expense restore the site where the
         DUPONT EQUIPMENT

<PAGE>   4



         was located to the condition such site was in before the DUPONT
         EQUIPMENT was located there.

6.       COMPENSATION

6.01     Consideration

         As consideration for the SERVICES, DUPONT shall pay to CONTRACTOR the
         amounts specified in Schedule 3. If the amount to be paid for any
         SERVICES is described in Schedule 3 as "cost", the use of the term
         "cost" does not mean CONTRACTOR's cost to provide that Service, but the
         cost to DUPONT to receive such Service from CONTRACTOR.

6.02     Taxes

         (a)      Income, Profits, and Capital Gains Taxes

                  CONTRACTOR shall pay all income and profits taxes and taxes on
                  capital gains, and related fines, penalties and interest
                  thereon assessed or levied against CONTRACTOR by any
                  government authority or any political subdivision thereof or
                  by the government of any other country against CONTRACTOR or
                  CONTRACTOR's subcontractors in respect of the SERVICES.

         (b)      Other Taxes

                  All other taxes (other than those specified in Section 6.02
                  above), assessed on the provision of SERVICES shall be paid by
                  DUPONT.


<PAGE>   5



6.03     Invoicing and Payment

         (a)      DUPONT shall initiate payment of all undisputed amounts
                  contained in CONTRACTOR's monthly invoices within 30 days
                  after receipt thereof less any amount DUPONT is required by
                  law to withhold or deduct. Such payment shall not prejudice
                  DUPONT's right to subsequently dispute any part of an invoice.
                  In the event DUPONT disputes an item billed, DUPONT shall,
                  within 60 days of receipt of CONTRACTOR's invoice, notify
                  CONTRACTOR of the item in dispute, specifying DUPONT's
                  complaint. DUPONT may withhold payment of items in dispute
                  without interest until the dispute is resolved. The undisputed
                  amount, however, shall be paid without delay.

                  Where applicable, DUPONT and CONTRACTOR shall agree in advance
                  the gross lump sum amount to be charged or the "cost" for the
                  SERVICES to be provided, as specified in Schedule 3, inclusive
                  of charges, overheads, handling fees and mark ups. These sums
                  will then be calculated and proportioned on a monthly basis
                  and submitted by CONTRACTOR to DUPONT as described above. In
                  those areas where work cannot be agreed on a lump sum basis,
                  the variable basis (described in terms of readily identifiable
                  metrics) of billing and the required supporting documentation
                  shall be agreed as part of the service description. Such
                  documentation will be retained by CONTRACTOR for a reasonable
                  period subject to verification by DUPONT upon audit.

         (b)      If any payment is not paid when due, CONTRACTOR shall have the
                  right, without any liability to DUPONT, or anyone claiming by
                  or through DUPONT, to immediately cease providing the SERVICES
                  until the payment in full of all such payments, which right
                  may be exercised by CONTRACTOR in its sole and 


<PAGE>   6


                  absolute discretion and shall not affect CONTRACTOR's right or
                  ability to terminate this Agreement as set forth in Article
                  18.

6.04     Audits - Third Party Audit

         From time to time as agreed by the Parties, each Party shall have the
         right to have an independent certified public accounting firm ("CPA
         firm"), mutually acceptable to the Parties, audit the other party's
         books of accounts and other records pertaining to a dispute arising
         from the cost of SERVICES (including invoiced and reimbursed costs)
         provided pursuant to this Agreement for a period of twenty-four (24)
         months following the end of the calendar year in which such disputed
         SERVICES were rendered. Prior to commencing its audit, the CPA firm
         shall execute a confidentiality agreement reasonably acceptable to the
         audited Party. Upon completing its audit, the CPA firm shall report
         only whether or not the charges from the CONTRACTOR to DUPONT hereunder
         were correct or, if not, the amount of any overcharge or undercharge.
         The Parties agree to accept the determination of the CPA firm as
         binding and final, and if the audit determines that either Party owes
         money to the other party, the owing Party shall promptly pay such sum
         to the other party. The cost of such audit shall be borne by the
         requesting party and shall be limited to a duration not to exceed two
         (2) months.

7.       SHIPMENTS, PLANNING - COMMUNICATION

7.01     Freight charges for all MATERIAL or other items supplied directly by
         DUPONT under this Agreement to the REFINERY storage tank and for all
         PRODUCT produced hereunder by CONTRACTOR and shipped per DUPONT's
         instructions, shall be for DUPONT's account.

7.02     All planning, communication and administrative requirements between the
         Parties shall be subject to the terms of the DME Handling and


<PAGE>   7


         Distribution Manual dated January 1995 or as updated by agreement
         between the Parties.

8.       SAFETY

8.01     If in CONTRACTOR's opinion the safety of any persons or any property is
         or would be compromised by the operation of the DUPONT EQUIPMENT then
         CONTRACTOR may at any time and from time to time shut down the DUPONT
         EQUIPMENT. Except in emergency cases CONTRACTOR shall use reasonable
         endeavours to give DUPONT prior notice of any such shut down.

8.02     All personnel, vehicles, trailers and equipment of DUPONT or any of its
         agents or contractors must comply with all applicable safety rules and
         regulations at all times.

9.       ENVIRONMENT

9.01     CONTRACTOR will use reasonable endeavours in the operation of the
         DUPONT EQUIPMENT to comply with the Petrochemical Process Authorisation
         granted by the Environmental Agency.

9.02     CONTRACTOR will be entitled to take all steps it deems necessary to
         prevent environmental harm or as required by any regulatory agencies.

9.03     CONTRACTOR will on behalf of DUPONT consult with and agree conditions
         as appropriate with any relevant regulatory agencies. CONTRACTOR will
         advise DUPONT of any agreement that has a significant operational
         impact. DUPONT will inform CONTRACTOR of any changes to environmental
         requirements relevant to operation of the DUPONT EQUIPMENT.

<PAGE>   8


10.      RECORDS AND INSPECTION

         CONTRACTOR agrees to maintain, in accordance with "Generally Accepted
         Accounting Principals and Practices", such records as may be necessary
         to adequately reflect the accuracy of CONTRACTOR's charges and invoices
         for reimbursement under this Agreement and maintain such other
         additional records as DUPONT may from time to time reasonably require
         in connection with this Agreement. DUPONT shall have the right from
         time to time to inspect and verify the records kept by CONTRACTOR in
         connection with this Agreement.

         DUPONT's duly authorised representatives shall have the right to visit,
         observe and inspect CONTRACTOR's production and related facilities
         utilised to accomplish the objectives of this Agreement at any time
         during CONTRACTOR's normal business hours on reasonable notice to
         CONTRACTOR. DUPONT's duly authorised representatives shall also have
         the right to select and inspect samples of MATERIAL, MATERIALS which
         are in the manufacturing process and PRODUCT in CONTRACTOR's facility
         received, obtained or produced under this Agreement.

11.      NONDISCLOSURE

         CONTRACTOR agrees not to disclose to others without the prior written
         consent of DUPONT:

         (a)      the terms and conditions under which DUPONT has purchased or
                  plans to purchase SERVICES or

         (b)      the structure or composition of PRODUCT, information or
                  methods which are provided by DUPONT, including without
                  limitation, information about DUPONT's proprietary process for
                  producing PRODUCT, except when such disclosure is necessary to
                  provide SERVICES required under this Agreement

<PAGE>   9


                  or as required by law. The obligations of non-disclosure in
                  Clause 11(b) shall be in effect during the term of this
                  Agreement and any extensions thereof and for ten (10) years
                  after the termination or expiry of this Agreement.

12.      HAZARDS

         CONTRACTOR acknowledges that hazards may be involved in providing the
         SERVICES. Accordingly, CONTRACTOR agrees to provide its SERVICES in a
         careful and workmanlike manner and to take all necessary precautions in
         the processing, handling, transportation and disposal of MATERIAL and
         PRODUCT involved in this Agreement, to avoid an unhealthy or unsafe
         work environment, injuries to persons, damage to property or pollution.
         DUPONT may provide CONTRACTOR with certain information regarding the
         MATERIAL, including procedures for processing, handling, transporting
         and disposal, as well as toxicological data. Any information supplied
         by DUPONT shall be the latest information known to DUPONT and relevant
         to the work to be provided hereunder. Such information is provided
         without warranty or representation as to its completeness or
         suitability in providing the SERVICES. The methods employed and the
         precautions taken to handle DUPONT EQUIPMENT, MATERIAL and PRODUCT
         shall be determined by and rest solely with CONTRACTOR. CONTRACTOR
         agrees to provide its employees with a safe and healthy workplace
         using, but not limited to, such information as is or may be provided by
         DUPONT.

13.      REPRESENTATIVES

         DUPONT and CONTRACTOR shall each nominate a representative to act as
         the primary contact person for the provision of the SERVICES
         (collectively, the "Primary Co-ordinators"). The initial Primary
         Co-ordinators shall be Peter F. Bloomfield for CONTRACTOR and Jan
         Schnebelie for DUPONT.

<PAGE>   10


14.      MONITORING COMMITTEE

14.01    Establishment

         Both Primary Co-ordinators of the Parties shall constitute the
         Monitoring Committee.

14.02    Purpose

         The purpose of the Monitoring Committee is to review the implementation
         of this Agreement and to use all reasonable efforts to resolve issues
         in an effort to ensure the smooth and efficient operation of this
         Agreement.

14.03    Frequency of Meetings

         The Monitoring Committee shall meet quarterly or as necessary
         throughout the duration of this Agreement (other than where the Parties
         agree that such a periodic meeting is not necessary) and as otherwise
         reasonably requested by either Party.

14.04    Meeting Procedure

         The Monitoring Committee shall keep minutes of its meetings and develop
         a reasonable procedure if needed.

15.      DISPUTE RESOLUTION

15.01    The Parties understand and appreciate that their long term mutual
         interests will be best served by effecting a rapid and fair resolution
         of any claims or disputes which may arise out of this Agreement or from
         any dispute concerning this Agreement's terms. Therefore, each Party
         agrees to use its best efforts to resolve all such dispute as rapidly
         as

<PAGE>   11


         possible on a fair and equitable basis. Toward this end each Party
         agrees to develop and follow a process for presenting, rapidly
         assessing, and settling claims and other disputes on a fair and
         equitable basis.

15.02    If any dispute or claim arising under this Agreement cannot be readily
         resolved by the Parties pursuant to Section 15.01, the parties agree to
         refer the matter to the Monitoring Committee which shall meet and
         attempt to resolve the dispute within fifteen (15) days from the day
         the dispute was brought before its attention.

15.03    If any dispute or claim arising under the Agreement cannot be resolved
         by the Monitoring committee pursuant to Section 15.02, the Parties
         agree to refer the matter to a panel consisting of one (1) senior
         executive from each Party for review and resolution. The senior
         executive shall not have been directly or indirectly involved in the
         claim or dispute. A copy of the Agreement terms, relevant facts, areas
         of disagreement and a concise summary of basis of each side's
         contention will be provided to both executives who shall review the
         same, and attempt to teach a mutual resolution of the issue. The senior
         executives shall meet and resolve the dispute within thirty (30) days
         of their appointment.

16.      LIMITATION OF LIABILITY, WARRANTY AND INDEMNITY

16.01    Unless CONTRACTOR is negligent in the provision of the SERVICES,
         CONTRACTOR shall have no liability whatsoever, whether in contract or
         in tort, to DUPONT for failure of the PRODUCT to meet the SPECIFICATION
         and if CONTRACTOR is so negligent then CONTRACTOR's liability shall be
         limited to the REPLACEMENT COST of the PRODUCT which does not meet the
         specification. CONTRACTOR shall in no circumstances be negligent for
         the purposes of this Clause if; (i) MATERIAL does not meet
         specifications;

<PAGE>   12



         or (ii) unless CONTRACTOR has not complied with DUPONT's instructions
         for the manufacture of the PRODUCT.

16.02    Notwithstanding anything to the contrary contained herein or at law or
         in equity, neither Party shall be liable to the other for punitive,
         special, indirect, incidental or consequential damages (including,
         without limitation, damages for loss of business profits, business
         interruption or any other loss) arising from or relating to any claim
         made under this Agreement or regarding the provision of or the failure
         to provide the SERVICES.

16.03    Each Party will indemnify and hold each other harmless from all claims,
         liabilities, damages, losses, costs, expenses (including, but not
         limited to, settlements, judgements, court costs and reasonable legal
         fees), arising out of any actual or alleged injury, loss or damage of
         any nature whatsoever to that Party's own employees or property
         (including, without limitation in the case of DUPONT, the DUPONT
         EQUIPMENT and in the case of CONTRACTOR the REFINERY).

16.04    Subject to the limitations set forth in the foregoing provisions of
         this Article 16, DUPONT shall indemnify, defend and hold CONTRACTOR
         harmless against any and all claims, liabilities, damages, losses,
         costs, expenses (including, but not limited to, settlements,
         judgements, court costs and reasonable legal fees), fines and penalties
         arising out of any injury or death, and any loss or damage of any
         nature whatsoever (including, without limitation, loss of or damage to
         property, or damage to the environment) due or relating to provision of
         the SERVICES except for losses, liabilities, obligations, costs,
         expense or damages which are the direct and sole result of the gross
         negligence or wilful misconduct of the personnel of CONTRACTOR and/or
         any contract personnel who are managed and directed by CONTRACTOR.

16.05    The indemnities contained in this Article 16 shall survive for a period
         of three (3) years after the termination of this Agreement for any
         reason,

<PAGE>   13


         and any claim or indemnity under this Article must be made by written
         notice to the indemnifying Party within one (1) year after the
         discovery thereof.

17.      DEFAULT

17.01    In the event that either Party hereto shall default in the performance
         of any obligation specified herein, the nondefaulting party shall
         notify the other Party hereof in writing and, if such default is not
         remedied within fourteen (14) days from date of such notice, or if the
         other Party is diligently attempting to cure such default but is unable
         to cure such default within thirty (30) days from the date of such
         notice, then the nondefaulting Party shall have the right to terminate
         this Agreement immediately. If, in the nondefaulting Party's sole
         opinion, such default may result in substantial property damage,
         injury, accident or death, that Party may, at any time, immediately
         suspend this Agreement without penalty or damages. Termination under
         this article or under any other article of the Agreement shall not
         relive or release either party hereto from any rights, liabilities or
         obligations which it has accrued prior to the date of such termination.

17.02    If either Party should be adjudged bankrupt or make a general
         assignment for the benefit of its creditors, or if a receiver should be
         appointed on account of its insolvency, the other Party may, on seven
         (7) days written notice terminate this Agreement. Termination under
         this article, or any articles hereof, shall not relieve or release the
         parties from any rights, liabilities, or obligations which may have
         arisen prior to the date of such termination.

18.      FORCE MAJEURE

18.01    No liability shall result to either Party from delay in performance or
         from non performance caused by circumstances beyond the control of the
         Party who has delayed performance or not performed. The 


<PAGE>   14


         nonperforming Party shall be diligent in attempting to remove any such
         cause and shall promptly notify the other Party of its extent and
         probably duration.

18.02    If the nonperforming Party who has delayed performance or not performed
         on account of circumstances beyond its control is unable to remove the
         causes within seven (7) days, the other Party shall have the right to
         terminate, without penalty, this entire Agreement or any portion of it.

19.      INDEPENDENT CONTRACTOR

         It is understood that employees, methods, facilities and equipment of
         CONTRACTOR shall at all times be under its exclusive direction and
         control. CONTRACTOR's relationship to DUPONT shall be that of an
         independent contractor. Nothing in the Agreement shall be construed to
         constitute CONTRACTOR, or any of its employees, as an agent, associate,
         joint venturer or partner of DUPONT.

20.      COMPLIANCE WITH LAWS

         CONTRACTOR agrees that in the performance of the SERVICES provided
         hereunder, including but not limited to, the disposal of any waste
         MATERIAL or PRODUCT, it will comply with all applicable laws, rules and
         regulations of governmental authorities in connection therewith.

21.      NOTICES

         CONTRACTOR correspondence, information, documents, notices or invoices
         to DUPONT shall be sent personally or by first-class mail or fax to:

<PAGE>   15



         Attention:        Marc Arter
                           c/o DuPont de Nemours International S.A.
                           2, chemin du Pavillon
                           P.O. Box 50, Le Grand-Saconnex
                           Geneva - Switzerland

         Fax:              +41-22-717 61 69

         DUPONT correspondence, information, documents, notices or payments to
         CONTRACTOR shall be sent personally or by first class mail or fax to:

         Attention:        Peter F. Bloomfield
                           South Killingholme
                           Grimsby, Lincolnshire, U.K.
                           DN40 3DW

         Fax:              +44-1469-555 455

         Either Party may change its address for notice hereunder upon no less
         than thirty (30) days prior written notice thereof to the other Party.

22.      AUTHORITY

         The Parties hereby represent that they have full power and authority to
         enter into and perform this Agreement and the Parties do not know of
         any contract, agreements, provisos or undertakings which would prevent
         the full execution and performance of this Agreement.

23.      ASSIGNMENT

         Neither Party shall, without the prior written consent of the other
         Party, assign or transfer this Agreement, in whole or in part.


<PAGE>   16


24.      RESERVATION OF RIGHTS

         Either Party's waiver of any of its remedies afforded hereunder or by
         law is without prejudice and shall not operate to waive any other
         remedies which such Party shall have available to it, nor shall such
         waiver operate to waive such Party's rights to any remedies due to a
         future breach, whether of a like or different character.

25.      HEADINGS

         All headings of the Articles of this Agreement are inserted for
         convenience only and shall not affect any construction or
         interpretations of this Agreement.

26.      APPLICABLE LAW

         This Agreement will be governed by and construed in accordance with the
         laws of England and the courts within England will be the only courts
         of competent jurisdiction. This Agreement will not be governed by the
         U.N. Convention on Contracts for the International Sale of Goods.

27.      SEVERABILITY

         In the event that any Article of this Agreement shall be found to be
         void or unenforceable, such findings shall not be construed to render
         any other Article of this Agreement either void or unenforceable, and
         all other Articles shall remain in full force and effect unless the
         Article(s) which is/are invalid or unenforceable shall substantially
         affect the rights or obligations granted to or undertaken by either
         Party.

<PAGE>   17


28.      ENTIRETY

         This Agreement, together with the Schedules specifically referenced and
         attached hereto, embodies the entire understanding between DUPONT and
         CONTRACTOR and, except as otherwise specifically stated herein, there
         are no contracts, understandings, conditions, or representations, oral
         or written, with reference to the subject matter hereof which are not
         merged herein. Except as otherwise specifically stated, no modification
         hereto shall be of any force or effect unless (1) reduced to writing
         and signed by both parties hereto, and (2) expressly referred to as
         being modifications of this agreement.

30.      FIXED COST AND YIELD IMPROVEMENTS

         CONTRACTOR will maintain a continuous improvement management system.
         Any fixed cost or yield improvements over 1.43Kg methanol/Kg DME due to
         CONTRACTOR's efforts will be shared equally between the Parties. Any
         yield improvements due to technology change will be for the benefit of
         DUPONT.

         IN WITNESS WHEREOF, the parties have caused this Agreement to be
         executed by their duly authorised representatives.

         CONOCO LIMITED                     DUPONT (U.K.) LIMITED

         BY:                                BY:
            ----------------------             --------------------
         TITLE:                             TITLE:
               -------------------                -----------------



<PAGE>   1
                                                                   EXHIBIT 10.15

                                   CONOCO INC.

                   SALARY DEFERRAL & SAVINGS RESTORATION PLAN


I.       PURPOSE

         The purpose of the Salary Deferral & Savings Restoration Plan (Plan) is
         to provide an eligible employee with the opportunity to defer, until
         termination of employment, receipt of salary that, because of
         compensation limits imposed by law, is ineligible to be considered in
         calculating benefits within the Company's tax-qualified defined
         contribution plans and thereby recover benefits lost because of that
         restriction.

II.      ADMINISTRATION

         The administration of this Plan is vested in the Employee Benefit Plans
         Board (EBPB). The EBPB may adopt such rules as it may deem necessary
         for the proper administration of the Plan, and may appoint such persons
         or groups as may be judged necessary to assist in the administration of
         the Plan. The EBPB's decision in all matters involving the
         interpretation and application of this Plan shall be final. The EBPB
         shall have the discretionary right to determine eligibility for
         benefits hereunder and to construe the terms and conditions of this
         Plan.

III.     ELIGIBILITY

         An employee of the Company who is participating in the Company's
         tax-qualified defined contribution plans and whose annual base
         compensation exceeds the amount prescribed in Internal Revenue Code
         Section 401(a)(17) shall be eligible to participate in this Plan
         (hereinafter "Participant").

         For purposes of this Plan, the term "Company" means Conoco Inc., any
         wholly-owned subsidiary or part thereof and any joint venture or
         partnership in which Conoco Inc. has an ownership interest, provided
         that such entity (1) adopts this Plan with the approval of Conoco Inc.
         and (2) agrees to make the necessary financial commitment in respect of
         any of its employees who become Participants in this Plan.

         Participation in this Plan is entirely voluntary.

IV.      PARTICIPANT ACCOUNTS

         A.       PARTICIPANT CONTRIBUTIONS

                  A Participant may elect to defer receipt of a percentage of
                  annual base compensation in excess of the amount prescribed in
                  Internal Revenue Code Section 401(a)(17), and have the dollar
                  equivalent of the deferral percentage credited to a
                  Participant Account under this Plan. The deferral percentage
                  elected under this Plan shall not exceed that allowed in the
                  tax-qualified defined contribution plans of the Company in
                  which (s)he participates. Except as
<PAGE>   2


                  provided below, such deferral election will be made prior to
                  the beginning of each calendar year and will be irrevocable
                  for that calendar year.

                  For purposes of a Participant's first year of participation in
                  this Plan, the compensation deferral election must be made no
                  later than 30 days prior to the first day of the month for
                  which compensation is deferred and will be irrevocable for the
                  remainder of that calendar year.

         B.       COMPANY CONTRIBUTIONS

                  To the extent that a Participant makes a deferral election
                  under the terms of subparagraph (A) above, the Company will
                  credit to that Participant's Account in this Plan an amount
                  equivalent to the Company matching contribution that would be
                  provided to that Participant under the terms of the Company's
                  tax-qualified defined contribution plans in which (s)he is
                  participating.

         C.       EARNINGS EQUIVALENTS

                  Credits for Participant Contributions and Company
                  Contributions shall be treated as having been invested in one
                  or more of the investment options available in the Company's
                  tax-qualified defined contribution plans in which (s)he is
                  participating. Additional credit (or debit) amounts will be
                  posted to the Participant's Account in this Plan based on the
                  performance of those investment options.

                  The Participant shall have the right to:

                  1.       Designate which investment options are to be used in
                           valuing his/her Account under this Plan, subject to
                           the rules governing investment direction in the
                           Company's tax-qualified defined contribution plan in
                           which (s)he is participating; and/or

                  2.       Change the designated investment options used in
                           valuing his/her Account under this Plan, subject to
                           the rules governing investment direction and/or
                           transfers among funds in the Company's tax-qualified
                           defined contribution plans in which (s)he is
                           participating.

         D.       CREDITS TO ACCOUNTS

                  1.       Participant Contributions, Company Contributions and
                           Earnings Equivalents shall be credited (or debited)
                           to the Participant's Account under this Plan as
                           unfunded book entries stated as cash balances, and
                           will not be payable to Participants until such time
                           as employment with the Company terminates. The cash
                           balances in Participant Accounts shall be unfunded
                           general obligations of the Company, and no
                           Participant shall have any claim to or security
                           interest in any asset of the Company on account
                           thereof.
<PAGE>   3


                  2.       For each employee of Conoco Inc. who was
                           participating in the DuPont Salary Deferral & Savings
                           Restoration Plan (DuPont Plan) immediately prior to
                           January 1, 1999, an amount equivalent to Participant
                           Contributions, Company Contributions and Earnings
                           Equivalents under the DuPont Plan credited (or
                           debited) to the Participant's Account under the
                           DuPont Plan shall be credited to the Participant's
                           Account under this Plan as unfunded book entries
                           stated as cash balances, and will not be payable to
                           Participants until such time as employment with the
                           Company terminates. The cash balances in Participant
                           Accounts shall be unfunded general obligations of the
                           Company and no Participant shall have any claim to or
                           security interest in any asset of the Company on
                           account thereof.

V.       VESTING

         Participant Contributions and Company Contributions and Earnings
         Equivalents shall be vested at the time such amounts are credited to
         the Participant's Account.

VI.      PAYMENT OF BENEFITS

         Amounts payable under this Plan shall be delivered in a cash lump sum
         as soon as practicable after termination of employment unless the
         Participant irrevocably elects under rules prescribed by the EBPB to
         receive payments in a series of annual installments. All payments under
         this Plan shall be made by, and all expenses of administering this Plan
         shall be borne by, the Company.

VII.     RIGHT TO MODIFY

         The Company reserves the right to change or discontinue this Plan in
         its discretion by action of the Board of Directors or its delegee.


<PAGE>   1
                                                                EXHIBIT 10.18


                EMERGENCY CALL TRANSPORTATION SERVICES AGREEMENT


         This Emergency Call Transportation Services Agreement ("Agreement") is
effective as of 7:00 a.m. Mont Belvieu, Texas local time on the Effective Date
by and between Conoco Inc., a Delaware corporation with its principal place of
business at 600 North Dairy Ashford Road, Houston, Texas 77079 ("Conoco") and E.
I. du Pont de Nemours and Company, a Delaware corporation, with its principal
place of business at 1007 Market Street, Wilmington, Delaware 19898 ("DuPont").
(Conoco and DuPont are at times referred to herein individually as a "Party" and
collectively as "Parties").
                                   WITNESSETH

         WHEREAS, prior to the initial public offering of Conoco (as defined in
the Restructuring, Transfer and Separation Agreement), Conoco has heretofore
operated the Backup Pipeline so as to provide backup service to the DuPont
Ethane Pipeline for delivering ethane to DuPont's Sabine River Works Facility;
and

         WHEREAS, DuPont desires to continue to have an emergency call on the
Backup Pipeline and Conoco will provide such emergency backup service for the
DuPont Ethane Pipeline pursuant to this Agreement; and

         WHEREAS, Conoco and DuPont do now desire to enter into this Agreement
which will, effective as of the Effective Date, provide for emergency backup
transportation services for DuPont on the Backup Pipeline; and

         NOW, THEREFORE, subject to and in consideration of the terms,
conditions and covenants contained in this Agreement, Conoco and DuPont agree as
follows:

Article I.        DEFINITIONS

         A.       "Backup Pipeline" is Conoco's 6" pipeline extending from
                  Conoco's Storage Facility in Mont Belvieu, Texas to Orange,
                  Texas.

         B.       "DuPont Ethane Pipeline" is DuPont's 8"/10" pipeline extending
                  from Conoco's Storage Facility in Mont Belvieu, Texas to
                  DuPont's Sabine River Works Facility in Orange, Texas.

         C.       "Product" is Purity Ethane.

         D.       "Call" is a clear and unambiguous communication by DuPont to
                  Conoco indicating a need for movement of Product through the
                  Backup Pipeline, a demand that such movement be undertaken in
                  preference to other movements of products through the Backup
                  Pipeline, and a commitment to pay for such movement in
                  accordance with this Agreement. As most Calls 



Emergency Call Transportation Agreement                                  Page 1
<PAGE>   2

                  will be made under times of immediate need, such Calls may be
                  made orally via telephone by a DuPont representative.

         E.       "Receipt Meter" is the meter (Meter No. 4008) at Mont Belvieu
                  connecting Conoco's storage facility to the Backup Pipeline.

         F.       "Delivery Meter" is the meter (Meter No. 4800) connecting the
                  Backup Pipeline to the DuPont Ethane Pipeline in Orange,
                  Texas.

         G.       "Vista Custody Meter" is the meter (Meter No. 4600) connecting
                  the Backup Pipeline to Vista Chemical Company in Orange,
                  Texas.

         H.       "Effective Date" is the date on which the Conoco initial
                  public offering closes.

Article II.       TRANSPORTATION SERVICES

                  Upon an unexpected and unplanned shutdown of the DuPont Ethane
                  Pipeline or at Conoco's permission, Conoco, pursuant to a Call
                  and subject to limitations of equipment and other
                  circumstances, shall transport Product from the Receipt Point
                  to the Delivery Point. Conoco shall operate the Backup
                  Pipeline so that movements of Product to other customers may
                  be postponed or reduced or transported by alternative means so
                  that DuPont may receive its needs in preference over such
                  other Conoco customers as necessary. At the time when the
                  DuPont Ethane Pipeline has been returned to service, the Call
                  shall be deemed to terminate on this Backup Pipeline and
                  Conoco may resume transportation services to itself and other
                  customers. Consistent with the purposes of this Agreement, the
                  Parties agree to, from time to time, mutually develop metrics
                  for monitoring each other's performance under this Agreement
                  and particularly to aid in the early identification and
                  correction of problems that may arise during the term of the
                  Agreement.

Article III.      FEES AND PAYMENT

                  For each instance where DuPont makes a Call on the Backup
                  Pipeline, DuPont shall pay an interrupt fee of fifty thousand
                  dollars ($50,000). However, if DuPont makes a Call within one
                  year of a previous Call, the interrupt fee shall be
                  twenty-five thousand dollars ($25,000). 

                  A "Transportation Fee" shall also apply to the volume of
                  Product transported pursuant to the Call. At the outset, the
                  Transportation Fee shall be twelve cents ($0.12) per Barrel of
                  Product transported. The Transportation Fee shall also be
                  adjusted based on the percentage change of 



Emergency Call Transportation Agreement                                  Page 2
<PAGE>   3

                  the Dixie Pipeline published tariff from Mont Belvieu, Texas
                  to Hattiesburg, Mississippi. At the outset, the Dixie Pipeline
                  tariff from Mont Belvieu, Texas to Hattiesburg, Mississippi is
                  ninety-seven cents ($0.97) per Barrel.

                  Conoco may issue invoices to DuPont periodically. DuPont
                  agrees to remit payment of all undisputed amounts due to
                  Conoco via wire transfer within thirty (30) days of the date
                  of any invoice issued for services under this Agreement.

                  Conoco will maintain accurate accounts and supporting
                  documentation for all charges related to providing the
                  services under this Agreement and such other records as may
                  reasonably be required by DuPont in accordance with the
                  Generally Accepted Accounting Principles and Practices for a
                  period of at least five years. DuPont may at its option and
                  expense, inspect and audit the accounts of Conoco for the most
                  recent two calendar years relating to any charges imposed by
                  Conoco under this Agreement. Each audit must be conducted
                  during office hours and with at least forty-eight (48) hours
                  advance notice. If DuPont shall require a second audit or
                  inspection in any single year, DuPont shall pay all of
                  Conoco's costs, as determined in Conoco's reasonable
                  discretion, plus any other costs associated with such second
                  audit or inspection.

Article IV.       MEASUREMENT

                  Currently, it is believed that the valve at the Delivery Meter
                  permits a small volume of Product to pass from the Backup
                  Pipeline to the DuPont Ethane Pipeline. Such volume has been
                  determined by subtracting the volumes recorded by the Vista
                  Custody Meter from the volumes recorded by the Delivery Meter
                  and has been accounted for as a delivery to DuPont. Conoco
                  agrees to have the valve repaired in a commercially reasonable
                  timeframe to control deliveries through the Delivery Meter. If
                  the valve is not repaired until after the Effective Date,
                  Conoco shall accrue the volume until the valve is repaired and
                  each month add the accrued volume to the volume delivered to
                  DuPont. (as defined in the Ethane Storage and Throughput
                  Agreement having the same effective date as the Effective Date
                  of this Agreement).

                  After the valve is repaired, the measurement of Product
                  transported to DuPont shall be determined by the Delivery
                  Meter. Custody transfer shall take place at the Delivery Meter
                  in accordance with Conoco's Custody Transfer Mass Measurement
                  Procedure attached as Appendix A. Conoco reserves the right to
                  amend this procedure from time to time, and revised procedures
                  shall govern 30 days after written notice is provided to
                  DuPont.


Emergency Call Transportation Agreement                                  Page 3
<PAGE>   4

                  DuPont will have the right to witness all meter proving and
                  instrument calibrations. DuPont will pay for meter proving
                  requested by DuPont and found to be within acceptable limits
                  according to the attached Appendix A.

Article V.        TERM

                  This Agreement shall commence on the effective date and shall
                  have an initial term of twenty (20) consecutive years. This
                  Agreement may be terminated at Conoco's election if Conoco
                  ceases to operate the DuPont Ethane Pipeline as provided under
                  that certain Pipeline Operation Agreement having the same
                  effective date as this Agreement. In addition, DuPont shall
                  have the right to terminate this Agreement without cause with
                  one year's written notification to Conoco.

Article VI.       LINEFILL

                  The linefill in the Backup Pipeline is owned by Conoco.

Article VII.      COMPLIANCE WITH LAWS AND REGULATIONS

                  The Parties warrant and agree that facilities identified in
                  this Agreement as owned and operated by each Party shall be in
                  substantial compliance throughout the term of this Agreement
                  with all applicable local, state and federal laws,
                  regulations, rules, orders, directives and codes, licenses and
                  permits that apply to the ownership, operation, and
                  maintenance of such facilities. If any provision of this
                  Agreement or the performance of either Party is prevented,
                  abrogated, or substantially modified by lawful government
                  action or court order, the Parties will endeavor in good faith
                  to modify this Agreement so that it may continue in effect.
                  However, should the Parties be unable to reach mutually
                  agreeable terms in order to perpetuate this Agreement, then a
                  Party may terminate this Agreement upon 30 days' written
                  notice.

Article VIII.     LIABILITIES, INDEMNITIES, CLAIMS

         A.       Express Negligence Disclosure. UNLESS THIS AGREEMENT EXPRESSLY
                  PROVIDES TO THE CONTRARY, THE INDEMNITY, RELEASE AND WAIVER
                  PROVISIONS SET FORTH IN THIS AGREEMENT APPLY REGARDLESS OF
                  WHETHER THE INDEMNIFIED PARTY (OR ITS EMPLOYEES, AGENTS,
                  CONTRACTORS, SUCCESSORS OR ASSIGNS) CAUSES, IN WHOLE OR IN
                  PART, INDEMNIFIED CLAIMS ARISING OUT OF OR RESULTING, IN WHOLE
                  OR IN PART, FROM, OUT OF, OR IN CONNECTION WITH, THE STORAGE
                  OR HANDLING OF DUPONT'S 


Emergency Call Transportation Agreement                                  Page 4
<PAGE>   5

                  PRODUCT OR THE OPERATIONS OF CONOCO'S STORAGE FACILITY OR THE
                  INDEMNIFIED PARTY'S (OR ITS REPRESENTATIVES', CONTRACTORS',
                  SUCCESSORS', OR ASSIGNS') SOLE, JOINT, COMPARATIVE OR
                  CONCURRENT NEGLIGENCE, STRICT LIABILITY OR FAULT. DUPONT AND
                  CONOCO ACKNOWLEDGE THAT THIS STATEMENT COMPLIES WITH THE
                  EXPRESS NEGLIGENCE RULE AND IS CONSPICUOUS.

         B.       Conoco shall indemnify and hold DuPont harmless from any loss
                  or liability (including legal fees and expenses) arising from
                  any claim or cause of action for injury to or death of any
                  Conoco employee.

         C.       DuPont shall indemnify and hold Conoco harmless from any loss
                  or liability (including legal fees and expenses) arising from
                  any claim or cause of action for injury to or death of any
                  DuPont employee.

         D.       Conoco shall, to the extent permitted by law, fully indemnify,
                  defend and hold harmless, DuPont, with respect to any and all
                  claims, losses, damages, fines, debts, cost, expenses, and
                  penalties, liabilities, causes of action, including without
                  limitation, settlement costs and any reasonable legal or other
                  expenses paid to a third party for investigating or defending
                  any actions or threatened actions, (herein collectively
                  referred to as "Losses"), to the extent such Losses are
                  incurred by DuPont arising out of or as a result of any
                  negligence, willful misconduct, breach of contract or
                  violations of law or regulation by Conoco, its employees,
                  agents, subcontractors or assigns in the performance of
                  services provided pursuant to this Agreement. The Losses
                  covered under this paragraph, unless provided for in
                  paragraphs B and C above, include, without limitation, Losses
                  from actual or alleged (1) injury to or death of any person,
                  including agents, subcontractors and assigns of DuPont, (2)
                  loss of or damage to property including, without limitation,
                  property of DuPont and (3) damage to the environment.

         E.       DuPont shall, to the extent permitted by law, fully indemnify,
                  defend and hold harmless, Conoco, with respect to any and all
                  claims, losses, damages, fines, debts, cost, expenses, and
                  penalties, liabilities, causes of action, including without
                  limitation, settlement costs and any reasonable legal or other
                  expenses paid to a third party for investigating or defending
                  any actions or threatened actions, (herein collectively
                  referred to as "Losses"), to the extent such Losses are
                  incurred by Conoco arising out of or a result of any
                  negligence, willful misconduct, breach of contract or
                  violations of law or regulation by DuPont, its employees,
                  agents, subcontractors or assigns in the performance of
                  services provided pursuant to this Agreement. The Losses
                  covered under this paragraph, unless provided for in
                  paragraphs B and C above, include, without limitation, Losses
                  from actual or alleged 



Emergency Call Transportation Agreement                                  Page 5
<PAGE>   6

                  (1) injury to or death of any person, including agents,
                  subcontractors and assigns of Conoco, (2) loss of or damage to
                  property including, without limitation, property of Conoco and
                  (3) damage to the environment.

         F.       Joint Responsibility. In circumstances that both Parties are
                  in some measure responsible for Losses as described in
                  Paragraphs D and E above, the Parties shall indemnify the
                  other to the extent of its proportional share of its
                  responsibility of such Losses.

         G.       Waiver of Consequential and Punitive Damages. NOTWITHSTANDING
                  ANYTHING TO THE CONTRARY CONTAINED IN THIS AGREEMENT OR AT LAW
                  OR IN EQUITY, IN NO EVENT SHALL CONOCO BE LIABLE FOR PUNITIVE,
                  SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES (INCLUDING WITHOUT
                  LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS, BUSINESS
                  INTERRUPTION OR ANY OTHER LOSS) ARISING FROM OR RELATING TO
                  ANY CLAIM MADE UNDER THIS AGREEMENT OR REGARDING THE PROVISION
                  OF OR THE FAILURE TO PROVIDE THE STORAGE AND THROUGHPUT
                  SERVICES HEREUNDER, EVEN IF CONOCO HAS BEEN ADVISED OF THE
                  POSSIBILITY OF SUCH DAMAGES.

         H.       Exclusive Remedy. The terms and provisions of this Article
                  VIII shall be the sole and exclusive remedy of each of the
                  Parties indemnified hereunder with respect to the transactions
                  contemplated in this Agreement.

         I.       Notice of Claims. Notice of claims for loss, damage, or
                  indemnity in connection with the services provided under this
                  Agreement must be made to Conoco in writing within ninety (90)
                  days after the same having become known to DuPont or should
                  have become known to DuPont. Such claims must be set forth in
                  specific detail and must be delivered to Conoco within the
                  ninety (90) day period and, unless so made and delivered to
                  Conoco, Conoco shall be wholly released and discharged
                  therefrom and shall not be liable therefore in any manner
                  whatsoever. Conoco shall use best efforts to respond timely to
                  any DuPont claim. No suit at law or in equity shall be
                  maintained upon any claim unless such claim is brought within
                  two (2) years of Conoco's refusal to accept such claim.

Article IX.       FORCE MAJEURE

         A.       Force Majeure. Neither Party shall be liable to the other for
                  failure or delay in performance under this Agreement to the
                  extent that the failure or delay is due directly or indirectly
                  to Force Majeure, which is herein defined to include without
                  limitation, Acts of God or other causes beyond the 




Emergency Call Transportation Agreement                                  Page 6
<PAGE>   7

                  reasonable control of the Parties, war (whether declared or
                  not), fire, flood, lightning, hurricane or other storm,
                  earthquake, acts of public enemy, explosion, scheduling,
                  operational and maintenance restrictions, rebellion, riot,
                  insurrections, sabotage, invasion, accident, epidemic,
                  strikes, lockouts or other labor difficulties or industrial
                  disturbances, compliance with acts, rules, regulations, or
                  orders of federal, state, or local government, any agency
                  thereof or any other authority having or purporting to have
                  jurisdiction, mechanical failures or similar causes not due to
                  either Party's fault or negligence, official order or
                  industry-wide request, any inability to secure necessary parts
                  or materials, including the inability to secure materials by
                  reason of allocations promulgated by authorized governmental
                  agencies, or any other contingency beyond the control of the
                  affected Party which interferes with the performance
                  hereunder.

         B.       Suspension of Performance. Performance under this Agreement
                  shall be suspended (except for the payment of money due or to
                  become due for past performance hereunder) during the period
                  of such Force Majeure to the extent made necessary by the
                  Force Majeure; provided, the settlement of strikes, lockouts,
                  industrial disputes, or disturbances shall be entirely within
                  the discretion of the Party so settling to accede to the
                  demands of the demands of any opposing party when such course
                  is inadvisable in the discretion of the Party having the
                  difficulty.

         C.       No Effect on Term. No curtailment, suspension, or acceptance
                  of performance pursuant to this Article IX shall operate to
                  extend the term of, or to terminate, this Agreement.
                  Performance under this Agreement shall resume to the extent
                  made possible by the end or amelioration of the Force Majeure
                  event.

         D.       Notice. A Party claiming Force Majeure shall notify the other
                  Party immediately by telephone, E-mail and/or fax and confirm
                  the same in writing, giving reasonable detail regarding the
                  type of Force Majeure and its estimated duration.

Article X.        MISCELLANEOUS PROVISIONS

         A.       Taxes. DuPont shall pay any and all lawful taxes, assessments,
                  or charges levied or assessed against DuPont's Product or
                  other assets including, but not limited to, any gross receipts
                  tax, use tax, sales tax and ad valorem tax. DuPont shall
                  immediately reimburse Conoco for any such taxes, assessments
                  or charges paid by Conoco on behalf of DuPont upon receipt of
                  notice of payment. Conoco shall pay all income-related taxes
                  and all employee-related taxes and charges such as
                  withholdings, FICA, FICM, unemployment and other similar
                  taxes.


Emergency Call Transportation Agreement                                  Page 7
<PAGE>   8

         B.       Notice. All notices, demands, request and other communications
                  necessary to be given hereunder shall be in writing and deemed
                  given if personally delivered, forwarded by facsimile
                  transmission (with proof of transmission capability), or
                  mailed by either certified mail, return receipt requested, or
                  sent by recognized overnight carrier to the respective Party
                  at its address below:

                           If to Conoco:

                                    Conoco Inc.
                                    P.O. Box 2197
                                    Houston, Texas 77252-2197
                                    Attn: Director, Fractionation Services and 
                                          Logistics
                                    Telephone: (281) 293-1198
                                    Facsimile: (281) 293-5990

                           If to DuPont and related to:

                                    Pricing and contract issues:

                                            DuPont Sourcing
                                            P.O. Box 80022
                                            Wilmington, DE  19880-0022
                                            Attn:  Sourcing Manager
                                            Telephone: (302) 992-6085
                                            Facsimile: (302) 992-3966

                                    Legal issues:

                                            DuPont Legal
                                            1007 Market Street
                                            Wilmington, DE  19898
                                            Attn: Logistics and Commerce Counsel
                                            Telephone: (302) 774-1539
                                            Facsimile: (302) 774-4812

                                    Operations, Day to Day issues:

                                            DuPont Packaging and Industrial 
                                            Polymers
                                            1007 Market Street
                                            Wilmington, DE  19898
                                            Attn:  Manager, Contract 
                                                   Manufacturing
                                            Telephone: (302) 774-6105
                                            Facsimile: (302) 774-2005



Emergency Call Transportation Agreement                                  Page 8
<PAGE>   9

         C.       Assignment. Neither Party shall assign any portion of its
                  rights or obligations under this Agreement without the prior
                  written consent of the other, which consent shall not be
                  unreasonably withheld; provided however, either Party may
                  assign this Agreement to a parent corporation, or any
                  subsidiary or affiliate with respect to which it holds at
                  least fifty-one percent (51%) of the voting stock, without the
                  consent of the other Party; provided further, the original
                  Parties to this Agreement shall remain primarily obligated
                  hereunder. This Agreement shall be binding upon and inure to
                  the benefit of the Parties hereto, their successors and
                  assigns and nothing contained in this Agreement, express or
                  implied, is intended to confer upon any other person or entity
                  any benefits, rights, or remedies. Notwithstanding the
                  foregoing, DuPont shall have the right to freely assign its
                  entire interest in this Agreement to a third party pursuant to
                  such third party acquiring DuPont assets that are served by
                  Conoco under this Agreement.

         D.       Rules and Regulations. This Agreement and the provisions
                  hereof shall be subject to, and the Parties agree to comply
                  with, all applicable local, state, and federal laws and to all
                  applicable rules, regulations, orders and directives of any
                  governmental authority, agency, commission, or regulatory body
                  in connection with any and all matters or things under or
                  incident to this Agreement. The Parties warrant to one another
                  that they comply with all applicable laws, rules, orders, and
                  regulations of governmental authority covering the production,
                  sale and delivery of the goods or services specified herein,
                  including, but not limited to, the Equal Opportunity Clause
                  prescribed in 41 CFR 60-1.4; the Affirmative Action Clause
                  prescribed in 41 CFR 60-250.4, regarding disabled veterans and
                  veterans of the Vietnam Era; the Affirmative Action Clause for
                  Handicapped Workers prescribed in 41 CFR 60-741.4; 48 CFR
                  Chapter 1 Subpart 19.7 regarding Small Business and Small
                  Disadvantaged Business Concerns; 48 CFR Chapter 1 Subpart 20.3
                  regarding Utilization of Labor Surplus Area Concerns;
                  Executive Order 12138 and regulations thereunder regarding
                  subcontracts to women-owned business concerns; Affirmative
                  Action Compliance Program (41 CFR 60-1.40); annually file
                  SF-100 Employer Information Report (41 CFR 60-1.7); 41 CFR
                  60-1.8 prohibiting segregated facilities; and the Fair Labor
                  Standards Act of 1938, as amended.

         E.       Governing Law, Waiver of Jury Trial and Consent to
                  Jurisdiction. THIS AGREEMENT SHALL BE GOVERNED, CONSTRUED, AND
                  ENFORCED IN ACCORDANCE WITH THE LAWS OF THE STATE OF DELAWARE
                  IRRESPECTIVE OF THE RESIDENCE, PLACE OF 



Emergency Call Transportation Agreement                                  Page 9
<PAGE>   10

                  BUSINESS, OR DOMICILE OF THE PARTIES HERETO OR PLACE OF
                  EXECUTION BY ANY PARTY HERETO, AND NOTWITHSTANDING ANY
                  CONFLICT OF LAWS OR PROVISIONS TO THE CONTRARY. THIS AGREEMENT
                  SHALL NOT BE GOVERNED BY THE U. N. CONVENTION ON CONTRACTS FOR
                  THE INTERNATIONAL SALE OF GOODS. IN ADDITION, EACH PARTY
                  HEREBY (a) WAIVES ANY AND ALL RIGHTS IT MAY HAVE TO A JURY
                  TRIAL IN CONNECTION WITH ANY MATTER OR RIGHT ARISING UNDER
                  THIS AGREEMENT OR RELATING TO THE TRANSITIONAL SERVICES, (b)
                  CONSENTS TO THE EXCLUSIVE JURISDICTION OF ANY STATE OR FEDERAL
                  COURT WITHIN THE STATE OF DELAWARE AND IRREVOCABLY AGREES THAT
                  ALL ACTIONS OR PROCEEDINGS ARISING UNDER OR RELATING TO THIS
                  AGREEMENT OR THE TRANSITIONAL SERVICES SHALL BE LITIGATED IN
                  ANY SUCH COURT, AND (c) WAIVES ANY OBJECTION WHICH IT MAY HAVE
                  BASED UPON IMPROPER VENUE OR FORUM NON CONVENIENS TO THE
                  CONDUCT OF ANY PROCEEDINGS IN ANY SUCH COURT.

         F.       Alternative Dispute Resolution.

                  1.       Both Parties understand and appreciate that their
                           long term mutual interests will be best served by
                           affecting a rapid and fair resolution of any claims
                           or disputes which may arise out of this Agreement.
                           Therefore, both Parties agree to use their best
                           efforts to resolve all such disputes as rapidly as
                           possible on a fair and equitable basis. Toward this
                           end both Parties agree to develop and follow a
                           process for presenting, rapidly assessing, and
                           settling claims and other disputes on a fair and
                           equitable basis.

                  2.       If any dispute or claim arising under this Agreement
                           cannot be readily resolved by the Parties pursuant to
                           Paragraph F.1 above, the Parties agree to refer the
                           matter to a panel consisting of one (1) senior
                           executive from each Party for review and resolution.
                           The senior executive shall not have been directly
                           involved in the claim or dispute. A copy of the
                           Agreement, relevant facts, areas of disagreement, and
                           concise summary of the basis for each side's
                           contentions will be provided to both executives who
                           shall review the same, confer, and attempt to reach a
                           mutual resolution of the issue. The senior executives
                           shall attempt to meet and resolve the dispute within
                           thirty (30) days of their appointment.

                  3.       If the dispute cannot be resolved, under the process
                           set forth in Paragraph F.2 above, within ten (10)
                           days from the date of the 



Emergency Call Transportation Agreement                                 Page 10
<PAGE>   11

                           panel's conference, the Parties agree to attempt to
                           resolve the dispute or claim through non-binding
                           mediation. The Parties shall select a single
                           qualified Mediator, knowledgeable in the pertinent
                           industry, who is not presently affiliated with or
                           related to either Party. The Mediator shall hold a
                           hearing (not to exceed one (1) day) as soon as
                           practicable after his appointment (but not later than
                           thirty (30) days after his appointment) during which
                           each Party shall present its version of the matter,
                           supported, if desired, by a brief statement of the
                           issue(s), sworn, written testimony, relevant
                           documents, its assessment of damages, and its
                           argument. The Parties shall provide the Mediator with
                           copies of all such materials as well as any documents
                           provided to their senior executives under Paragraph
                           F.2 at least ten (10) days prior to the scheduled
                           date of the mediation hearing. The Parties may also
                           provide the Mediator with copies of any laws or
                           regulations which they feel are relevant to the
                           dispute. A copy of the Contract will be provided to
                           the Mediator. Formal written arguments, legal
                           memoranda, and live testimony are discouraged but may
                           be permitted at the discretion of the Mediator. Both
                           Parties agree to make any relevant and involved
                           employees or documents available to the other Party
                           for its review and use in preparing its position
                           under this clause without the need for subpoena or
                           other court order.

                  4.       The Mediator, within ten (10) days of the completion
                           of the hearing, will meet separately with both
                           Parties and provide each of them, on a confidential
                           basis, with his/her written views of the strengths
                           and weaknesses of their respective positions. The
                           Parties will then reconvene and, with the assistance
                           of the Mediator, attempt to resolve the matter. If
                           resolution cannot be achieved by the Parties within
                           forty-eight (48) hours of this second meeting, the
                           Mediator will, within ten (10) additional days, issue
                           a written, non-binding decision on the issue.

                  5.       Each Party shall, within five (5) days of the
                           Mediator's written decision, notify the other in
                           writing whether it will accept or reject that
                           decision. If the matter has not been resolved
                           utilizing the processes set forth in this clause and
                           the Parties are unwilling to accept the non-binding
                           decision of the Mediator, either or both Parties may
                           elect to pursue resolution through litigation.

                  6.       The selected Mediator shall execute a confidentiality
                           agreement, satisfactory to all Parties, prior to
                           his/her active participation in the 



Emergency Call Transportation Agreement                                 Page 11
<PAGE>   12

                           mediation. The costs of the Mediator shall be shared
                           equally by the Parties. Each Party will bear its own
                           costs of mediation.

                  7.       If the Parties cannot agree upon a choice of a
                           Mediator within ten (10) days of the date of the
                           panel's conference pursuant to Paragraph F.2, either
                           or both Parties may elect to directly pursue
                           litigation.

                  8.       All statements, correspondence, memoranda, briefs,
                           decisions, testimony, communications, and materials,
                           whether written or oral, submitted to or generated by
                           the panel and/or Mediator in connection with the
                           processes set forth above shall be deemed to be in
                           furtherance of settlement negotiations and shall be
                           privileged and shielded from production and
                           disclosure in any subsequent litigation.
                           Notwithstanding the foregoing, documents prepared in
                           the normal course of business, such as invoices,
                           shall be subject to discovery in subsequent
                           litigation in accordance with applicable law.

         G.       Hazards. EACH PARTY ACKNOWLEDGES THAT THERE ARE HAZARDS
                  ASSOCIATED WITH THE STORAGE AND USE OF PRODUCT, THAT IT
                  UNDERSTANDS SUCH HAZARDS, AND THAT IT IS ITS OWN
                  RESPONSIBILITY TO WARN AND PROTECT ITS EMPLOYEES AND OTHERS
                  WHO MAY BE EXPOSED TO SUCH HAZARDS IN CONNECTION WITH ITS
                  RESPONSIBILITIES AND OBLIGATIONS CONCERNING THE STORAGE AND
                  USE OF THIS PRODUCT CONTEMPLATED BY THIS AGREEMENT.

         H.       Headings. Headings used in this Agreement are for convenience
                  of the Parties only, and shall not be taken into account in
                  construing or interpreting this Agreement.

         I.       Entire Agreement. This Agreement contains the entire Agreement
                  and understanding of the Parties with respect to the matters
                  contained herein and there are no promises, assurances, terms,
                  conditions, or obligations, whether by precedent or otherwise,
                  other than those contained herein.

         J.       Amendment. This Agreement shall not be amended or modified
                  except by written instrument executed by duly authorized
                  representatives of the respective Parties.

         K.       Counterparts. This Agreement may be executed in counterparts,
                  each of which shall constitute on original and all of which
                  shall constitute one document.

         L.       Waivers. No waiver of the provisions hereof shall be effective
                  unless in writing and signed by the Party to be charged with
                  such waiver. No waiver shall be deemed a continuing waiver or
                  waiver in respect to any subsequent 



Emergency Call Transportation Agreement                                 Page 12
<PAGE>   13

                  breach or default, either of a similar or dissimilar nature,
                  unless expressly so stated in writing.

         M.       Confidentiality. Neither Conoco nor DuPont shall disclose any
                  term or condition of this Agreement without the prior written
                  consent of the other Party, which consent will not be
                  unreasonably withheld. In the event of the termination of this
                  Agreement, Conoco and DuPont shall, to the extent permitted by
                  law, keep confidential and not use any confidential
                  information obtained pursuant to this Agreement, unless prior
                  written consent is obtained or such information is readily
                  ascertainable from public or published information or trade
                  sources or is received by a Party from a third party having no
                  obligation of confidentiality with respect to such
                  information.

         N.       Default. In the event either Party to this Agreement shall
                  default in the performance of any obligations specified, the
                  nondefaulting Party shall notify the other Party in writing,
                  and if such default is not remedied with reasonable
                  promptness, then the nondefaulting Party shall have the right
                  to terminate this Contract immediately. Termination under this
                  Article, or under any other Article of this Contract, shall
                  not relieve or release either Party from any liability which
                  accrued prior to the date of such termination.

         O.       CHEMTREC. The Parties agree to use CHEMTREC to report any
                  chemical emergency relating to any Product under this
                  Agreement.

         P.       Safety. The Parties are vitally interested in safety and in
                  the safe practices of all activities covered under this
                  Agreement. Thus, Parties agree to maintain mutually agreeable
                  safety standards for activities covered under this Agreement
                  which are no less stringent than safety standards which are in
                  effect at the Effective Date. In addition to endeavoring to
                  maintain high safety standards, the Parties agree that its
                  employees, contractors, subcontractors and agents shall
                  respect and abide by the other Party's plant and site safety
                  rules when the one Party has personnel on the other Party's
                  plant or site.

         Q.       Independent Contractor. It is understood that employees,
                  methods, facilities, and equipment of Conoco shall at all
                  times be under its exclusive direction and control. Conoco's
                  relationship to DuPont shall be that of an independent
                  contractor. Nothing in the Contract shall be construed to
                  constitute Conoco, or any of its employees, as an agent,
                  associate, joint venturer, or partner of DuPont. However,
                  DuPont may from time to time appoint, in writing, Conoco to
                  act as an agent for limited purposes.

         R.       Minority Vendors. The Parties agree to provide maximum
                  practicable utilization of Minority subcontractors and vendors
                  among its sources of 



Emergency Call Transportation Agreement                                 Page 13
<PAGE>   14

                  supply in the performance of this Contract. Minorities include
                  but are not limited to Black Americans, Hispanic Americans,
                  Native Americans, Asian Pacific Americans, and Native Hawaiian
                  Organizations. A Minority business is at least fifty-one
                  percent (51%) owned by a Minority or group of Minorities and
                  has its management and daily business controlled by one (1) or
                  more such individuals. Conoco shall report to DuPont on a
                  quarterly basis the dollar amounts paid by Conoco during the
                  previous quarter to minority subcontractors and vendors for
                  goods and services used in the performance of this Agreement.

         S.       Year 2000 Compliance.

                  1.       Each Party covenants and agrees that it will not
                           permit a Year 2000 Problem to computer systems,
                           software or equipment owned, leased or licensed by
                           it, its affiliates or subsidiaries to interfere with
                           its performance under this Agreement. Each Party
                           further agrees to request from those of its suppliers
                           whose performance may materially affect that Party's
                           performance hereunder, that each such supplier
                           undertake the same obligation with respect to such
                           material performance. The Parties will use reasonable
                           commercial efforts to cooperate and share information
                           to further comply with this Article, and to minimize
                           the impact of Year 2000 Problems on performance of
                           this Agreement. Each Party will inform the other
                           Party of any circumstance indicating a possible
                           obstacle to such compliance, and the steps being
                           taken to avoid or overcome the obstacle.

                  2.       Provided a Party complies with Paragraph S.1 above,
                           such Party will not be liable to the other Party
                           hereto for any failure to perform obligations under
                           this Agreement to the extent such failure to perform
                           arises from a Year 2000 Problem a) affecting one of
                           the non-performing Party's suppliers or b) beyond
                           that Party's reasonable control (e.g. a Year 2000
                           Problem affecting a governmental entity). IN
                           PARTICULAR SUCH NON-PERFORMING PARTY SHALL HAVE NO
                           LIABILITY FOR ANY DAMAGES, INCLUDING DIRECT,
                           INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL,
                           PUNITIVE OR EXEMPLARY DAMAGES.

                  3.       A "Year 2000 Problem" means a date handling problem
                           relating to the Year 2000 date change that would
                           cause a computer system, software or equipment to
                           fail to correctly perform, process and handle date
                           related data for the dates within and between the
                           twentieth and twenty-first centuries and all other
                           centuries.



Emergency Call Transportation Agreement                                 Page 14
<PAGE>   15

         T.       Continuous Improvement. The Parties will meet from time to
                  time, preferably at least once per year, to consider potential
                  operating cost saving measures that may be employed in the
                  performance of services rendered under this Agreement. The
                  Parties agree that, to the extent that operating cost savings
                  are achieved, each Party will share with the other, on a 50/50
                  basis, the benefits of any cost savings realized for the
                  remainder of the term.

         U.       Controlled Substance Abuse. The Parties agree that the use,
                  possession, manufacture, dispensing, sale and distribution of
                  alcohol, drugs, and other controlled substances on their
                  respective premises and on or in vehicles and equipment used
                  for the purposes of this Agreement shall be prohibited. In
                  addition, the Parties shall prohibit from their property the
                  presence of any individual having a controlled substance in
                  his/her body for non-medical reasons. The Parties shall
                  develop a mutually agreeable Controlled Substance Abuse
                  policy, including drug testing, which is at least as rigorous
                  as Conoco's current policy and complies with DOT's policy
                  relating to pipeline operations.

IN WITNESS WHEREOF, the Parties hereto have caused this Agreement to be executed
on the day indicated.

                    Conoco Inc.

                    By:
                        -------------------------------------

                    Title:
                           ----------------------------------

                    Date:
                           ----------------------------------


                    E. I. du Pont de Nemours and Company

                    By:
                        -------------------------------------

                    Title:
                           ----------------------------------

                    Date:
                           ----------------------------------



Emergency Call Transportation Agreement                                 Page 15
<PAGE>   16

                                                                  EXHIBIT 10.18





                    ETHANE STORAGE AND THROUGHPUT AGREEMENT


This Ethane Storage and Throughput Agreement ("Agreement") is effective as of
7:00 a.m. Mont Belvieu, Texas local time, on the Effective Date by and between
Conoco Inc., a Delaware corporation with its principal place of business at 600
North Dairy Ashford Road, Houston, Texas 77079 ("Conoco") and E. I. du Pont de
Nemours and Company, a Delaware corporation, with its principal place of
business at 1007 Market Street, Wilmington, Delaware 19898 ("DuPont").  (Conoco
and DuPont are at times referred to herein individually as a "Party" and
collectively as "Parties").

                                   WITNESSETH

         WHEREAS, prior to the initial public offering of Conoco (as defined in
the Restructuring, Transfer and Separation Agreement), Conoco has heretofore
provided certain ethane storage, throughput and operational services to DuPont
at Conoco's Mont Belvieu Storage Facility, located in Chambers County, Texas;
and

         WHEREAS, DuPont desires to continue to lease underground storage space
from Conoco for the storage of ethane and has requested that certain such
services continue pursuant to this Agreement; and

         WHEREAS, Conoco and DuPont do now desire to enter into this Agreement
which will, effective as of the Effective Date, provide for the storage and
throughput of DuPont's ethane by Conoco; and

         NOW, THEREFORE, subject to and in consideration of the terms,
conditions and covenants contained in this Agreement, Conoco and DuPont agree
as follows:

Article I.       DEFINITIONS

         A.      "Barrel" means a volume of forty-two (42) U.S. standard
                 gallons.

         B.      "Reserved Volume(s)" means two million four hundred thousand
                 (2,400,000) Barrels of Product (one million, five hundred
                 thousand (1,500,000) Barrels of Ethane-Propane Mix and nine
                 hundred thousand (900,000) Barrels of Purity Ethane.

         C.      "Effective Date" means the date on which the Conoco initial
                 public offering closes.

         D.      "Contract Year" means a period of twelve consecutive months,
                 which shall commence on the Effective Date or on the
                 anniversary of the Effective Date each year.

         E.      "Day" means a period of twenty-four (24) consecutive hours
                 commencing at 7:00 a.m. Mont Belvieu, Texas local time and
                 ending at 7:00 a.m. on the following day.




Ethane Storage and Throughput Agreement                                   Page 1
<PAGE>   17
         F.      "Delivery Point" means either or both of the custody transfer
                 meter(s) that measures the volume of Product delivered into:
                 Meter No MU3006 delivering from the Storage Facility into
                 DuPont's 8"/10" Pipeline in Mont Belvieu, Texas; and Meter No.
                 MU4800 delivering from Conoco's 6" Pipeline into DuPont's
                 8"/10" in Orange, Texas.

         G.      "EP Storage Well" means that certain underground storage
                 cavern, No. W-3003, located at the Storage Facility presently
                 used for the storage of Ethane-Propane Mix.

         H.      "Excess Throughput" means that volume of Product which is
                 received at the Receipt Point in any one Contract Year in
                 excess of the Reserved Volume.

         I.      "Fractionator(s)" means those facilities located in or near
                 Mont Belvieu, Texas used to separate natural gas liquids into
                 component parts, including without limitation the Gulf Coast
                 Fractionator, Cedar Bayou Fractionator (formerly Warren), Koch
                 Hydrocarbons Fractionator and Enterprise Products
                 Fractionator.

         J.      "Storage Customer" means all persons or entities, including
                 DuPont and Conoco, storing Product in Conoco's Storage
                 Facility.

         K.      "Mont Belvieu Storage Facility" or "Storage Facility" means
                 Conoco's owned and operated underground storage caverns and
                 related equipment located at Mont Belvieu, Chambers County,
                 Texas, situated on a 91.317 acre tract in the Henry Griffith
                 League Abstract No. A-12, Volume 353, Page 581, Deed Records
                 of Chambers County, Texas.

         L.      "Product" means Purity Ethane and/or Ethane-Propane Mix.

         M.      "Purity Ethane" means a hydrocarbon stream consisting
                 primarily of ethane (C2H6), that is condensed, absorbed, or
                 separated out of natural gas with specifications as
                 established from time to time by Conoco, owner and operator of
                 the Mont Belvieu Storage Facility, and by the operators of the
                 Fractionators.  A copy of the current Purity Ethane product
                 specifications is attached as Appendix A.

         N.      "Ethane-Propane Mix" means a hydrocarbon stream consisting
                 primarily of ethane (C2H6) with a substantial propane
                 component (C3H8), that is condensed, absorbed, or separated
                 out of natural gas with specifications as established from
                 time to time by Conoco, owner and operator of the Mont Belvieu
                 Storage Facility, and by the operators of the Fractionators.
                 A copy of the current Ethane-Propane Mix product
                 specifications is attached as Appendix A.





Ethane Storage and Throughput Agreement                                   Page 2
<PAGE>   18
         O.      "Purity Ethane Storage Well" means that certain underground
                 storage cavern, No. W-3001, located at Conoco's Mont Belvieu
                 Storage Facility presently used for the storage of Purity
                 Ethane.

         P.      "Receipt Point" means, as to Purity Ethane, any or all of (a)
                 the respective custody transfer meters that measure Purity
                 Ethane volume delivered from the Gulf Coast Fractionator to
                 Conoco (No. MU4010), the Koch Hydrocarbons Fractionator to
                 Conoco (No. MU3010) and the Enterprise Products Fractionator
                 to Conoco (No. FQ164), all located at or near Mont Belvieu,
                 Texas; and (b) Conoco's Storage Facility where DuPont may
                 receive Purity Ethane volume by inventory transfer from other
                 Storage Customers; as to Ethane-Propane Mix, (a) the
                 respective custody transfer meters that measure Ethane-Propane
                 Mix volume from Diamond Shamrock Storage Facility, Meter No.
                 0108, and the Dynegy Storage Facility, Meter No. 76; and (b)
                 Conoco's Storage Facility where DuPont may receive
                 Ethane-Propane Mix by inventory transfer from other Storage
                 Customers.

         Q.      "Storage Cavern(s)" or "Storage Well(s)" means any or all of
                 Conoco's owned and operated underground storage wells located
                 at the Mont Belvieu Storage Facility including the EP Storage
                 Well and the Purity Ethane Storage Well.

         R.      "Storage Volume(s)" means the net current inventory of
                 DuPont's Product(s) in the Storage Well(s).

         S.      "Reservation Fee" means the fee for Reserved Volume for a
                 Contract Year.

         T.      "Cost per Reserved Barrel" means the cost, under any
                 particular storage arrangement, for the reservation of storage
                 space and the relevant annual throughput cost including the
                 value of product reduced by Loss Allowance, divided by the
                 number of Barrels of reserved volume.  An example calculation
                 of the Cost per Reserved Barrel for storage under the initial
                 terms of this Agreement are included in Appendix C.

Article II.      TERM

                 This Agreement shall be in full force and effect as of 7:00
                 a.m. Mont Belvieu, Texas local time on the Effective Date, and
                 shall continue in effect for a period of thirty (30) Contract
                 Years, unless terminated earlier as provided elsewhere in this
                 Agreement.  DuPont shall have the right to terminate this
                 Agreement without cause upon written notification to Conoco of
                 at least one year.





Ethane Storage and Throughput Agreement                                   Page 3
<PAGE>   19
Article III.     VOLUME AND STORAGE CAPACITY

         A.      Storage Space.  DuPont agrees to reserve and Conoco agrees to
                 lease a total of two million, four hundred thousand
                 (2,400,000) Barrels of storage space at Conoco's Mont Belvieu
                 Storage Facility allocated as follows: one million, five
                 hundred thousand (1,500,000) Barrels of storage space in the
                 EP Storage Well; and nine hundred thousand (900,000) Barrels
                 of storage space in the Purity Ethane Storage Well.

         B.      Excess Storage Volumes.  Only upon the prior written consent
                 of Conoco, and subject to payment of all applicable fees
                 including additional fees as provided in Article VII.D shall
                 DuPont have Storage Volume in excess of Reserved Volume at any
                 time, during the term of this Agreement.

         C.      Sublease Permitted.  DuPont shall be permitted to sublease any
                 or all of the storage space leased under this Agreement.  At
                 any time DuPont enters into a subleasing arrangement with a
                 third party, DuPont shall notify Conoco as to the volumes to
                 be stored, the name and address of the third party and the
                 terms and conditions of the sublease arrangement.  However,
                 all volumes stored under this Agreement shall be treated by
                 Conoco as DuPont volumes and in no event shall Conoco have any
                 liability to such third party or have any obligation to
                 account to such third party under this Agreement.

Article IV.      OPERATIONS AND THROUGHPUT CAPABILITY

         A.      Conoco's Storage Facility.  Conoco operates at least one
                 Storage Well in addition to the Storage Wells which are the
                 subject of this Agreement and may add additional Storage Wells
                 at the Storage Facility.  The additional Storage Well is
                 presently used to store products different than the Products
                 covered by this Agreement.  All of the Storage Wells are
                 connected to centrally located pipeline header facilities
                 operated by Conoco on its property in the vicinity of the
                 Storage Wells.  All Products delivered by DuPont into, or by
                 Conoco out of, storage must be delivered by pipeline to such
                 header facilities, and all such deliveries shall be deemed a
                 delivery into or out of storage.

         B.      Product Delivery and Receipts.  It is DuPont's responsibility
                 to make all arrangements necessary to deliver Product into
                 storage and to receive Product from storage at Conoco's
                 Storage Facility, and to pay any charges imposed by any third
                 party and paid by Conoco for the collection, transfer, and
                 injection of DuPont's Product to such header facilities for
                 delivery into storage under this Agreement.

         C.      Daily Throughput Volumes.  Subject to Conoco's Delivery,
                 Receipt and Allocation restrictions set forth in Article IV.D,
                 Conoco's Maximum





Ethane Storage and Throughput Agreement                                   Page 4
<PAGE>   20
                 Volume Capability set forth in Article IV.E, Conoco's
                 Limitation on Product Loss set forth in Article V.C, and the
                 Force Majeure restrictions set forth in Article XI, Conoco
                 allocates to DuPont the following maximum Receipt Point and
                 Delivery Point volume capabilities:

                 1)       Receipts into the EP Storage Well:  thirty thousand
                          (30,000) Barrels per day;

                 2)       Receipts into the Purity Ethane Storage Well from all
                          Fractionators: forty-five thousand (45,000) Barrels
                          per day;

                 3)       Delivery Point volume capability of up to a maximum
                          of forty thousand (40,000) Barrels per day from the
                          EP Storage Well;

                 4)       Delivery Point volume capability of up to a maximum
                          of twenty thousand (20,000) Barrels per day from the
                          Purity Ethane Storage Well.

                 5)       In no event is this Article IV.C to be construed to
                          require Conoco to make any expenditure to increase
                          Receipt Point or Delivery Point capabilities.  Conoco
                          may from time to time, but is not obligated to,
                          provide DuPont additional new or existing Delivery
                          Point and Receipt Point volume capability at any time
                          that such capability is available and such additional
                          capability is not required by other Storage Customers
                          as determined by Conoco.

         D.      Delivery and Receipt Restrictions; Allocation.  The delivery
                 and receipt flow rates into and out of storage set forth in
                 Article IV.C are subject to Conoco's scheduling, operational
                 and maintenance restrictions including, without limitation,
                 brine handling restrictions and Storage Facility outages to
                 conduct integrity tests of the Storage Wells.  If Conoco's
                 scheduling, operational or maintenance restrictions will not
                 permit all of the Storage Customers (including Conoco) to
                 deliver or receive the volumes of product requested, then
                 Conoco shall allocate among such parties Conoco's available
                 flow rates in a fair and equitable manner as determined by
                 Conoco.  Conoco shall give DuPont timely notice of any
                 scheduled maintenance work on Conoco's Storage Facility which
                 will interrupt acceptance or redelivery of any Products
                 hereunder and, if scheduling and operational restrictions
                 exist at the time DuPont schedules movements of Product, then
                 Conoco will verbally notify DuPont of such restrictions.

         E.      Maximum Volume Capability.  Conoco allocates to DuPont a
                 Delivery Point volume capability of forty-five thousand
                 (45,000) Barrels per Day of Product (take-away capacity).
                 Conoco may, but is not obligated to, provide additional daily
                 Delivery Point volume capability from its Storage Facility at
                 any time that such capability is not required by other Storage
                 Customers as determined by Conoco.





Ethane Storage and Throughput Agreement                                   Page 5
<PAGE>   21
         F.      Removal of Product.  DuPont must remove all Product from the
                 Storage Facility no later than thirty (30) Days from the last
                 Day of the Term of this Agreement, and such removal shall be
                 subject to the prior full payment of any accrued Reservations
                 Fees, Throughput Fees, Excess Storage Fees and other charges,
                 and to the other terms, provisions, and conditions of this
                 Agreement.

         G.      Commingling.  DuPont agrees that Conoco shall have the right
                 to commingle DuPont's Purity Ethane with Purity Ethane
                 belonging to others and Ethane-Propane Mix with Ethane-Propane
                 Mix belonging to others and Conoco is not obligated to
                 redeliver to DuPont the identical Product received from
                 DuPont.  Conoco shall not be liable for any losses occurring
                 to DuPont as a result, directly or indirectly, of the
                 commingling of Ethane and Ethane-Propane Mix.

         H.      Sampling.  Conoco shall have the right to sample all Product
                 to be delivered for storage and may refuse to accept delivery
                 of any Product if, in Conoco's opinion, the Product does not
                 meet the required specifications or satisfactory control of
                 Product specifications will not be maintained during delivery.
                 At Conoco's request DuPont shall provide Conoco access to the
                 Product to be delivered for the purpose of sampling and
                 provide Conoco representative samples of such Product.

         I.      Specifications.  All Product delivered by DuPont into storage
                 or by Conoco from storage must meet the respective
                 specifications set out in Appendix A.  Conoco reserves the
                 right to modify, add to, or revise such specifications at any
                 time and from time-to-time upon giving not less than thirty
                 (30) days prior written notice; provided, however, that any
                 such specification revisions shall apply to all Storage
                 Customers for the Product.

         J.      Nominations, Scheduling.  Product movements must be nominated
                 by DuPont and accepted by Conoco on or before the fifth
                 working day before the end of the month for Product movements
                 during the succeeding month.  Changes made after that time
                 will be accommodated on a best efforts basis by Conoco and may
                 incur additional throughput fees.

         K.      Metrics.  The Parties agree to, from time to time, mutually
                 develop metrics for monitoring each other's performance under
                 this Agreement and particularly to aid in the early
                 identification and correction of problems that may arise
                 during the term of the Agreement.





Ethane Storage and Throughput Agreement                                   Page 6
<PAGE>   22
Article V.       MEASUREMENT AND TESTING

         A.      Measurement and Testing.  Measurement and testing of Product
                 into and out of the Storage Facility shall be made in
                 accordance with the procedures set forth in Appendix B.

         B.      Loss Allowance.  Conoco guarantees to return to DuPont at the
                 Delivery Point, on a Barrel-for-Barrel basis, all throughput
                 volumes received at the Receipt Point less a "Loss Allowance".
                 At the outset of this Agreement, the Loss Allowance shall be
                 seventy-one thousandths of one percent (0.071%).  Beginning
                 January 1, 1999, Loss Allowance shall be adjusted in
                 accordance with Article VIII.  All other volume losses shall
                 be governed by Article V.D.

         C.      Limitation on Product Loss.  Notwithstanding the return
                 guarantee set out in Article V.B above, Conoco shall be
                 responsible for the loss of or damage to such Product only
                 when, and to the extent that such loss or damage is caused by
                 the negligence of Conoco, its employees and agents.  Any loss
                 of Product from Conoco's Storage Facility for which Conoco is
                 not responsible shall be apportioned among all of the Storage
                 Customers storing Product in such Storage Wells on the date of
                 loss in proportion to the amount of Product each Storage
                 Customer (including Conoco) has in storage on such date.

         D.      Risk of Loss.  DuPont's Product is not insured by Conoco
                 against loss or injury however caused, and any insurance
                 thereon must be provided and paid for by DuPont. Conoco's
                 liability, if any, for damages to the stored Product shall be
                 limited to a value equal to the Mont Belvieu OPIS Average
                 Price at the time of the loss, or at DuPont's option,
                 replacement of such lost or damaged Product in kind.

         E.      Monthly Inventory Reports.  Conoco shall submit to DuPont
                 monthly stock reports supported with appropriate receiving and
                 shipping information showing movements of Product into and out
                 of Conoco's Storage Facility and the amount of Product
                 remaining in storage at the end of the month.

Article VI.      TITLE

                 Title to DuPont's Product shall remain at all times with
                 DuPont and shall not transfer to Conoco; provided, however,
                 DuPont shall remain liable to Conoco for all fees, costs, and
                 all other liabilities as set forth in this Agreement,
                 regardless of whether DuPont, DuPont's customer or DuPont's
                 sublessee has title to the Product.





Ethane Storage and Throughput Agreement                                   Page 7
<PAGE>   23
Article VII.     CONSIDERATION AND PAYMENT

         A.      Reservation Fee.  DuPont agrees to pay Conoco a Reservation
                 Fee for the Reserved Volume.  The entire Reservation Fee for
                 each Contract Year shall be paid in full regardless of whether
                 or not DuPont actually uses the amount of storage space
                 reserved.  The Reservation Fee is due and payable in advance,
                 for each month or part thereof, on or before the first of each
                 such month in equal monthly installments throughout each
                 Contract Year of this Agreement.  No refund will be provided
                 for any partial month should this Agreement be terminated at a
                 time other than the end of a month.  At the outset of this
                 Agreement, the annual Reservation Fee shall be seventy-four
                 and one-half cents ($0.745) per year per Barrel of Reserved
                 Volume.  The first three monthly installments shall be one
                 hundred, forty-nine thousand dollars ($149,000); the first of
                 which shall be due and payable on or before the Effective Date
                 and the next two shall be due and payable on or before the
                 first day of each of succeeding month.  Beginning January 1,
                 1999, the monthly Reservation Fee shall be an amount
                 determined pursuant to Article VIII.  Further adjustments to
                 the monthly Reservation Fee may be made pursuant to Article
                 VIII.

         B.      One Free Turn.  By payment of the Reservation Fee as set forth
                 in Article VII.A, DuPont is entitled, in each Contract Year,
                 to deliver into storage a volume of Product up to the Reserved
                 Volume without incurring a Throughput Fee.

         C.      Throughput Fee.  DuPont agrees to pay Conoco a handling charge
                 ("Throughput Fee") for each Barrel of Excess Throughput.  At
                 the outset of this Agreement, the Throughput Fee shall be
                 fourteen and nine tenths cents ($0.149) per Barrel of Excess
                 Throughput.  Beginning January 1, 1999, the Throughput Fee
                 shall be an amount determined pursuant to Article VIII.

         D.      Excess Storage Fee.  DuPont is not permitted, at any time, to
                 have a Storage Volume in excess of the Reserved Volume without
                 the express written consent of Conoco.  In the event DuPont
                 has Storage Volume in excess of the Reserved Volume, in
                 addition to all other applicable fees, DuPont shall pay Conoco
                 an Excess Storage Fee of nine and one tenth cents ($0.091) per
                 Barrel for the total number of Barrels of Storage Volume in
                 excess of the relevant Reserved Volume for each month in which
                 there is an excess Storage Volume.  Any excess Storage Volume
                 acquired in this manner shall be understood to be temporary
                 only, and shall not constitute waiver of Conoco's right to
                 restrict storage to the Reserved Volume at any time
                 thereafter.  DuPont shall promptly remove any such excess
                 Storage Volume upon Conoco's request.





Ethane Storage and Throughput Agreement                                   Page 8
<PAGE>   24
         E.      Holdover Storage Fee.  The fee for storage of any Product
                 remaining in storage more than thirty (30) days past the last
                 day of the term of this Agreement shall be twelve cents ($.12)
                 per Barrel per month or any portion thereof, payable in
                 advance on the first day of each month in the same manner and
                 at the same place designated above for Reservation Fees.  Any
                 holdover storage shall be understood to be temporary only, and
                 shall not constitute waiver of Conoco's right to use or lease
                 storage space to others at any time after this Agreement is
                 terminated.  DuPont shall promptly remove any such holdover
                 volume upon Conoco's request.

         F.      Dryer Fee.  DuPont shall pay Conoco a Dryer Fee of one and
                 twenty six hundredths cents ($0.0126) per Barrel on all
                 Product dried by Conoco and delivered to DuPont.

         G.      Invoicing.  Conoco may issue invoices to DuPont periodically
                 for charges that have accrued.  DuPont agrees to remit payment
                 of all undisputed amounts due to Conoco via wire transfer
                 within thirty (30) days of the date of the invoice.

         H.      Records and Audit.  Conoco will maintain accurate accounts and
                 supporting documentation for all charges related to providing
                 the services under this Agreement and such other records as
                 may reasonably be required by DuPont in accordance with the
                 Generally Accepted Accounting Principles and Practices for a
                 period of at least five years.  DuPont may at its option and
                 expense, inspect and audit the accounts of Conoco for the most
                 recent two calendar years relating to any charges imposed by
                 Conoco under this Agreement.  Each audit must be conducted
                 during office hours and with at least forty-eight (48) hours
                 advance notice.  If DuPont shall require a second audit or
                 inspection in any single year, DuPont shall pay all of
                 Conoco's costs, as determined in Conoco's reasonable
                 discretion, plus any other costs associated with such second
                 audit or inspection.

Article VIII.    ADJUSTMENT OF FEES

         A.      During the fourth quarter of 1998, or as quickly thereafter as
                 can reasonably be accomplished, the Parties shall jointly
                 commission and pay for a study by a qualified third party to
                 determine the cost for the storage that Conoco is providing
                 under this Agreement for DuPont.  The Parties shall advise the
                 third party to find a reasonable number of reference storage
                 arrangements having a term of at least one year and
                 reservation and throughput volumes similar to the reservation
                 and throughput volume that DuPont has undertaken in this
                 Agreement.  For each reference storage arrangement, the third
                 party should obtain: the reserved volume; the annual
                 throughput, the





Ethane Storage and Throughput Agreement                                   Page 9
<PAGE>   25
                 reservation fees, the throughput fees, loss allowance and the
                 term and the vintage (when the arrangement was first
                 effective).

         B.      Conoco shall also provide, under terms of confidentiality with
                 the third party, corresponding data for all storage
                 arrangements having a term of at least one year where Conoco
                 is the storage provider and the storage customer.

         C.      The third party shall, without revealing the fees involved in
                 each storage arrangement, disclose to the Parties the reserved
                 volume, throughput volume, term and vintage of each storage
                 arrangement discovered (not including those arrangements in
                 which Conoco is the storage provider).  The Parties shall
                 then, by agreement, assign a weight to each storage
                 arrangement.  If the Parties cannot agree on the weighting of
                 the various arrangements, then the default weighting procedure
                 is to assign weights for each reference arrangements where
                 half of each such assigned weight is derived by dividing the
                 particular reservation volume by the sum of all reservation
                 volumes and the other half of each assigned weight is derived
                 by dividing the particular throughput volume by the sum of all
                 throughput volumes.

         D.      The third party shall thereafter compute Cost per Reserved
                 Barrel figures for each storage arrangement where no such
                 figures are to be disclosed to the Parties.  From these
                 various Cost per Reserved Barrel figures, the third party
                 shall then compute a Conoco provider weight averaged Cost per
                 Reserved Barrel and a market-based weight average Cost per
                 Reserved Barrel.  The Conoco provider Cost per Reserved Barrel
                 is computed using the default procedure of weighting as
                 described above for the arrangements where Conoco is the
                 storage provider.  The market-based Cost per Reserved Barrel
                 is computed based on the weight averaged (based on the Parties
                 agreed weighting or the default weighting if there is no
                 agreement on weighting) of all the remaining Cost per Reserved
                 Barrel figures.  See Appendix C for an example calculation of
                 the Cost per Reserved Barrel using the interim fees.

         E.      The third party shall then determine which is the lowest Cost
                 per Reserved Barrel between the Conoco provider and
                 market-based Cost per Reserved Barrel amounts.  Only the
                 lowest of the two amounts shall be revealed to the Parties and
                 it shall not be revealed whether the amount given is the
                 Conoco provider Cost per Reserved Barrel amount or the
                 market-based Cost per Reserved Barrel amount.

         F.      Once the Cost per Reserved Barrel is determined from the third
                 party, the Parties shall revise the Reservation Fee,
                 Throughput Fee and Loss





Ethane Storage and Throughput Agreement                                  Page 10
<PAGE>   26
                 Allowance to provide DuPont with comparable cost and Conoco
                 with comparable revenue per Barrel of Reserved Volume.  After
                 adjustment, the new Loss Allowance should be based on the
                 ratio of the new Cost per Reserved Barrel to the old Cost per
                 Reserved Barrel.  Also, the new Reservation Fee should remain
                 about five times the new Throughput Fee and preferably be
                 fairly round numbers.  See Appendix D for example calculations
                 of new Reservation Fees, Throughput Fees and Loss Allowance
                 for various scenarios of new Cost per Reserved Barrel amounts
                 as might be generated by the study.

         G.      The new fees shall be effective upon January 1, 1999 and shall
                 extend until revised by a subsequent study as described above.
                 Subsequent studies may be conducted every three years
                 immediately preceding the anniversary of the Effective Date.
                 Thus, the next study may be conducted prior to the month and
                 day of the Effective Date in the year 2001 such that the
                 results therefrom may be effective on such date.  However, for
                 studies after 1999, the fees shall not be adjusted unless the
                 study reveals that the lower of the Conoco provider and
                 market-based Cost per Reserved Barrel amounts deviate from the
                 then current Cost per Reserved Barrel by more than ten percent
                 (10%).  Subsequent changes in fees, except in the case of a
                 meet or release demand in Article IX, shall be instituted at
                 the beginning of a Contract Year.

Article IX.      MEET OR RELEASE

         A.      DuPont shall have the right during the term of this Agreement
                 to obtain a bonafide offer from a storage provider to provide
                 storage services for the entire Reserved Volume and present
                 such bonafide offer to Conoco for Conoco to either meet the
                 terms of the bonafide offer or elect to terminate the further
                 obligations of both Parties under this Agreement.

         B.      Upon the presentment of a meet or release demand, Conoco shall
                 be required to respond within thirty (30) days electing one of
                 two options:  (1) Conoco may elect to accept all fees,
                 charges, terms and conditions of the bonafide offer and
                 continue to provide services under this Agreement as modified
                 by all provisions of the bonafide offer; or (2) elect to
                 terminate its obligations to provide services under this
                 Agreement.

         C.      Any such release shall not be effective until one year from
                 the date of Conoco's response.  In addition, as there are
                 other services, in addition to those set forth in this
                 Agreement being provided by Conoco to DuPont, specifically
                 pipeline operation services for DuPont owned pipelines for
                 transporting products to and from DuPont's Sabine River Works
                 Facility, it should be noted that Conoco's election to
                 terminate the obligations of the





Ethane Storage and Throughput Agreement                                  Page 11
<PAGE>   27
                 Parties under this Agreement may trigger the right to
                 terminate services provided under such separate agreements.

Article X.       LIABILITIES, INDEMNITIES, CLAIMS

         A.      Express Negligence Disclosure.  UNLESS THIS AGREEMENT
                 EXPRESSLY PROVIDES TO THE CONTRARY, THE INDEMNITY, RELEASE AND
                 WAIVER PROVISIONS SET FORTH IN THIS AGREEMENT APPLY REGARDLESS
                 OF WHETHER THE INDEMNIFIED PARTY (OR ITS EMPLOYEES, AGENTS,
                 CONTRACTORS, SUCCESSORS OR ASSIGNS) CAUSES, IN WHOLE OR IN
                 PART, INDEMNIFIED CLAIMS ARISING OUT OF OR RESULTING, IN WHOLE
                 OR IN PART, FROM, OUT OF, OR IN CONNECTION WITH, THE STORAGE
                 OR HANDLING OF DUPONT'S PRODUCT OR THE OPERATIONS OF CONOCO'S
                 STORAGE FACILITY OR THE INDEMNIFIED PARTY'S (OR ITS
                 REPRESENTATIVES', CONTRACTORS', SUCCESSORS', OR ASSIGNS')
                 SOLE, JOINT, COMPARATIVE OR CONCURRENT NEGLIGENCE, STRICT
                 LIABILITY OR FAULT.  DUPONT AND CONOCO ACKNOWLEDGE THAT THIS
                 STATEMENT COMPLIES WITH THE EXPRESS NEGLIGENCE RULE AND IS
                 CONSPICUOUS.

         B.      Conoco shall indemnify and hold DuPont harmless from any loss
                 or liability (including legal fees and expenses) arising from
                 any claim or cause of action for injury to or death of any
                 Conoco employee.

         C.      DuPont shall indemnify and hold Conoco harmless from any loss
                 or liability (including legal fees and expenses) arising from
                 any claim or cause of action for injury to or death of any
                 DuPont employee.

         D.      Conoco shall, to the extent permitted by law, fully indemnify,
                 defend and hold harmless, DuPont, with respect to any and all
                 claims, losses, damages, fines, debts, cost, expenses, and
                 penalties, liabilities, causes of action, including without
                 limitation, settlement costs and any reasonable legal or other
                 expenses paid to a third party for investigating or defending
                 any actions or threatened actions, (herein collectively
                 referred to as "Losses"), to the extent such Losses are
                 incurred by DuPont arising out of or as a result of any
                 negligence, willful misconduct, breach of contract or
                 violations of law or regulation by Conoco, its employees,
                 agents, subcontractors or assigns in the performance of
                 services provided pursuant to this Agreement.  The Losses
                 covered under this paragraph, unless provided for in
                 paragraphs B and C above, include, without limitation, Losses
                 from actual or alleged (1) injury to or death of any person,
                 including agents, subcontractors and





Ethane Storage and Throughput Agreement                                  Page 12
<PAGE>   28
                 assigns of DuPont, (2) loss of or damage to property
                 including, without limitation, property of DuPont and (3)
                 damage to the environment.

         E.      DuPont shall, to the extent permitted by law, fully indemnify,
                 defend and hold harmless, Conoco, with respect to any and all
                 claims, losses, damages, fines, debts, cost, expenses, and
                 penalties, liabilities, causes of action, including without
                 limitation, settlement costs and any reasonable legal or other
                 expenses paid to a third party for investigating or defending
                 any actions or threatened actions, (herein collectively
                 referred to as "Losses"), to the extent such Losses are
                 incurred by Conoco arising out of or a result of any
                 negligence, willful misconduct, breach of contract or
                 violations of law or regulation by DuPont, its employees,
                 agents, subcontractors or assigns in the performance of
                 services provided pursuant to this Agreement.  The Losses
                 covered under this paragraph, unless provided for in
                 paragraphs B and C above, include, without limitation, Losses
                 from actual or alleged (1) injury to or death of any person,
                 including agents, subcontractors and assigns of Conoco, (2)
                 loss of or damage to property including, without limitation,
                 property of Conoco and (3) damage to the environment.

         F.      Joint Responsibility.  In circumstances that both Parties are
                 in some measure responsible for Losses as described in
                 Paragraphs D and E above, the Parties shall indemnify the
                 other to the extent of its proportional share of its
                 responsibility of such Losses.

         G.      Waiver of Consequential and Punitive Damages.  NOTWITHSTANDING
                 ANYTHING TO THE CONTRARY CONTAINED IN THIS AGREEMENT OR AT LAW
                 OR IN EQUITY, IN NO EVENT SHALL CONOCO BE LIABLE FOR PUNITIVE,
                 SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES (INCLUDING WITHOUT
                 LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS, BUSINESS
                 INTERRUPTION OR ANY OTHER LOSS) ARISING FROM OR RELATING TO
                 ANY CLAIM MADE UNDER THIS AGREEMENT OR REGARDING THE PROVISION
                 OF OR THE FAILURE TO PROVIDE THE STORAGE AND THROUGHPUT
                 SERVICES HEREUNDER, EVEN IF CONOCO HAS BEEN ADVISED OF THE
                 POSSIBILITY OF SUCH DAMAGES.

         H.      Exclusive Remedy.  The terms and provisions of this Article X
                 shall be the sole and exclusive remedy of each of the Parties
                 indemnified hereunder with respect to the transactions
                 contemplated in this Agreement.

         I.      Notice of Claims.  Notice of claims for loss, damage, or
                 indemnity in connection with the services provided under this
                 Agreement must be made to Conoco in writing within ninety (90)
                 days after the same having become





Ethane Storage and Throughput Agreement                                  Page 13
<PAGE>   29
                 known to DuPont or should have become known to DuPont.  Such
                 claims must be set forth in specific detail and must be
                 delivered to Conoco within the ninety (90) day period and,
                 unless so made and delivered to Conoco, Conoco shall be wholly
                 released and discharged therefrom and shall not be liable
                 therefore in any manner whatsoever.  Conoco shall use best
                 efforts to respond timely to any DuPont claim.  No suit at law
                 or in equity shall be maintained upon any claim unless such
                 claim is brought within two (2) years of Conoco's refusal to
                 accept such claim.

Article XI.      FORCE MAJEURE

         A.      Force Majeure.  Neither Party shall be liable to the other for
                 failure or delay in performance under this Agreement to the
                 extent that the failure or delay is due directly or indirectly
                 to Force Majeure, which is herein defined to include without
                 limitation, Acts of God or other causes beyond the reasonable
                 control of the Parties, war (whether declared or not), fire,
                 flood, lightning, hurricane or other storm, earthquake,
                 geological failure, acts of public enemy, explosion,
                 scheduling, operational and maintenance restrictions,
                 rebellion, riot, insurrections, sabotage, invasion, accident,
                 epidemic, strikes, lockouts or other labor difficulties or
                 industrial disturbances, compliance with acts, rules,
                 regulations, or orders of federal, state, or local government,
                 any agency thereof or any other authority having or purporting
                 to have jurisdiction, mechanical failures or similar causes
                 not due to either Party's fault or negligence, official order
                 or industry-wide request, any inability to secure necessary
                 parts or materials, including the inability to secure
                 materials by reason of allocations promulgated by authorized
                 governmental agencies, or any other contingency beyond the
                 control of the affected Party which interferes with the
                 performance hereunder.

         B.      Suspension of Performance.  Performance under this Agreement
                 shall be suspended (except for the payment of money due or to
                 become due for past performance hereunder) during the period
                 of such Force Majeure to the extent made necessary by the
                 Force Majeure; provided, the settlement of strikes, lockouts,
                 industrial disputes, or disturbances shall be entirely within
                 the discretion of the Party so settling to accede to the
                 demands of the demands of any opposing party when such course
                 is inadvisable in the discretion of the Party having the
                 difficulty.

         C.      No Effect on Term.  No curtailment, suspension, or acceptance
                 of performance pursuant to this Article XI shall operate to
                 extend the term of, or to terminate, this Agreement.
                 Performance under this Agreement shall resume to the extent
                 made possible by the end or amelioration of the Force Majeure
                 event.





Ethane Storage and Throughput Agreement                                  Page 14
<PAGE>   30
         D.      Notice.  A Party claiming Force Majeure shall notify the other
                 Party immediately by telephone, E-mail, and/or fax and confirm
                 the same in writing, giving reasonable detail regarding the
                 type of Force Majeure and its estimated duration.

Article XII.     MISCELLANEOUS PROVISIONS

         A.      Taxes.  DuPont shall pay any and all lawful taxes,
                 assessments, or charges levied or assessed against DuPont's
                 Product or other assets including, but not limited to, any
                 gross receipts tax, use tax, sales tax and ad valorem tax.
                 DuPont shall immediately reimburse Conoco for any such taxes,
                 assessments or charges paid by Conoco on behalf of DuPont upon
                 receipt of notice of payment. Conoco shall pay all its
                 income-related taxes and all employee-related taxes and
                 charges such as withholdings, FICA, FICM, unemployment and
                 other similar taxes.

         B.      Notice.  All notices, demands, request and other
                 communications necessary to be given hereunder shall be in
                 writing and deemed given if personally delivered, forwarded by
                 facsimile transmission (with proof of transmission
                 capability), or mailed by either certified mail, return
                 receipt requested, or sent by recognized overnight carrier to
                 the respective Party at its address below:

                      If to Conoco:
                      
                            Conoco Inc.
                            P.O. Box 2197
                            Houston, Texas 77252-2197
                            
                            Attn: Director, Fractionation Services and Logistics
                            Telephone: (281) 293-1198
                            Facsimile: (281) 293-5990
                            
                      If to DuPont and related to:
                      
                            Pricing and contract issues:
                      
                                  DuPont Sourcing
                                  P.O. Box 80022
                                  Wilmington, DE  19880-0022
                                  
                                  Attn:  Sourcing Manager
                                  Telephone: (302) 992-6085
                                  Facsimile: (302) 992-3966
                      




Ethane Storage and Throughput Agreement                                  Page 15
<PAGE>   31
                            Legal issues:

                                  DuPont Legal
                                  1007 Market Street
                                  Wilmington, DE  19898
                                  
                                  Attn: Logistics and Commerce Counsel
                                  Telephone: (302) 774-1539
                                  Facsimile: (302) 774-4812
                                  
                            Operations, Day to Day issues

                                  DuPont Packaging and Industrial Polymers
                                  1007 Market Street
                                  Wilmington, DE  19898
                                  
                                  Attn:  Manager, Contract Manufacturing
                                  Telephone: (302) 774-6105
                                  Facsimile: (302) 774-2005

         C.      Assignment.  Neither Party shall assign any portion of its
                 rights or obligations under this Agreement without the prior
                 written consent of the other, which consent shall not be
                 unreasonably withheld; provided however, either Party may
                 assign this Agreement to a parent corporation, or any
                 subsidiary or affiliate with respect to which it holds at
                 least fifty-one percent (51%) of the voting stock, without the
                 consent of the other Party; provided further, the original
                 Parties to this Agreement shall remain primarily obligated
                 hereunder.  This Agreement shall be binding upon and inure to
                 the benefit of the Parties hereto, their successors and
                 assigns and nothing contained in this Agreement, express or
                 implied, is intended to confer upon any other person or entity
                 any benefits, rights, or remedies.  Notwithstanding the
                 foregoing, DuPont shall have the right to freely assign its
                 entire interest in this Agreement to a third party pursuant to
                 such third party acquiring DuPont assets that are served by
                 Conoco under this Agreement.

         D.      Rules and Regulations.  This Agreement and the provisions
                 hereof shall be subject to, and the Parties agree to comply
                 with, all applicable local, state, and federal laws and to all
                 applicable rules, regulations, orders and directives of any
                 governmental authority, agency, commission, or regulatory body
                 in connection with any and all matters or things under or
                 incident to this Agreement.  The Parties warrant to one
                 another that they comply with all applicable laws, rules,
                 orders, and regulations of governmental authority covering the
                 production, sale and delivery of the goods or services
                 specified herein, including, but not limited to, the Equal





Ethane Storage and Throughput Agreement                                  Page 16
<PAGE>   32
                 Opportunity Clause prescribed in 41 CFR 60-1.4; the
                 Affirmative Action Clause prescribed in 41 CFR 60-250.4,
                 regarding disabled veterans and veterans of the Vietnam Era;
                 the Affirmative Action Clause for Handicapped Workers
                 prescribed in 41 CFR 60-741.4; 48 CFR Chapter 1 Subpart 19.7
                 regarding Small Business and Small Disadvantaged Business
                 Concerns; 48 CFR Chapter 1 Subpart 20.3 regarding Utilization
                 of Labor Surplus Area Concerns; Executive Order 12138 and
                 regulations thereunder regarding subcontracts to women-owned
                 business concerns; Affirmative Action Compliance Program (41
                 CFR 60-1.40); annually file SF-100 Employer Information Report
                 (41 CFR 60-1.7); 41 CFR 60-1.8 prohibiting segregated
                 facilities; and the Fair Labor Standards Act of 1938, as
                 amended.

         E.      Governing Law, Waiver of Jury Trial and Consent to
                 Jurisdiction.  THIS AGREEMENT SHALL BE GOVERNED, CONSTRUED,
                 AND ENFORCED IN ACCORDANCE WITH THE LAWS OF THE STATE OF
                 DELAWARE IRRESPECTIVE OF THE RESIDENCE, PLACE OF BUSINESS, OR
                 DOMICILE OF THE PARTIES HERETO OR PLACE OF EXECUTION BY ANY
                 PARTY HERETO, AND NOTWITHSTANDING ANY CONFLICT OF LAWS OR
                 PROVISIONS TO THE CONTRARY.  THIS AGREEMENT SHALL NOT BE
                 GOVERNED BY THE U. N. CONVENTION ON CONTRACTS FOR THE
                 INTERNATIONAL SALE OF GOODS.  IN ADDITION, EACH PARTY HEREBY
                 (a) WAIVES ANY AND ALL RIGHTS IT MAY HAVE TO A JURY TRIAL IN
                 CONNECTION WITH ANY MATTER OR RIGHT ARISING UNDER THIS
                 AGREEMENT OR RELATING TO THE TRANSITIONAL SERVICES, (b)
                 CONSENTS TO THE EXCLUSIVE JURISDICTION OF ANY STATE OR FEDERAL
                 COURT WITHIN THE STATE OF DELAWARE AND IRREVOCABLY AGREES THAT
                 ALL ACTIONS OR PROCEEDINGS ARISING UNDER OR RELATING TO THIS
                 AGREEMENT OR THE TRANSITIONAL SERVICES SHALL BE LITIGATED IN
                 ANY SUCH COURT, AND (c) WAIVES ANY OBJECTION WHICH IT MAY HAVE
                 BASED UPON IMPROPER VENUE OR FORUM NON CONVENIENS TO THE
                 CONDUCT OF ANY PROCEEDINGS IN ANY SUCH COURT.

         F.      Alternative Dispute Resolution.

                 1.       Both Parties understand and appreciate that their
                          long term mutual interests will be best served by
                          affecting a rapid and fair resolution of any claims
                          or disputes which may arise out of this Agreement.
                          Therefore, both Parties agree to use their best
                          efforts to resolve all such disputes as rapidly as
                          possible on a fair and equitable basis.





Ethane Storage and Throughput Agreement                                  Page 17
<PAGE>   33
                          Toward this end both Parties agree to develop and
                          follow a process for presenting, rapidly assessing,
                          and settling claims and other disputes on a fair and
                          equitable basis.

                 2.       If any dispute or claim arising under this Agreement
                          cannot be readily resolved by the Parties pursuant to
                          Paragraph F.1 above, the Parties agree to refer the
                          matter to a panel consisting of one (1) senior
                          executive from each Party for review and resolution.
                          The senior executive shall not have been directly
                          involved in the claim or dispute.  A copy of the
                          Agreement, relevant facts, areas of disagreement, and
                          concise summary of the basis for each side's
                          contentions will be provided to both executives who
                          shall review the same, confer, and attempt to reach a
                          mutual resolution of the issue.  The senior
                          executives shall attempt to meet and resolve the
                          dispute within thirty (30) days of their appointment.

                 3.       If the dispute cannot be resolved, under the process
                          set forth in Paragraph F.2 above, within ten (10)
                          days from the date of the panel's conference, the
                          Parties agree to attempt to resolve the dispute or
                          claim through non-binding mediation.  The Parties
                          shall select a single qualified Mediator,
                          knowledgeable in the pertinent industry, who is not
                          presently affiliated with or related to either Party.
                          The Mediator shall hold a hearing (not to exceed one
                          (1) day) as soon as practicable after his appointment
                          (but not later than thirty (30) days after his
                          appointment) during which each Party shall present
                          its version of the matter, supported, if desired, by
                          a brief statement of the issue(s), sworn, written
                          testimony, relevant documents, its assessment of
                          damages, and its argument.  The Parties shall provide
                          the Mediator with copies of all such materials as
                          well as any documents provided to their senior
                          executives under Paragraph F.2 at least ten (10) days
                          prior to the scheduled date of the mediation hearing.
                          The Parties may also provide the Mediator with copies
                          of any laws or regulations which they feel are
                          relevant to the dispute.  A copy of the Contract will
                          be provided to the Mediator.  Formal written
                          arguments, legal memoranda, and live testimony are
                          discouraged but may be permitted at the discretion of
                          the Mediator.  Both Parties agree to make any
                          relevant and involved employees or documents
                          available to the other Party for its review and use
                          in preparing its position under this clause without
                          the need for subpoena or other court order.

                 4.       The Mediator, within ten (10) days of the completion
                          of the hearing, will meet separately with both
                          Parties and provide each of them, on a





Ethane Storage and Throughput Agreement                                  Page 18
<PAGE>   34
                          confidential basis, with his/her written views of the
                          strengths and weaknesses of their respective
                          positions.  The Parties will then reconvene and, with
                          the assistance of the Mediator, attempt to resolve
                          the matter.  If resolution cannot be achieved by the
                          Parties within forty-eight (48) hours of this second
                          meeting, the Mediator will, within ten (10)
                          additional days, issue a written, non-binding
                          decision on the issue.

                 5.       Each Party shall, within five (5) days of the
                          Mediator's written decision, notify the other in
                          writing whether it will accept or reject that
                          decision.  If the matter has not been resolved
                          utilizing the processes set forth in this clause and
                          the Parties are unwilling to accept the non-binding
                          decision of the Mediator, either or both Parties may
                          elect to pursue resolution through litigation.

                 6.       The selected Mediator shall execute a confidentiality
                          agreement, satisfactory to all Parties, prior to
                          his/her active participation in the mediation.  The
                          costs of the Mediator shall be shared equally by the
                          Parties.  Each Party will bear its own costs of
                          mediation.

                 7.       If the Parties cannot agree upon a choice of a
                          Mediator within ten (10) days of the date of the
                          panel's conference pursuant to Paragraph F.2, either
                          or both Parties may elect to directly pursue
                          litigation.

                 8.       All statements, correspondence, memoranda, briefs,
                          decisions, testimony, communications, and materials,
                          whether written or oral, submitted to or generated by
                          the panel and/or Mediator in connection with the
                          processes set forth above shall be deemed to be in
                          furtherance of settlement negotiations and shall be
                          privileged and shielded from production and
                          disclosure in any subsequent litigation.
                          Notwithstanding the foregoing, documents prepared in
                          the normal course of business, such as invoices,
                          shall be subject to discovery in subsequent
                          litigation in accordance with applicable law.

         G.      Hazards.  EACH PARTY ACKNOWLEDGES THAT THERE ARE HAZARDS
                 ASSOCIATED WITH THE STORAGE AND USE OF PRODUCT, THAT IT
                 UNDERSTANDS SUCH HAZARDS, AND THAT IT IS ITS OWN
                 RESPONSIBILITY TO WARN AND PROTECT ITS EMPLOYEES AND OTHERS
                 WHO MAY BE EXPOSED TO SUCH HAZARDS IN CONNECTION WITH ITS
                 RESPONSIBILITIES AND OBLIGATIONS CONCERNING THE STORAGE AND
                 USE OF THIS PRODUCT CONTEMPLATED BY THIS AGREEMENT.





Ethane Storage and Throughput Agreement                                  Page 19
<PAGE>   35
         H.      Headings.  Headings used in this Agreement are for convenience
                 of the Parties only, and shall not be taken into account in
                 construing or interpreting this Agreement.

         I.      Entire Agreement.  This Agreement contains the entire
                 Agreement and understanding of the Parties with respect to the
                 matters contained herein and there are no promises,
                 assurances, terms, conditions, or obligations, whether by
                 precedent or otherwise, other than those contained herein.
                 This Agreement cancels and supercedes any agreement covering
                 the storage and throughput of Product at Conoco's Mont Belvieu
                 Storage Facility or any other agreement incident thereto
                 previously executed by the Parties.

         J.      Amendment.  This Agreement shall not be amended or modified
                 except by written instrument executed by duly authorized
                 representatives of the respective Parties.

         K.      Counterparts.  This Agreement may be executed in counterparts,
                 each of which shall constitute on original and all of which
                 shall constitute one document.

         L.      Waivers.  No waiver of the provisions hereof shall be
                 effective unless in writing and signed by the Party to be
                 charged with such waiver.  No waiver shall be deemed a
                 continuing waiver or waiver in respect to any subsequent
                 breach or default, either of a similar or dissimilar nature,
                 unless expressly so stated in writing.

         M.      Confidentiality.  Neither Conoco nor DuPont shall disclose any
                 term or condition of this Agreement without the prior written
                 consent of the other Party, which consent will not be
                 unreasonably withheld.  In the event of the termination of
                 this Agreement, Conoco and DuPont shall, to the extent
                 permitted by law, keep confidential and not use any
                 confidential information obtained pursuant to this Agreement,
                 unless prior written consent is obtained or such information
                 is readily ascertainable from public or published information
                 or trade sources or is received by a Party from a third party
                 having no obligation of confidentiality with respect to such
                 information.

         N.      Default.  In the event either Party to this Agreement shall
                 default in the performance of any obligations specified, the
                 nondefaulting Party shall notify the other Party in writing,
                 and if such default is not remedied with reasonable
                 promptness, then the nondefaulting Party shall have the right
                 to terminate this Contract immediately.  Termination under
                 this Article, or under any other Article of this Contract,
                 shall not relieve or release either Party from any liability
                 which accrued prior to the date of such termination.





Ethane Storage and Throughput Agreement                                  Page 20
<PAGE>   36
         O.      CHEMTREC.  The Parties agree to use CHEMTREC to report any
                 chemical emergency relating to any Product under this
                 Agreement.

         P.      Safety.  The Parties are vitally interested in safety and in
                 the safe practices of all activities covered under this
                 Agreement.  Thus, Parties agree to maintain mutually agreeable
                 safety standards for activities covered under this Agreement
                 which are no less stringent than safety standards which are in
                 effect at the Effective Date.  In addition to endeavoring to
                 maintain high safety standards, the Parties agree that its
                 employees, contractors, subcontractors and agents shall
                 respect and abide by the other Party's plant and site safety
                 rules when the one Party has personnel on the other Party's
                 plant or site.

         Q.      Independent Contractor.  It is understood that employees,
                 methods, facilities, and equipment of Conoco shall at all
                 times be under its exclusive direction and control.  Conoco's
                 relationship to DuPont shall be that of an independent
                 contractor.  Nothing in the Contract shall be construed to
                 constitute Conoco, or any of its employees, as an agent,
                 associate, joint venturer, or partner of DuPont.  However,
                 DuPont may from time to time appoint, in writing, Conoco to
                 act as an agent for limited purposes.

         R.      Minority Vendors.  The Parties agree to provide maximum
                 practicable utilization of Minority subcontractors and vendors
                 among its sources of supply in the performance of this
                 Contract.  Minorities include but are not limited to Black
                 Americans, Hispanic Americans, Native Americans, Asian Pacific
                 Americans, and Native Hawaiian Organizations.  A Minority
                 business is at least fifty-one percent (51%) owned by a
                 Minority or group of Minorities and has its management and
                 daily business controlled by one (1) or more such individuals.
                 Conoco shall report to DuPont on a quarterly basis the dollar
                 amounts paid by Conoco during the previous quarter to minority
                 subcontractors and vendors for goods and services used in the
                 performance of this Agreement.

         S.      Year 2000 Compliance.

                 1.       Each Party covenants and agrees that it will not
                          permit a Year 2000 Problem to computer systems,
                          software or equipment owned, leased or licensed by
                          it, its affiliates or subsidiaries to interfere with
                          its performance under this Agreement.  Each Party
                          further agrees to request from those of its suppliers
                          whose performance may materially affect that Party's
                          performance hereunder, that each such supplier
                          undertake the same obligation with respect to such
                          material performance.  The Parties will use
                          reasonable commercial efforts to cooperate and share
                          information to further comply with this Article,





Ethane Storage and Throughput Agreement                                  Page 21
<PAGE>   37
                          and to minimize the impact of Year 2000 Problems on
                          performance of this Agreement.  Each Party will
                          inform the other Party of any circumstance indicating
                          a possible obstacle to such compliance, and the steps
                          being taken to avoid or overcome the obstacle.

                 2.       Provided a Party complies with Paragraph S.1 above,
                          such Party will not be liable to the other Party
                          hereto for any failure to perform obligations under
                          this Agreement to the extent such failure to perform
                          arises from a Year 2000 Problem a) affecting one  of
                          the non-performing Party's suppliers or b) beyond
                          that Party's reasonable control (e.g. a Year 2000
                          Problem affecting a governmental entity).  IN
                          PARTICULAR SUCH NON-PERFORMING PARTY SHALL HAVE NO
                          LIABILITY FOR ANY DAMAGES, INCLUDING DIRECT,
                          INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL,
                          PUNITIVE OR EXEMPLARY DAMAGES.

                 3.       A "Year 2000 Problem" means a date handling problem
                          relating to the Year 2000 date change that would
                          cause a computer system, software or equipment to
                          fail to correctly perform, process and handle date
                          related data for the dates within and between the
                          twentieth and twenty-first centuries and all other
                          centuries.

         T.      Continuous Improvement.  The Parties will meet from time to
                 time, preferably at least once per year, to consider potential
                 operating cost saving measures that may be employed in the
                 performance of services rendered under this Agreement.  The
                 Parties agree that, to the extent that operating cost savings
                 are achieved, each Party will share with the other, on a 50/50
                 basis, the benefits of any cost savings realized for the
                 remainder of the term.

         U.      Controlled Substance Abuse.  The Parties agree that the use,
                 possession, manufacture, dispensing, sale and distribution of
                 alcohol, drugs, and other controlled substances on their
                 respective premises and on or in vehicles and equipment used
                 for the purposes of this Agreement shall be prohibited.  In
                 addition, the Parties shall prohibit from their property the
                 presence of any individual having a controlled substance in
                 his/her body for non-medical reasons.  The Parties shall
                 develop a mutually agreeable Controlled Substance Abuse
                 policy, including drug testing, which is at least as rigorous
                 as Conoco's current policy and complies with DOT's policy
                 relating to pipeline operations.





Ethane Storage and Throughput Agreement                                  Page 22
<PAGE>   38
IN WITNESS WHEREOF, the Parties hereto have caused this Agreement to be
executed on the day indicated.

                                  Conoco Inc.

                                  By:
                                      ----------------------------------------

                                  Title:
                                         -------------------------------------

                                  Date:
                                        --------------------------------------

                                     

                                  E. I. du Pont de Nemours and Company

                                  By:
                                      ----------------------------------------

                                  Title:
                                         -------------------------------------

                                  Date:
                                        --------------------------------------





Ethane Storage and Throughput Agreement                                  Page 23
<PAGE>   39
                                                                 EXHIBIT 10.18

                    ETHYLENE STORAGE AND THROUGHPUT AGREEMENT



This Ethylene Storage and Throughput Agreement ("Agreement") is effective as of
7:00 a.m. Mont Belvieu, Texas local time on the Effective Date by and between
Conoco Inc., a Delaware corporation with its principal place of business at 600
North Dairy Ashford Road, Houston, Texas 77079 ("Conoco") and E. I. du Pont de
Nemours and Company, a Delaware corporation, with its principal place of
business at 1007 Market Street, Wilmington, Delaware 19898 ("DuPont"). (Conoco
and DuPont are at times referred to herein individually as a "Party" and
collectively as "Parties").

                                   WITNESSETH

         WHEREAS, prior to the initial public offering of Conoco (as defined in
the Restructuring, Transfer and Separation Agreement), Conoco has heretofore
provided certain storage, throughput and operational services to DuPont at
Conoco's Mont Belvieu Storage Facility, located in Chambers County, Texas; and

         WHEREAS, DuPont desires to continue to lease underground storage space
from Conoco for the storage of ethylene and has requested that certain such
services continue pursuant to this Agreement; and

         WHEREAS, Conoco and DuPont do now desire to enter into this Agreement
which will, effective as of the Effective Date, provide for the storage and
throughput of DuPont's ethylene by Conoco; and

         NOW, THEREFORE, subject to and in consideration of the terms,
conditions and covenants contained in this Agreement, Conoco and DuPont agree as
follows:

Article I.        DEFINITIONS

         A.       "Barrel" means a volume of forty-two (42) U.S. standard
                  gallons.

         B.       "Reserved Volume" means the entire volume of the Ethylene
                  Storage Well currently about one million six hundred thousand
                  (1,600,000) Barrels of Product.

         C.       "Effective Date" means the date on which the Conoco initial
                  public offering closes.

         D.       "Contract Year" means a period of twelve consecutive months,
                  which shall commence on the Effective Date or on the
                  anniversary of the Effective Date each year.

         E.       "Day" means a period of twenty-four (24) consecutive hours
                  commencing at 7:00 a.m. local time and ending at 7:00 a.m. on
                  the following day.



Ethylene Storage and Throughput Agreement                                 Page 1
<PAGE>   40



         F.       "DuPont's Ethylene Pipeline" means the 8" DuPont owned
                  pipeline connecting Conoco's Storage Facility and DuPont's
                  Sabine River Works facility.

         G.       "Receipt Point(s)" means the following custody transfer
                  meters: Meter No. MU8001 that measures the volume of Product
                  from DuPont's Ethylene Pipeline to the Storage Facility; Meter
                  No. MU3004 that measures the volume of Product from Equistar's
                  Chocolate Bayou Facility to the Storage Facility; and Meter
                  No. MBL1FE0101 that measures the volume of Product from
                  Equistar's Storage Facility (formerly Lyondell) to the Storage
                  Facility.

         H.       "Delivery Point(s)" means the following custody transfer
                  meters: Meter No. MU8001 that measures the volume of Product
                  from the Storage Facility to DuPont's Ethylene Pipeline; and
                  Meter No. MU3007 that measures the volume of Product from the
                  Storage Facility to Equistar;

         I.       "Ethylene Storage Well" means that certain underground storage
                  cavern, No. W-3002, located at Conoco's Mont Belvieu Storage
                  Facility presently used for the storage of Ethylene.

         J.       "Mont Belvieu Storage Facility" or "Storage Facility" means
                  Conoco's owned and operated underground storage caverns and
                  related equipment located at Mont Belvieu, Chambers County,
                  Texas, situated on a 91.317 acre tract in the Henry Griffith
                  League Abstract No. A-12, Volume 353, Page 581, Deed Records
                  of Chambers County, Texas.

         K.       "Product" means Ethylene having the specifications set forth
                  in Appendix A.

         L.       "Ethylene" means a fluid consisting of primarily of ethylene
                  (C2H4) that is produced by DuPont at its Sabine River Works
                  facility and also by others and delivered to the Storage
                  Facility by DuPont's Ethylene Pipeline and from Equistar. The
                  specifications for Ethylene shall be determined by DuPont as
                  necessary.

         M.       "Storage Well(s)" or "Storage Cavern(s)" mean any one or more
                  of the storage wells at Conoco's Storage Facility.

         N.       "Direct Costs" means all expenses, including capital cost,
                  incurred by Conoco as a direct result of providing services
                  under this Agreement. Direct Costs are costs which are
                  necessary in the performance of Conoco's duties and are
                  specific to the Ethylene Well. Specific Direct Costs include,
                  but are not limited to, repair material, contract labor,
                  repair costs, insurance and utilities.

         O.       "Allocated Costs" means costs which are necessary in the
                  performance of Conoco's duties, but are not specific to any
                  certain asset. Allocated Costs 



Ethylene Storage and Throughput Agreement                                 Page 2
<PAGE>   41



                  include the wages, benefits, travel expenses, training, safety
                  equipment and other related employee expenses for
                  non-headquarters based employees that provide services to the
                  Ethylene Well. The determination of the proper allocation of
                  costs between the Storage Well and other assets, facilities
                  and pipelines shall be made solely by Conoco in good faith.

         P.       "Overhead" means an amount added to Conoco's invoices to
                  DuPont to cover Conoco's expenses for its Headquarters'
                  operating and engineering staffs as well as its supporting
                  Legal, Right-of-Way, Accounting, Risk Management, Tax,
                  Computer, and other administrative support groups as utilized
                  in normal day-to-day operations. Overhead shall be equal to
                  twenty-five percent (25%) of the Direct Costs and Allocated
                  Costs. Costs for engineering and other support personnel
                  assigned on a full-time basis to specific major projects will
                  be charged to those projects directly.

         Q.       "Storage Volume(s)" means the net current inventory of
                  DuPont's Product in the Storage Well. 


Article II.       TERM 

                  This Agreement shall be in full force and effect as of 7:00
                  a.m. Mont Belvieu, Texas local time on the Effective Date, and
                  shall continue in effect for a period of Thirty (30) Contract
                  Years, unless terminated earlier as provided elsewhere in this
                  Agreement. DuPont shall have the right to terminate this
                  Agreement without cause upon one year's written notification
                  to Conoco.

Article III.      VOLUME AND STORAGE CAPACITY

         A.       Storage Space. DuPont agrees to reserve and Conoco agrees to
                  lease to DuPont all available space in Conoco's Ethylene
                  Storage Well No. 3002 presently having a capacity of one
                  million six hundred thousand (1,600,000) Barrels of storage
                  space at Conoco's Mont Belvieu Storage Facility.

         B.       Excess Storage Volumes. Only upon the prior written consent of
                  Conoco, shall DuPont have in storage at the Storage Facility
                  at any one time, during the term of this Agreement, a volume
                  of Product in excess of 1,600,000 Barrels.

         C.       Sublease Permitted. DuPont shall be permitted to sublease any
                  or all of the storage space leased under this Agreement.

Article IV.       OPERATIONS AND THROUGHPUT CAPABILITY

         A.       Conoco's Storage Facility. Conoco operates at least two
                  additional Storage Wells in addition to the Ethylene Storage
                  Well and may add additional 



Ethylene Storage and Throughput Agreement                                 Page 3
<PAGE>   42


                  Storage Wells at the Storage Facility. The additional Storage
                  Wells are presently used to store products different than
                  Ethylene. All of the Storage Wells are connected to centrally
                  located pipeline header facilities operated by Conoco on its
                  property in the vicinity of the Storage Wells. All Products
                  delivered by DuPont into, or by Conoco out of, storage must be
                  delivered by pipeline to such header facilities, and all such
                  deliveries shall be deemed a delivery into or out of storage.
                  
         B.       Product Delivery and Receipts. It is DuPont's responsibility
                  to make all arrangements necessary to deliver and to receive
                  Product for storage by Conoco at Conoco's Storage Facility,
                  and to pay any charges imposed by any third party and paid by
                  Conoco for the collection, transfer, and injection of DuPont's
                  Product to such header facilities for delivery into storage
                  under this Agreement.

         C.       Daily Throughput Volumes. Subject to Conoco's Delivery,
                  Receipt and Allocation restrictions set forth in Article IV.D,
                  Conoco's Maximum Volume Capability set forth in Article IV.E,
                  Conoco's Limitation on Product Loss set forth in Article V.B;
                  and the Force Majeure restrictions set forth in X, Conoco
                  allocates to DuPont the following maximum Receipt Point and
                  Delivery Point volume rate capabilities:

                  1)       Maximum Receipt Point volume rate capabilities from
                           the Ethylene Pipeline into the Ethylene Storage Well:
                           thirty-five thousand (35,000) Barrels per day;

                  2)       Maximum Delivery Point volume capabilities from the
                           Ethylene Storage Well to the Ethylene Pipeline: forty
                           thousand (40,000) Barrels per day.

                  3)       In no event is this Article IV.C to be construed to
                           require Conoco to make any expenditure to increase
                           receipt or delivery rate capabilities. Conoco may
                           from time to time, but is not obligated to, provide
                           DuPont additional new or existing Delivery Point and
                           Receipt Point volume capability at any time that such
                           capability is available and such additional
                           capability is not required by other Storage Customers
                           as determined by Conoco.

         D.       Delivery and Receipt Restrictions; Allocation. The delivery
                  and receipt flow rates into and out of storage set forth in
                  Article IV.E are subject to Conoco's scheduling, operational
                  and maintenance restrictions, including without limitation
                  Storage Facility outages to conduct integrity tests of the
                  various Storage Wells. If Conoco's scheduling, operational or
                  maintenance restrictions will not permit all of parties
                  (including Conoco) storing any types of products in any of
                  Conoco's Storage Wells to deliver or receive the
 



Ethylene Storage and Throughput Agreement                                 Page 4
<PAGE>   43



                  volumes of Product requested, then Conoco shall allocate among
                  such parties Conoco's available flow rates in a fair and
                  equitable manner as determined by Conoco. Conoco shall give
                  DuPont timely notice of any scheduled maintenance work on
                  Conoco's Storage Facility which will interrupt acceptance or
                  redelivery of any Products hereunder and, if scheduling and
                  operational restrictions exist at the time DuPont schedules
                  movements of Product, then Conoco will verbally notify DuPont
                  of such restrictions. 

         E.       Maximum Volume Capability. In the event volumes are delivered
                  only from Conoco's Storage Facility, Conoco allocates to
                  DuPont a Delivery Point volume capability up to a maximum of
                  forty-five thousand (45,000) Barrels per Day of Product. The
                  Barrels per day represents DuPont's allocated share under this
                  Agreement, of the take-away capacity from Conoco's Storage
                  Facilities. Conoco may, but is not obligated to, provide
                  additional daily Delivery Point volume capability from its
                  Storage Facility at any time that such capability is not
                  required by other Storage Customers as determined by Conoco.


         F.       Removal of Product. DuPont must remove all Product from the
                  Storage Facility no later than thirty (30) Days from the last
                  Day of the Term of this Agreement, and such removal shall be
                  subject to the prior full payment of any accrued rental and
                  other charges, and to the other terms, provisions, and
                  conditions of this Agreement.
                 

         G.       Commingling. Conoco shall not commingle DuPont's Ethylene with
                  Ethylene belonging to others.

         H.       Sampling. Conoco shall have the right to sample all Product to
                  be delivered for storage and may refuse to accept delivery of
                  any Product if, in Conoco's opinion, the Product does not meet
                  the required specifications or satisfactory control of Product
                  specifications will not be maintained during delivery. At
                  Conoco's request DuPont shall provide Conoco access to the
                  Product to be delivered for the purpose of sampling and
                  provide Conoco representative samples of such Product. 

         I.       Specifications. All Product delivered by DuPont into storage
                  or by Conoco from storage must meet the respective
                  specifications set out in Appendix A attached hereto. DuPont
                  shall have the right to modify, add to, or revise such
                  specifications at any time and from time-to-time upon giving
                  not less than thirty (30) days prior written notice and with
                  Conoco's approval. Conoco's approval shall not be unreasonably
                  withheld.

         J.       Nominations, Scheduling. Product movements must be nominated
                  by DuPont and accepted by Conoco on or before the fifth
                  working day before 



Ethylene Storage and Throughput Agreement                                 Page 5
<PAGE>   44



                  the end of the month for Product movements during the
                  succeeding month. Changes made after that time will be
                  accommodated on a best efforts basis by Conoco.

         K.       Metrics. The Parties agree to, from time to time, mutually
                  develop metrics for monitoring each other's performance under
                  this Agreement and particularly to aid in the early
                  identification and correction of problems that may arise
                  during the term of the Agreement. 

Article V.        MEASUREMENT AND TESTING 

         A.       Measurement and Testing. Measurement and testing of Product
                  into and out of the Storage Facility shall be made in
                  accordance with the procedures set forth in Appendix B
                  attached to this Agreement.

         B.       Limitation on Product Loss. Conoco shall be responsible for
                  the loss of or damage to such Product only when, and to the
                  extent that such loss or damage is caused by the negligence of
                  Conoco, its employees and agents.

         C.       Risk of Loss. DuPont's Product is not insured by Conoco
                  against loss or injury however caused, and any insurance
                  thereon must be provided and paid for by DuPont. Conoco's
                  liability, if any, for damages to the stored Product shall be
                  limited to a value equal to a fair market value of Ethylene at
                  the time of the loss, or at Conoco's option, replacement of
                  such lost or damaged Product in kind. 

         D.       Monthly Inventory Reports. Conoco shall submit to DuPont
                  Monthly stock reports supported with appropriate receiving and
                  shipping information showing movements of Product into and out
                  of Conoco's Storage Facility and the amount of Product
                  remaining in storage at the end of the Month.

Article VI.       TITLE AND RISK OF LOSS 

                  Title to DuPont's Product and all risk of loss thereof shall
                  remain at all times in DuPont and shall not transfer to
                  Conoco; provided, however, DuPont shall remain liable to
                  Conoco for all fees, costs, and all other liabilities as set
                  forth in this Agreement, regardless of whether DuPont or
                  DuPont's customer has title to the Product.

Article VII.      CONSIDERATION AND PAYMENT 

                  DuPont agrees to pay Conoco's Direct and Allocable Costs plus
                  Overhead for the storage, handling, drying and other services
                  which Conoco provides during the term of this Agreement.
                  Conoco shall present a projection of anticipated costs for
                  each coming Contract Year prior to the anniversary of the
                  Effective Date. Conoco may issue invoices to DuPont
                  periodically for 




Ethylene Storage and Throughput Agreement                                 Page 6
<PAGE>   45


                  actual direct and allocable costs plus overhead. DuPont agrees
                  to remit payment to Conoco for all undisputed amounts via wire
                  transfer within thirty (30) days of the date of any invoice.
                 
                  Conoco will maintain accurate accounts and supporting
                  documentation, in accordance with the Generally Accepted
                  Accounting Principles and Practices, of all costs, expenses
                  and liabilities incurred in servicing, repairing, maintaining,
                  and administering the Ethylene Well for a period of at least
                  five years. DuPont may at its option and expense, inspect and
                  audit the accounts of Conoco for the most recent two calendar
                  years relating to any charges incurred by Conoco under this
                  Agreement. Each audit must be conducted during office hours
                  and with at least forty-eight (48) hours advance notice. If
                  DuPont shall require a second audit or inspection in any
                  single year, DuPont shall pay all of Conoco's costs, as
                  determined in Conoco's reasonable discretion, plus any other
                  costs associated with such second audit or inspection. 

                  DuPont is not permitted have a Storage Volume beyond the term
                  of this Agreement without the express written permission of
                  Conoco. In the event DuPont does holdover a Storage Volume at
                  the termination of this Agreement, DuPont shall pay Conoco a
                  holdover charge of Conoco's Direct and Allocable Costs plus
                  Overhead plus an additional holdover fee of ten percent (10%)
                  per month or any portion thereof. Any holdover Storage Volume
                  shall be understood to be temporary only, and shall not
                  constitute waiver of Conoco's right to use or lease storage
                  space to others at any time after this Agreement is
                  terminated. DuPont shall promptly remove any such holdover
                  Storage Volume upon Conoco's request. 

Article VIII.     MEET OR RELEASE 

         A.       DuPont shall have the right during the term of this Agreement
                  to obtain a bonafide offer from a storage provider to provide
                  storage services for the entire Reserved Volume and present
                  such bonafide offer to Conoco for Conoco to either meet the
                  terms of the bonafide offer or elect to terminate the further
                  obligations of both Parties under this Agreement.

         B.       Upon the presentment of a meet or release demand, Conoco shall
                  be required to respond within thirty (30) days electing one of
                  two options: (1) Conoco may elect to accept all fees, charges,
                  terms and conditions of the bonafide offer and continue to
                  provide services under this Agreement as modified by all
                  provisions of the bonafide offer; or (2) elect to terminate
                  its obligations to provide services under this Agreement.



Ethylene Storage and Throughput Agreement                                 Page 7
<PAGE>   46




         C.       Any such release shall not be effective until one year from
                  the date of Conoco's response. In addition, as there are other
                  services, in addition to those set forth in this Agreement
                  being provided by Conoco to DuPont, specifically pipeline
                  operation services for DuPont owned pipelines for transporting
                  products to and from DuPont's Sabine River Works Facility, it
                  should be noted that Conoco's election to terminate the
                  obligations of the Parties under this Agreement may trigger
                  Conoco's right to terminate services provided under such
                  separate agreements.

Article IX.       LIABILITIES, INDEMNITIES, CLAIMS 

         A.       Express Negligence Disclosure. UNLESS THIS AGREEMENT EXPRESSLY
                  PROVIDES TO THE CONTRARY, THE INDEMNITY, RELEASE AND WAIVER
                  PROVISIONS SET FORTH IN THIS AGREEMENT APPLY REGARDLESS OF
                  WHETHER THE INDEMNIFIED PARTY (OR ITS EMPLOYEES, AGENTS,
                  CONTRACTORS, SUCCESSORS OR ASSIGNS) CAUSES, IN WHOLE OR IN
                  PART, INDEMNIFIED CLAIMS ARISING OUT OF OR RESULTING, IN WHOLE
                  OR IN PART, FROM, OUT OF, OR IN CONNECTION WITH, THE STORAGE
                  OR HANDLING OF DUPONT'S PRODUCT OR THE OPERATIONS OF CONOCO'S
                  STORAGE FACILITY OR THE INDEMNIFIED PARTY'S (OR ITS
                  REPRESENTATIVES', CONTRACTORS', SUCCESSORS', OR ASSIGNS')
                  SOLE, JOINT, COMPARATIVE OR CONCURRENT NEGLIGENCE, STRICT
                  LIABILITY OR FAULT. DUPONT AND CONOCO ACKNOWLEDGE THAT THIS
                  STATEMENT COMPLIES WITH THE EXPRESS NEGLIGENCE RULE AND IS
                  CONSPICUOUS.

         B.       Conoco shall indemnify and hold DuPont harmless from any loss
                  or liability (including legal fees and expenses) arising from
                  any claim or cause of action for injury to or death of any
                  Conoco employee.

         C.       DuPont shall indemnify and hold Conoco harmless from any loss
                  or liability (including legal fees and expenses) arising from
                  any claim or cause of action for injury to or death of any
                  DuPont employee.

         D.       Conoco shall, to the extent permitted by law, fully indemnify,
                  defend and hold harmless, DuPont, with respect to any and all
                  claims, losses, damages, fines, debts, cost, expenses, and
                  penalties, liabilities, causes of action, including without
                  limitation, settlement costs and any reasonable legal or other
                  expenses paid to a third party for investigating or defending
                  any actions or threatened actions, (herein collectively
                  referred to as "Losses"), to the extent such Losses are
                  incurred by DuPont arising out of or as a result of any
                  negligence, willful misconduct, breach of contract or
                  violations of





Ethylene Storage and Throughput Agreement                                 Page 8
<PAGE>   47


                  law or regulation by Conoco, its employees, agents,
                  subcontractors or assigns in the performance of services
                  provided pursuant to this Agreement. The Losses covered under
                  this paragraph, unless provided for in paragraphs B and C
                  above, include, without limitation, Losses from actual or
                  alleged (1) injury to or death of any person, including
                  agents, subcontractors and assigns of DuPont, (2) loss of or
                  damage to property including, without limitation, property of
                  DuPont and (3) damage to the environment.

         E.       DuPont shall, to the extent permitted by law, fully indemnify,
                  defend and hold harmless, Conoco, with respect to any and all
                  claims, losses, damages, fines, debts, cost, expenses, and
                  penalties, liabilities, causes of action, including without
                  limitation, settlement costs and any reasonable legal or other
                  expenses paid to a third party for investigating or defending
                  any actions or threatened actions, (herein collectively
                  referred to as "Losses"), to the extent such Losses are
                  incurred by Conoco arising out of or a result of any
                  negligence, willful misconduct, breach of contract or
                  violations of law or regulation by DuPont, its employees,
                  agents, subcontractors or assigns in the performance of
                  services provided pursuant to this Agreement. The Losses
                  covered under this paragraph, unless provided for in
                  paragraphs B and C above, include, without limitation, Losses
                  from actual or alleged (1) injury to or death of any person,
                  including agents, subcontractors and assigns of Conoco, (2)
                  loss of or damage to property including, without limitation,
                  property of Conoco and (3) damage to the environment.

         F.       Joint Responsibility. In circumstances that both Parties are
                  in some measure responsible for Losses as described in
                  Paragraphs D and E above, the Parties shall indemnify the
                  other to the extent of its proportional share of its
                  responsibility of such Losses.

         G.       Waiver of Consequential and Punitive Damages. NOTWITHSTANDING
                  ANYTHING TO THE CONTRARY CONTAINED IN THIS AGREEMENT OR AT LAW
                  OR IN EQUITY, IN NO EVENT SHALL CONOCO BE LIABLE FOR PUNITIVE,
                  SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES (INCLUDING WITHOUT
                  LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS, BUSINESS
                  INTERRUPTION OR ANY OTHER LOSS) ARISING FROM OR RELATING TO
                  ANY CLAIM MADE UNDER THIS AGREEMENT OR REGARDING THE PROVISION
                  OF OR THE FAILURE TO PROVIDE THE STORAGE AND THROUGHPUT
                  SERVICES HEREUNDER, EVEN IF CONOCO HAS BEEN ADVISED OF THE
                  POSSIBILITY OF SUCH DAMAGES.




Ethylene Storage and Throughput Agreement                                 Page 9
<PAGE>   48



         H.       Exclusive Remedy. The terms and provisions of this Article X
                  shall be the sole and exclusive remedy of each of the Parties
                  indemnified hereunder with respect to the transactions
                  contemplated in this Agreement.

         I.       Notice of Claims. Notice of claims for loss, damage, or
                  indemnity in connection with the services provided under this
                  Agreement must be made to Conoco in writing within ninety (90)
                  days after the same having become known to DuPont or should
                  have become known to DuPont. Such claims must be set forth in
                  specific detail and must be delivered to Conoco within the
                  ninety (90) day period and, unless so made and delivered to
                  Conoco, Conoco shall be wholly released and discharged
                  therefrom and shall not be liable therefore in any manner
                  whatsoever. Conoco shall use best efforts to respond timely to
                  any DuPont claim. No suit at law or in equity shall be
                  maintained upon any claim unless such claim is brought within
                  two (2) years of Conoco's refusal to accept such claim.

 Article X.       FORCE MAJEURE 

         A.       Force Majeure. Neither Party shall be liable to the other for
                  failure or delay in performance under this Agreement to the
                  extent that the failure or delay is due directly or indirectly
                  to Force Majeure, which is herein defined to include without
                  limitation, Acts of God or other causes beyond the reasonable
                  control of the Parties, war (whether declared or not), fire,
                  flood, lightning, hurricane or other storm, earthquake,
                  geological failure, acts of public enemy, explosion,
                  scheduling, operational and maintenance restrictions,
                  rebellion, riot, insurrections, sabotage, invasion, accident,
                  epidemic, strikes, lockouts or other labor difficulties or
                  industrial disturbances, compliance with acts, rules,
                  regulations, or orders of federal, state, or local government,
                  any agency thereof or any other authority having or purporting
                  to have jurisdiction, mechanical failures or similar causes
                  not due to either Party's fault or negligence, official order
                  or industry-wide request, any inability to secure necessary
                  parts or materials, including the inability to secure
                  materials by reason of allocations promulgated by authorized
                  governmental agencies, or any other contingency beyond the
                  control of the affected Party which interferes with the
                  performance hereunder.

         B.       Suspension of Performance. Performance under this Agreement
                  shall be suspended (except for the payment of money due or to
                  become due for past performance hereunder) during the period
                  of such Force Majeure to the extent made necessary by the
                  Force Majeure; provided, the settlement of strikes, lockouts,
                  industrial disputes, or disturbances shall be entirely within
                  the discretion of the Party so settling to accede to the
                  demands of the



Ethylene Storage and Throughput Agreement                                Page 10
<PAGE>   49



                  demands of any opposing party when such course is inadvisable
                  in the discretion of the Party having the difficulty.

         C.       No Effect on Term. No curtailment, suspension, or acceptance
                  of performance pursuant to this Article X shall operate to
                  extend the term of, or to terminate, this Agreement.
                  Performance under this Agreement shall resume to the extent
                  made possible by the end or amelioration of the Force Majeure
                  event. The Party suffering a Force Majeure event shall notify
                  the other Party immediately by telephone and confirm the same
                  in writing, giving reasonable detail regarding the type of
                  Force Majeure and its estimated duration.

         D.       Notice. A Party claiming Force Majeure shall notify the other
                  Party immediately by telephone, E-mail, and/or fax and confirm
                  the same in writing, giving reasonable detail regarding the
                  type of Force Majeure and its estimated duration.

Article XI.       MISCELLANEOUS PROVISIONS 

         A.       Taxes. DuPont shall pay any and all lawful taxes, assessments,
                  or charges levied or assessed against DuPont's Product or
                  other assets including, but not limited to, any gross receipts
                  tax, use tax, sales tax and ad valorem tax. DuPont shall
                  immediately reimburse Conoco for any such taxes, assessments
                  or charges paid by Conoco on behalf of DuPont upon receipt of
                  notice of payment. Conoco shall pay all income-related taxes
                  and all employee-related taxes and charges such as
                  withholdings, FICA, FICM, unemployment and other similar
                  taxes.



Ethylene Storage and Throughput Agreement                                Page 11
<PAGE>   50



         B.       Notice. All notices, demands, request and other communications
                  necessary to be given hereunder shall be in writing and deemed
                  given if personally delivered, forwarded by facsimile
                  transmission (with proof of transmission capability), or
                  mailed by either certified mail, return receipt requested, or
                  sent by recognized overnight carrier to the respective Party
                  at its address below:

                    If to Conoco:
                       Conoco Inc. 
                       P.O. Box 2197
                       Houston, Texas 77252-2197 
                       
                       Attn: Director, Fractionation Services and Logistics 
                       Telephone: (281) 293-1198 
                       Facsimile: (281) 293-5990 
                    
                    If to DuPont and related to: 

                       Pricing and contract issues: 

                          DuPont Sourcing 
                          P.O. Box 80022 
                          Wilmington, DE 19880-0022 

                          Attn: Sourcing Manager
                          Telephone: (302) 992-6085 
                          Facsimile: (302) 992-3966 

                       Legal issues: 

                          DuPont Legal 
                          1007 Market Street 
                          Wilmington, DE 19898

                          Attn: Logistics and Commerce Counsel 
                          Telephone: (302) 774-1539
                          Facsimile: (302) 774-4812 

                       Operations, Day to Day issues:

                          DuPont Packaging and Industrial Polymers 
                          1007 Market Street
                          Wilmington, DE 19898 

                          Attn: Manager, Contract Manufacturing
                          Telephone: (302) 774-6105 
                          Facsimile: (302) 774-2005 




Ethylene Storage and Throughput Agreement                                Page 12
<PAGE>   51


         C.       Assignment. Neither Party shall assign any portion of its
                  rights or obligations under this Agreement without the prior
                  written consent of the other, which consent shall not be
                  unreasonably withheld; provided however, either Party may
                  assign this Agreement to a parent corporation, or any
                  subsidiary or affiliate with respect to which it holds at
                  least fifty-one percent (51%) of the voting stock, without the
                  consent of the other Party; provided further, the original
                  Parties to this Agreement shall remain primarily obligated
                  hereunder. This Agreement shall be binding upon and inure to
                  the benefit of the Parties hereto, their successors and
                  assigns and nothing contained in this Agreement, express or
                  implied, is intended to confer upon any other person or entity
                  any benefits, rights, or remedies. Notwithstanding the
                  foregoing, DuPont shall have the right to freely assign its
                  entire interest in this Agreement to a third party pursuant to
                  such third party acquiring DuPont assets that are served by
                  Conoco under this Agreement.

         D.       Rules and Regulations. This Agreement and the provisions
                  hereof shall be subject to, and the Parties agree to comply
                  with, all applicable local, state, and federal laws and to all
                  applicable rules, regulations, orders and directives of any
                  governmental authority, agency, commission, or regulatory body
                  in connection with any and all matters or things under or
                  incident to this Agreement. The Parties warrant to one another
                  that they comply with all applicable laws, rules, orders, and
                  regulations of governmental authority covering the production,
                  sale and delivery of the goods or services specified herein,
                  including, but not limited to, the Equal Opportunity Clause
                  prescribed in 41 CFR 60-1.4; the Affirmative Action Clause
                  prescribed in 41 CFR 60-250.4, regarding disabled veterans and
                  veterans of the Vietnam Era; the Affirmative Action Clause for
                  Handicapped Workers prescribed in 41 CFR 60-741.4; 48 CFR
                  Chapter 1 Subpart 19.7 regarding Small Business and Small
                  Disadvantaged Business Concerns; 48 CFR Chapter 1 Subpart 20.3
                  regarding Utilization of Labor Surplus Area Concerns;
                  Executive Order 12138 and regulations thereunder regarding
                  subcontracts to women-owned business concerns; Affirmative
                  Action Compliance Program (41 CFR 60-1.40); annually file
                  SF-100 Employer Information Report (41 CFR 60-1.7); 41 CFR
                  60-1.8 prohibiting segregated facilities; and the Fair Labor
                  Standards Act of 1938, as amended.

         E.       Governing Law, Waiver of Jury Trial and Consent to
                  Jurisdiction. THIS AGREEMENT SHALL BE GOVERNED, CONSTRUED, AND
                  ENFORCED IN ACCORDANCE WITH THE LAWS OF THE STATE OF DELAWARE
                  IRRESPECTIVE OF THE RESIDENCE, PLACE OF
 


Ethylene Storage and Throughput Agreement                                Page 13
<PAGE>   52



                  BUSINESS, OR DOMICILE OF THE PARTIES HERETO OR PLACE OF
                  EXECUTION BY ANY PARTY HERETO, AND NOTWITHSTANDING ANY
                  CONFLICT OF LAWS OR PROVISIONS TO THE CONTRARY. THIS AGREEMENT
                  SHALL NOT BE GOVERNED BY THE U. N. CONVENTION ON CONTRACTS FOR
                  THE INTERNATIONAL SALE OF GOODS. IN ADDITION, EACH PARTY
                  HEREBY (a) WAIVES ANY AND ALL RIGHTS IT MAY HAVE TO A JURY
                  TRIAL IN CONNECTION WITH ANY MATTER OR RIGHT ARISING UNDER
                  THIS AGREEMENT OR RELATING TO THE TRANSITIONAL SERVICES, (b)
                  CONSENTS TO THE EXCLUSIVE JURISDICTION OF ANY STATE OR FEDERAL
                  COURT WITHIN THE STATE OF DELAWARE AND IRREVOCABLY AGREES THAT
                  ALL ACTIONS OR PROCEEDINGS ARISING UNDER OR RELATING TO THIS
                  AGREEMENT OR THE TRANSITIONAL SERVICES SHALL BE LITIGATED IN
                  ANY SUCH COURT, AND (c) WAIVES ANY OBJECTION WHICH IT MAY HAVE
                  BASED UPON IMPROPER VENUE OR FORUM NON CONVENIENS TO THE
                  CONDUCT OF ANY PROCEEDINGS IN ANY SUCH COURT. 

         F.       Alternative Dispute Resolution.

                           1.    Both Parties understand and appreciate that
                                 their long term mutual interests will be best
                                 served by affecting a rapid and fair resolution
                                 of any claims or disputes which may arise out
                                 of this Agreement. Therefore, both Parties
                                 agree to use their best efforts to resolve all
                                 such disputes as rapidly as possible on a fair
                                 and equitable basis. Toward this end both
                                 Parties agree to develop and follow a process
                                 for presenting, rapidly assessing, and settling
                                 claims and other disputes on a fair and
                                 equitable basis.

                           2.    If any dispute or claim arising under this
                                 Agreement cannot be readily resolved by the
                                 Parties pursuant to Paragraph F.1 above, the
                                 Parties agree to refer the matter to a panel
                                 consisting of one (1) senior executive from
                                 each Party for review and resolution. The
                                 senior executive shall not have been directly
                                 involved in the claim or dispute. A copy of the
                                 Agreement, relevant facts, areas of
                                 disagreement, and concise summary of the basis
                                 for each side's contentions will be provided to
                                 both executives who shall review the same,
                                 confer, and attempt to reach a mutual
                                 resolution of the issue. The senior executives
                                 shall attempt to meet and resolve the dispute
                                 within thirty (30) days of their appointment.

                           3.    If the dispute cannot be resolved, under the
                                 process set forth in Paragraph F.2 above,
                                 within ten (10) days from the date of the
                  





Ethylene Storage and Throughput Agreement                                Page 14
<PAGE>   53



                                 panel's conference, the Parties agree to
                                 attempt to resolve the dispute or claim through
                                 non-binding mediation. The Parties shall select
                                 a single qualified Mediator, knowledgeable in
                                 the pertinent industry, who is not presently
                                 affiliated with or related to either Party. The
                                 Mediator shall hold a hearing (not to exceed
                                 one (1) day) as soon as practicable after his
                                 appointment (but not later than thirty (30)
                                 days after his appointment) during which each
                                 Party shall present its version of the matter,
                                 supported, if desired, by a brief statement of
                                 the issue(s), sworn, written testimony,
                                 relevant documents, its assessment of damages,
                                 and its argument. The Parties shall provide the
                                 Mediator with copies of all such materials as
                                 well as any documents provided to their senior
                                 executives under Paragraph F.2 at least ten
                                 (10) days prior to the scheduled date of the
                                 mediation hearing. The Parties may also provide
                                 the Mediator with copies of any laws or
                                 regulations which they feel are relevant to the
                                 dispute. A copy of the Contract will be
                                 provided to the Mediator. Formal written
                                 arguments, legal memoranda, and live testimony
                                 are discouraged but may be permitted at the
                                 discretion of the Mediator. Both Parties agree
                                 to make any relevant and involved employees or
                                 documents available to the other Party for its
                                 review and use in preparing its position under
                                 this clause without the need for subpoena or
                                 other court order.

                           4.    The Mediator, within ten (10) days of the
                                 completion of the hearing, will meet separately
                                 with both Parties and provide each of them, on
                                 a confidential basis, with his/her written
                                 views of the strengths and weaknesses of their
                                 respective positions. The Parties will then
                                 reconvene and, with the assistance of the
                                 Mediator, attempt to resolve the matter. If
                                 resolution cannot be achieved by the Parties
                                 within forty-eight (48) hours of this second
                                 meeting, the Mediator will, within ten (10)
                                 additional days, issue a written, non-binding
                                 decision on the issue.

                           5.    Each Party shall, within five (5) days of the
                                 Mediator's written decision, notify the other
                                 in writing whether it will accept or reject
                                 that decision. If the matter has not been
                                 resolved utilizing the processes set forth in
                                 this clause and the Parties are unwilling to
                                 accept the non-binding decision of the
                                 Mediator, either or both Parties may elect to
                                 pursue resolution through litigation.

                           6.    The selected Mediator shall execute a
                                 confidentiality agreement, satisfactory to all
                                 Parties, prior to his/her active participation
                                 in the





Ethylene Storage and Throughput Agreement                                Page 15
<PAGE>   54



                                 mediation. The costs of the Mediator shall be
                                 shared equally by the Parties. Each Party will
                                 bear its own costs of mediation.

                           7.    If the Parties cannot agree upon a choice of a
                                 Mediator within ten (10) days of the date of
                                 the panel's conference pursuant to Paragraph
                                 F.2, either or both Parties may elect to
                                 directly pursue litigation.

                           8.    All statements, correspondence, memoranda,
                                 briefs, decisions, testimony, communications,
                                 and materials, whether written or oral,
                                 submitted to or generated by the panel and/or
                                 Mediator in connection with the processes set
                                 forth above shall be deemed to be in
                                 furtherance of settlement negotiations and
                                 shall be privileged and shielded from
                                 production and disclosure in any subsequent
                                 litigation. Notwithstanding the foregoing,
                                 documents prepared in the normal course of
                                 business, such as invoices, shall be subject to
                                 discovery in subsequent litigation in
                                 accordance with applicable law.

                  G.       Hazards. EACH PARTY ACKNOWLEDGES THAT THERE ARE
                           HAZARDS ASSOCIATED WITH THE STORAGE AND USE OF
                           PRODUCT, THAT IT UNDERSTANDS SUCH HAZARDS, AND THAT
                           IT IS ITS OWN RESPONSIBILITY TO WARN AND PROTECT ITS
                           EMPLOYEES AND OTHERS WHO MAY BE EXPOSED TO SUCH
                           HAZARDS IN CONNECTION WITH ITS RESPONSIBILITIES AND
                           OBLIGATIONS CONCERNING THE STORAGE AND USE OF THIS
                           PRODUCT CONTEMPLATED BY THIS AGREEMENT. 

                  H.       Headings. Headings used in this Agreement are for
                           convenience of the Parties only, and shall not be
                           taken into account in construing or interpreting this
                           Agreement.

                  I.       Entire Agreement. This Agreement contains the entire
                           Agreement and understanding of the Parties with
                           respect to the matters contained herein and there are
                           no promises, assurances, terms, conditions, or
                           obligations, whether by precedent or otherwise, other
                           than those contained herein. This Agreement cancels
                           and supercedes any agreement covering the storage and
                           throughput of Product at Conoco's Mont Belvieu
                           Storage Facility or any other agreement incident
                           thereto previously executed by the Parties.

                  J.       Amendment. This Agreement shall not be amended or
                           modified except by written instrument executed by
                           duly authorized representatives of the respective
                           Parties.

                  K.       Counterparts. This Agreement may be executed in
                           counterparts, each of which shall constitute on
                           original and all of which shall constitute one
                           document.




Ethylene Storage and Throughput Agreement                                Page 16
<PAGE>   55



                  L.       Waivers. No waiver of the provisions hereof shall be
                           effective unless in writing and signed by the Party
                           to be charged with such waiver. No waiver shall be
                           deemed a continuing waiver or waiver in respect of
                           any subsequent breach or default, either of a similar
                           or dissimilar nature, unless expressly so stated in
                           writing.

                  M.       Confidentiality. Neither Conoco nor DuPont shall
                           disclose any term or condition of this Agreement
                           without the prior written consent of the other Party,
                           which consent will not be unreasonably withheld. In
                           the event of the termination of this Agreement,
                           Conoco and DuPont shall, to the extent permitted by
                           law, keep confidential and not use any confidential
                           information obtained pursuant to this Agreement,
                           unless prior written consent is obtained or such
                           information is readily ascertainable from public or
                           published information or trade sources or is received
                           by DuPont from a third party having no obligation of
                           confidentiality with respect to such information. 
                    
                  N.       Default. In the event either Party to this Agreement
                           shall default in the performance of any obligations
                           specified, the nondefaulting Party shall notify the
                           other Party in writing, and if such default is not
                           remedied with reasonable promptness, then the
                           nondefaulting Party shall have the right to terminate
                           this Contract immediately. Termination under this
                           Article, or under any other Article of this Contract,
                           shall not relieve or release either Party from any
                           liability which accrued prior to the date of such
                           termination. 

                  O.       CHEMTREC. The Parties agree to use CHEMTREC to report
                           any chemical emergency relating to any Product under
                           this Agreement.

                  P.       Safety. The Parties are vitally interested in safety
                           and in the safe practices of all activities covered
                           under this Agreement. Thus, Parties agree to maintain
                           mutually agreeable safety standards for activities
                           covered under this Agreement which are no less
                           stringent than safety standards which are in effect
                           at the Effective Date. In addition to endeavoring to
                           maintain high safety standards, the Parties agree
                           that its employees, contractors, subcontractors and
                           agents shall respect and abide by the other Party's
                           plant and site safety rules when the one Party has
                           personnel on the other Party's plant or site.

                  Q.       Independent Contractor. It is understood that
                           employees, methods, facilities, and equipment of
                           Conoco shall at all times be under its exclusive
                           direction and control. Conoco's relationship to
                           DuPont shall be that of an independent contractor.
                           Nothing in the Contract shall be construed to
                           constitute Conoco, or any of its employees, as an
                           agent, associate, joint 




Ethylene Storage and Throughput Agreement                                Page 17
<PAGE>   56



                           venturer, or partner of DuPont. However, DuPont may
                           from time to time appoint, in writing, Conoco to act
                           as an agent for limited purposes.

                  R.       Minority Vendors. The Parties agree to provide
                           maximum practicable utilization of Minority
                           subcontractors and vendors among its sources of
                           supply in the performance of this Contract.
                           Minorities include but are not limited to Black
                           Americans, Hispanic Americans, Native Americans,
                           Asian Pacific Americans, and Native Hawaiian
                           Organizations. A Minority business is at least
                           fifty-one percent (51%) owned by a Minority or group
                           of Minorities and has its management and daily
                           business controlled by one (1) or more such
                           individuals. Conoco shall report to DuPont on a
                           quarterly basis the dollar amounts paid by Conoco
                           during the previous quarter to minority
                           subcontractors and vendors for goods and services
                           used in the performance of this Agreement. 

                  S.       Year 2000 Compliance. 

                           1.    Each Party covenants and agrees that it will
                                 not permit a Year 2000 Problem to computer
                                 systems, software or equipment owned, leased or
                                 licensed by it, its affiliates or subsidiaries
                                 to interfere with its performance under this
                                 Agreement. Each Party further agrees to request
                                 from those of its suppliers whose performance
                                 may materially affect that Party's performance
                                 hereunder, that each such supplier undertake
                                 the same obligation with respect to such
                                 material performance. The Parties will use
                                 reasonable commercial efforts to cooperate and
                                 share information to further comply with this
                                 Article, and to minimize the impact of Year
                                 2000 Problems on performance of this Agreement.
                                 Each Party will inform the other Party of any
                                 circumstance indicating a possible obstacle to
                                 such compliance, and the steps being taken to
                                 avoid or overcome the obstacle.

                           2.    Provided a Party complies with Paragraph S.1
                                 above, such Party will not be liable to the
                                 other Party hereto for any failure to perform
                                 obligations under this Agreement to the extent
                                 such failure to perform arises from a Year 2000
                                 Problem a) affecting one of the non-performing
                                 Party's suppliers or b) beyond that Party's
                                 reasonable control (e.g. a Year 2000 Problem
                                 affecting a governmental entity). IN PARTICULAR
                                 SUCH NON-PERFORMING PARTY SHALL HAVE NO
                                 LIABILITY FOR ANY DAMAGES, INCLUDING DIRECT,
                                 INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL,
                                 PUNITIVE OR EXEMPLARY DAMAGES.



Ethylene Storage and Throughput Agreement                                Page 18

<PAGE>   57



                           3.    A "Year 2000 Problem" means a date handling
                                 problem relating to the Year 2000 date change
                                 that would cause a computer system, software or
                                 equipment to fail to correctly perform, process
                                 and handle date related data for the dates
                                 within and between the twentieth and
                                 twenty-first centuries and all other centuries.

                  T.       Continuous Improvement. The Parties will meet from
                           time to time, preferably at least once per year, to
                           consider potential operating cost saving measures
                           that may be employed in the performance of services
                           rendered under this Agreement. The Parties agree
                           that, to the extent that operating cost savings are
                           achieved, each Party will share with the other, on a
                           50/50 basis, the benefits of any cost savings
                           realized for the remainder of the term.

                  U.       Controlled Substance Abuse. The Parties agree that
                           the use, possession, manufacture, dispensing, sale
                           and distribution of alcohol, drugs, and other
                           controlled substances on their respective premises
                           and on or in vehicles and equipment used for the
                           purposes of this Agreement shall be prohibited. In
                           addition, the Parties shall prohibit from their
                           property the presence of any individual having a
                           controlled substance in his/her body for non-medical
                           reasons. The Parties shall develop a mutually
                           agreeable Controlled Substance Abuse policy,
                           including drug testing, which is at least as rigorous
                           as Conoco's current policy and complies with DOT's
                           policy relating to pipeline operations.

IN WITNESS WHEREOF, the Parties hereto have caused this Agreement to be executed
on the day indicated.

                                         Conoco Inc.

                                         By:
                                            -----------------------------------

                                         Title:
                                              ---------------------------------

                                         Date:
                                              ---------------------------------



                                         E. I. du Pont de Nemours and Company

                                         By:
                                            -----------------------------------

                                         Title:
                                               --------------------------------

                                         Date:
                                              ---------------------------------



Ethylen Storage and Throughput Agreement                                 Page 19







<PAGE>   58
                                                                 EXHIBIT 10.18

                      INTERIM PIPELINE OPERATION AGREEMENT


         This Interim Pipeline Operation Agreement ("Agreement") is effective
7:00 a.m. Mont Belvieu, Texas local time on the Effective Date by and between
Conoco Inc., a Delaware corporation with its principal place of business at 600
North Dairy Ashford Road, Houston, Texas 77079 ("Conoco") and E. I. du Pont de
Nemours and Company, a Delaware corporation, with its principal place of
business at 1007 Market Street, Wilmington, Delaware 19898 ("DuPont"). (Conoco
and DuPont are at times referred to herein individually as a "Party" and
collectively as "Parties").

                                   WITNESSETH

         WHEREAS, prior to the Effective Date (the date on which the Conoco
initial public offering closes wherein the initial public offering of Conoco is
defined in the Restructuring, Transfer and Separation Agreement), Conoco has
heretofore provided pipeline operation services to DuPont for certain pipelines
(set forth in Appendix A and referred to as "Pipeline(s)") in the Texas gulf
coast area that are owned by DuPont; and

         WHEREAS, DuPont desires that Conoco continue to operate the Pipelines
on an interim basis and has requested that certain such services continue
pursuant to this Agreement; and

         WHEREAS, Conoco and DuPont do now desire to enter into this Agreement
which will, effective as of the Effective Date, provide for operation of the
Pipelines by Conoco; and

         NOW, THEREFORE, subject to and in consideration of the terms,
conditions and covenants contained in this Agreement, Conoco and DuPont agree as
follows:

Article I.        OPERATION OF PIPELINES

                  Conoco hereby agrees to operate and maintain the Pipelines and
                  to act on DuPont's behalf and/or at DuPont's direction
                  concerning movements of products through the Pipelines as
                  appropriate. The duties associated with operating the
                  Pipelines are listed in the attached Appendix B. It is agreed
                  by the Parties that the nature and scope of the duties to be
                  performed by Conoco in operating the Pipelines cannot be
                  completely listed as the Parties cannot foresee all possible
                  circumstances which might arise. Thus, it is agreed that
                  Conoco will exercise its best judgment, in consultation with
                  DuPont if possible, in the performance of the duties required
                  for safe and prudent pipeline operations not specifically
                  listed in Appendix B. 

                  Conoco shall exercise its reasonable judgment to operate and
                  maintain the Pipelines in a safe and prudent manner in
                  accordance with applicable


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<PAGE>   59

                  governmental laws and regulations and accepted industry
                  standards and practices.

                  The Parties further agree to, from time to time, mutually
                  develop metrics for monitoring each other's performance under
                  this Agreement and particularly to aid in the early
                  identification and correction of problems that may arise
                  during the term of the Agreement.

                  Conoco shall during the term of this Agreement provide
                  reasonable assistance as requested by DuPont to aid in
                  securing continuing pipeline operation services for the
                  Pipelines and the transition from Conoco to the succeeding
                  pipeline operation service provider.

Article II.       TITLE AND RISK OF LOSS

                  Title to product in the Pipelines and all risk of loss thereof
                  shall remain at all times with DuPont and shall not transfer
                  to Conoco; provided, however, DuPont shall remain liable to
                  Conoco for all fees, costs, and all other liabilities as set
                  forth in this Agreement, regardless of whether DuPont or
                  DuPont's customer has title to the Product.

Article III.      CONSIDERATION AND PAYMENT

                  Conoco may issue invoices to DuPont periodically. DuPont
                  agrees to remit payment to Conoco via wire transfer within
                  thirty (30) days of the date of any invoice for all undisputed
                  amounts for services under this Agreement. Conoco will invoice
                  DuPont for:

                  A.       "Direct Costs" which are all expenses, including
                           Capital Cost, incurred by Conoco as a direct result
                           of providing services under this Agreement. Direct
                           Costs are costs which are necessary in the
                           performance of Conoco's duties and are specific to a
                           certain Pipeline. Specific Direct Costs include, but
                           are not limited to, repair material, contract labor,
                           supervisory RTU repair costs, insurance, regulatory
                           assessments, and utilities for the Pipelines.

                  B.       "Allocated Costs" which are costs which are necessary
                           in the performance of Conoco's duties, but are not
                           specific to any certain Pipeline. Allocated Costs
                           include the wages, benefits, travel expenses,
                           training, safety equipment and other related employee
                           expenses for non-headquarters based employees that
                           provide services to the Pipelines. The determination
                           of the proper allocation of costs between the
                           Pipelines and other facilities and pipelines shall be
                           made solely by Conoco in good faith.

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<PAGE>   60

                  C.       "Overhead" is an amount added to Conoco's invoices to
                           DuPont to cover Conoco's expenses for its
                           Headquarters' operating and engineering staffs as
                           well as its supporting Legal, Right-of-Way,
                           Accounting, Risk Management, Tax, Computer, and other
                           administrative support groups as utilized in normal
                           day-to-day operations. Overhead shall be equal to
                           twenty-five percent (25%) of the Direct Costs and
                           Allocated Costs. Costs for engineering and other
                           support personnel assigned on a full-time basis to
                           specific major projects on the Pipelines will be
                           charged to those projects directly.

Article IV.       CAPITAL COSTS

                  Projects requiring capital expenditures ("Capital Costs") will
                  be approved by DuPont, except in emergencies. Conoco will
                  supervise, construct, approve and make payment of individual
                  invoices for said projects, and DuPont will provide adequate
                  financial prepayments to Conoco based upon projected forecasts
                  of capital expenditures.

Article V.        ACCOUNTING AND AUDIT

                  Conoco will maintain accurate accounts and supporting
                  documentation, in accordance with the Generally Accepted
                  Accounting Principles and Practices, of all costs, expenses
                  and liabilities incurred in servicing, repairing, maintaining,
                  and administering the Pipelines for a period of at least five
                  years. Each month Conoco will transmit to DuPont a statement
                  showing the total charges under this Agreement for the account
                  of DuPont during the preceding calendar month. DuPont may at
                  its option and expense, inspect and audit the accounts of
                  Conoco for the most recent two calendar years relating to any
                  charges incurred by Conoco under this Agreement. Each audit
                  must be conducted during office hours and with at least
                  forty-eight (48) hours advance notice. If DuPont shall require
                  a second audit or inspection in any single year, DuPont shall
                  pay all of Conoco's costs, as determined in Conoco's
                  reasonable discretion, plus any other costs associated with
                  such second audit or inspection.

Article VI.       TERM OF AGREEMENT

                  This agreement will remain in effect for a period of one (1)
                  year from the Effective Date.

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<PAGE>   61

Article VII.      LIABILITIES, INDEMNITIES, CLAIMS

         A.       In the absence of gross negligence or reckless or willful
                  misconduct on Conoco's part, and whether or not it is
                  negligent, Conoco shall not be liable for any claims,
                  liabilities, damages, losses, costs, expenses (including, but
                  not limited to, settlements, judgments, court costs and
                  reasonable attorneys' fees), fines and penalties, arising out
                  of any actual or alleged injury, loss or damage of any nature
                  whatsoever in providing or failing to provide the Pipeline
                  Operation to DuPont. Notwithstanding anything to the contrary
                  contained herein, in the event Conoco commits an error with
                  respect to or incorrectly performs or fails to perform any
                  service provided under this Agreement, at DuPont's request,
                  Conoco shall use reasonable efforts to correct such error,
                  re-perform or perform such service; provided, that Conoco
                  shall have no obligation to recreate any lost or destroyed
                  data to the extent the same cannot be cured by the
                  re-performance of the service in question.


         B.       Conoco's liability for damages to DuPont for any cause
                  whatsoever, regardless of the form of action, whether in
                  contract or in tort, including negligence, gross negligence or
                  willful misconduct, shall be limited to the payments made
                  hereunder for the Pipeline Operation Services that allegedly
                  caused the damage during the period which the alleged damage
                  was incurred by DuPont. In no event shall Conoco be liable for
                  any damages caused by Conoco's failure to perform DuPont's
                  responsibilities hereunder. Conoco will not be liable to
                  DuPont for any act or omission of any other entity (other than
                  due to a default by Conoco in any agreement between Conoco and
                  such other entity) furnishing any other service.


         C.       NOTWITHSTANDING ANYTHING TO THE CONTRARY CONTAINED HEREIN OR
                  AT LAW OR IN EQUITY, NEITHER PARTY SHALL BE LIABLE TO THE
                  OTHER FOR PUNITIVE, SPECIAL, INDIRECT, INCIDENTAL OR
                  CONSEQUENTIAL DAMAGES (INCLUDING, WITHOUT LIMITATION, DAMAGES
                  FOR LOSS OF BUSINESS PROFITS, BUSINESS INTERRUPTION OR ANY
                  OTHER LOSS) ARISING FROM OR RELATING TO ANY CLAIM MADE UNDER
                  THIS AGREEMENT OR REGARDING THE PROVISION OF OR THE FAILURE TO
                  PROVIDE THE TRANSITIONAL SERVICES.

Article VIII.     FORCE MAJEURE

         A.       Force Majeure. Neither Party shall be liable to the other for
                  failure or delay in performance under this Agreement to the
                  extent that the failure or delay is due directly or indirectly
                  to Force Majeure, which is herein defined to 


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<PAGE>   62

                  include without limitation, Acts of God or other causes beyond
                  the reasonable control of the Parties, war (whether declared
                  or not), fire, flood, lightning, hurricane or other storm,
                  earthquake, acts of public enemy, explosion, scheduling,
                  operational and maintenance restrictions, rebellion, riot,
                  insurrections, sabotage, invasion, accident, epidemic,
                  strikes, lockouts or other labor difficulties or industrial
                  disturbances, compliance with acts, rules, regulations, or
                  orders of federal, state, or local government, any agency
                  thereof or any other authority having or purporting to have
                  jurisdiction, mechanical failures or similar causes not due to
                  either Party's fault or negligence, official order or
                  industry-wide request, any inability to secure necessary parts
                  or materials, including the inability to secure materials by
                  reason of allocations promulgated by authorized governmental
                  agencies, or any other contingency beyond the control of the
                  affected Party which interferes with the performance
                  hereunder.

         B.       Suspension of Performance. Performance under this Agreement
                  shall be suspended (except for the payment of money due or to
                  become due for past performance hereunder) during the period
                  of such Force Majeure to the extent made necessary by the
                  Force Majeure; provided, the settlement of strikes, lockouts,
                  industrial disputes, or disturbances shall be entirely within
                  the discretion of the Party so settling to accede to the
                  demands of any opposing party when such course is inadvisable
                  in the discretion of the Party having the difficulty.

         C.       No Effect on Term. No curtailment, suspension, or acceptance
                  of performance pursuant to this Article VIII shall operate to
                  extend the term of, or to terminate, this Agreement.
                  Performance under this Agreement shall resume to the extent
                  made possible by the end or amelioration of the Force Majeure
                  event.

         D.       Notice. A Party claiming Force Majeure shall notify the other
                  Party immediately by telephone, E-mail and/or fax and confirm
                  the same in writing, giving reasonable detail regarding the
                  type of Force Majeure and its estimated duration.

Article IX.       MISCELLANEOUS PROVISIONS

         A.       Taxes. DuPont shall pay any and all lawful taxes, assessments,
                  or charges levied or assessed against DuPont's Product or
                  other assets including, but not limited to, any gross receipts
                  tax, use tax, sales tax and ad valorem tax. DuPont shall
                  immediately reimburse Conoco for any such taxes, assessments
                  or charges paid by Conoco on behalf of DuPont upon receipt of
                  notice of payment. Conoco shall pay all income-related taxes
                  and all 



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<PAGE>   63

                  employee-related taxes and charges such as withholdings, FICA,
                  FICM, unemployment and other similar taxes.

         B.       Notice. All notices, demands, request and other communications
                  necessary to be given hereunder shall be in writing and deemed
                  given if personally delivered, forwarded by facsimile
                  transmission (with proof of transmission capability), or
                  mailed by either certified mail, return receipt requested, or
                  sent by recognized overnight carrier to the respective Party
                  at its address below:

                           If to Conoco:

                                    Conoco Inc.
                                    P.O. Box 2197
                                    Houston, Texas 77252-2197

                                    Attn: Director, Fractionation Services and 
                                           Logistics
                                    Telephone: (281) 293-1198
                                    Facsimile: (281) 293-5990

                           If to DuPont and related to:

                                    Pricing and contract issues:

                                            DuPont Sourcing
                                            P.O. Box 80022
                                            Wilmington, DE  19880-0022

                                            Attn:  Sourcing Manager
                                            Telephone: (302) 992-6085
                                            Facsimile: (302) 992-3966

                                    Legal issues:

                                            DuPont Legal
                                            1007 Market Street
                                            Wilmington, DE  19898

                                            Attn: Logistics and Commerce Counsel
                                            Telephone: (302) 774-1539
                                            Facsimile: (302) 774-4812


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<PAGE>   64

                                   Operations, Day to Day issues:

                                            DuPont Sourcing
                                            1007 Market Street
                                            Wilmington, DE  19898

                                            Attn:  Manager, Logistics
                                            Telephone: (302) 774-4790
                                            Facsimile: (302) 774-7175

         C.       Assignment. Neither Party shall assign any portion of its
                  rights or obligations under this Agreement without the prior
                  written consent of the other, which consent shall not be
                  unreasonably withheld; provided however, either Party may
                  assign this Agreement to a parent corporation, or any
                  subsidiary or affiliate with respect to which it holds at
                  least fifty-one percent (51%) of the voting stock, without the
                  consent of the other Party; provided further, the original
                  Parties to this Agreement shall remain primarily obligated
                  hereunder. This Agreement shall be binding upon and inure to
                  the benefit of the Parties hereto, their successors and
                  assigns and nothing contained in this Agreement, express or
                  implied, is intended to confer upon any other person or entity
                  any benefits, rights, or remedies.

         D.       Rules and Regulations. This Agreement and the provisions
                  hereof shall be subject to, and the Parties agree to comply
                  with, all applicable local, state, and federal laws and to all
                  applicable rules, regulations, orders and directives of any
                  governmental authority, agency, commission, or regulatory body
                  in connection with any and all matters or things under or
                  incident to this Agreement. The Parties warrant to one another
                  that they comply with all applicable laws, rules, orders, and
                  regulations of governmental authority covering the production,
                  sale and delivery of the goods or services specified herein,
                  including, but not limited to, the Equal Opportunity Clause
                  prescribed in 41 CFR 60-1.4; the Affirmative Action Clause
                  prescribed in 41 CFR 60-250.4, regarding disabled veterans and
                  veterans of the Vietnam Era; the Affirmative Action Clause for
                  Handicapped Workers prescribed in 41 CFR 60-741.4; 48 CFR
                  Chapter 1 Subpart 19.7 regarding Small Business and Small
                  Disadvantaged Business Concerns; 48 CFR Chapter 1 Subpart 20.3
                  regarding Utilization of Labor Surplus Area Concerns;
                  Executive Order 12138 and regulations thereunder regarding
                  subcontracts to women-owned business concerns; Affirmative
                  Action Compliance Program (41 CFR 60-1.40); annually file
                  SF-100 Employer Information Report (41 CFR 60-1.7); 41 CFR
                  60-1.8 prohibiting segregated facilities; and the Fair Labor
                  Standards Act of 1938, as amended.


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<PAGE>   65


         E.       Governing Law, Waiver of Jury Trial and Consent to
                  Jurisdiction. THIS AGREEMENT SHALL BE GOVERNED, CONSTRUED, AND
                  ENFORCED IN ACCORDANCE WITH THE LAWS OF THE STATE OF DELAWARE
                  IRRESPECTIVE OF THE RESIDENCE, PLACE OF BUSINESS, OR DOMICILE
                  OF THE PARTIES HERETO OR PLACE OF EXECUTION BY ANY PARTY
                  HERETO, AND NOTWITHSTANDING ANY CONFLICT OF LAWS PROVISIONS TO
                  THE CONTRARY. THIS AGREEMENT SHALL NOT BE GOVERNED BY THE U.
                  N. CONVENTION ON CONTRACTS FOR THE INTERNATIONAL SALE OF
                  GOODS. IN ADDITION, EACH PARTY HEREBY (a) WAIVES ANY AND ALL
                  RIGHTS IT MAY HAVE TO A JURY TRIAL IN CONNECTION WITH ANY
                  MATTER OR RIGHT ARISING UNDER THIS AGREEMENT OR RELATING TO
                  THE TRANSITIONAL SERVICES, (b) CONSENTS TO THE EXCLUSIVE
                  JURISDICTION OF ANY STATE OR FEDERAL COURT WITHIN THE STATE OF
                  DELAWARE AND IRREVOCABLY AGREES THAT ALL ACTIONS OR
                  PROCEEDINGS ARISING UNDER OR RELATING TO THIS AGREEMENT OR THE
                  TRANSITIONAL SERVICES SHALL BE LITIGATED IN ANY SUCH COURT,
                  AND (c) WAIVES ANY OBJECTION WHICH IT MAY HAVE BASED UPON
                  IMPROPER VENUE OR FORUM NON CONVENIENS TO THE CONDUCT OF ANY
                  PROCEEDINGS IN ANY SUCH COURT.


         F.       Alternative Dispute Resolution.

                  1.       Both Parties understand and appreciate that their
                           long term mutual interests will be best served by
                           affecting a rapid and fair resolution of any claims
                           or disputes which may arise out of this Agreement.
                           Therefore, both Parties agree to use their best
                           efforts to resolve all such disputes as rapidly as
                           possible on a fair and equitable basis. Toward this
                           end both Parties agree to develop and follow a
                           process for presenting, rapidly assessing, and
                           settling claims and other disputes on a fair and
                           equitable basis.

                  2.       If any dispute or claim arising under this Agreement
                           cannot be readily resolved by the Parties pursuant to
                           Paragraph F.1 above, the Parties agree to refer the
                           matter to a panel consisting of one (1) senior
                           executive from each Party for review and resolution.
                           The senior executive shall not have been directly
                           involved in the claim or dispute. A copy of the
                           Agreement, relevant facts, areas of disagreement, and
                           concise summary of the basis for each side's
                           contentions will be provided to both executives who
                           shall review the same, confer, and attempt to reach a
                           mutual resolution of the issue. 


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<PAGE>   66

                           The senior executives shall attempt to meet and
                           resolve the dispute within thirty (30) days of their
                           appointment.

                  3.       If the dispute cannot be resolved, under the process
                           set forth in Paragraph F.2 above, within ten (10)
                           days from the date of the panel's conference, the
                           Parties agree to attempt to resolve the dispute or
                           claim through non-binding mediation. The Parties
                           shall select a single qualified Mediator,
                           knowledgeable in the pertinent industry, who is not
                           presently affiliated with or related to either Party.
                           The Mediator shall hold a hearing (not to exceed one
                           (1) day) as soon as practicable after his appointment
                           (but not later than thirty (30) days after his
                           appointment) during which each Party shall present
                           its version of the matter, supported, if desired, by
                           a brief statement of the issue(s), sworn, written
                           testimony, relevant documents, its assessment of
                           damages, and its argument. The Parties shall provide
                           the Mediator with copies of all such materials as
                           well as any documents provided to their senior
                           executives under Paragraph F.2 at least ten (10) days
                           prior to the scheduled date of the mediation hearing.
                           The Parties may also provide the Mediator with copies
                           of any laws or regulations which they feel are
                           relevant to the dispute. A copy of the Contract will
                           be provided to the Mediator. Formal written
                           arguments, legal memoranda, and live testimony are
                           discouraged but may be permitted at the discretion of
                           the Mediator. Both Parties agree to make any relevant
                           and involved employees or documents available to the
                           other Party for its review and use in preparing its
                           position under this clause without the need for
                           subpoena or other court order.

                  4.       The Mediator, within ten (10) days of the completion
                           of the hearing, will meet separately with both
                           Parties and provide each of them, on a confidential
                           basis, with his/her written views of the strengths
                           and weaknesses of their respective positions. The
                           Parties will then reconvene and, with the assistance
                           of the Mediator, attempt to resolve the matter. If
                           resolution cannot be achieved by the Parties within
                           forty-eight (48) hours of this second meeting, the
                           Mediator will, within ten (10) additional days, issue
                           a written, non-binding decision on the issue.

                  5.       Each Party shall, within five (5) days of the
                           Mediator's written decision, notify the other in
                           writing whether it will accept or reject that
                           decision. If the matter has not been resolved
                           utilizing the processes set forth in this clause and
                           the Parties are unwilling to 

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<PAGE>   67

                           accept the non-binding decision of the Mediator,
                           either or both Parties may elect to pursue resolution
                           through litigation.

                  6.       The selected Mediator shall execute a confidentiality
                           agreement, satisfactory to all Parties, prior to
                           his/her active participation in the mediation. The
                           costs of the Mediator shall be shared equally by the
                           Parties. Each Party will bear its own costs of
                           mediation.

                  7.       If the Parties cannot agree upon a choice of a
                           Mediator within ten (10) days of the date of the
                           panel's conference pursuant to Paragraph F.2, either
                           or both Parties may elect to directly pursue
                           litigation.

                  8.       All statements, correspondence, memoranda, briefs,
                           decisions, testimony, communications, and materials,
                           whether written or oral, submitted to or generated by
                           the panel and/or Mediator in connection with the
                           processes set forth above shall be deemed to be in
                           furtherance of settlement negotiations and shall be
                           privileged and shielded from production and
                           disclosure in any subsequent litigation.
                           Notwithstanding the foregoing, documents prepared in
                           the normal course of business, such as invoices,
                           shall be subject to discovery in subsequent
                           litigation in accordance with applicable law.


         G.       Hazards. EACH PARTY ACKNOWLEDGES THAT THERE ARE HAZARDS
                  ASSOCIATED WITH THE TRANSPORTATION AND USE OF PRODUCT, THAT IT
                  UNDERSTANDS SUCH HAZARDS, AND THAT IT IS ITS OWN
                  RESPONSIBILITY TO WARN AND PROTECT ITS EMPLOYEES AND OTHERS
                  WHO MAY BE EXPOSED TO SUCH HAZARDS IN CONNECTION WITH ITS
                  RESPONSIBILITIES AND OBLIGATIONS CONCERNING THE STORAGE AND
                  USE OF THIS PRODUCT CONTEMPLATED BY THIS AGREEMENT.

         H.       Headings. Headings used in this Agreement are for convenience
                  of the Parties only, and shall not be taken into account in
                  construing or interpreting this Agreement.

         I.       Entire Agreement. This Agreement contains the entire Agreement
                  and understanding of the Parties with respect to the matters
                  contained herein and there are no promises, assurances, terms,
                  conditions, or obligations, whether by precedent or otherwise,
                  other than those contained herein. This Agreement cancels and
                  supercedes any agreement covering the operation and
                  maintenance of the Pipelines or any other agreement incident
                  thereto previously executed by the parties.

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<PAGE>   68

         J.       Amendment. This Agreement shall not be amended or modified
                  except by written instrument executed by duly authorized
                  representatives of the respective Parties.

         K.       Counterparts. This Agreement may be executed in counterparts,
                  each of which shall constitute on original and all of which
                  shall constitute one document.

         L.       Waivers. No waiver of the provisions hereof shall be effective
                  unless in writing and signed by the Party to be charged with
                  such waiver. No waiver shall be deemed a continuing waiver or
                  waiver in respect to any subsequent breach or default, either
                  of a similar or dissimilar nature, unless expressly so stated
                  in writing.

         M.       Confidentiality. Neither Conoco nor DuPont shall disclose any
                  term or condition of this Agreement without the prior written
                  consent of the other Party, which consent will not be
                  unreasonably withheld. In the event of the termination of this
                  Agreement, Conoco and DuPont shall, to the extent permitted by
                  law, keep confidential and not use any confidential
                  information obtained pursuant to this Agreement, unless prior
                  written consent is obtained or such information is readily
                  ascertainable from public or published information or trade
                  sources or is received by a Party from a third party having no
                  obligation of confidentiality with respect to such
                  information.

         N.       Conoco Authority to Act for DuPont. The Parties agree that
                  Conoco's authority to act on behalf of DuPont or expend (or
                  commit to expend) monies for DuPont shall be restricted as
                  follows: 

                  1)       Authorization to make improvements and/or capital
                           investments shall be the responsibility of DuPont.
                           Once authorized by DuPont, Conoco may expend or cause
                           to be expended capital dollars on behalf of or for
                           DuPont's account.

                  2)       In emergency situations, Conoco may make commitments
                           to expend up to five hundred thousand dollars
                           ($500,000) without the prior approval of DuPont.

         O.       Default. In the event either Party to this Agreement shall
                  default in the performance of any obligations specified, the
                  nondefaulting Party shall notify the other Party in writing,
                  and if such default is not remedied with reasonable
                  promptness, then the nondefaulting Party shall have the right
                  to terminate this Contract immediately. Termination under this
                  Article, or under any other Article of this Contract, shall
                  not relieve or release either Party from any liability which
                  accrued prior to the date of such termination.

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<PAGE>   69

         P.       CHEMTREC. The Parties agree to use CHEMTREC to report any
                  chemical emergency relating to any product under this
                  Agreement.

         Q.       Safety. The Parties are vitally interested in safety and in
                  the safe practices of all activities covered under this
                  Agreement. Thus, Parties agree to maintain mutually agreeable
                  safety standards for activities covered under this Agreement
                  which are no less stringent than safety standards which are in
                  effect at the Effective Date. In addition to endeavoring to
                  maintain high safety standards, the Parties agree that its
                  employees, contractors, subcontractors and agents shall
                  respect and abide by the other Party's plant and site safety
                  rules when the one Party has personnel on the other Party's
                  plant or site.

         R.       Independent Contractor. It is understood that employees,
                  methods, facilities, and equipment of Conoco shall at all
                  times be under its exclusive direction and control. Conoco's
                  relationship to DuPont shall be that of an independent
                  contractor. Nothing in the Contract shall be construed to
                  constitute Conoco, or any of its employees, as an agent,
                  associate, joint venturer, or partner of DuPont. However,
                  DuPont may from time to time appoint, in writing, Conoco to
                  act as an agent for limited purposes.

         S.       Minority Vendors. The Parties agree to provide maximum
                  practicable utilization of Minority subcontractors and vendors
                  among its sources of supply in the performance of this
                  Contract. Minorities include but are not limited to Black
                  Americans, Hispanic Americans, Native Americans, Asian Pacific
                  Americans, and Native Hawaiian Organizations. A Minority
                  business is at least fifty-one percent (51%) owned by a
                  Minority or group of Minorities and has its management and
                  daily business controlled by one (1) or more such individuals.
                  Conoco shall report to DuPont on a quarterly basis the dollar
                  amounts paid by Conoco during the previous quarter to minority
                  subcontractors and vendors for goods and services used in the
                  performance of this Agreement.


         T.       Year 2000 Compliance.

                  1.       Each Party covenants and agrees that it will not
                           permit a Year 2000 Problem to computer systems,
                           software or equipment owned, leased or licensed by
                           it, its affiliates or subsidiaries to interfere with
                           its performance under this Agreement. Each Party
                           further agrees to request from those of its suppliers
                           whose performance may materially affect that Party's
                           performance hereunder, that each such supplier
                           undertake the same obligation with respect to such
                           material performance. The Parties will use reasonable
                           commercial efforts to cooperate and share information
                           to further comply with this Article, 

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<PAGE>   70

                           and to minimize the impact of Year 2000 Problems on
                           performance of this Agreement. Each Party will inform
                           the other Party of any circumstance indicating a
                           possible obstacle to such compliance, and the steps
                           being taken to avoid or overcome the obstacle.

                  2.       Provided a Party complies with Paragraph T.1 above,
                           such Party will not be liable to the other Party
                           hereto for any failure to perform obligations under
                           this Agreement to the extent such failure to perform
                           arises from a Year 2000 Problem a) affecting one of
                           the non-performing Party's suppliers or b) beyond
                           that Party's reasonable control (e.g. a Year 2000
                           Problem affecting a governmental entity). IN
                           PARTICULAR SUCH NON-PERFORMING PARTY SHALL HAVE NO
                           LIABILITY FOR ANY DAMAGES, INCLUDING DIRECT,
                           INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL,
                           PUNITIVE OR EXEMPLARY DAMAGES.

                  3.       A "Year 2000 Problem" means a date handling problem
                           relating to the Year 2000 date change that would
                           cause a computer system, software or equipment to
                           fail to correctly perform, process and handle date
                           related data for the dates within and between the
                           twentieth and twenty-first centuries and all other
                           centuries.

         U.       Continuous Improvement. The Parties will meet from time to
                  time, preferably at least once per year, to consider potential
                  operating cost saving measures that may be employed in the
                  performance of services rendered under this Agreement. The
                  Parties agree that, to the extent that operating cost savings
                  are achieved, each Party will share with the other, on a 50/50
                  basis, the benefits of any cost savings realized for the
                  remainder of the term.

         V.       Controlled Substance Abuse. The Parties agree that the use,
                  possession, manufacture, dispensing, sale and distribution of
                  alcohol, drugs, and other controlled substances on their
                  respective premises and on or in vehicles and equipment used
                  for the purposes of this Agreement shall be prohibited. In
                  addition, the Parties shall prohibit from their property the
                  presence of any individual having a controlled substance in
                  his/her body for non-medical reasons. The Parties shall
                  develop a mutually agreeable Controlled Substance Abuse
                  policy, including drug testing, which is at least as rigorous
                  as Conoco's current policy and complies with DOT's policy
                  relating to pipeline operations.

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<PAGE>   71

IN WITNESS WHEREOF, the Parties hereto have caused this Agreement to be executed
on the day indicated.

                                    Conoco Inc.

                                    By:
                                       ----------------------------------
                                    Title:
                                          -------------------------------
                                    Date:
                                         --------------------------------


                                    E. I. du Pont de Nemours and Company

                                    By:
                                       ----------------------------------
                                    Title:
                                          -------------------------------
                                    Date:
                                         --------------------------------


Interim Pipeline Operation Agreement                                     Page 14
<PAGE>   72
                                                                 EXHIBIT 10.18



                          PIPELINE OPERATION AGREEMENT

         This Pipeline Operation Agreement ("Agreement") is effective 7:00 a.m.
Mont Belvieu, Texas local time on the Effective Date by and between Conoco Inc.,
a Delaware corporation with its principal place of business at 600 North Dairy
Ashford Road, Houston, Texas 77079 ("Conoco") and E. I. du Pont de Nemours and
Company, a Delaware corporation, with its principal place of business at 1007
Market Street, Wilmington, Delaware 19898 ("DuPont"). (Conoco and DuPont are at
times referred to herein individually as a "Party" and collectively as
"Parties").

                                   WITNESSETH

         WHEREAS, prior to the Effective Date (the date on which the Conoco
initial public offering closes wherein the initial public offering of Conoco is
defined in the Restructuring, Transfer and Separation Agreement), Conoco has
heretofore provided pipeline operation services to DuPont for certain pipelines
(set forth in Appendix A and referred to as "Pipeline(s)") in the Texas gulf
coast area that are owned by DuPont; and

         WHEREAS, DuPont desires that Conoco continue to operate the Pipelines
and has requested that certain such services continue pursuant to this
Agreement; and

         WHEREAS, Conoco and DuPont do now desire to enter into this Agreement
which will, effective as of the Effective Date, provide for operation of the
Pipelines by Conoco; and

         NOW, THEREFORE, subject to and in consideration of the terms,
conditions and covenants contained in this Agreement, Conoco and DuPont agree as
follows:

Article I.        OPERATION OF PIPELINES

                  Conoco hereby agrees to operate and maintain the Pipelines and
                  to act on DuPont's behalf and/or at DuPont's direction
                  concerning movements of products through the Pipelines as
                  appropriate. The duties associated with operating the
                  Pipelines are listed in the attached Appendix B. It is agreed
                  by the Parties that the nature and scope of the duties to be
                  performed by Conoco in operating the Pipelines cannot be
                  completely listed as the Parties cannot foresee all possible
                  circumstances which might arise. Thus, it is agreed that
                  Conoco will exercise its best judgment, in consultation with
                  DuPont if possible, in the performance of the duties required
                  for safe and prudent pipeline operations not specifically
                  listed in Appendix B. 

                  Conoco shall exercise its reasonable judgment to operate and
                  maintain the Pipelines in a safe and prudent manner in
                  accordance with applicable governmental laws and regulations
                  and accepted industry standards and practices. 



Pipeline Operation Agreement                                             Page 1
<PAGE>   73

                  The Parties further agree to, from time to time, mutually
                  develop metrics for monitoring each other's performance under
                  this Agreement and particularly to aid in the early
                  identification and correction of problems that may arise
                  during the term of the Agreement.

Article II.       TITLE AND RISK OF LOSS

                  Title to product in the Pipelines and all risk of loss thereof
                  shall remain at all times with DuPont and shall not transfer
                  to Conoco; provided, however, DuPont shall remain liable to
                  Conoco for all fees, costs, and all other liabilities as set
                  forth in this Agreement, regardless of whether DuPont or
                  DuPont's customer has title to the Product.

Article III.      CONSIDERATION AND PAYMENT

                  Conoco may issue invoices to DuPont periodically. DuPont
                  agrees to remit payment to Conoco via wire transfer within
                  thirty (30) days of the date of any invoice for all undisputed
                  amounts for services under this Agreement. Conoco will invoice
                  DuPont for:

                  A.       "Direct Costs" which are all expenses, including
                           Capital Cost, incurred by Conoco as a direct result
                           of providing services under this Agreement. Direct
                           Costs are costs which are necessary in the
                           performance of Conoco's duties and are specific to a
                           certain Pipeline. Specific Direct Costs include, but
                           are not limited to, repair material, contract labor,
                           supervisory RTU repair costs, insurance, regulatory
                           assessments, and utilities for the Pipelines.

                  B.       "Allocated Costs" which are costs which are necessary
                           in the performance of Conoco's duties, but are not
                           specific to any certain Pipeline. Allocated Costs
                           include the wages, benefits, travel expenses,
                           training, safety equipment and other related employee
                           expenses for non-headquarters based employees that
                           provide services to the Pipelines. The determination
                           of the proper allocation of costs between the
                           Pipelines and other facilities and pipelines shall be
                           made solely by Conoco in good faith.

                  C.       "Overhead" is an amount added to Conoco's invoices to
                           DuPont to cover Conoco's expenses for its
                           Headquarters' operating and engineering staffs as
                           well as its supporting Legal, Right-of-Way,
                           Accounting, Risk Management, Tax, Computer, and other
                           administrative support groups as utilized in normal
                           day-to-day operations. Overhead shall be equal to
                           twenty-five percent (25%) of the Direct Costs and
                           Allocated Costs. Costs for engineering and other
                           support personnel assigned on a full-time basis to
                           specific 


Pipeline Operation Agreement                                             Page 2
<PAGE>   74

                           major projects on the Pipelines will be charged to
                           those projects directly.

                  D.       "Profit" shall be an amount added to Conoco's
                           invoices to DuPont representing the profit Conoco
                           would expect to make had its personnel been assigned
                           to other Conoco activities. Profit shall be
                           calculated as the average after tax operating income
                           (ATOI) per employee (based on the previous year's
                           annual report) times the number of annual man years
                           used to provide the pipeline operation services. At
                           the outset, the profit factor is one hundred thousand
                           dollars ($100,000) per man year. The profit factor
                           shall be adjusted on the anniversary of the Effective
                           Date each year during the term of this Agreement.

Article IV.       CAPITAL COSTS

                  Projects requiring capital expenditures ("Capital Costs") will
                  be approved by DuPont, except in emergencies. Conoco will
                  supervise, construct, approve and make payment of individual
                  invoices for said projects, and DuPont will provide adequate
                  financial prepayments to Conoco based upon projected forecasts
                  of capital expenditures.

Article V.        ACCOUNTING AND AUDIT

                  Conoco will maintain accurate accounts and supporting
                  documentation, in accordance with the Generally Accepted
                  Accounting Principles and Practices, of all costs, expenses
                  and liabilities incurred in servicing, repairing, maintaining,
                  and administering the Pipelines for a period of at least five
                  years. Each month Conoco will transmit to DuPont a statement
                  showing the total charges under this Agreement for the account
                  of DuPont during the preceding calendar month. DuPont may at
                  its option and expense, inspect and audit the accounts of
                  Conoco for the most recent two calendar years relating to any
                  charges incurred by Conoco under this Agreement. Each audit
                  must be conducted during office hours and with at least
                  forty-eight (48) hours advance notice. If DuPont shall require
                  a second audit or inspection in any single year, DuPont shall
                  pay all of Conoco's costs, as determined in Conoco's
                  reasonable discretion, plus any other costs associated with
                  such second audit or inspection.

Article VI.       TERM OF AGREEMENT

         A.       This agreement will remain in effect for a period of twenty
                  (20) years from the Effective Date, and will continue
                  thereafter until cancelled by either 


Pipeline Operation Agreement                                             Page 3
<PAGE>   75

                  Party upon six months' prior written notice or upon mutual
                  agreement of the Parties.

         B.       DuPont shall have the right to terminate this Agreement
                  without cause with one year's written notification to Conoco.

         C.       If DuPont assigns its entire interest in this Agreement to a
                  third party pursuant to such third party acquiring the DuPont
                  assets served by Conoco pursuant to Article IX.C, the
                  remaining term of this Agreement shall be reduced to one year
                  following the effective date of such assignment.

         D.       In addition, DuPont has certain rights under an Ethane Storage
                  and Throughput Agreement and an Ethylene Storage and
                  Throughput Agreement (both having the same effective date as
                  the Effective Date of this Agreement) ("Storage Agreement(s)")
                  to cause Conoco to meet or release a bonafide offer that
                  DuPont has obtained from a third party for storage and
                  throughput services. If Conoco elects to terminate the
                  obligations of the Parties under a first, chronologically, of
                  the above Storage Agreements pursuant to a meet or release
                  demand, Conoco shall thereby acquire the right to terminate,
                  concurrently with the termination of the storage services
                  provided under the first Storage Agreement, its obligations to
                  provide services under this Agreement for the operation of the
                  particular Pipeline listed in Appendix A that is most closely
                  associated with the stored product under the first Storage
                  Agreement. Further, if Conoco elects to terminate the
                  obligations of the Parties under a second, chronologically, of
                  the above Storage Agreements (meaning that Conoco will have
                  released DuPont from both Storage Agreements) pursuant to a
                  meet or release demand, Conoco shall thereby acquire the right
                  to terminate, concurrently with the termination of the storage
                  services provided under the second Storage Agreement, its
                  obligations to provide services under this Agreement for the
                  operation of all of the Pipelines, whether or not Conoco
                  elected to terminate services for any pipeline at the
                  termination of the first Storage Agreement.

Article VII.      LIABILITIES, INDEMNITIES, CLAIMS

         A.       Express Negligence Disclosure. UNLESS THIS AGREEMENT EXPRESSLY
                  PROVIDES TO THE CONTRARY, THE INDEMNITY, RELEASE AND WAIVER
                  PROVISIONS SET FORTH IN THIS AGREEMENT APPLY REGARDLESS OF
                  WHETHER THE INDEMNIFIED PARTY (OR ITS EMPLOYEES, AGENTS,
                  CONTRACTORS, SUCCESSORS OR ASSIGNS) CAUSES, IN WHOLE OR IN
                  PART, INDEMNIFIED CLAIMS ARISING OUT OF OR RESULTING, IN WHOLE
                  OR IN PART, FROM, OUT OF, OR IN 



Pipeline Operation Agreement                                             Page 4
<PAGE>   76

                  CONNECTION WITH, THE STORAGE OR HANDLING OF DUPONT'S PRODUCT
                  OR THE OPERATIONS OF CONOCO'S STORAGE FACILITY OR THE
                  INDEMNIFIED PARTY'S (OR ITS REPRESENTATIVES', CONTRACTORS',
                  SUCCESSORS', OR ASSIGNS') SOLE, JOINT, COMPARATIVE OR
                  CONCURRENT NEGLIGENCE, STRICT LIABILITY OR FAULT. DUPONT AND
                  CONOCO ACKNOWLEDGE THAT THIS STATEMENT COMPLIES WITH THE
                  EXPRESS NEGLIGENCE RULE AND IS CONSPICUOUS.

         B.       Conoco shall indemnify and hold DuPont harmless from any loss
                  or liability (including legal fees and expenses) arising from
                  any claim or cause of action for injury to or death of any
                  Conoco employee.

         C.       DuPont shall indemnify and hold Conoco harmless from any loss
                  or liability (including legal fees and expenses) arising from
                  any claim or cause of action for injury to or death of any
                  DuPont employee.

         D.       Conoco shall, to the extent permitted by law, fully indemnify,
                  defend and hold harmless, DuPont, with respect to any and all
                  claims, losses, damages, fines, debts, cost, expenses, and
                  penalties, liabilities, causes of action, including without
                  limitation, settlement costs and any reasonable legal or other
                  expenses paid to a third party for investigating or defending
                  any actions or threatened actions, (herein collectively
                  referred to as "Losses"), to the extent such Losses are
                  incurred by DuPont arising out of or as a result of any
                  negligence, willful misconduct, breach of contract or
                  violations of law or regulation by Conoco, its employees,
                  agents, subcontractors or assigns in the performance of
                  services provided pursuant to this Agreement. The Losses
                  covered under this paragraph, unless provided for in
                  paragraphs B and C above, include, without limitation, Losses
                  from actual or alleged (1) injury to or death of any person,
                  including agents, subcontractors and assigns of DuPont, (2)
                  loss of or damage to property including, without limitation,
                  property of DuPont and (3) damage to the environment.

         E.       DuPont shall, to the extent permitted by law, fully indemnify,
                  defend and hold harmless, Conoco, with respect to any and all
                  claims, losses, damages, fines, debts, cost, expenses, and
                  penalties, liabilities, causes of action, including without
                  limitation, settlement costs and any reasonable legal or other
                  expenses paid to a third party for investigating or defending
                  any actions or threatened actions, (herein collectively
                  referred to as "Losses"), to the extent such Losses are
                  incurred by Conoco arising out of or a result of any
                  negligence, willful misconduct, breach of contract or
                  violations of law or regulation by DuPont, its employees,
                  agents, subcontractors or assigns in the performance of
                  services provided pursuant to this Agreement. The Losses
                  covered under this paragraph, unless provided for in
                  paragraphs 



Pipeline Operation Agreement                                             Page 5
<PAGE>   77

                  B and C above, include, without limitation, Losses from actual
                  or alleged (1) injury to or death of any person, including
                  agents, subcontractors and assigns of Conoco, (2) loss of or
                  damage to property including, without limitation, property of
                  Conoco and (3) damage to the environment.

         F.       Joint Responsibility. In circumstances that both Parties are
                  in some measure responsible for Losses as described in
                  Paragraphs D and E above, the Parties shall indemnify the
                  other to the extent of its proportional share of its
                  responsibility of such Losses.

         G.       Waiver of Consequential and Punitive Damages. NOTWITHSTANDING
                  ANYTHING TO THE CONTRARY CONTAINED IN THIS AGREEMENT OR AT LAW
                  OR IN EQUITY, IN NO EVENT SHALL CONOCO BE LIABLE FOR PUNITIVE,
                  SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES (INCLUDING WITHOUT
                  LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS, BUSINESS
                  INTERRUPTION OR ANY OTHER LOSS) ARISING FROM OR RELATING TO
                  ANY CLAIM MADE UNDER THIS AGREEMENT OR REGARDING THE PROVISION
                  OF OR THE FAILURE TO PROVIDE THE STORAGE AND THROUGHPUT
                  SERVICES HEREUNDER, EVEN IF CONOCO HAS BEEN ADVISED OF THE
                  POSSIBILITY OF SUCH DAMAGES.

         H.       Exclusive Remedy. The terms and provisions of this Article VII
                  shall be the sole and exclusive remedy of each of the Parties
                  indemnified hereunder with respect to the transactions
                  contemplated in this Agreement.

         I.       Notice of Claims. Notice of claims for loss, damage, or
                  indemnity in connection with the services provided under this
                  Agreement must be made to Conoco in writing within ninety (90)
                  days after the same having become known to DuPont or should
                  have become known to DuPont. Such claims must be set forth in
                  specific detail and must be delivered to Conoco within the
                  ninety (90) day period and, unless so made and delivered to
                  Conoco, Conoco shall be wholly released and discharged
                  therefrom and shall not be liable therefore in any manner
                  whatsoever. Conoco shall use best efforts to respond timely to
                  any DuPont claim. No suit at law or in equity shall be
                  maintained upon any claim unless such claim is brought within
                  two (2) years of Conoco's refusal to accept such claim.

Article VIII.     FORCE MAJEURE

         A.       Force Majeure. Neither Party shall be liable to the other for
                  failure or delay in performance under this Agreement to the
                  extent that the failure or delay is due directly or indirectly
                  to Force Majeure, which is herein defined to 



Pipeline Operation Agreement                                             Page 6
<PAGE>   78

                  include without limitation, Acts of God or other causes beyond
                  the reasonable control of the Parties, war (whether declared
                  or not), fire, flood, lightning, hurricane or other storm,
                  earthquake, acts of public enemy, explosion, scheduling,
                  operational and maintenance restrictions, rebellion, riot,
                  insurrections, sabotage, invasion, accident, epidemic,
                  strikes, lockouts or other labor difficulties or industrial
                  disturbances, compliance with acts, rules, regulations, or
                  orders of federal, state, or local government, any agency
                  thereof or any other authority having or purporting to have
                  jurisdiction, mechanical failures or similar causes not due to
                  either Party's fault or negligence, official order or
                  industry-wide request, any inability to secure necessary parts
                  or materials, including the inability to secure materials by
                  reason of allocations promulgated by authorized governmental
                  agencies, or any other contingency beyond the control of the
                  affected Party which interferes with the performance
                  hereunder.

         B.       Suspension of Performance. Performance under this Agreement
                  shall be suspended (except for the payment of money due or to
                  become due for past performance hereunder) during the period
                  of such Force Majeure to the extent made necessary by the
                  Force Majeure; provided, the settlement of strikes, lockouts,
                  industrial disputes, or disturbances shall be entirely within
                  the discretion of the Party so settling to accede to the
                  demands of any opposing party when such course is inadvisable
                  in the discretion of the Party having the difficulty.

         C.       No Effect on Term. No curtailment, suspension, or acceptance
                  of performance pursuant to this Article VIII shall operate to
                  extend the term of, or to terminate, this Agreement.
                  Performance under this Agreement shall resume to the extent
                  made possible by the end or amelioration of the Force Majeure
                  event.

         D.       Notice. A Party claiming Force Majeure shall notify the other
                  Party immediately by telephone, E-mail and/or fax and confirm
                  the same in writing, giving reasonable detail regarding the
                  type of Force Majeure and its estimated duration.

Article IX.       MISCELLANEOUS PROVISIONS

         A.       Taxes. DuPont shall pay any and all lawful taxes, assessments,
                  or charges levied or assessed against DuPont's Product or
                  other assets including, but not limited to, any gross receipts
                  tax, use tax, sales tax and ad valorem tax. DuPont shall
                  immediately reimburse Conoco for any such taxes, assessments
                  or charges paid by Conoco on behalf of DuPont upon receipt of
                  notice of payment. Conoco shall pay all income-related taxes
                  and all 


Pipeline Operation Agreement                                             Page 7
<PAGE>   79

                  employee-related taxes and charges such as withholdings, FICA,
                  FICM, unemployment and other similar taxes.

         B.       Notice. All notices, demands, request and other communications
                  necessary to be given hereunder shall be in writing and deemed
                  given if personally delivered, forwarded by facsimile
                  transmission (with proof of transmission capability), or
                  mailed by either certified mail, return receipt requested, or
                  sent by recognized overnight carrier to the respective Party
                  at its address below:

                           If to Conoco:

                                    Conoco Inc.
                                    P.O. Box 2197
                                    Houston, Texas 77252-2197
                                    Attn: Director, Fractionation Services and 
                                          Logistics
                                    Telephone: (281) 293-1198
                                    Facsimile: (281) 293-5990

                           If to DuPont and related to:

                                    Pricing and contract issues:

                                            DuPont Sourcing
                                            P.O. Box 80022
                                            Wilmington, DE  19880-0022
                                            Attn:  Sourcing Manager
                                            Telephone: (302) 992-6085
                                            Facsimile: (302) 992-3966

                                    Legal issues:

                                            DuPont Legal
                                            1007 Market Street
                                            Wilmington, DE  19898
                                            Attn: Logistics and Commerce Counsel
                                            Telephone: (302) 774-1539
                                            Facsimile: (302) 774-4812



Pipeline Operation Agreement                                             Page 8
<PAGE>   80


                         Operations, Day to Day issues:

                              DuPont Packaging and Industrial
                              Polymers
                              1007 Market Street
                              Wilmington, DE  19898
                              Attn:  Manager, Contract
                                     Manufacturing
                              Telephone: (302) 774-6105
                              Facsimile: (302) 774-2005

         C.       Assignment. Neither Party shall assign any portion of its
                  rights or obligations under this Agreement without the prior
                  written consent of the other, which consent shall not be
                  unreasonably withheld; provided however, either Party may
                  assign this Agreement to a parent corporation, or any
                  subsidiary or affiliate with respect to which it holds at
                  least fifty-one percent (51%) of the voting stock, without the
                  consent of the other Party; provided further, the original
                  Parties to this Agreement shall remain primarily obligated
                  hereunder. This Agreement shall be binding upon and inure to
                  the benefit of the Parties hereto, their successors and
                  assigns and nothing contained in this Agreement, express or
                  implied, is intended to confer upon any other person or entity
                  any benefits, rights, or remedies. Notwithstanding the
                  foregoing, DuPont shall have the right to freely assign its
                  entire interest in this Agreement to a third party pursuant to
                  such third party acquiring DuPont assets that are served by
                  Conoco under this Agreement.

         D.       Rules and Regulations. This Agreement and the provisions
                  hereof shall be subject to, and the Parties agree to comply
                  with, all applicable local, state, and federal laws and to all
                  applicable rules, regulations, orders and directives of any
                  governmental authority, agency, commission, or regulatory body
                  in connection with any and all matters or things under or
                  incident to this Agreement. The Parties warrant to one another
                  that they comply with all applicable laws, rules, orders, and
                  regulations of governmental authority covering the production,
                  sale and delivery of the goods or services specified herein,
                  including, but not limited to, the Equal Opportunity Clause
                  prescribed in 41 CFR 60-1.4; the Affirmative Action Clause
                  prescribed in 41 CFR 60-250.4, regarding disabled veterans and
                  veterans of the Vietnam Era; the Affirmative Action Clause for
                  Handicapped Workers prescribed in 41 CFR 60-741.4; 48 CFR
                  Chapter 1 Subpart 19.7 regarding Small Business and Small
                  Disadvantaged Business Concerns; 48 CFR Chapter 1 Subpart 20.3
                  regarding Utilization of Labor Surplus Area Concerns;
                  Executive Order 12138 and regulations thereunder regarding
                  subcontracts to women-owned business concerns; Affirmative
                  Action Compliance Program (41 CFR 60-1.40); annually file
                  SF-100 



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<PAGE>   81

                  Employer Information Report (41 CFR 60-1.7); 41 CFR 60-1.8
                  prohibiting segregated facilities; and the Fair Labor
                  Standards Act of 1938, as amended.

         E.       Governing Law, Waiver of Jury Trial and Consent to
                  Jurisdiction. THIS AGREEMENT SHALL BE GOVERNED, CONSTRUED, AND
                  ENFORCED IN ACCORDANCE WITH THE LAWS OF THE STATE OF DELAWARE
                  IRRESPECTIVE OF THE RESIDENCE, PLACE OF BUSINESS, OR DOMICILE
                  OF THE PARTIES HERETO OR PLACE OF EXECUTION BY ANY PARTY
                  HERETO, AND NOTWITHSTANDING ANY CONFLICT OF LAWS PROVISIONS TO
                  THE CONTRARY. THIS AGREEMENT SHALL NOT BE GOVERNED BY THE U.
                  N. CONVENTION ON CONTRACTS FOR THE INTERNATIONAL SALE OF
                  GOODS. IN ADDITION, EACH PARTY HEREBY (a) WAIVES ANY AND ALL
                  RIGHTS IT MAY HAVE TO A JURY TRIAL IN CONNECTION WITH ANY
                  MATTER OR RIGHT ARISING UNDER THIS AGREEMENT OR RELATING TO
                  THE TRANSITIONAL SERVICES, (b) CONSENTS TO THE EXCLUSIVE
                  JURISDICTION OF ANY STATE OR FEDERAL COURT WITHIN THE STATE OF
                  DELAWARE AND IRREVOCABLY AGREES THAT ALL ACTIONS OR
                  PROCEEDINGS ARISING UNDER OR RELATING TO THIS AGREEMENT OR THE
                  TRANSITIONAL SERVICES SHALL BE LITIGATED IN ANY SUCH COURT,
                  AND (c) WAIVES ANY OBJECTION WHICH IT MAY HAVE BASED UPON
                  IMPROPER VENUE OR FORUM NON CONVENIENS TO THE CONDUCT OF ANY
                  PROCEEDINGS IN ANY SUCH COURT.

         F.       Alternative Dispute Resolution.

                  1.       Both Parties understand and appreciate that their
                           long term mutual interests will be best served by
                           affecting a rapid and fair resolution of any claims
                           or disputes which may arise out of this Agreement.
                           Therefore, both Parties agree to use their best
                           efforts to resolve all such disputes as rapidly as
                           possible on a fair and equitable basis. Toward this
                           end both Parties agree to develop and follow a
                           process for presenting, rapidly assessing, and
                           settling claims and other disputes on a fair and
                           equitable basis.

                  2.       If any dispute or claim arising under this Agreement
                           cannot be readily resolved by the Parties pursuant to
                           Paragraph F.1 above, the Parties agree to refer the
                           matter to a panel consisting of one (1) senior
                           executive from each Party for review and resolution.
                           The senior executive shall not have been directly
                           involved in the claim or dispute. A copy of the
                           Agreement, relevant facts, areas of 



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<PAGE>   82

                           disagreement, and concise summary of the basis for
                           each side's contentions will be provided to both
                           executives who shall review the same, confer, and
                           attempt to reach a mutual resolution of the issue.
                           The senior executives shall attempt to meet and
                           resolve the dispute within thirty (30) days of their
                           appointment.

                  3.       If the dispute cannot be resolved, under the process
                           set forth in Paragraph F.2 above, within ten (10)
                           days from the date of the panel's conference, the
                           Parties agree to attempt to resolve the dispute or
                           claim through non-binding mediation. The Parties
                           shall select a single qualified Mediator,
                           knowledgeable in the pertinent industry, who is not
                           presently affiliated with or related to either Party.
                           The Mediator shall hold a hearing (not to exceed one
                           (1) day) as soon as practicable after his appointment
                           (but not later than thirty (30) days after his
                           appointment) during which each Party shall present
                           its version of the matter, supported, if desired, by
                           a brief statement of the issue(s), sworn, written
                           testimony, relevant documents, its assessment of
                           damages, and its argument. The Parties shall provide
                           the Mediator with copies of all such materials as
                           well as any documents provided to their senior
                           executives under Paragraph F.2 at least ten (10) days
                           prior to the scheduled date of the mediation hearing.
                           The Parties may also provide the Mediator with copies
                           of any laws or regulations which they feel are
                           relevant to the dispute. A copy of the Contract will
                           be provided to the Mediator. Formal written
                           arguments, legal memoranda, and live testimony are
                           discouraged but may be permitted at the discretion of
                           the Mediator. Both Parties agree to make any relevant
                           and involved employees or documents available to the
                           other Party for its review and use in preparing its
                           position under this clause without the need for
                           subpoena or other court order.

                  4.       The Mediator, within ten (10) days of the completion
                           of the hearing, will meet separately with both
                           Parties and provide each of them, on a confidential
                           basis, with his/her written views of the strengths
                           and weaknesses of their respective positions. The
                           Parties will then reconvene and, with the assistance
                           of the Mediator, attempt to resolve the matter. If
                           resolution cannot be achieved by the Parties within
                           forty-eight (48) hours of this second meeting, the
                           Mediator will, within ten (10) additional days, issue
                           a written, non-binding decision on the issue.

                  5.       Each Party shall, within five (5) days of the
                           Mediator's written decision, notify the other in
                           writing whether it will accept or reject 



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<PAGE>   83

                           that decision. If the matter has not been resolved
                           utilizing the processes set forth in this clause and
                           the Parties are unwilling to accept the non-binding
                           decision of the Mediator, either or both Parties may
                           elect to pursue resolution through litigation.

                  6.       The selected Mediator shall execute a confidentiality
                           agreement, satisfactory to all Parties, prior to
                           his/her active participation in the mediation. The
                           costs of the Mediator shall be shared equally by the
                           Parties. Each Party will bear its own costs of
                           mediation.

                  7.       If the Parties cannot agree upon a choice of a
                           Mediator within ten (10) days of the date of the
                           panel's conference pursuant to Paragraph F.2, either
                           or both Parties may elect to directly pursue
                           litigation.

                  8.       All statements, correspondence, memoranda, briefs,
                           decisions, testimony, communications, and materials,
                           whether written or oral, submitted to or generated by
                           the panel and/or Mediator in connection with the
                           processes set forth above shall be deemed to be in
                           furtherance of settlement negotiations and shall be
                           privileged and shielded from production and
                           disclosure in any subsequent litigation.
                           Notwithstanding the foregoing, documents prepared in
                           the normal course of business, such as invoices,
                           shall be subject to discovery in subsequent
                           litigation in accordance with applicable law.

         G.       Hazards. EACH PARTY ACKNOWLEDGES THAT THERE ARE HAZARDS
                  ASSOCIATED WITH THE TRANSPORTATION AND USE OF PRODUCT, THAT IT
                  UNDERSTANDS SUCH HAZARDS, AND THAT IT IS ITS OWN
                  RESPONSIBILITY TO WARN AND PROTECT ITS EMPLOYEES AND OTHERS
                  WHO MAY BE EXPOSED TO SUCH HAZARDS IN CONNECTION WITH ITS
                  RESPONSIBILITIES AND OBLIGATIONS CONCERNING THE STORAGE AND
                  USE OF THIS PRODUCT CONTEMPLATED BY THIS AGREEMENT.

         H.       Headings. Headings used in this Agreement are for convenience
                  of the Parties only, and shall not be taken into account in
                  construing or interpreting this Agreement.

         I.       Entire Agreement. This Agreement contains the entire Agreement
                  and understanding of the Parties with respect to the matters
                  contained herein and there are no promises, assurances, terms,
                  conditions, or obligations, whether by precedent or otherwise,
                  other than those contained herein. This Agreement cancels and
                  supercedes any agreement covering the operation and or
                  maintenance of the Pipelines or any other agreement incident
                  thereto previously executed by the parties.



Pipeline Operation Agreement                                            Page 12
<PAGE>   84

         J.       Amendment. This Agreement shall not be amended or modified
                  except by written instrument executed by duly authorized
                  representatives of the respective Parties.

         K.       Counterparts. This Agreement may be executed in counterparts,
                  each of which shall constitute on original and all of which
                  shall constitute one document.

         L.       Waivers. No waiver of the provisions hereof shall be effective
                  unless in writing and signed by the Party to be charged with
                  such waiver. No waiver shall be deemed a continuing waiver or
                  waiver in respect to any subsequent breach or default, either
                  of a similar or dissimilar nature, unless expressly so stated
                  in writing.

         M.       Confidentiality. Neither Conoco nor DuPont shall disclose any
                  term or condition of this Agreement without the prior written
                  consent of the other Party, which consent will not be
                  unreasonably withheld. In the event of the termination of this
                  Agreement, Conoco and DuPont shall, to the extent permitted by
                  law, keep confidential and not use any confidential
                  information obtained pursuant to this Agreement, unless prior
                  written consent is obtained or such information is readily
                  ascertainable from public or published information or trade
                  sources or is received by a Party from a third party having no
                  obligation of confidentiality with respect to such
                  information.

         N.       Conoco Authority to Act for DuPont. The Parties agree that
                  Conoco's authority to act on behalf of DuPont or expend (or
                  commit to expend) monies for DuPont shall be restricted as
                  follows: 

                  1)     Authorization to make improvements and/or capital
                         investments shall be the responsibility of DuPont. Once
                         authorized by DuPont, Conoco may expend or cause to be
                         expended capital dollars on behalf of or for DuPont's
                         account.

                  2)     In emergency situations, Conoco may make commitments to
                         expend up to $500,000 without the prior approval of
                         DuPont.

         O.       Default. In the event either Party to this Agreement shall
                  default in the performance of any obligations specified, the
                  nondefaulting Party shall notify the other Party in writing,
                  and if such default is not remedied with reasonable
                  promptness, then the nondefaulting Party shall have the right
                  to terminate this Contract immediately. Termination under this
                  Article, or under any other Article of this Contract, shall
                  not relieve or release either Party from any liability which
                  accrued prior to the date of such termination.



Pipeline Operation Agreement                                            Page 13
<PAGE>   85

         P.       CHEMTREC. The Parties agree to use CHEMTREC to report any
                  chemical emergency relating to any product under this
                  Agreement.

         Q.       Safety. The Parties are vitally interested in safety and in
                  the safe practices of all activities covered under this
                  Agreement. Thus, Parties agree to maintain mutually agreeable
                  safety standards for activities covered under this Agreement
                  which are no less stringent than safety standards which are in
                  effect at the Effective Date. In addition to endeavoring to
                  maintain high safety standards, the Parties agree that its
                  employees, contractors, subcontractors and agents shall
                  respect and abide by the other Party's plant and site safety
                  rules when the one Party has personnel on the other Party's
                  plant or site.

         R.       Independent Contractor. It is understood that employees,
                  methods, facilities, and equipment of Conoco shall at all
                  times be under its exclusive direction and control. Conoco's
                  relationship to DuPont shall be that of an independent
                  contractor. Nothing in the Contract shall be construed to
                  constitute Conoco, or any of its employees, as an agent,
                  associate, joint venturer, or partner of DuPont. However,
                  DuPont may from time to time appoint, in writing, Conoco to
                  act as an agent for limited purposes.

         S.       Minority Vendors. The Parties agree to provide maximum
                  practicable utilization of Minority subcontractors and vendors
                  among its sources of supply in the performance of this
                  Contract. Minorities include but are not limited to Black
                  Americans, Hispanic Americans, Native Americans, Asian Pacific
                  Americans, and Native Hawaiian Organizations. A Minority
                  business is at least fifty-one percent (51%) owned by a
                  Minority or group of Minorities and has its management and
                  daily business controlled by one (1) or more such individuals.
                  Conoco shall report to DuPont on a quarterly basis the dollar
                  amounts paid by Conoco during the previous quarter to minority
                  subcontractors and vendors for goods and services used in the
                  performance of this Agreement.

         T.       Year 2000 Compliance.

                  1.       Each Party covenants and agrees that it will not
                           permit a Year 2000 Problem to computer systems,
                           software or equipment owned, leased or licensed by
                           it, its affiliates or subsidiaries to interfere with
                           its performance under this Agreement. Each Party
                           further agrees to request from those of its suppliers
                           whose performance may materially affect that Party's
                           performance hereunder, that each such supplier
                           undertake the same obligation with respect to such
                           material performance. The Parties will use reasonable
                           commercial efforts to cooperate and share information
                           to further comply with this Article, 



Pipeline Operation Agreement                                            Page 14
<PAGE>   86

                           and to minimize the impact of Year 2000 Problems on
                           performance of this Agreement. Each Party will inform
                           the other Party of any circumstance indicating a
                           possible obstacle to such compliance, and the steps
                           being taken to avoid or overcome the obstacle.

                  2.       Provided a Party complies with Paragraph T.1 above,
                           such Party will not be liable to the other Party
                           hereto for any failure to perform obligations under
                           this Agreement to the extent such failure to perform
                           arises from a Year 2000 Problem a) affecting one of
                           the non-performing Party's suppliers or b) beyond
                           that Party's reasonable control (e.g. a Year 2000
                           Problem affecting a governmental entity). IN
                           PARTICULAR SUCH NON-PERFORMING PARTY SHALL HAVE NO
                           LIABILITY FOR ANY DAMAGES, INCLUDING DIRECT,
                           INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL,
                           PUNITIVE OR EXEMPLARY DAMAGES.

                  3.       A "Year 2000 Problem" means a date handling problem
                           relating to the Year 2000 date change that would
                           cause a computer system, software or equipment to
                           fail to correctly perform, process and handle date
                           related data for the dates within and between the
                           twentieth and twenty-first centuries and all other
                           centuries.

         U.       Continuous Improvement. The Parties will meet from time to
                  time, preferably at least once per year, to consider potential
                  operating cost saving measures that may be employed in the
                  performance of services rendered under this Agreement. The
                  Parties agree that, to the extent that operating cost savings
                  are achieved, each Party will share with the other, on a 50/50
                  basis, the benefits of any cost savings realized for the
                  remainder of the term.

         V.       Controlled Substance Abuse. The Parties agree that the use,
                  possession, manufacture, dispensing, sale and distribution of
                  alcohol, drugs, and other controlled substances on their
                  respective premises and on or in vehicles and equipment used
                  for the purposes of this Agreement shall be prohibited. In
                  addition, the Parties shall prohibit from their property the
                  presence of any individual having a controlled substance in
                  his/her body for non-medical reasons. The Parties shall
                  develop a mutually agreeable Controlled Substance Abuse
                  policy, including drug testing, which is at least as rigorous
                  as Conoco's current policy and complies with DOT's policy
                  relating to pipeline operations.


Pipeline Operation Agreement                                            Page 15
<PAGE>   87

IN WITNESS WHEREOF, the Parties hereto have caused this Agreement to be executed
on the day indicated.

                    Conoco Inc.

                    By:
                        -------------------------------------

                    Title:
                          -----------------------------------

                    Date:
                          -----------------------------------




                    E. I. du Pont de Nemours and Company

                    By:
                        -------------------------------------

                    Title:
                          -----------------------------------

                    Date:
                          -----------------------------------



Pipeline Operation Agreement                                            Page 16

<PAGE>   1
                                                                  EXHIBIT NO. 15

Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D.C. 20549

Ladies and Gentlemen:

         We are aware that Conoco has included our report dated September 28,
1998 (issued pursuant to the provisions of Statement on Auditing Standards No.
71) in the Prospectus constituting part of its Amendment 3 to the Registration
Statement on Form S-1 (No. 333-60119) to be filed on or about September 28,
1998. In addition, we are aware that Conoco has included our report dated
September 28, 1998 on the pro forma combined balance sheet as of June 30, 1998
and the pro forma combined statements of income for the six-month periods ended
June 30, 1997 and 1998 in the same Registration Statement on Form S-1. We are
also aware of our responsibilities under the Securities Act of 1933.

Yours very truly,



/s/ PricewaterhouseCoopers LLP
- ------------------------------
PRICEWATERHOUSECOOPERS LLP

Houston, Texas
September 28, 1998

<PAGE>   1
                                                                    EXHIBIT 21.1


                                   CONOCO INC.
                        (FORMERLY CONOCO ENERGY COMPANY)
                         PROPOSED CORPORATE STRUCTURING*
                                 AT DATE OF IPO


<TABLE>
<CAPTION>
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
             COMPANY NAME                     INCORPORATION      OWNERSHIP                  DIRECT PARENT/EQUITY OWNER
                                                LOCATION         PERCENTAGE
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
<S>                                       <C>                        <C>       <C>                     
362084 Alberta Inc.                       Alberta                    100%      Conoco Canada Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Alliance Energy Services                  Kentucky                    50%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Associated Petroleum Terminals 
  (Immingham) Limited                     England                     33%      Conoco Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Atlantic Energy Inc.                      Virginia                    50%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Big Sky of Montana Realty, Inc.           Delaware                  8.33%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Brandywine Industrial Gas, Inc.           Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Britannia Operator Limited                England                     50%      Conoco (U.K.) Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Calcasieu Shipping Corporation            Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Cardinal  States Gathering Co.            Virginia                    50%      Pocahontas Gas Partnership
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
CFJ Properties                            Delaware                    15%      Kayo Oil Company
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Ceska Rafinerska AS                       Czech Republic              17%      Conoco Inc. (formerly Conoco Energy Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Cit-Con Oil Corporation                   Delaware                    35%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
C&L Processors                            Texas                       50%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Clearwater Ltd.                           Bermuda                    100%      Danube Insurance Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Cliffe Storage Limited                    England                     50%      Conoco Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Colonial Pipeline Company                 Delaware                  7.55%      Conoco Pipe Line Company
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Comap, Inc.                               Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conch International Methane Limited       Bahama Islands              40%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Cono-Services Inc.                        Colorado                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco (Glen) Limited                     England                    100%      Conoco (U.K.) Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco  (Thailand) Co., Ltd.              Thailand                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco (U.K.) Limited                     England                    100%      DuPont Conoco Energy (US), Inc.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco A.G.                               Switzerland                100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Arctic Inc.                        Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Asia Ltd.                          Bermuda                    100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Asia Pacific Ltd.                  Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Asia Pacific Sdn. Bhd.             Malaysia                   100%      Conoco Inc. (formerly Conoco Energy Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
</TABLE>

*Proposed Corporate Structure Inclusive of Equity Interests
Page 1
<PAGE>   2
<TABLE>
<CAPTION>
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
             COMPANY NAME                     INCORPORATION      OWNERSHIP                  DIRECT PARENT/EQUITY OWNER
                                                LOCATION         PERCENTAGE
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
<S>                                       <C>                        <C>       <C>                     
Conoco Aviation                           Delaware                   100%      To be determined (Conoco Petroleum Operations Inc. 
                                                                                 or Conoco Inc., formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Baltic Inc.                        Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Barbados B.V.                      Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Barbados Ltd.                      Bermuda                    100%      Danube Insurance Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Bardawil Inc.                      Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Canada Limited                     New Brunswick              100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Carbon and Minerals, Inc.          Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Central Europe Inc.                Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Chile Inc.                         Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Colombia Ltd.                      Bermuda                    100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Communications, Inc.               Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Coral Inc.                         Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Denmark Inc.                       Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Development Company                Delaware                   100%      Conoco Inc. (formerly Conoco Energy Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Development II Inc.                Delaware                   100%      Conoco Inc. (formerly Conoco Energy Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Development Limited                England                    100%      Conoco Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Drilling Inc.                      Delaware                   100%      Conoco Inc. (formerly Conoco Energy Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Egypt Inc.                         Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Inc. (formerly Conoco Energy 
  Company)                                Delaware                   100%      Du Pont Energy Company
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Energy Holdings Ltd.               Bermuda                    100%      Clearwater Ltd.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Energy Nigeria Limited             Nigeria                    100%      Conoco Energy Holdings Ltd.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Enterprises Inc.                   Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Equity Investments Inc.            Delaware                   100%      Conoco Inc. (formerly Conoco Energy Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Este Pipeline Company              Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco EurAsia Inc.                       Delaware                   100%      Conoco Inc. (formerly Conoco Energy Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Europe Gas Company                 Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Europe Gas Limited                 England                    100%      Conoco (U.K.) Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Exploration & Production B.V.      Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Exploration and Production 
  Nigeria Limited                         Nigeria                    100%      Clearwater Ltd.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Exploration Production Europe 
  Limited                                 England                    100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Finance Services Inc.              Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Frontier Ltd.                      Bermuda                    100%      Clearwater Ltd.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Geisum Inc.                        Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Global Energy Company              Delaware                   100%      Conoco Inc. (formerly Conoco Energy Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
</TABLE>


*Proposed Corporate Structure Inclusive of Equity Interests
Page 2
<PAGE>   3
<TABLE>
<CAPTION>
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
             COMPANY NAME                     INCORPORATION      OWNERSHIP                  DIRECT PARENT/EQUITY OWNER
                                                LOCATION         PERCENTAGE
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
<S>                                       <C>                        <C>       <C>                     
Conoco Global Power de Mexico             Mexico                     100%      Conoco Global Energy Company
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Global Power (U.K.) Limited        England                    100%      Conoco (U.K.) Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Global Power Assets Inc.           Delaware                   100%      Conoco Inc. (formerly Conoco Energy Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Global Power Developments Inc.     Delaware                   100%      Conoco Inc. (formerly Conoco Energy Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Global Power Inc.                  Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Hungary K.F.T.                     Hungary                    100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Inc. (formerly Continental Oil 
  Company)                                Delaware                   100%      Conoco Inc. (formerly Conoco Energy Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Indonesia Inc.                     Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco International Gas Corporation      Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco International Petroleum Company    Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco International, Inc.                Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Investments Norge A/S              Norway                     100%      Conoco Norway Inc.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Iran N.V.                          Antilles                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Iraq Ltd.                          Bermuda                     25%      Danube Insurance Company
                                                                      75%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Jet Finland Oy                     Finland                    100%      Conoco Petroleum Operations Inc.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Jet (Malaysia ) Sdn. Bhd.          Malaysia                   100%      Conoco Inc. (formerly Conoco Energy Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Jet Retail Development, spol, 
  s.r.o.                                  Slovak Republic            100%      Conoco-Jet s.r.o
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Khazar Ltd.                        Bermuda                     99%      Danube Insurance Company
                                                                       1%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Kuwait Services Inc.               Delaware                   100%      Conoco Inc. (formerly Conoco Energy Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Lagia Offshore, Inc.               Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Leasing Limited                    England                    100%      Conoco Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Limited                            England                    100%      Conoco (U.K.) Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Mekong Ltd.                        Bermuda                    100%      Danube Insurance Company
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Mexico Ltd.                        Bermuda                     25%      Danube Insurance Company
                                                                      75%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Mexico, S.A. de C.V.               Mexico                      99%      Conoco Petroleum Operations Inc.
                                                                       1%      Conoco Specialty Products Inc.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Mexico Servicios, S.A. de C.V.     Mexico                      99%      Conoco Petroleum Operations Inc.
                                                                       1%      Conoco Specialty Products Inc.
- ----------------------------------------- ---------------------- -------------- ----------------------------------------------------
Conoco Mid-Continent Properties Inc.      Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Middle East Gas Co. N.V.           Antilles                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Middle East Ltd.                   Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Mineraloel GmbH                    Germany                    100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
</TABLE>


*Proposed Corporate Structure Inclusive of Equity Interests
Page 3
<PAGE>   4
<TABLE>
<CAPTION>
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
             COMPANY NAME                     INCORPORATION      OWNERSHIP                  DIRECT PARENT/EQUITY OWNER
                                                LOCATION         PERCENTAGE
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
<S>                                       <C>                        <C>       <C>                     
Conoco Mont Belvieu Holdings Inc.         Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco North Sea B.V.                     Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Northland Ltd.                     Bermuda                    100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Norway Inc.                        Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Norway Properties Inc.             Delaware                   100%      Conoco Inc. (formerly Conoco Energy Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco NW Natuna Exploration and 
  Production Ltd.                         Bermuda                    100%      Danube Insurance Company
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Offshore Inc.                      Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Offshore Pipe Line Company         Delaware                   100%      Conoco Pipe Line Company
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Offshore Properties Inc.           Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Oil & Gas Associates L.P.          Delaware                 17.26%      Conoco Offshore Properties Inc.
                                                                   20.65%      Conoco Permian Basin Properties Inc.
                                                                    2.37%      Conoco Norway Properties Inc.
                                                                   32.87%      Vanguard Energy Investors L.P.
                                                                    5.37%      Conoco U.K. Properties Inc.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Operations (QLD) Pty Ltd.          Australia                  100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Oriente Ltd.                       Bermuda                     25%      Danube Insurance Company
                                                                      75%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Orinoco Inc.                       Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Overseas Oil Company               Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Pakistan Exploration & 
  Production B.V.                         Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Pension Plans Trustees Limited     England                    100%      Conoco  (U.K.) Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Permian Basin Properties Inc.      Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Peru Ltd.                          Bermuda                     25%      Danube Insurance Company
                                                                      75%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Petcoke Far East Ltd.              Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Petroleum Limited                  England                    100%      Conoco Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Petroleum Norge AS                 Norway                     100%      Conoco Norway Inc.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Petroleum Operations Inc.          Delaware                   100%      Conoco Inc. (formerly Conoco Energy Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Pipe Line Company                  Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Services Ltd.                      Bermuda                    100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Services Sdn. Bhd.                 Malaysia                   100%      Conoco Inc. (formerly Conoco Energy Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Shale Oil Inc.                     Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Shipping Company                   Liberia                    100%      World Wide Transport Inc.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Shipping Norge AS                  Norway                      80%      Norske Conoco A/S
                                                                      20%      Conoco Norway Inc.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
</TABLE>


*Proposed Corporate Structure Inclusive of Equity Interests
Page 4
<PAGE>   5
<TABLE>
<CAPTION>
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
             COMPANY NAME                     INCORPORATION      OWNERSHIP                  DIRECT PARENT/EQUITY OWNER
                                                LOCATION         PERCENTAGE
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
<S>                                       <C>                        <C>       <C>                     
Conoco South Sokang Natuna B.V.           Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Specialty Products Inc.            Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Specialty Products Limited         England                    100%      Conoco Petroleum Operations Inc.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Syria Ltd.                         Bermuda                    100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Taiwan Exploration & 
  Production B.V.                         Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Timan-Pechora Ltd.                 Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Trading Inc.                       Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Treasury Ltd.                      England                    100%      Conoco (U.K.) Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Trinidad (4a) B.V.                 Netherlands                100%      Conoco Resources Holding B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Trinidad (4b) B.V.                 Netherlands                100%      Conoco Resources Holding B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Trinidad Inc.                      Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco (U.K.) Limited                     England                    100%      New Conoco
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco U.K. Properties Inc.               Delaware                   100%      Conoco Inc. (formerly Conoco Energy Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Venezuela B.V.                     Netherlands                100%      Conoco Resources Holding B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Venezuela Ltd.                     Bermuda                     25%      Danube Insurance Limited
                                                                      75%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Venezuela Services B.V.            Netherlands                100%      Conoco Resources Holding B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Vietnam Exploration & 
  Production B.V.                         Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco Warim B.V.                         Netherlands                100%      Du Pont Services B.V
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco West Firan Inc.                    Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco West Natuna B.V.                   Netherlands                100%      Du Pont Services B.V
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco-Austria Mineraloel GmbH            Austria                    100%      Conoco Mineraloel GmbH
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Conoco-Jet s.r.o.                         Slovak Republic            100%      Conoco Inc. (formerly Conoco Energy Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Continental Europe Energy Company         Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Continental Mid Delta Petroleum Company   Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Continental Netherlands Oil 
  Company B.V.                            Netherlands                100%      Du Pont Services B.V
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Continental Oil Company                   Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Continental Oil Company 
  (Nederland) B.V.                        Netherlands                100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Continental Oil Company Inc.              Canada                     100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Continental Oil Company Limited           England                    100%      Conoco (U.K.) Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Continental Oil Company of Iran           Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Continental Oil Company of Italy          Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Continental Oil Company of Libya          Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Continental Oil Company of Niger          Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Continental Oil Company of Nigeria        Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
</TABLE>


*Proposed Corporate Structure Inclusive of Equity Interests
Page 5
<PAGE>   6
<TABLE>
<CAPTION>
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
             COMPANY NAME                     INCORPORATION      OWNERSHIP                  DIRECT PARENT/EQUITY OWNER
                                                LOCATION         PERCENTAGE
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
<S>                                       <C>                        <C>       <C>                     
Continental Pipe Line Company             Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Continental Oil S.A.                      Spain                       50%      Societe Europeenne Des Carburants  (SECA)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Crude Oil Terminals (Humber) Limited      England                   33.3%      Conoco Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Danube Insurance Limited                  Bermuda                     73%      Conoco A.G.
                                                                      27%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Deepwater Drilling L.L.C.                 Delaware                    50%      Conoco Development Company
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Deepwater Drilling II L.L.C.              Delaware                    40%      Conoco Development II Inc.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Deutsche Transalpine Oelleitung GmbH      Germany                      3%      Conoco Mineraloel GmbH
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Dixie Pipeline Company                    Delaware                  8.38%      Conoco Pipe Line Company
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Douglas Oil Company of California         California                 100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Douglas Stations, Inc.                    Delaware                   100%      Douglas Oil Company of California
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 1 B.V.                    Netherlands                100%      Du Pont Services B.V
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 2 B.V.                    Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 4 B.V.                    Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 5 B.V.                    Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 6 B.V.                    Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 7 B.V.                    Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 8 B.V.                    Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 9 B.V.                    Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 10 B.V.                   Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 11 B.V.                   Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 12 B.V.                   Netherlands                100%      Conoco Resources Holding B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 13 B.V.                   Netherlands                100%      Conoco Resources Holding B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 15 B.V.                   Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 16 B.V.                   Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 20 B.V.                   Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 21 B.V.                   Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 30 B.V.                   Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 31 B.V.                   Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 33 B.V.                   Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 34 B.V.                   Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 35 B.V.                   Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 36 B.V.                   Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
</TABLE>


*Proposed Corporate Structure Inclusive of Equity Interests
Page 6
<PAGE>   7
<TABLE>
<CAPTION>
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
             COMPANY NAME                     INCORPORATION      OWNERSHIP                  DIRECT PARENT/EQUITY OWNER
                                                LOCATION         PERCENTAGE
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
<S>                                       <C>                        <C>       <C>                     
Du Pont E&P No. 37 B.V.                   Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 38 B.V.                   Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 39 B.V.                   Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 40 B.V.                   Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 41 B.V.                   Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 42 B.V.                   Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 43 B.V.                   Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 44 B.V.                   Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont E&P No. 45 B.V.                   Netherlands                100%      Du Pont Services B.V.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont Investments Limited               England                    100%      Conoco (U.K.) Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont Jet Danmark A/S                   Denmark                    100%      Conoco Denmark Inc.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Dubai Marketing Company Ltd.              Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Dubai Petroleum Company                   Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
DuPont Conoco Energy Services Company     Delaware                   100%      Conoco Inc. (formerly Conoco Energy Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
DuPont Conoco Nordic AB                   Sweden                   88.39%      Conoco A.G.
                                                                   11.61%      To be determined (Conoco Petroleum Operations Inc. 
                                                                                 or Conoco Inc., formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Du Pont Conoco Poland Sp.z.o.o.           Poland                     100%      To be determined (Conoco Petroleum Operations Inc. 
                                                                                 or Conoco Inc., formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
DuPont Conoco Services Company            Delaware                   100%      Conoco Inc. (formerly Conoco Energy Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
DuPont Conoco U.K. Holding Limited        England                    100%      Du Pont Conoco Energy (US), Inc.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
DuPont Jet A/S                            Norway                     100%      Conoco Norway Inc.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
DuPont Power Marketing Inc.               Delaware                   100%      Conoco Inc. (formerly Conoco Energy Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Enertech S.A.                             Belgium                    100%      Societe Europeenne Des Carburants (SECA)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Etanor DA                                 Norway                    1.66       Norske Conoco A/S
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Excel Paralubes                           Delaware                    50%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Excel Paralubes Funding Corporation       Delaware                   100%      Excel Paralubes
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Explorer Pipeline Company                 Delaware                  7.71%      Conoco Pipe Line Company
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
F.P.S.O. Development Ltd.                 Bermuda                    100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Fas-Gas Retail Services Co. of Texas      Texas                      100%      Kayo Oil Company
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Felix Oil Company                         California                   6%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Frontier Deepwater Drilling Inc.          Delaware                   100%      Conoco Inc. (formerly Conoco Energy Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
GKG Mineraloelhndl GmbH                   Germany                     50%      Conoco Mineraloel GmbH
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
</TABLE>


*Proposed Corporate Structure Inclusive of Equity Interests
Page 7
<PAGE>   8
<TABLE>
<CAPTION>
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
             COMPANY NAME                     INCORPORATION      OWNERSHIP                  DIRECT PARENT/EQUITY OWNER
                                                LOCATION         PERCENTAGE
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
<S>                                       <C>                        <C>       <C>                     
Glen Petroleum Inc.                       England                    100%      Conoco (U.K.) Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Glen Petroleum Limited                    England                    100%      Conoco (U.K.) Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Gulf Coast Fractionators                  Texas                     22.5%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Heartland Pipeline Company                Delaware                    50%      Conoco Pipe Line Company
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Horizon Energy Marketing, LLC             Louisiana                   50%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Humber LPG Terminal Limited               England                     40%      Conoco Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Humber Oil Terminals Trustee Limited      England                   33.3%      Conoco Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Hydroserve Westlake, L.L.C.               Delaware                    50%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Ingleside Cogeneration Limited 
  Partnership                             Delaware                    49%      Conoco Global Power Assets, Inc.
                                                                       1%      Conoco Global Power Developments Inc.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Interconnector (UK) Ltd.                  England                     10%      Conoco (U.K.) Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Interkraft Handel GmbH                    Germany                    100%      Conoco Mineraloel GmbH
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Iranian Oil Participants Limited          England                  0.416%      San Jacinto Eastern Corp.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Iranian Oil Services (Holding) Limited    England                  0.416%      San Jacinto Eastern Corp.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Jet Petroleum Limited                     England                    100%      Conoco Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Jet Tankstellen-Betriebs GmbH             Germany                    100%      Conoco Mineraloel GmbH
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Jet/Jiffy Shops Limited                   Thailand                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Jiffy Limited                             England                    100%      Conoco (U.K.) Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Jolliet Pipe Line Company                 Delaware                    38%      Conoco Pipe Line Company
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Jupiter Holdings, Inc.                    Delaware                    50%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Jupiter Chemicals, Inc.                   Delaware                   100%      Jupiter Holdings, Inc.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Jupiter Sulphur, Inc.                     Delaware                   100%      Jupiter Holdings, Inc.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Kayo Oil Company                          Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
K.C. Asphalt, L.L.C.                      Colorado                    50%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Kettleman North Dome Association          California                 100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Lake Charles Pipe Line Company            Delaware                    50%      Conoco Pipe Line Company
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Lobo Pipeline Company                     Delaware                   100%      Conoco Inc. (formerly Conoco Energy Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Longhorn Pipeline Company                 Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Louisiana Gas System Inc.                 Delaware                   100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Malaysia Refining Company Sdn. Bhd.       Malaysia                    40%      Conoco Asia Ltd.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Merielectrica I S.A.                      Colombia                    35%      Conoco Global Energy Company
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Merielectrica I S.A. & Cia.               Colombia                    35%      Conoco Global Energy Company
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Mineraloelraffinerie Oberrhein GmbH       Germany                   18.75%     Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Nelson Industrial Steam Company           Texas                      36.1%     Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
New Conoco                                England                     100%     Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
</TABLE>


*Proposed Corporate Structure Inclusive of Equity Interests
Page 8
<PAGE>   9
<TABLE>
<CAPTION>
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
             COMPANY NAME                     INCORPORATION      OWNERSHIP                  DIRECT PARENT/EQUITY OWNER
                                                LOCATION         PERCENTAGE
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
<S>                                       <C>                        <C>       <C>                     
Norske Conoco A/S                         Norway                      100%      Conoco Norway Inc. (Norway Branch)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Oberrheinische Mineraloelwerke GmbH       Germany                      25%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
OK Coop AG                                Switzerland                  49%      Conoco A.G.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Pars Investment Corporation  (Iranian 
  Investment Corp.)                       Iran                      0.416       San Jacinto Eastern Corporation
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Penreco                                   Texas                      39.2%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Pentland Aviation Fuelling Services 
  Limited                                 England                      50%      Conoco Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Petco Enterprises, Ltd.                   Japan                        51%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Petrex S.A.                               Belgium                     100%      Societe Europeenne Des Carburants (SECA)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Petrocokes, Ltd.                          Japan                        20%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Petroleum Storage Ltd.                    England                      50%      Conoco Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Petrozuata C.A.                           Venezuela                  50.1%      Conoco Orinoco Inc.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Phoenix Park Gas Processors, Ltd.         Trinidad                     41%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Pioneer Investments Corp.                 Delaware                     55%      Conoco Pipe Line Company
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Pioneer Pipe Line Company                 Delaware                     55%      Pioneer Investments Corp.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Pocahontas Gas Partnership                Virginia                     50%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Polar Lights Company                      Russia                       50%      Conoco Timan-Pechora Ltd.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Projet Malaysia Sdn. Bhd.                 Malaysia                     98%      Conoco Jet (Malaysia) Sdn. Bhd.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Razorback Pipeline Company                Delaware                     40%      Conoco Pipe Line Company
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Ronany Limited                            Northern Ireland            100%      Conoco Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Salt Lake Terminal Co.                    Delaware                     55%      Pioneer Investments Corp.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
San Jacinto Eastern Corp.                 Delaware                    100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
San Jacinto Service Company               Delaware                    100%      San Jacinto Eastern Corp.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
S.E.C.Q.                                  Belgium                     100%      Societe Europeenne Des Carburants (SECA)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Sentinel Concessions, Inc.                Texas                        49%      Kayo Oil Company
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Siam Conoco Land Ltd.                     Thailand                     30%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Siam Conoco Terminal Co., Ltd.            Thailand                     30%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Sime Conoco Energy Sdn. Bhd.              Malaysia                     49%      Conoco Jet (Malaysia) Sdn. Bhd.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Societa Italiana Per L'Oleodotto 
  Transalpino S.p.A.                      Italy                         3%      Conoco A.G.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Societe Europeenne Des Carburants 
  (SECA)                                  Belgium                     100%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Statoil Methanol A/S                      Norway                   18.125%      Conoco Norway Inc.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Syria Gas Developments Ltd.               Bermuda                     100%      Conoco Syria Ltd.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Tabas Petrolculuk A.S.                    Turkey                       25%      Conoco Petroleum Operations Inc.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
TCH LLC                                   Partnership                  25%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
The Standard Shale Products Company       Colorado                 99.318%      Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Tjeldbergodden Luftfabrikk                Norway                    11.88%      Conoco Norway Inc.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
</TABLE>
           
                             

*Proposed Corporate Structure Inclusive of Equity Interests
Page 9


 
<PAGE>   10
<TABLE>
<CAPTION>
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
             COMPANY NAME                     INCORPORATION      OWNERSHIP                  DIRECT PARENT/EQUITY OWNER
                                                LOCATION         PERCENTAGE
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
<S>                                       <C>                        <C>       <C>                     
TLC International LDC                     Cayman Islands             35%       Conoco Global Energy Company
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Transalpine Oelleitung in Oesterreich 
  Gesellschaft M.B.H.                     Austria                     3%       Conoco A.G.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Vanguard Energy Investors L.P.            Delaware                   10%       Conoco Equity Investments Inc.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Venture Coke Company                      Partnership                50%       Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Warwickshire Oil Storage Limited          England                  33.3%       Conoco Limited
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
World Wide Transport, Inc.                Liberia                   100%       Conoco A.G.
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Yellowstone Pipe Line Company             Delaware                   46%       Conoco Pipe Line Company
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
Zeller & CIE                              France                     50%       Conoco Inc. (formerly Continental Oil Company)
- ----------------------------------------- ---------------------- ------------- ----------------------------------------------------
</TABLE>



*Proposed Corporate Structure Inclusive of Equity Interests
Page 10

<PAGE>   1
                                                                    EXHIBIT 23.1



                       CONSENT OF INDEPENDENT ACCOUNTANTS

   
We hereby consent to the use in the Prospectus constituting part of this
Amendment No. 3 to the Registration Statement on Form S-1 (No. 333-60119) of our
reports dated July 24, 1998 and September 28, 1998 relating to the combined
financial statements and the pro forma combined statement of income,
respectively of Conoco, which appear in such Prospectus. We also consent to the
references to us under the headings "Experts" and "Selected Historical and Pro
Forma Financial Information" in such Prospectus. However, it should be noted
that PricewaterhouseCoopers LLP has not prepared or certified such "Selected
Historical and Pro Forma Financial Information."
    




/s/ PricewaterhouseCoopers LLP
- ------------------------------
PRICEWATERHOUSECOOPERS LLP

Houston, Texas
   
September 28, 1998
    

<PAGE>   1
                                                                    Exhibit 23.2
                            DeGolyer and MacNaughton
                               One Energy Square
                              Dallas, Texas 75206
                                 July 28, 1998


Conoco Inc.
600 North Dairy Ashford
Houston, Texas 77001-6651

Gentlemen:

     In connection with the Registration Statement on Form S-1 (the Registration
Statement), to be filed with the Securities and Exchange Commission on or about
July 29, 1998, by Conoco Inc. (Conoco), DeGolyer and MacNaughton (the firm)
hereby consents to the inclusion in the Registration Statement as Annex A to the
Prospectus contained therein of the firm's summary letter report dated July 20,
1998, relating to a comparison of estimates prepared by the firm with those
furnished by Conoco of the proved oil, condensate, natural gas liquids, and
natural gas reserves, as of December 31, 1997, of certain properties owned by
Conoco. We further consent to references to the firm under the captions
"PROSPECTUS SUMMARY--Summary Reserve Data," "BUSINESS--Upstream--Oil and Natural
Gas Reserves," and "EXPERTS" in the Prospectus included in the Registration
Statement.


                                                    Very truly yours,

                                                    /s/ DeGOLYER and MacNAUGHTON
                                                    ----------------------------
                                                    DeGOLYER and MacNAUGHTON
                                                    

<PAGE>   1
 
   
                                                                    EXHIBIT 99.1
    
 
   
                         CONSENT OF SOLOMON ASSOCIATES
    
 
   
     We hereby consent to the use in the Prospectus of Conoco Inc. constituting
part of this Amendment No. 3 to the Registration Statement on Form S-1 (No.
333-60119) of our reports relating to the performance of Conoco's European
refineries which appear in such Prospectus. We also consent to the references to
us under the headings "Downstream" and "Europe-Refining" and reference to us as
"an independent benchmarking company."
    
 
   
Solomon Associates
    
   
September 24, 1998
    


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