BURLINGTON RESOURCES INC
424B2, 1999-03-01
CRUDE PETROLEUM & NATURAL GAS
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<PAGE>   1
                                                 File Pursuant to Rule 424(b)(2)
                                                 Registration No. 333-52213

 
THE INFORMATION IN THIS PROSPECTUS SUPPLEMENT IS NOT COMPLETE AND MAY BE
CHANGED. THIS PROSPECTUS SUPPLEMENT AND THE ACCOMPANYING PROSPECTUS IS
NOT AN OFFER TO SELL THESE SECURITIES AND WE ARE NOT SOLICITING AN OFFER TO BUY
THESE SECURITIES IN ANY STATE WHERE THE OFFER OR SALE IS NOT PERMITTED.
 
PROSPECTUS SUPPLEMENT  (Subject to Completion, Issued February 26, 1999)
(To Prospectus dated May 19, 1998)
 
                          $
                           Burlington Resources Inc.
                             % DEBENTURES DUE 2029
                            ------------------------
                  Interest payable on March   and September
 
                            ------------------------
 
 THE COMPANY MAY REDEEM AT ANY TIME, IN WHOLE OR IN PART, THE DEBENTURES AT THE
                       REDEMPTION PRICE DESCRIBED HEREIN.
 
                            ------------------------
 
                    PRICE    % AND ACCRUED INTEREST, IF ANY
 
                            ------------------------
 
<TABLE>
<CAPTION>
                                                                   UNDERWRITING
                                       PRICE TO                   DISCOUNTS AND                PROCEEDS TO
                                        PUBLIC                     COMMISSIONS                   COMPANY
                                       --------                   -------------                -----------
<S>                          <C>                           <C>                           <C>
Per Debenture..............               %                             %                           %
Total......................               $                             $                           $
</TABLE>
 
                            ------------------------
 
The Securities and Exchange Commission and state securities regulators have not
approved or disapproved these securities or determined if this Prospectus
Supplement or the accompanying Prospectus is truthful or complete. Any
representation to the contrary is a criminal offense.
 
Morgan Stanley & Co. Incorporated expects to deliver the Debentures to
purchasers on March   , 1999.
 
                            ------------------------
 
MORGAN STANLEY DEAN WITTER
        CHASE SECURITIES INC.
                NATIONSBANC MONTGOMERY SECURITIES LLC
                        SALOMON SMITH BARNEY
 
March   , 1999
<PAGE>   2
 
     These offering materials consist of two documents: (a) this Prospectus
Supplement, which describes the terms of the Debentures that we are currently
offering, and (b) the accompanying Prospectus, which provides general
information about our debt securities, some of which may not apply to the
Debentures that we are currently offering. The information in this Prospectus
Supplement supersedes any inconsistent information included in the accompanying
Prospectus.
 
     In various places in this Prospectus supplement and the accompanying
Prospectus, we refer you to other sections of such documents for additional
information by indicating the caption heading of such other sections. The page
on which each principal caption included in this Prospectus Supplement and the
accompanying Prospectus can be found is listed in the Table of Contents below.
All such cross references in this Prospectus Supplement are to captions
contained in this Prospectus Supplement and not in the accompanying Prospectus,
unless otherwise stated.
 
                            ------------------------
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                              PAGE
                                                              ----
<S>                                                           <C>
                      PROSPECTUS SUPPLEMENT
Use of Proceeds.............................................   S-3
Capitalization..............................................   S-3
Selected Financial Data.....................................   S-4
Certain Terms of the Debentures.............................   S-5
Underwriters................................................   S-8
Legal Matters...............................................   S-8
                            PROSPECTUS
Available Information.......................................     2
Incorporation of Certain Documents by Reference.............     3
The Company.................................................     4
The Burlington Resources Trusts.............................     4
Use of Proceeds.............................................     5
Ratio of Earnings to Fixed Charges..........................     5
Description of Debt Securities..............................     5
Description of Capital Stock................................    13
Description of the Trust Preferred Securities and Trust
  Guarantees................................................    17
Plan of Distribution........................................    20
Legal Matters...............................................    21
Experts.....................................................    21
</TABLE>
 
                            ------------------------
 
     You should read this Prospectus Supplement along with the Prospectus that
follows. You should rely only on the information provided or incorporated by
reference in this Prospectus Supplement and the Prospectus. We have not
authorized anyone else to provide you with different information. We are not
making an offer of the Debentures in any state where the offer is not permitted.
You should not assume that the information in this Prospectus Supplement or the
Prospectus is accurate as of any date other than the dates on the front of these
documents. In this Prospectus Supplement and the accompanying Prospectus, "we,"
"us" and "our" refer to Burlington Resources Inc. (the "Company").
 
                                       S-2
<PAGE>   3
 
                                USE OF PROCEEDS
 
     The net proceeds from the sale of the Debentures offered hereby are
estimated to be approximately $          . All of such net proceeds (after
expenses estimated at $          ) will be used for general corporate purposes,
including working capital increases, capital expenditures, acquisitions and
reducing indebtedness. Such indebtedness includes commercial paper, $300,000,000
aggregate principal amount of 7.15% notes maturing in May 1999 and $150,000,000
aggregate principal amount of 6.875% notes maturing in August 1999. As of
December 31, 1998, the weighted average interest rate on all outstanding
commercial paper borrowings of the Company was 5.86% per annum with maturities
varying from 1 to 20 days. If we do not use the net proceeds immediately, we
will temporarily invest them in short-term, interest-bearing obligations.
 
                                 CAPITALIZATION
 
     The following table sets forth our consolidated capitalization as of
December 31, 1998, and as adjusted to reflect the issuance of the Debentures and
the repayment of $191,310,000 of commercial paper outstanding on December 31,
1998. This table should be read in conjunction with the consolidated financial
statements and the notes thereto incorporated by reference in this Prospectus
Supplement.
 
<TABLE>
<CAPTION>
                                                               DECEMBER 31, 1998
                                                              --------------------
                                                              ACTUAL   AS ADJUSTED
                                                              ------   -----------
                                                                 (IN MILLIONS)
<S>                                                           <C>      <C>
Long-term Debt..............................................  $1,938     $
                                                              ------     ------
Stockholders' Equity(a):
  Common Stock, $.01 par value, 325,000,000 shares
     authorized; 202,795,635 shares issued..................       2          2
Paid-in Capital.............................................   2,984      2,984
Retained Earnings...........................................   1,039      1,039
Cost of Treasury Stock (25,420,562 shares)..................   1,007      1,007
                                                              ------     ------
Total Stockholders' Equity..................................   3,018      3,018
                                                              ------     ------
          Total Capitalization..............................  $4,956     $
                                                              ======     ======
</TABLE>
 
- ---------------
 
(a) We have authority to issue 75,000,000 shares of $.01 par value preferred
    stock, of which 3,250,000 have been designated as Series A Junior
    Participating Preferred Stock. As of December 31, 1998, no shares of
    preferred stock were issued.
 
                                       S-3
<PAGE>   4
 
                            SELECTED FINANCIAL DATA
 
     The selected financial data set forth below for the periods indicated
should be read in conjunction with the consolidated financial statements and the
notes thereto contained in documents incorporated by reference in this
Prospectus Supplement.
 
<TABLE>
<CAPTION>
                                                                  YEAR ENDED DECEMBER 31,
                                                         ------------------------------------------
                                                          1998     1997     1996     1995     1994
                                                         ------   ------   ------   ------   ------
                                                          (IN MILLIONS, EXCEPT PER SHARE AMOUNTS)
<S>                                                      <C>      <C>      <C>      <C>      <C>
INCOME STATEMENT DATA:
  Revenues.............................................  $1,637   $2,000   $2,200   $1,734   $1,871
  Operating Income (Loss)..............................     218      503      580     (397)    (159)
  Net Income (Loss)....................................      86      319      335     (261)     (73)
  Earnings (Loss) per Common Share:
     Basic.............................................     .48     1.80     1.89    (1.47)    (.41)
     Diluted...........................................     .48     1.79     1.88    (1.47)    (.41)
  Ratio of Earnings to Fixed Charges(a)................    1.48x    3.48x    3.48x      --       --
BALANCE SHEET DATA:
  Total Assets.........................................  $5,917   $5,821   $5,683   $5,608   $6,285
  Long-term Debt.......................................   1,938    1,748    1,853    2,042    2,049
  Stockholders' Equity.................................   3,018    3,016    2,808    2,591    2,920
  Cash Dividends Declared per Common Share(b)..........     .55      .46      .44      .44      .58
</TABLE>
 
- ---------------
 
(a) Total earnings available for fixed charges in 1995 and 1994 were inadequate
    to cover total fixed charges in the amount of approximately $567 million and
    $274 million, respectively. Total earnings available for fixed charges in
    1995 were inadequate to cover total fixed charges primarily as a result of
    the impairment of oil and gas assets related to the adoption of Statement of
    Financial Accounting Standard No. 121 ($490 million pretax, $304 million
    after tax). Total earnings available for fixed charges in 1994 were
    inadequate to cover total fixed charges primarily as a result of a change in
    the method of assessing the impairment of long-lived assets ($319 million
    pretax, $210 million after tax).
 
    For purposes of calculating the ratio of earnings to fixed charges, earnings
    represent pretax income from continuing operations available for fixed
    charges, less equity in undistributed earnings of 20-50% owned companies,
    together with a portion of rent under long-term operating leases
    representative of an interest factor. Fixed charges represent interest
    expense, capitalized interest and a portion of rent under long-term
    operating leases representative of an interest factor.
 
(b) Cash Dividends Declared per Common Share was calculated based upon
    historical cash dividends paid by the Company and The Louisiana Land and
    Exploration Company divided by outstanding shares for years 1994 through
    1997. This calculation resulted from the 1997 merger of the two companies
    that was accounted for as a pooling of interests. In 1998, Cash Dividends
    Declared per Common Share was based on the Company's annual dividend rate of
    $.55 per common share.
 
                                       S-4
<PAGE>   5
 
                        CERTAIN TERMS OF THE DEBENTURES
 
     The following description of the particular terms of the Debentures
supplements the description of the general terms and provisions of the Debt
Securities set forth under the heading "Description of Debt Securities" in the
accompanying Prospectus. If a particular term is inconsistent with the more
general term described in the Prospectus, the particular term replaces the more
general term.
 
GENERAL
 
     We will issue the Debentures under an indenture dated April 1, 1992 between
the Company and the Trustee, Citibank, N.A.
 
     The Debentures will be limited to $   million aggregate principal amount
and will mature on March   , 2029. The Debentures will bear interest from March
  , 1999 at the rate per annum of      %, payable semiannually on March   and
September   of each year, commencing September   , 1999, to the persons in whose
names such Debentures are registered, subject to certain exceptions, at the
close of business on February      or August      , as the case may be, next
preceding such interest payment date.
 
     The Debentures have no sinking fund provisions.
 
OPTIONAL REDEMPTION
 
     We may redeem all or a portion of the Debentures at any time as set forth
below. We will mail notice to registered holders of the Debentures of our intent
to redeem on not less than 30 nor more than 60 days' notice. We may redeem the
Debentures at a redemption price equal to the greater of:
 
     - 100% of the principal amount plus accrued interest to the redemption
       date; or
 
     - the sum of the present values of the remaining scheduled payments of
       principal and interest (exclusive of interest accrued to the date of
       redemption) discounted to the redemption date on a semiannual basis
       (assuming a 360-day year consisting of twelve 30-day months) at the
       Treasury Rate plus           basis points, plus accrued interest on the
       principal amount being redeemed to the redemption date.
 
     "Treasury Rate" means, with respect to any redemption date, (i) the yield,
under the heading which represents the average for the immediately preceding
week, appearing in the most recently published statistical release designated
"H.15(519)" or any successor publication which is published weekly by the Board
of Governors of the Federal Reserve System and which establishes yields on
actively traded United States Treasury securities adjusted to constant maturity
under the caption "Treasury Constant Maturities," for the maturity corresponding
to the Comparable Treasury Issue (if no maturity is within three months before
or after the Remaining Life, yields for the two published maturities most
closely corresponding to the Comparable Treasury Issue shall be determined and
the Treasury Rate shall be interpolated or extrapolated from such yields on a
straight line basis, rounding to the nearest month) or (ii) if such release (or
any successor release) is not published during the week preceding the
calculation date or does not contain such yields, the rate per annum equal to
the semiannual equivalent yield to maturity of the Comparable Treasury Issue,
calculated using a price for the Comparable Treasury Issue (expressed as a
percentage of its principal amount) equal to the Comparable Treasury Price for
such redemption date. The Treasury Rate shall be calculated on the third
Business Day preceding the redemption date.
 
     "Business Day" means any calendar day that is not a Saturday, Sunday or
legal holiday in New York, New York and on which commercial banks are open for
business in New York, New York.
 
     "Comparable Treasury Issue" means the United States Treasury security
selected by an Independent Investment Banker as having a maturity comparable to
the remaining term ("Remaining Life") of the Debentures to be redeemed that
would be utilized, at the time of selection and in accordance with customary
financial practice, in pricing new issues of corporate debt securities of
comparable maturity to the remaining term of the Debentures.
 
                                       S-5
<PAGE>   6
 
     "Comparable Treasury Price" means, with respect to any redemption date, (A)
the average of four Reference Treasury Dealer Quotations for such redemption
date, after excluding the highest and lowest such Reference Treasury Dealer
Quotations, or (B) if the Independent Investment Banker obtains fewer than four
such Reference Treasury Dealer Quotations, the average of all such Quotations.
 
     "Independent Investment Banker" means Morgan Stanley & Co. Incorporated or,
if such firm is unwilling or unable to select the Comparable Treasury Issue, an
independent investment banking institution of national standing appointed by the
Trustee.
 
     "Reference Treasury Dealer" means (i) each of Morgan Stanley & Co.
Incorporated, Chase Securities Inc., NationsBanc Montgomery Securities LLC and
Salomon Smith Barney Inc. and their respective successors, provided, however,
that if any of the foregoing shall cease to be a primary U.S. Government
securities dealer in New York City (a "Primary Treasury Dealer"), we will
substitute therefor another Primary Treasury Dealer and (ii) any other Primary
Treasury Dealer selected by us.
 
     "Reference Treasury Dealer Quotations" means, with respect to each
Reference Treasury Dealer and any redemption date, the average, as determined by
the Independent Investment Banker, of the bid and asked prices for the
Comparable Treasury Issue (expressed in each case as a percentage of its
principal amount) quoted in writing to the Independent Investment Banker by such
Reference Treasury Dealer at 5:00 p.m. on the third Business Day preceding such
redemption date.
 
BOOK-ENTRY ONLY FORM AND PROCEDURES
 
     We will issue the Debentures in book-entry only form, which means that they
will be represented by one or more permanent global certificates registered in
the name of The Depository Trust Company, New York, New York ("DTC"), or its
nominee. We will refer to this form here as "book-entry only."
 
     One or more global securities will be issued to DTC or its nominee. DTC
will keep a computerized record of its participants (for example, your broker)
whose clients have purchased the securities. The participant would then keep a
record of its clients who purchased the securities. A global security may not be
transferred, except that DTC, its nominees and their successors may transfer an
entire global security to one another.
 
     Under book-entry only, we will not issue certificates to individual holders
of the Debentures or register the ownership interests in the Debentures of such
individual holders. Beneficial interests in global securities will be shown on,
and transfers of interests in the global securities will be made only through,
the records maintained by DTC and its participants.
 
     DTC is a limited-purpose trust company organized under the New York Banking
Law, a "banking organization" under the New York Banking Law, a member of the
Federal Reserve System, a "clearing corporation" within the meaning of the New
York Uniform Commercial Code, and a "clearing agency" registered pursuant to the
provisions of Section 17A of the Securities Exchange Act of 1934, as amended.
DTC holds securities that its participants deposit with DTC. DTC also
facilitates the settlement among participants of securities transactions, such
as transfers and pledges, in deposited securities through electronic
computerized book-entry changes in participants' accounts. This eliminates the
need for physical movement of securities certificates.
 
     Securities brokers and dealers, banks, trust companies, clearing
corporations and certain other organizations are direct participants ("Direct
Participants"). DTC is owned by a number of its Direct Participants and by the
New York Stock Exchange, Inc., the American Stock Exchange, Inc. and the
National Association of Securities Dealers, Inc. Access to the DTC system is
also available to others such as securities brokers and dealers, banks and trust
companies that clear through or maintain a custodial relationship with a Direct
Participant, either directly or indirectly. The rules applicable to DTC and its
participants are on file with the Securities and Exchange Commission.
 
                                       S-6
<PAGE>   7
 
     Debentures represented by a global security would be exchangeable for
Debenture certificates with the same terms in authorized denominations only if:
 
          (i) DTC notifies us that it is unwilling or unable to continue as
     depository or if DTC ceases to be a clearing agency registered under
     applicable law; or
 
          (ii) we instruct the Trustee that the global security is now
     exchangeable; or
 
          (iii) an event of default has occurred and is continuing.
 
     The information in this section concerning DTC and DTC's book-entry system
has been obtained from sources that we believe to be reliable (including DTC),
but we take no responsibility for the accuracy thereof.
 
     Neither we, the Trustee nor the Underwriters will have any responsibility
or obligation to participants, or the persons for whom they act as nominees,
with respect to the accuracy of the records of DTC, its nominee or any
participant with respect to any ownership interest in the Debentures, or
payments to, or the providing of notice to participants or beneficial owners of
Debentures.
 
     The Debentures will trade in DTC's Same-day Funds Settlement System and
secondary market trading activity in the Debentures will, therefore, settle in
immediately available funds. All applicable payments of principal and interest
on the Debentures issued as a global security will be made by us in immediately
available funds.
 
     For other terms of the Debentures, see "Description of Debt Securities" in
the accompanying Prospectus.
 
                                       S-7
<PAGE>   8
 
                                  UNDERWRITERS
 
     The Underwriters named below have severally agreed to purchase, and we have
agreed to sell to them, the respective principal amount of the Debentures from
us according to the terms of an underwriting agreement dated March   , 1999 in
the following amounts set forth opposite their respective names below:
 
<TABLE>
<CAPTION>
                                                              PRINCIPAL AMOUNT OF
NAME                                                              DEBENTURES
- ----                                                          -------------------
<S>                                                           <C>
Morgan Stanley & Co. Incorporated...........................       $
Chase Securities Inc........................................
NationsBanc Montgomery Securities LLC.......................
Salomon Smith Barney Inc. ..................................
                                                                   --------
          Total.............................................       $
                                                                   ========
</TABLE>
 
     If all of the conditions under the underwriting agreement have been met,
the Underwriters will purchase all of the Debentures if any are purchased.
 
     The Underwriters will offer the Debentures to the public initially at the
offering price set forth on the cover page of this Prospectus Supplement. They
will also offer the Debentures to certain dealers at such prices less a
concession not in excess of   % of the principal amount of the Debentures. The
Underwriters may allow, and dealers may reallow, a concession not in excess of
  % of the principal amount of the Debentures on sales to certain other dealers.
After the initial public offering, the public offering price and concessions may
be changed by the Underwriters.
 
     The Debentures are a new issue of securities with no established trading
market, and will not be listed on any national securities exchange. The
Underwriters have advised us that they presently intend to act as market makers
for the Debentures. However, the Underwriters are not obligated to do so and may
discontinue any market making at any time without notice. No assurance can be
given as to the liquidity of the trading market for the Debentures.
 
     In order to facilitate the offering of the Debentures, the Underwriters may
engage in transactions that stabilize, maintain or otherwise affect the price of
the Debentures. Specifically, the Underwriters may overallot in connection with
the offering, creating a short position in the Debentures for their own account.
In addition, to cover overallotments or to stabilize the price of the
Debentures, the Underwriters may bid for, and purchase, the Debentures in the
open market. Finally, the underwriting syndicate may reclaim selling concessions
allowed to an underwriter or a dealer for distributed Debentures in transactions
to cover syndicate short positions, in stabilization transactions or otherwise.
Any of those activities may stabilize or maintain the market price of the
Debentures above independent market levels. The Underwriters are not required to
engage in these activities, and may end any of these activities at any time.
 
     We have agreed to indemnify the several Underwriters against certain
liabilities, including liabilities under the Securities Act of 1933, as amended.
 
     Certain of the Underwriters and their associates and affiliates engage in
transactions with and/or perform services, including investment banking and
general financing and banking services, for us and our affiliates in the
ordinary course of business.
 
                                 LEGAL MATTERS
 
     The validity of the Debentures will be passed upon for us by Cahill Gordon
& Reindel (a partnership including a professional corporation), New York, New
York, and for the Underwriters by Cravath, Swaine & Moore, New York, New York.
Kenneth W. Orce, a director of the Company, is a senior partner of Cahill Gordon
& Reindel and, as of February 8, 1999, owned 28,877 shares of Common Stock of
the Company, including 19,252 currently exercisable options, but excluding 3,000
shares owned by family trusts.
 
                                       S-8
<PAGE>   9
 
PROSPECTUS
 
                                 $1,000,000,000
 
                           BURLINGTON RESOURCES INC.
                                DEBT SECURITIES
                                  COMMON STOCK
                                PREFERRED STOCK
 
                         BURLINGTON RESOURCES CAPITAL I
                        BURLINGTON RESOURCES CAPITAL II
 
              TRUST PREFERRED SECURITIES FULLY AND UNCONDITIONALLY
                    GUARANTEED BY BURLINGTON RESOURCES INC.
 
    Burlington Resources Inc. (the "Company") may offer, from time to time, in
one or more series, its (i) unsecured senior debt securities (the "Senior Debt
Securities"), (ii) unsecured subordinated debt securities (the "Subordinated
Debt Securities" and, together with the Senior Debt Securities, the "Debt
Securities"), (iii) shares of its Common Stock, par value $.01 per share (the
"Common Stock") and (iv) shares of its Preferred Stock, par value $.01 per share
(the "Preferred Stock"). The Debt Securities, the Common Stock and the Preferred
Stock are collectively referred to herein as the "Company Securities."
Burlington Resources Capital I and Burlington Resources Capital II (each, a
"Burlington Resources Trust"), each a statutory business trust formed under
Delaware law, may offer, from time to time, preferred securities (the "Trust
Preferred Securities") with the payment of dividends and payments on liquidation
or redemption of the Trust Preferred Securities guaranteed on a subordinated
basis by the Company to the extent described herein and in an accompanying
prospectus supplement (the "Trust Guarantee"). The Company is the owner of the
trust interests represented by common securities (the "Trust Common Securities")
issued by each Burlington Resources Trust. Unless indicated otherwise in a
prospectus supplement, each Burlington Resources Trust exists for the sole
purpose of issuing its trust interests and investing the proceeds thereof in
Subordinated Debt Securities.
 
    The Company Securities and the Trust Preferred Securities are collectively
referred to as the "Securities" and will have a maximum aggregate offering price
of $1,000,000,000 (or the equivalent thereof in foreign currency or currency
units) and will be offered on terms to be determined by market conditions at the
time of sale.
 
    The Securities may be offered separately or together, in separate series, in
amounts and at prices and on terms to be set forth in an accompanying prospectus
supplement (a "Prospectus Supplement"). In addition, the specific terms of the
Securities in respect of which this Prospectus is being delivered, and whether
such Securities will be listed on a national securities exchange, will be set
forth in an accompanying Prospectus Supplement.
 
    The Senior Debt Securities, if issued, will rank equally and ratably with
all other unsecured and unsubordinated indebtedness of the Company, and the
Subordinated Debt Securities, if issued, will be unsecured and subordinated to
all present and future Senior Indebtedness (as such term will be defined in an
accompanying Prospectus Supplement) of the Company. See "Description of Debt
Securities."
                            ------------------------
 
    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.
                            ------------------------
 
    The Securities may be sold directly, through agents from time to time or
through underwriters and/or dealers. If any agent of the Company or the
Burlington Resources Trusts or any underwriter is involved in the sale of the
Securities, the name of such agent or underwriter and any applicable commission
or discount will be set forth in the accompanying Prospectus Supplement. See
"Plan of Distribution."
                            ------------------------
 
              THIS PROSPECTUS MAY NOT BE USED TO CONSUMMATE SALES
                     OF SECURITIES UNLESS ACCOMPANIED BY A
                             PROSPECTUS SUPPLEMENT.
                            ------------------------
 
May 19, 1998
<PAGE>   10
 
     No dealer, salesman, or any other person has been authorized to give any
information or to make any representations other than those contained or
incorporated by reference in this Prospectus or any applicable Prospectus
Supplement and, if given or made, such information or representations must not
be relied upon as having been authorized by the Company, the Burlington
Resources Trusts or any underwriter, dealer or agent. This Prospectus and any
applicable Prospectus Supplement do not constitute an offer to sell or a
solicitation of an offer to buy Securities offered hereby in any jurisdiction to
any person to whom it is unlawful to make such offer or solicitation in such
jurisdiction. Neither the delivery of this Prospectus or any Prospectus
Supplement nor any sale made hereunder shall under any circumstances create any
implication that there has been no change in the affairs of the Company or the
Burlington Resources Trusts since the date hereof or thereof.
                            ------------------------
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                               PAGE
                                                               ----
<S>                                                            <C>
Available Information.......................................     2
Incorporation of Certain Documents by Reference.............     3
The Company.................................................     4
The Burlington Resources Trusts.............................     4
Use of Proceeds.............................................     5
Ratio of Earnings to Fixed Charges..........................     5
Description of Debt Securities..............................     5
Description of Capital Stock................................    13
Description of the Trust Preferred Securities and Trust
  Guarantees................................................    17
Plan of Distribution........................................    20
Legal Matters...............................................    21
Experts.....................................................    21
</TABLE>
 
                            ------------------------
 
     CERTAIN PERSONS PARTICIPATING IN THE OFFERING MAY ENGAGE IN TRANSACTIONS
THAT STABILIZE, MAINTAIN OR OTHERWISE AFFECT THE PRICE OF THE SECURITIES.
SPECIFICALLY, THE UNDERWRITERS MAY OVERALLOT IN CONNECTION WITH THE OFFERING,
AND MAY BID FOR, AND PURCHASE, THE SECURITIES IN THE OPEN MARKET. FOR A
DESCRIPTION OF THESE ACTIVITIES, SEE "PLAN OF DISTRIBUTION."
                            ------------------------
 
                             AVAILABLE INFORMATION
 
     The Company is subject to the informational requirements of the Securities
Exchange Act of 1934 (the "Exchange Act") and in accordance therewith files
reports and other information with the Securities and Exchange Commission (the
"Commission") relating to its business, financial position, results of
operations and other matters. Such reports and other information can be
inspected and copied at the Public Reference Section maintained by the
Commission at Judiciary Plaza, 450 Fifth Street, N.W., Washington, D.C. 20549
and at its Regional Offices located at Northwestern Atrium Center, 500 West
Madison Street, Chicago, Illinois 60661, and 7 World Trade Center, 15th Floor,
New York, New York 10048. Copies of such material can also be obtained from the
Public Reference Section of the Commission at 450 Fifth Street, N.W.,
Washington, D.C. 20549, at prescribed rates. The Commission maintains a site on
the World Wide Web containing reports, proxy materials, information statements
and other items. The address is http://www.sec.gov. The Common Stock of the
Company is listed on the New York Stock Exchange and such material can also be
inspected at the office of such exchange at 20 Broad Street, New York, New York
10005.
 
     The Company and the Burlington Resources Trusts have filed with the
Commission a joint registration statement (the "Registration Statement") under
the Securities Act of 1933, as amended (the "Securities Act") with respect to
the Securities covered by this Prospectus. This Prospectus does not contain all
the information set forth in the Registration Statement, certain parts of which
are omitted in accordance with the
 
                                        2
<PAGE>   11
 
rules and regulations of the Commission. Reference is made to the Registration
Statement and to the exhibits relating thereto for further information with
respect to the Company, the Burlington Resources Trusts and the Securities
covered by this Prospectus.
 
     No separate financial statements of the Burlington Resources Trusts have
been included or incorporated by reference herein. Neither of the Burlington
Resources Trusts nor the Company considers such financial statements material to
holders of Trust Preferred Securities because (i) all of the voting securities
of each Burlington Resources Trust will be owned, directly or indirectly, by the
Company, a reporting company under the Exchange Act, (ii) neither Burlington
Resources Trust has independent operations but rather each exists for the
purpose of issuing securities representing undivided beneficial interests in the
assets of such Burlington Resources Trust and investing the proceeds thereof in
Subordinated Debt Securities, and (iii) the obligations of the Burlington
Resources Trusts under the Trust Preferred Securities are fully and
unconditionally guaranteed on a subordinated basis by the Company to the extent
set forth herein. See "The Burlington Resources Trusts" and "Description of the
Trust Preferred Securities and Trust Guarantees -- Trust Guarantees."
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
     The Company hereby incorporates by reference herein its (i) Annual Report
on Form 10-K for the fiscal year ended December 31, 1997; (ii) Quarterly Report
on Form 10-Q for the three-month period ended March 31, 1998; (iii) Proxy
Statement dated February 19, 1998; and (iv) Current Report on Form 8-K filed
with the Commission on January 5, 1998.
 
     A description of the Common Stock is incorporated by reference to the
Company's Rule 424(b) Prospectus, dated July 7, 1988. A description of the
Company's Rights Agreement is incorporated by reference to the Company's
Registration Statement on Form 8-A, as amended to date.
 
     All documents filed by the Company pursuant to Section 13(a), 13(c), 14 or
15(d) of the Exchange Act after the date of this Prospectus and before the
termination of the offering of the securities offered hereby shall be deemed
incorporated herein by reference, and such documents shall be deemed to be a
part hereof from the date of filing such documents. Any statement contained
herein or in a document incorporated or deemed to be incorporated by reference
herein shall be deemed to be modified or superseded for purposes of this
Prospectus to the extent that a statement contained herein or in any other
subsequently filed document which also is or is deemed to be incorporated by
reference herein modifies or supersedes such statement. Any such statement so
modified or superseded shall not be deemed, except as so modified or superseded,
to constitute a part of this Prospectus.
 
     The Company will provide without charge to each person to whom this
Prospectus is delivered, on the written or oral request of any such person, a
copy of any or all of the above documents incorporated herein by reference
(other than exhibits to such documents, unless such exhibits are specifically
incorporated by reference into the documents that this Prospectus incorporates).
Written or oral requests should be directed to: Wendi S. Zerwas, Corporate
Secretary, Burlington Resources Inc., 5051 Westheimer, Suite 1400, Houston,
Texas 77056, telephone: (713) 624-9500.
 
                                        3
<PAGE>   12
 
                                  THE COMPANY
 
     Burlington Resources Inc. ("BR") is a holding company engaged, through its
principal subsidiaries, Burlington Resources Oil & Gas Company and The Louisiana
Land and Exploration Company and their affiliated companies (collectively, the
"Company"), in the exploration, development, production and marketing of oil and
gas. The Company is the largest independent oil and gas company in the United
States based on total proved domestic reserves, and second largest U.S. based
independent oil and gas company based on total proved worldwide reserves which
were estimated at 7.9 TCFE at December 31, 1997.
 
     The principal executive offices of the Company are located at 5051
Westheimer, Suite 1400, Houston, Texas 77056 and its telephone number is (713)
624-9500.
 
                        THE BURLINGTON RESOURCES TRUSTS
 
     Each of Burlington Resources Capital I and Burlington Resources Capital II
is a statutory business trust formed under Delaware law pursuant to (i) a
separate declaration of trust (the "Declaration") executed by the Company, as
sponsor for such Burlington Resources Trust, and the Trustees (as defined
herein) of such trust and (ii) the filing of a certificate of trust with the
Delaware Secretary of State. Unless an accompanying Prospectus Supplement
provides otherwise, each Burlington Resources Trust exists for the sole purposes
of (i) issuing the Trust Preferred Securities and Trust Common Securities
representing undivided beneficial interest in the assets of such Burlington
Resources Trust, (ii) investing the gross proceeds of the sale of the Trust
Preferred Securities and Trust Common Securities in a specific series of
Subordinated Debt Securities and (iii) engaging in only those other activities
necessary or incidental thereto. All of the Trust Common Securities will be
owned by the Company. The Trust Common Securities will rank pari passu, and
payments will be made thereon pro rata, with the Trust Preferred Securities,
except that upon the occurrence and continuance of an event of default under the
applicable Declaration, the rights of the holders of the applicable Trust Common
Securities to payment in respect of distributions and payments upon liquidation,
redemption and otherwise will be subordinated to the rights of the holders of
the applicable Trust Preferred Securities. The Company will acquire Trust Common
Securities having an aggregate liquidation amount equal to a minimum of 1% of
the total capital of each Burlington Resources Trust. Each Burlington Resources
Trust will have a term of at least 20 but not more than 50 years, but may
terminate earlier as provided in the applicable Declaration. Each Burlington
Resources Trust's business and affairs will be conducted by the Trustees. The
holder of the Trust Common Securities will be entitled to appoint, remove or
replace any of, or increase or reduce the number of, the Trustees of each
Burlington Resources Trust. The duties and obligations of the Trustees shall be
governed by the Declaration of such Burlington Resources Trust. At least one of
the Trustees of each Burlington Resources Trust will be a person who is an
employee or officer of or who is affiliated with the Company (a "Regular
Trustee"). One Trustee of each Burlington Resources Trust will be a financial
institution that is not affiliated with the Company, which shall act as property
trustee and as indenture trustee for the purposes of the Trust Indenture Act of
1939, as amended (the "Trust Indenture Act"), pursuant to the terms set forth in
a Prospectus Supplement (the "Property Trustee"). In addition, unless the
Property Trustee maintains a principal place of business in the State of
Delaware and otherwise meets the requirements of applicable law, one Trustee of
each Burlington Resources Trust will be a legal entity having a principal place
of business or an individual resident of the State of Delaware (the "Delaware
Trustee"). The Company will pay all fees and expenses related to each Burlington
Resources Trust and the offering of Securities. Unless otherwise set forth in
the Prospectus Supplement, the Property Trustee will be Chase Bank of Texas,
National Association, and the Delaware Trustee will be Chase Manhattan Bank
Delaware. The office of the Delaware Trustee in the State of Delaware is 1201
Market Street, Wilmington, Delaware 19801. The principal place of business of
each Burlington Resources Trust is c/o Burlington Resources Inc., 5051
Westheimer, Suite 1400, Houston, Texas 77056, telephone: (713) 624-9500.
 
                                        4
<PAGE>   13
 
                                USE OF PROCEEDS
 
     Except as otherwise described in the accompanying Prospectus Supplement,
the net proceeds from the sale or sales of the Company Securities will be used
by the Company for general corporate purposes, which may include the reduction
of outstanding indebtedness, working capital increases, capital expenditures or
acquisitions. Except as set forth in the Prospectus Supplement accompanying this
Prospectus, each Burlington Resources Trust will use all proceeds received from
the sale of Trust Preferred Securities to purchase Subordinated Debt Securities.
The Company intends to use the net proceeds from the sale of Subordinated Debt
Securities for such general corporate purposes.
 
                       RATIO OF EARNINGS TO FIXED CHARGES
 
     The following table sets forth the Company's consolidated ratios of
earnings to fixed charges for the indicated periods.
 
<TABLE>
<CAPTION>
                                                                YEAR ENDED DECEMBER 31,
THREE MONTHS ENDED                                       -------------------------------------
MARCH 31, 1998                                           1997    1996    1995    1994    1993
- ------------------                                       -----   -----   -----   -----   -----
<S>                                                      <C>     <C>     <C>     <C>     <C>
2.60x..................................................  3.48x   3.48x      --      --   3.42x
</TABLE>
 
                            ------------------------
 
     Total earnings available for fixed charges in 1995 and 1994 were inadequate
to cover total fixed charges in the amount of approximately $567 million and
$274 million, respectively.
 
     For purposes of calculating the ratio of earnings to fixed charges,
earnings represent pretax income from continuing operations available for fixed
charges, less equity in undistributed earnings of 20-50% owned companies,
together with a portion of rent under long-term operating leases representative
of an interest factor. Fixed charges represent interest expense, capitalized
interest and a portion of rent under long-term operating leases representative
of an interest factor.
 
                         DESCRIPTION OF DEBT SECURITIES
 
     Senior Debt Securities may be issued from time to time in one or more
series under an Indenture dated as of April 1, 1992 (the "Senior Indenture"),
between the Company and Citibank, N.A. (the "Senior Trustee"). The Senior
Indenture is an exhibit to the Registration Statement of which this Prospectus
is a part. Subordinated Debt Securities may be issued from time to time in
series under an indenture (the "Subordinated Indenture") between the Company and
a trustee to be identified in the related Prospectus Supplement (the
"Subordinated Trustee"). The Subordinated Indenture will be filed with the
Commission and incorporated by reference as an exhibit to the Registration
Statement of which this Prospectus is a part. The Senior Indenture and the
Subordinated Indenture are sometimes referred to collectively as the
"Indentures," and the Senior Trustee and the Subordinated Trustee are sometimes
referred to collectively as the "Debt Trustees." The following statements under
this caption are summaries of certain provisions contained in the Indentures, do
not purport to be complete and are qualified in their entirety by reference to
the Indentures, including the definitions therein of certain terms. Capitalized
terms used herein and not defined shall have the meanings assigned to them in
the related Indenture. The particular terms of the Debt Securities and any
variations from such general provisions applicable to any series of Debt
Securities will be set forth in the Prospectus Supplement applicable to such
series. Under this caption, the phrase "the Company" refers solely to Burlington
Resources Inc.
 
GENERAL
 
     The Debt Securities will be unsecured obligations of the Company. Neither
Indenture limits the amount of Debt Securities that may be issued thereunder.
The Debt Securities may be issued from time to time in one or more series.
 
                                        5
<PAGE>   14
 
     A Prospectus Supplement relating to a particular series of Debt Securities
will describe the following terms of such Debt Securities: (a) the title of the
Debt Securities; (b) any limit upon the aggregate principal amount of the Debt
Securities; (c) the date or dates on which the principal of the Debt Securities
is payable; (d) the rate or rates at which the Debt Securities will bear
interest, if any, or the method for calculating such rate, and the date or dates
from which such interest will accrue; (e) the dates on which such interest will
be payable and the record dates for the interest payment dates; (f) the place or
places where the principal of and interest, if any, on the Debt Securities will
be payable; (g) the period or periods, if any, within which the price or prices
at which, and the terms and conditions upon which, the Debt Securities may be
redeemed at the option of the Company or otherwise; (h) any mandatory or
optional sinking fund or analogous provisions; (i) if other than denominations
of $1,000 and integral multiples thereof, the denominations in which the Debt
Securities shall be issuable; (j) if other than the principal amount thereof,
the portion of the principal amount of such Debt Securities which shall be
payable upon declaration of the acceleration of the maturity thereof; (k) if
other than U.S. dollars, the currency or currency units in which the Debt
Securities are denominated and/or in which payment of the principal of (and
premium, if any) and/or interest on the Debt Securities will or may be payable;
(l) any deletions, modifications or additions to the Events of Default or
covenants of the Company pertaining to the Debt Securities; (m) the terms, if
any, upon which the Debt Securities of such series will be convertible into or
exchangeable for other securities or other property; and (n) any other terms not
inconsistent with the Indentures, including, without limitation, the addition of
covenants applicable with respect to the Debt Securities.
 
     Unless otherwise indicated in the Prospectus Supplement, the Debt
Securities will be issued only in fully registered form without coupons in
denominations of $1,000 or any integral multiple thereof. No service charge will
be made for any registration of transfer or exchange of Debt Securities, but the
Company may require payment of a sum sufficient to cover any tax or other
governmental charge payable in connection therewith.
 
GLOBAL SECURITIES
 
     The Debt Securities of a series may be issued in the form of one or more
fully registered Global Securities that will be deposited with, or on behalf of,
a depositary (the "Depository") identified in the Prospectus Supplement relating
to such series and registered in the name of the Depository or its nominee.
 
     The specific terms of the depositary arrangement with respect to a series
of Debt Securities will be described in the Prospectus Supplement relating to
such series. The Company anticipates that the following provisions will
generally apply to depositary arrangements.
 
     Upon the issuance of the Global Security, the Depository will credit, on
its book-entry registration and transfer system, the accounts of persons which
have accounts with it ("participants") with the respective principal amounts of
the Debt Securities represented by such Global Security. Such accounts shall
initially be designated by the underwriters. Ownership of beneficial interests
in the Global Security will be limited to participants or persons that may hold
interests through participants. Ownership of beneficial interests by
participants in the Global Security will be shown on, and the transfer of that
ownership interest will be effected only through, records maintained by the
Depository for the Global Security. Ownership of beneficial interests in such
Global Security by persons that hold through participants will be shown on, and
the transfer of that ownership interest with such participant will be effected
only through, records maintained by such participant. Because the Depository can
only act on behalf of the participants of the Depository, who in turn act on
behalf of indirect participants of the Depository, the ability of an owner of a
beneficial interest in the Global Security to pledge Debt Securities to persons
or entities that do not participate in the book-entry or transfer system of the
Depository, or otherwise take actions in respect of such Debt Securities, may be
limited by the lack of a definitive certificate for such Debt Securities. The
laws of some jurisdictions may require that certain purchasers of securities
take physical delivery of such securities in definitive form. Such limits and
such laws may impair the ability to acquire or transfer beneficial interests in
the Global Security.
 
     So long as the Depository or its nominee is the registered owner of the
Global Security, such Depository or such nominee, as the case may be, will
generally be considered the sole owner or holder of the Debt
 
                                        6
<PAGE>   15
 
Securities represented by the Global Security for the purposes of receiving
payment on the Debt Securities, receiving notices and for all other purposes
under the Indentures and the Debt Securities. Beneficial interests in the Debt
Securities will be evidenced only by, and transfers thereof will be effected
only through records maintained by the Depository and its participants. Except
as provided herein, owners of beneficial interests in the Global Security will
not be entitled to have the Debt Securities represented by the Global Security
registered in their names, will not receive or be entitled to receive physical
delivery of such Debt Securities in definitive form and will not be considered
the holders thereof for any purposes under the Indentures. Accordingly, each
person owning a beneficial interest in the Global Security must rely on the
procedures of the Depository, and, if such person is not a participant, on the
procedures of the participant through which such person owns its interest, to
exercise any rights of a holder under the Indentures.
 
     Payment of principal of and interest on Debt Securities represented by the
Global Security registered in the name of the Depository or its nominee will be
made by the Company through the Trustee in U.S. dollars in immediately available
funds to the Depository or its nominee, as the case may be, as the sole
registered owner and the sole holder of the Debt Securities represented thereby
for all purposes under the Indentures. Neither the Company, the Trustee nor any
agent of the Company or the Trustee will have any responsibility or liability
for (i) any aspect of the Depository's records relating to or payments made on
account of beneficial ownership interests in the Global Security representing
any Debt Securities or for maintaining, supervising or reviewing any of the
Depository's records relating to such beneficial ownership interests, (ii) the
payment to the owners of beneficial interests in the Global Security of amounts
paid to the Depository or its nominee, or (iii) any other matter relating to the
actions and practices of the Depository, its nominee, or its participants.
 
     The Company expects that the Depository, upon receipt of any payment of
principal of or interest on the Global Security, will credit, on its book-entry
registration and transfer system, the accounts of participants with payments in
amounts proportionate to their respective beneficial interests in the principal
amount of the Global Security as shown on the records of the Depository or its
nominee. The Company also expects that payments by participants to owners of
beneficial interests in the Global Security held through such participants will
be governed by standing instructions and customary practices as is now the case
with securities held for customer accounts registered in "street name" and will
be the sole responsibility of such participants.
 
     The Global Security will not be transferable except as a whole by the
Depository to a nominee of the Depository or by a nominee of the Depository to
the Depository or another nominee of the Depository or by the Depository or any
such nominee to a successor of the Depository or a nominee of such successor.
The Global Security representing Debt Securities is exchangeable for Debt
Securities in certificate form only if (i) the Depository notifies the Company
that it is unwilling or unable to continue as Depository for the Global Security
or if at any time the Depository ceases to be a clearing agency registered under
the Exchange Act, and the Company fails within 90 days thereof to appoint a
successor or (ii) the Company at any time and in its sole discretion, determines
not to have any of the Debt Securities represented by one or more Global
Securities. The Global Security that is exchangeable pursuant to the preceding
sentence shall be exchangeable for Debt Securities in certificated form issuable
in denominations of $1,000 and integral multiples thereof and registered in such
names as the Depository holding the Global Security shall direct. Subject to the
foregoing, the Global Security is not exchangeable, except for Global Securities
of like denominations to be registered in the name of the Depository or its
nominee.
 
     Conveyance of notices and other communications by the Depository to
participants and by participants to beneficial owners of the Debt Securities
represented by the Global Security will be governed by arrangements among them,
subject to any statutory or regulatory requirements as may be in effect from
time to time. Neither the Depository nor its nominee will consent or vote with
respect to the Debt Securities represented by the Global Security. Under its
usual procedures, the Depository would mail an omnibus proxy to the Company as
soon as possible after the record date. The omnibus proxy assigns the consenting
or voting rights of the Depository's nominee to those participants to whose
account the Debt Securities represented by the Global Security are credited on
the record date (identified in a listing attached to the omnibus proxy).
 
                                        7
<PAGE>   16
 
RANKING OF DEBT SECURITIES
 
     The Senior Debt Securities will be unsecured and will rank equally and
ratably with other unsecured and unsubordinated debt of the Company.
 
     The obligations of the Company pursuant to any Subordinated Debt Securities
will be subordinate in right of payment to all Senior Indebtedness of the
Company, and will be described in an accompanying Prospectus Supplement. The
Subordinated Indenture will not contain any limitation on the amount of Senior
Indebtedness which may be hereafter incurred by the Company.
 
CERTAIN COVENANTS OF THE COMPANY
 
     The Indentures contain, among others, the covenants summarized below, which
will be applicable (unless waived or amended) to any series of Debt Securities
which are outstanding, unless stated otherwise in the Prospectus Supplement
relating to such series.
 
     Limitation on Liens. The Company will not, nor will it permit any
Subsidiary to, create, assume, incur or suffer to exist any mortgage, pledge,
lien, charge, security interest, conditional sale or other title retention
agreement or other similar encumbrance ("Mortgage") upon any stock or Debt,
whether owned on the date of the Indenture or thereafter acquired, of any
Subsidiary (other than a Subsidiary, the stock or Debt of which at the date of
the Indenture is subject to a Mortgage or is required to be subject to a
Mortgage, but without increase in the principal amount which is secured thereby
and limited to the stock or Debt then subject to such Mortgage), to secure any
Debt of the Company or any other person (other than the Securities), without in
any such case making effective provision whereby all of the Securities
Outstanding shall be directly secured equally and ratably with such Debt,
excluding, however, from the operation of the foregoing provisions of this
paragraph any Mortgage upon stock or Debt of any corporation existing at the
time such corporation becomes a Subsidiary, or existing upon stock or Debt of a
Subsidiary at the time of acquisition of such stock or Debt, and any extension,
renewal or replacement (or successive extensions, renewals or replacements) in
whole or in part of any such Mortgage; provided, however, that the principal
amount of Debt secured thereby shall not exceed the principal amount of Debt so
secured at the time of such extension, renewal or replacement; and provided,
further, that such Mortgage shall be limited to all or such part of the stock or
Debt which was subject to the Mortgage so extended, renewed or replaced.
 
     The Company will not, nor will it permit any Restricted Subsidiary to,
create, assume, incur or suffer to exist any Mortgage upon any Principal
Property, whether owned or leased on the date of the Indenture or thereafter
acquired, to secure any Debt of the Company or any other person (other than the
Securities), without in any such case making effective provision whereby all of
the Securities Outstanding shall be directly secured equally and ratably with
such Debt, excluding, however, the following: (i) any Mortgage upon property
owned or leased by any corporation existing at the time such corporation becomes
a Restricted Subsidiary; (ii) any Mortgage upon property existing at the time of
acquisition thereof; (iii) any Mortgage to secure the payment of all or any part
of the purchase price of property or to secure any Debt incurred prior to, at
the time of or within 180 days after the acquisition of such property for the
purpose of financing all or any part of the purchase price thereof, other than a
purchase by a Subsidiary from a Restricted Subsidiary or from the Company; (iv)
any Mortgage upon property to secure all or any part of the cost of exploration,
drilling, development, construction, alteration, repair or improvement of all or
any part of such property, or Debt incurred prior to, at the time of or within
180 days after the completion of such exploration, drilling, development,
construction, alteration, repair or improvement for the purpose of financing all
or any part of such cost, provided that such cost is incurred to obtain, or
materially increase the production and revenues from, such property; (v) any
Mortgage secured by pipeline assets of El Paso Natural Gas Company; (vi) any
Mortgage securing Debt of a Restricted Subsidiary owing to the Company or to
another Restricted Subsidiary; (vii) any Mortgage existing at the date of the
Indenture; and (viii) any extension, renewal or replacement (or successive
extensions, renewals or replacements) in whole or in part of any Mortgage
referred to in the foregoing clauses (i) to (vii), inclusive; provided, however,
that the principal amount of Debt secured thereby shall not exceed the principal
amount of Debt so secured at the time of such extension, renewal or
 
                                        8
<PAGE>   17
 
replacement; and provided, further, that such Mortgage shall be limited to all
or such part of the property which was subject to the Mortgage so extended,
renewed or replaced (plus improvements on such property).
 
     Notwithstanding the foregoing provisions of the second paragraph of this
covenant, the Company may, and may permit any Restricted Subsidiary to, create,
assume, incur or suffer to exist any Mortgage upon any Principal Property which
is not excepted by clauses (i) through (viii) above without equally and ratably
securing the Securities, provided that the aggregate amount of all Debt then
outstanding secured by such Mortgage and all similar Mortgages, together with
all net sale proceeds from Sale-Leaseback Transactions which are not permitted
pursuant to clauses (i) and (ii) of the "Limitation on Sale-Leasebacks"
covenant, does not exceed 5% of the total consolidated stockholders' equity of
the Company as shown on the audited consolidated balance sheet contained or
incorporated by reference in the Company's latest Annual Report on Form 10-K.
For the purpose of this and the preceding paragraph, the following types of
transactions shall not be deemed to create a Mortgage to secure any Debt: (i)
the sale or other transfer of (A) any gas or oil or 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 gas or oil or minerals or (B) any other interest in property of the
character commonly referred to as a "production payment"; and (ii) any Mortgage
in favor of the United States of America or any state thereof, or any other
country, or any political subdivision of any of the foregoing, to secure
partial, progress, advance or other payments pursuant to the provisions of any
contract or statute, or any Mortgage securing industrial development, pollution
control or similar revenue bonds.
 
     Limitation on Sale-Leasebacks. The Company will not, nor will it permit any
Restricted Subsidiary to, sell or transfer any Principal Property with the
Company or any Restricted Subsidiary taking back a lease of such Principal
Property (a "Sale-Leaseback Transaction"), unless (i) such Sale-Leaseback
Transaction occurs within 180 days from the date of acquisition of such
Principal Property or the date of the completion of construction or commencement
of full operations on such Principal Property, whichever is later, or (ii) the
Company, within 120 days after such Sale-Leaseback Transaction, applies or
causes to be applied to the retirement of Funded Debt of the Company or any
Subsidiary (other than Funded Debt of the Company which by its terms or the
terms of the instrument pursuant to which it was issued is subordinate in right
of payment to the Securities) an amount not less than the net proceeds of the
sale of such Principal Property.
 
     Notwithstanding the foregoing provisions of this covenant, the Company may,
and may permit any Restricted Subsidiary to, effect any Sale-Leaseback
Transaction involving any Principal Property, provided that the net sale
proceeds from such Sale-Leaseback Transaction, together with all Debt secured by
Mortgages not specifically excluded pursuant to clauses (i) through (viii) of
the second paragraph of the "Limitation on Liens" covenant from the operation of
such paragraph, does not exceed 5% of the total consolidated stockholders'
equity of the Company as shown on the audited consolidated balance sheet
contained or incorporated by reference in the Company's latest Annual Report on
Form 10-K. The provisions of this covenant shall also not prevent any
Sale-Leaseback Transaction involving a lease for a period, including renewals,
of not more than 36 months.
 
MERGER AND CONSOLIDATION
 
     The Company shall not consolidate with or merge into any other corporation
or convey, transfer or lease its properties and assets substantially as an
entirety to any person, unless (1) in case the Company shall consolidate with or
merge into another corporation or convey, transfer or lease its properties and
assets substantially as an entirety to any person, the corporation formed by
such consolidation or into which the Company is merged or the person which
acquires by conveyance or transfer, or which leases, the properties and assets
of the Company substantially as an entirety shall be a corporation organized and
existing under the laws of the United States of America, any state thereof or
the District of Columbia and shall expressly assume, by an indenture
supplemental hereto, executed and delivered to the Trustee, in form satisfactory
to the Trustee, the due and punctual payment of the principal of and interest,
if any, on all the Securities and the performance of every covenant of the
Indenture on the part of the Company to be performed or observed; (2)
immediately after giving effect to such transaction, no Event of Default, and no
event which, after notice or lapse of time or both, would become an Event of
Default, shall have occurred and be continuing; and
 
                                        9
<PAGE>   18
 
(3) the Company has delivered to the Trustee an officers' certificate and an
opinion of counsel, each stating that such consolidation, merger, conveyance,
transfer or lease and, if a supplemental indenture is required in connection
with such transaction, such supplemental indenture comply with Article Eight of
the Indenture and that all conditions precedent herein provided for relating to
such transaction have been complied with.
 
     Upon any consolidation or merger by the Company with or into any other
corporation or any conveyance, transfer or lease of the properties and assets of
the Company substantially as an entirety to any person in accordance with the
preceding paragraph, the successor corporation formed by such consolidation or
into which the Company is merged or to which such conveyance, transfer or lease
is made shall succeed to, and be substituted for, and may exercise every right
and power of, the Company under the Indenture with the same effect as if such
successor corporation had been named as the Company herein, and thereafter,
except in the case of a lease to another person, the predecessor corporation
shall be relieved of all obligations and covenants under the Indenture and the
Securities.
 
CERTAIN DEFINITIONS
 
     "Debt" means indebtedness for money borrowed.
 
     "Funded Debt" means all Debt maturing one year or more from the date of the
creation thereof, all Debt directly or indirectly renewable or extendible, at
the option of the debtor, by its terms or by the terms of any instrument or
agreement relating thereto, to a date one year or more from the date of the
creation thereof, and all Debt under a revolving credit or similar agreement
obligating the lender or lenders to extend credit over a period of one year or
more.
 
     "Outstanding," when used with respect to Securities, means, as of the date
of determination, all Securities theretofore authenticated and delivered under
the Indenture, except: (i) Securities theretofore cancelled by the Trustee or
delivered to the Trustee for cancellation; (ii) Securities, or portions thereof,
for whose payment money in the necessary amount has been theretofore deposited
with the Trustee or any Paying Agent (other than the Company) in trust or set
aside and segregated in trust by the Company (if the Company shall act as its
own Paying Agent) for the Holders of such Securities; and (iii) Securities in
exchange for or in lieu of which other Securities have been authenticated and
delivered pursuant to the Indenture; provided, however, that in determining
whether the holders of the requisite principal amount of the Outstanding
Securities have given any request, demand, authorization, direction, notice,
consent or waiver hereunder, Securities owned by the Company or any other
obligor upon the Securities or any affiliate of the Company or of such other
obligor shall be disregarded and deemed not to be Outstanding, except that, in
determining whether the Trustee shall be protected in relying upon any such
request, demand, authorization, direction, notice, consent or waiver, only
Securities which the Trustee knows to be so owned shall be so disregarded.
Securities so owned which have been pledged in good faith may be regarded as
Outstanding if the pledgee establishes to the satisfaction of the Trustee the
pledgee's right so to act with respect to such Securities and that the pledgee
is not the Company or any other obligor upon the Securities or any affiliate of
the Company or of such other obligor.
 
     "Principal Property" means (i) any property owned or leased by the Company
or any Subsidiary, or any interest of the Company or any subsidiary in property,
located within the United States of America or any State thereof or the Dominion
of Canada or any Province or Territory thereof (including property located off
the coast of the United States of America or the Dominion of Canada held
pursuant to lease from any federal, state, provincial or other governmental
body) which is considered by the Company to be capable of producing gas or oil
in commercial quantities, and (ii) any refinery, processing or manufacturing
plant owned or leased by the Company or any Subsidiary and located within the
United States of America or any state thereof or the Dominion of Canada or any
province or territory thereof, except (a) facilities related thereto employed in
transportation, distribution or marketing or (b) any such plant which in the
opinion of the Board of Directors is not a principal plant in relation to the
activities of the Company and its Restricted Subsidiaries as a whole.
 
     "Restricted Subsidiary" means any Subsidiary which owns or leases (as
lessor or lessee) a Principal Property, but such term does not include any
Subsidiary the principal business of which is leasing machinery,
 
                                       10
<PAGE>   19
 
equipment, vehicles or other properties none of which is a Principal Property,
or financing accounts receivable, or engaging in ownership and development of
any real property which is not a Principal Property.
 
     "Securities" means the unsecured debentures, notes or other evidences of
indebtedness to be issued in one or more series as provided in the Indenture and
more particularly means any securities authenticated and delivered under the
Indenture.
 
     "Subsidiary" means a corporation more than 50% of the outstanding voting
stock of which is owned, directly or indirectly, by the Company or by one or
more other Subsidiaries, or by the Company and one or more other Subsidiaries.
 
EVENTS OF DEFAULT; RIGHTS ON DEFAULT
 
     An "Event of Default" will occur under the Indentures with respect to Debt
Securities of a particular series if (a) the Company shall fail to pay when due
all or any part of the principal of such series of Debt Securities (whether at
maturity or upon acceleration or otherwise), (b) the Company shall fail to pay
when due any installment of interest on such series of Debt Securities and such
default shall continue for 30 days, (c) the Company shall fail to make, when due
by the terms of the Debt Securities of such series, the deposit of any sinking
fund payment, (d) the Company shall fail to perform or observe any other term,
covenant or agreement contained in the Indentures or the Debt Securities with
respect to such series of Debt Securities for a period of 60 days after written
notice thereof, as provided in the Indentures or (e) certain events of
bankruptcy, insolvency or reorganization shall have occurred.
 
     The Indentures provide that (1) if an Event of Default due to the default
in payment of principal of, or interest on, a series of Debt Securities or due
to a failure to perform or observe any other term, covenant or agreement
contained in the Indentures with respect to a series of Debt Securities (but not
with respect to all series of Debt Securities) shall have occurred and be
continuing, either the Trustee or the holders of 25% in principal amount of Debt
Securities of such series then outstanding may declare the principal of all Debt
Securities of such series and interest accrued thereon to be due and payable
immediately or (2) if an Event of Default due to a failure to perform or observe
any other term, covenant or agreement in the Indentures with respect to all
series of Debt Securities then outstanding, or certain events of bankruptcy,
insolvency and reorganization of the Company shall have occurred and be
continuing, either the Trustee or the holders of 25% in principal amount of all
Debt Securities then outstanding which have not previously become due and
payable (treated as one class) may declare the principal of all Debt Securities
and interest accrued thereon to be due and payable immediately. Upon certain
conditions such declarations may be annulled by the holders of a majority in
principal amount of Debt Securities of each series affected (voting as a
separate class) and past defaults may be waived (except a continuing default in
payment of principal of or interest on any series of Debt Securities) by the
holders of a majority in principal amount of Debt Securities of each series
affected (voting as a separate class).
 
     The holders of a majority in principal amount of the outstanding Debt
Securities of any series affected (each series voting as a separate class) may
direct with respect to such series the time, method and place of conducting any
proceeding for any remedy available to the Trustee or exercising any trust or
power conferred on the Trustee, provided that such direction shall not be in
conflict with any rule of law or the Indentures. Before proceeding to exercise
any right or power under the Indentures with respect to such series at the
direction of such holders, the Trustee shall be entitled to receive from such
holders reasonable security or indemnity against the costs, expenses and
liabilities which might be incurred by it in compliance with any such direction.
 
     The Company will be required to furnish to the Trustee annually a statement
of certain officers of the Company to the effect that to the best of their
knowledge the Company is not in default in the performance of the terms of the
Indentures or, if they have knowledge that the Company is in default, specifying
such default. The Indentures require the Trustee to give to all holders of
outstanding Debt Securities notice of any default by the Company, unless such
default shall have been cured or waived; however, except in the case of a
default in the payment of principal or of interest on any outstanding Debt
Securities, the Trustee is entitled to withhold such notice in the event that
the board of directors, the executive committee or a trust committee of
 
                                       11
<PAGE>   20
 
directors or certain officers of the Trustee in good faith determine that
withholding such notice is in the interest of the holders of the outstanding
Debt Securities.
 
DEFEASANCE
 
     Under arrangements reasonably satisfactory to the Trustee, the Company may
discharge certain obligations to holders of Debt Securities of any series which
have not already been delivered to the Trustee for cancellation and which have
either become due and payable or are by their terms due and payable within one
year or are to be called for redemption within one year by irrevocably
depositing with the Trustee funds in an amount sufficient to pay at maturity the
principal of and interest on such series of Debt Securities.
 
     The Indentures also provide that the Company will be discharged from its
obligations in respect of any series of Debt Securities under the Indentures
(including its obligation to comply with the provisions referred to under
"-- Certain Covenants of the Company," if applicable, but excluding certain
other obligations, such as the obligation to pay principal of and interest on
the Debt Securities of such series then outstanding and obligations to register
the transfer or exchange of such outstanding Debt Securities of such series and
to replace stolen, lost or mutilated certificates), upon the irrevocable
deposit, in trust, of cash or U.S. Government Obligations which through the
payment of interest and principal thereof in accordance with their terms will
provide cash in an amount sufficient to pay any installment of principal of and
interest on such outstanding Debt Securities of such series on the stated
maturity of such payments in accordance with the terms of the Indentures and
such outstanding Debt Securities of such series, provided that the Company has
received an opinion of counsel or a favorable ruling of the Internal Revenue
Service to the effect that such a discharge will not be deemed, or result in, a
taxable event with respect to holders of the outstanding Debt Securities of such
series and that certain other conditions are met.
 
CHANGES IN CONTROL AND HIGHLY LEVERAGED TRANSACTIONS
 
     The Indentures do not contain provisions requiring redemption of the Debt
Securities by the Company, or adjustment to any terms of the Debt Securities,
upon any change in control of the Company.
 
     Other than restrictions on Liens and Sale-Leaseback Transactions described
under "-- Certain Covenants of the Company" above, the Indentures do not contain
any covenants or other provisions designed to afford holders of the Debt
Securities protection in the event of a highly leveraged transaction involving
the Company.
 
MODIFICATION OF THE INDENTURES
 
     The Indentures provide that the Company and the Trustee may enter into
supplemental indentures without the consent of the holders of Debt Securities
to: (a) secure any of the Debt Securities, (b) evidence the assumption by a
successor corporation of the obligations of the Company, as described under
"-- Merger and Consolidation" above, (c) add covenants and Events of Default for
the protection of the holders of all or any particular series of Debt
Securities, (d) change or eliminate any of the provisions of the Indentures,
provided that any such change or elimination shall become effective only after
there are no Debt Securities of any series entitled to the benefit of such
provision outstanding, (e) establish the forms or terms of Debt Securities of
any series, (f) cure any ambiguity or correct any inconsistency in the
Indentures, or (g) evidence the acceptance of appointment by a successor
trustee.
 
     The Indentures also contain provisions permitting the Company and the
Trustee, with the consent of the holders of not less than a majority in
principal amount of all series of Debt Securities then outstanding (each such
series voting as a separate class) affected thereby, to add any provisions to,
or change in any manner or eliminate any of the provisions of, the Indentures,
or modify in any manner the rights of the holders of such Debt Securities,
provided that the Company and the Trustee may not, without the consent of the
holder of each outstanding Debt Security affected thereby, (a) change the stated
maturity of the principal of or any installment of interest on any Debt
Security, reduce the principal amount thereof, reduce the rate of interest
thereon, change the place of payment where, or the coin or currency in which,
interest is payable, or impair the right to institute suit for the enforcement
of any such payment when due or (b) reduce the aforesaid
 
                                       12
<PAGE>   21
 
percentage in principal amount of Debt Securities the consent of the holders of
which is required for any such modification.
 
APPLICABLE LAW
 
     The Debt Securities and the Indentures will be governed by and construed in
accordance with the law of the State of New York.
 
SENIOR TRUSTEE
 
     Citibank, N.A. is the Senior Trustee under the Senior Indenture. Citibank,
N.A. serves as trustee under various indentures relating to obligations of the
Company. The Company has customary banking relationships with Citibank, N.A.,
including participation as one of the agent banks in the Company's Revolving
Credit Agreements.
 
                          DESCRIPTION OF CAPITAL STOCK
 
     The authorized capital stock of the Company consists of 325,000,000 shares
of Common Stock and 75,000,000 shares of Preferred Stock, of which 3,250,000
shares are designated Series A Preferred Stock. The following description of the
capital stock of the Company is a summary, and as such does not purport to be
complete and is subject and qualified in its entirety by reference to the more
complete descriptions contained in (i) the Certificate of Incorporation of the
Company, as amended (the "Certificate"), (ii) the By-Laws of the Company, as
amended (the "By-Laws"), (iii) the Rights Agreement, effective December 16,
1988, as amended, between the Company and The First National Bank of Boston, as
Rights Agent (the "Rights Agreement"), and (iv) the certificate of designation
relating to each series of Preferred Stock.
 
COMMON STOCK
 
     The holders of Common Stock are entitled to one vote for each share held of
record on all matters submitted to a vote of stockholders. Subject to
preferences that may be applicable to any outstanding Preferred Stock, holders
of Common Stock are entitled to receive ratably such dividends as may be
declared by the Board of Directors out of funds legally available therefor. In
the event of a liquidation, dissolution or winding up of the Company, holders of
Common Stock are entitled to share ratably in all assets remaining after payment
of liabilities and the liquidation preference of any outstanding Preferred
Stock. Holders of Common Stock have no preemptive rights and have no rights to
convert their Common Stock into any other securities and there are no redemption
provisions with respect to such shares. All of the outstanding shares of Common
Stock are, and the shares offered hereby will be, fully paid and nonassessable.
 
PREFERRED STOCK
 
     The Board of Directors has the authority to issue shares of Preferred Stock
in one or more series, the shares of each such series to have such voting
powers, full or limited, or no voting powers, and such designations, preferences
and relative, participating, optional or other special rights and
qualifications, limitations or restrictions thereof as are stated in the
Certificate or in the resolutions providing for the issue of such series adopted
by the Board of Directors.
 
     The Board of Directors is authorized with respect to each series of
Preferred Stock to fix by resolution providing for the issue of such series the
number of shares of such series, the voting powers, full or limited, if any, of
the shares of such series and the designations, preferences and relative,
participating, optional or other special rights and the qualifications,
limitations or restrictions thereof. The authority of the Board of Directors
with respect to each series of Preferred Stock shall include, but not be limited
to, the determination or fixing of the following:
 
          (a) The number of shares of such series;
 
          (b) The designation of such series;
 
                                       13
<PAGE>   22
 
          (c) The dividend on the shares of such series, the conditions and
     dates upon which such dividends shall be payable, the relation which such
     dividends shall bear to the dividends payable on any other class or classes
     or on any other series of any class or classes of stock of the Company and
     whether such dividends shall be cumulative or noncumulative;
 
          (d) Whether the shares of such series shall be subject to redemption
     by the Company and, if made subject to such redemption, the times, prices,
     rates, adjustments, and other terms and conditions of such redemption;
 
          (e) The terms and amounts of any sinking fund provided for the
     purchase or redemption of the shares of such series;
 
          (f) Whether or not the shares of such series shall be convertible into
     or exchangeable for shares of any other class or classes or of any other
     series of any class or classes of stock of the Company and, if provision be
     made for conversion or exchange, the times, prices, rates, adjustments, and
     other terms and conditions of such conversion or exchange;
 
          (g) The extent, if any, to which the holders of the shares of such
     series shall be entitled to vote with respect to the election of directors
     or otherwise, including the right to elect a specified number or class of
     directors, the extent, if any, to which the holders of the shares of such
     series shall have (i) separate voting rights with respect to the matters
     solely affecting the preferences, rights or powers of such series but not
     so affecting the Common Stock or the entire class of Preferred Stock and
     (ii) on a pro rata basis with other shares of Preferred Stock having voting
     rights, voting rights with respect to matters solely affecting the
     preferences, rights or powers of the entire class of Preferred Stock but
     not so affecting the Common Stock, the number or percentage of votes
     required for certain actions, and the extent to which a vote by class or
     series shall be required for certain actions;
 
          (h) The restrictions, if any, on the issue or reissue of any Preferred
     Stock;
 
          (i) The amount or amounts payable upon the shares of such series in
     the event of voluntary or involuntary liquidation, dissolution or winding
     up of the Company prior to any payment or distribution of the assets of the
     Company to any class or classes of stock of the Company ranking junior to
     the Preferred Stock;
 
          (j) Whether, and the extent to which, any of the voting powers,
     designations, preferences, rights and qualifications, limitations or
     restrictions of any such series may be made dependent upon facts
     ascertainable outside the Certificate or of any amendment thereto, or
     outside the resolution or resolutions providing for the issuance of such
     series adopted by the Board of Directors, provided that the manner in which
     such facts shall operate upon the voting powers, designations, preferences,
     rights and qualifications, limitations or restrictions of such series is
     clearly and expressly set forth in the resolution or resolutions providing
     for the issuance of such series adopted by the Board of Directors;
 
          (k) The extent, if any, to which any committee of the Board of
     Directors may fix the designations and any of the preferences, privileges
     and powers and relative, participating, optional or other special rights
     and qualifications, limitations or restrictions of the shares of such
     series relating to dividends, redemption, dissolution, any distribution of
     assets of the Company or the conversion into or exchange of such shares for
     shares of any other class or classes of stock of the Company or any other
     series of the same or any other class or classes of stock of the Company,
     or fix the number of shares of any such series or authorize the increase or
     decrease in the shares of such series; and
 
          Any other preferences, privileges and powers and relative,
     participating, optional or other special rights and qualifications,
     limitations or restrictions of such series, as the Board of Directors may
     deem advisable, which shall not adversely affect any other class or series
     of Preferred Stock at the time outstanding and which shall not be
     inconsistent with the provisions hereof.
 
     As of May 1, 1998, no shares of Preferred Stock were issued or outstanding.
The Company has no present plans to issue any of the Preferred Stock, except as
required under the Rights Agreement.
 
                                       14
<PAGE>   23
 
     The holders of shares of the Preferred Stock shall be entitled to receive
dividends to the extent provided by the Board of Directors in designating the
particular series of Preferred Stock. To the extent provided by the resolutions
of the Board of Directors providing for the issue of a series of Preferred
Stock, the holders of each such series of Preferred Stock will have the right to
vote for the election of members of the Board of Directors of the Company and
the right to vote on all other matters, except those matters on which the
holders of a separate class or series of the Company's stock are entitled to
vote separately by class or series.
 
RIGHTS AGREEMENT
 
     Each share of Common Stock currently has a Right (as defined below)
associated with it. The Rights Agreement expires on December 16, 1998.
 
     On December 15, 1988, the Company adopted the Rights Agreement and declared
a dividend distribution of one right (a "Right") for each outstanding share of
Common Stock. Under certain conditions, each Right may be exercised to purchase
one one-hundredth of a share of Series A Preferred Stock of the Company at a
purchase price of $95 per one one-hundredth share, subject to adjustment. The
Rights will be exercisable upon the earlier to occur of (i) a public
announcement that a person or group, without the prior consent of the Company
has acquired, or obtained the right to acquire, beneficial ownership of 15% or
more of the outstanding shares of Common Stock (any such person or group, an
"Acquiring Person"); or (ii) ten days following the commencement of a tender or
exchange offer which would result in any person or group of related persons
becoming an Acquiring Person, without the prior consent of the Company.
 
     If any person or group becomes an Acquiring Person, or thereafter the
Company is involved in a merger or other business combination in which 50% or
more of the Company's assets or earning power is sold, each Right will entitle
its holder to receive, upon exercise, Common Stock (or, in the case of a merger
or other business combination, stock of the acquiring company) having a value
equal to two times the exercise price of the Right. The Company will be entitled
to redeem the Rights at $.05 per Right at any time prior to the earlier of the
expiration of the Rights or the time that a person has acquired or obtained the
right to acquire a 20% position. The Rights do not have voting or dividend
rights and, until they become exercisable, have no dilutive effect on the
earnings of the Company.
 
     The Series A Preferred Stock purchasable upon exercise of the Rights will
be non-redeemable and junior to any other series of Preferred Stock the Company
may issue (unless otherwise provided in the terms of such stock). Each share of
Series A Preferred Stock will have a preferential quarterly dividend in an
amount equal to 100 times the dividend declared on each share of Common Stock,
but in no event less than $10 (the equivalent of $.10 per common share). In the
event of liquidation, the holders of Series A Preferred Stock will receive a
preferred liquidation payment equal to the greater of 100 times $95 or 100 times
the payment made per each share of Common Stock. Each share of Series A
Preferred Stock will have one vote, voting together with the shares of Common
Stock. In the event of any merger, consolidation or other transactions in which
shares of Common Stock are exchanged, each share of Series A Preferred Stock
will be entitled to receive 100 times the amount and type of consideration
received per share of Common Stock. The rights of the Series A Preferred Stock
as to dividends, liquidation and voting, and in the event of mergers and
consolidations, are protected by customary anti-dilution provisions. Fractional
shares of Series A Preferred Stock will be issuable; however, the Company may
elect to distribute depositary receipts in lieu of such fractional shares. In
lieu of fractional shares other than fractions that are multiples of one
one-hundredth of a share, an adjustment in cash will be made based on the market
price of the Series A Preferred Stock on the last trading date prior to the date
of exercise.
 
CERTAIN PROVISIONS AFFECTING CONTROL OF THE COMPANY
 
     Certificate of Incorporation. Under the Delaware General Corporation Law
(the "DGCL"), the approval by the affirmative vote of the holders of a majority
of the outstanding stock of a corporation entitled to vote on the matter
generally is required for a merger, consolidation or sale, lease or exchange of
all or substantially all the corporation's assets to be consummated. The
Certificate provides certain restrictions on business combinations with
"Interested Stockholders" (as defined in the Certificate) or their affiliates.
 
                                       15
<PAGE>   24
 
Accordingly, the Certificate requires the affirmative vote of at least 51% of
the "Voting Stock" (as defined in the Certificate), excluding the vote of any
Interested Stockholder, for the adoption or authorization of a Business
Combination (as defined in the Certificate) unless (i) the Disinterested
Directors (as defined in the Certificate) determine that the Interested
Stockholder is the beneficial owner of at least 80% of the Voting Stock and has
agreed to vote in favor of such Business Combination or (ii) the fair market
value of the consideration per share to be received by the holders of shares in
the Business Combination is equal to or greater than the consideration paid by
an Interested Stockholder in acquiring the largest number of shares of such
class of stock previously acquired in any one transaction or series of related
transactions and the Interested Stockholder has not received the benefit of any
loans, advances, guarantees, pledges or other financial assistance provided by
the Company.
 
     The DGCL permits the certificate of incorporation or the by-laws of a
corporation to contain provisions governing the number and qualifications of
directors. However, if the certificate of incorporation contains provisions
fixing the number of directors, such number may not be changed without amending
the certificate of incorporation. The By-Laws state that the number of directors
shall be any number not less than one, which number shall be fixed from time to
time by a vote of a majority of the directors then in office. The current number
of directors fixed by resolution of the Board of Directors is twelve. Pursuant
to the By-Laws, directors are elected at the annual meeting of stockholders for
a term of one year.
 
     Under the DGCL, a proposed amendment to the certificate of incorporation
requires a resolution adopted by the board of directors and, unless otherwise
provided in the certificate of incorporation, the affirmative vote of the
holders of a majority of the outstanding stock entitled to vote thereon and (if
applicable) the affirmative vote of the holders of a majority of the outstanding
stock of each class entitled to vote thereon as a class. If any such amendment
would adversely affect the rights of any holders of shares of a class or series
of stock, the vote of the holders of a majority of all outstanding shares of the
class or series, voting as a class, is also necessary to authorize such
amendment. However, the Certificate provides that no amendment to the
Certificate shall amend, alter or repeal the provisions of Article 14 (action by
stockholders without a meeting) or Article 15 (special voting requirements)
without the affirmative vote of not less than 51% of the Voting Stock (as such
term is defined in the Certificate).
 
     Under the DGCL, the power to adopt, alter and repeal the by-laws is vested
in the stockholders, except to the extent that a corporation's certificate of
incorporation or by-laws vest it in the board of directors. However, the
conferral of the power to adopt, alter and repeal the by-laws upon the directors
does not divest the stockholders of their power to adopt, amend or repeal the
by-laws. The Certificate grants the Board of Directors the power to make and
alter the By-Laws subject to certain restrictions and the provisions of the By-
Laws. With certain exceptions and subject to the power of the stockholders to
amend and alter the By-Laws, the By-Laws provide that the By-Laws may be altered
or repealed (i) by the affirmative vote of the holders of a majority of shares
present and entitled to vote at a meeting of stockholders or (ii) by the
affirmative vote of a majority of the whole Board of Directors.
 
     The DGCL provides that a special meeting of stockholders may be called by
the board of directors or by such person or persons as may be authorize by a
corporation's certificate of incorporation or by-laws. The By-Laws provide that
special meetings may be called only by the Board of Directors, the Chairman of
the Board, or the President of the Company.
 
     Under the DGCL, unless otherwise provided in the corporation's certificate
of incorporation, any action required or permitted to be taken at a meeting of
stockholders may be taken without a meeting, without prior notice and without a
vote, if a written consent or consents setting forth the action taken are signed
by the holders of outstanding stock having not less than the minimum number of
votes that would be necessary to authorize or take such action at a meeting at
which all shares entitled to vote upon such action were present and voted and
such votes are delivered to the corporation. However, the Certificate provides
that any action by stockholders shall be taken at a meeting of stockholders and
no action may be taken by written consent of the stockholders.
 
     Under the DGCL, a stockholder does not have preemptive rights unless such
rights are specifically granted in the corporation's certificate of
incorporation. The Certificate provides that no holder of stock of any
 
                                       16
<PAGE>   25
 
class of the Company shall have, as such holder, any preemptive or preferential
right with respect to any stock of any class of the Company or to any securities
convertible into shares of stock of the Company.
 
     Delaware Business Combination Law. Section 203 of the DGCL generally
prohibits a Delaware corporation from engaging in a "Business Combination"
(defined as a variety of transactions, including mergers, asset sales, issuance
of stock and other transactions resulting in a financial benefit to the
Interested Stockholder) with an "Interested Stockholder" (defined generally as a
person that is the beneficial owner of 15% or more of a corporation's
outstanding voting stock) for a period of three years following the date that
such person became an Interested Stockholder unless:
 
          (i) prior to the date such person became an Interested Stockholder,
     the board of directors of the corporation approved either the Business
     Combination or the transaction that resulted in the stockholder's becoming
     an Interested Stockholder;
 
          (ii) upon consummation of the transaction that resulted in the
     stockholder becoming an Interested Stockholder, the Interested Stockholder
     owned at least 85% of the voting stock of the corporation outstanding at
     the time the transaction commenced, excluding stock held by directors who
     are also officers of the corporation and employee stock ownership plans
     that do not provide employees with the right to determine confidentially
     whether shares held subject to the plan will be tendered in a tender or
     exchange offer; or
 
          (iii) on or subsequent to the date such person became an Interested
     Stockholder, the Business Combination is approved by the board of directors
     of the corporation and authorized at a meeting of stockholders, and not by
     written consent, by the affirmative vote of the holders of at least 66 2/3%
     of the outstanding voting stock of the corporation not owned by the
     Interested Stockholder.
 
     A corporation may adopt an amendment to its certificate of incorporation or
by-laws expressly electing not to be governed by Section 203 of the DGCL if, in
addition to any other vote required by law, such amendment is approved by the
affirmative vote of a majority of the shares entitled to vote. However, such
amendment generally will not be effective until 12 months after adoption of such
amendment and will not apply to a business combination with an Interested
Stockholder who was such on or prior to the adoption of the amendment. The
Company has not adopted an amendment to its Certificate or By-Laws by which it
elects not to be governed by Section 203 of the DGCL.
 
                       DESCRIPTION OF THE TRUST PREFERRED
                        SECURITIES AND TRUST GUARANTEES
 
TRUST PREFERRED SECURITIES
 
     The Declaration of Trust (the "Declaration") pursuant to which each
Burlington Resources Trust is organized authorizes the trustees (the "Trustees")
of such trust to issue on behalf of such Burlington Resources Trust one series
of Trust Preferred Securities and one series of Trust Common Securities
(together, the "Trust Securities"). Each Declaration will be qualified as an
indenture under the Trust Indenture Act.
 
     The Trust Preferred Securities will have such terms, including
distributions, redemption, voting, conversion, liquidation rights and such other
preferred, deferred or other special rights or such restrictions as shall be set
forth in the applicable Declaration or made part of such Declaration by the
Trust Indenture Act. Reference is made to any Prospectus Supplement relating to
the Trust Preferred Securities of such Burlington Resources Trust for specific
terms, including (i) the distinctive designation of Trust Preferred Securities,
(ii) the number of Trust Preferred Securities issued by such Burlington
Resources Trust, (iii) the annual distribution rate (or method of determining
such rate) for Trust Preferred Securities issued by such Burlington Resources
Trust and the date or dates upon which such distributions shall be payable, (iv)
whether distributions on Trust Preferred Securities issued by such Burlington
Resources Trust shall be cumulative, and, in the case of Trust Preferred
Securities having such cumulative distribution rights, the date or dates or
method of determining the date or dates from which distributions on Trust
Preferred Securities issued by the
 
                                       17
<PAGE>   26
 
Trust shall be cumulative, (v) the amount or amounts which shall be paid out of
the assets of such Burlington Resources Trust to the holder of Trust Preferred
Securities of such Burlington Resources Trust upon voluntary or involuntary
dissolution, winding-up or termination of such Burlington Resources Trust, (vi)
the terms and conditions, if any, under which Trust Preferred Securities of such
Burlington Resources Trust may be converted into shares of Common Stock of the
Company, including the conversion price per share and the circumstances, if any,
under which any such conversion right shall expire, (vii) the terms and
conditions, if any, upon which the related series of the applicable Subordinated
Debt Securities may be distributed to holders of Trust Preferred Securities of
such Trust, (ix) the obligation, if any, of such Burlington Resources Trust to
purchase or redeem Trust Preferred Securities issued by such Burlington
Resources Trust and the price or prices at which, the period or periods within
which and the terms and conditions upon which Trust Preferred Securities issued
by such Burlington Resources Trust shall be purchased or redeemed, in whole or
in part, pursuant to such obligation, (x) the voting rights, if any, of Trust
Preferred Securities issued by such Burlington Resources Trust in addition to
those required by law, including the number of votes per Trust Preferred
Security and any requirement for the approval by the holders of Trust Preferred
Securities, or of Trust Preferred Securities issued by such Burlington Resources
Trust, as a condition to specified action or amendments to the Declaration of
such Burlington Resources Trust, and (xi) any other relevant rights,
preferences, privileges, limitations or restrictions of Trust Preferred
Securities issued by such Burlington Resources Trust consistent with the
Declaration of such Burlington Resources Trust or with applicable law. Pursuant
to each Declaration, the Property Trustee will own the Subordinated Debt
Securities purchased by the applicable Burlington Resources Trust for the
benefit of the holders of the Trust Preferred Securities. The payment of
distributions out of money held by the Burlington Resources Trusts, and payments
upon redemption of Trust Preferred Securities or liquidation of any Burlington
Resources Trust, are guaranteed by the Company to the extent described under
"-- Trust Guarantees."
 
     Certain federal income tax considerations applicable to an investment in
Trust Preferred Securities will be described in the Prospectus Supplement
relating thereto.
 
     In connection with the issuance of Trust Preferred Securities, each
Burlington Resources Trust will also issue one series of Trust Common
Securities. Each Declaration of Trust authorizes the Regular Trustee of a
Burlington Resources Trust to issue on behalf of such Burlington Resources Trust
one series of Trust Common Securities having such terms, including
distributions, conversion, redemption, voting, liquidation rights or such
restrictions as shall be set forth therein. Except as otherwise provided in the
Prospectus Supplement relating to the Trust Preferred Securities, the terms of
the Trust Common Securities issued by such Burlington Resources Trust will be
substantially identical to the terms of each Burlington Resources Trust
Preferred Securities issued by such Burlington Resources Trust, and the Trust
Common Securities will rank pari passu, and payments will be made thereon pro
rata with the Trust Preferred Securities except that, upon an event of default
under the applicable Declaration, the rights of the holders of the Trust Common
Securities to payment in respect of distributions and payments upon liquidation,
redemption and otherwise will be subordinated to the rights of the holders of
the Trust Preferred Securities. Except in certain limited circumstances, the
Trust Common Securities will also carry the right to vote and to appoint, remove
or replace any of the Trustees of a Trust. All of the Trust Common Securities of
each Burlington Resources Trust will be directly or indirectly owned by the
Company.
 
TRUST GUARANTEES
 
     Set forth below is a summary of information concerning the Trust Guarantee
which will be executed and delivered by the Company for the benefit of the
holders from time to time of Trust Preferred Securities. The accompanying
Prospectus Supplement will describe any significant differences between the
actual terms of the Trust Guarantees and the summary below. The summary does not
purport to be complete and is subject in all respects to the provisions of, and
is qualified in its entirety by reference to, the Trust Guarantee, which will be
filed with the Commission and incorporated by reference as an exhibit to the
Registration Statement of which this Prospectus forms a part.
 
     General. The Company will irrevocably and unconditionally agree, to the
extent set forth in the Trust Guarantee, to pay in full, to the holders of Trust
Preferred Securities of each series, the Trust Guarantee
 
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<PAGE>   27
 
Payments (as defined below) (except to the extent paid by such Burlington
Resources Trust), as and when due, regardless of any defense, right of set-off
or counterclaim which such Burlington Resources Trust may have or assert. The
following payments with respect to any series of Trust Preferred Securities to
the extent not paid by the applicable Burlington Resources Trust (the "Trust
Guarantee Payments") will be subject to the Trust Guarantee (without
duplication): (i) any accrued and unpaid dividends which are required to be paid
on the Trust Preferred Securities of such series, to the extent such Burlington
Resources Trust shall have funds legally available therefor, (ii) the redemption
price, including all accrued and unpaid dividends (the "Redemption Price"),
payable out of funds legally available therefor with respect to any Trust
Preferred Securities called for redemption by such Burlington Resources Trust
and (iii) upon a liquidation of such Burlington Resources Trust (other than in
connection with the distribution of Subordinated Debt Securities to the holders
of Trust Preferred Securities or the redemption of all of the Trust Preferred
Securities issued by such Burlington Resources Trust), the lesser of (a) the
aggregate of the liquidation preference and all accrued and unpaid dividends on
the Trust Preferred Securities of such series to the date of payment and (b) the
amount of assets of such Burlington Resources Trust remaining available for
distribution to holders of Trust Preferred Securities of such series in
liquidation of such Burlington Resources Trust. The Company's obligation to make
a Trust Guarantee Payment may be satisfied by direct payment of the required
amounts by the Company to the holders of Trust Preferred Securities or by
causing the applicable Burlington Resources Trust to pay such amounts to such
holders.
 
     Covenants of the Company. In each Trust Guarantee, the Company will
covenant that, so long as any Trust Preferred Securities issued by the
applicable Burlington Resources Trust remain outstanding, if there shall have
occurred any event that would constitute an event of default under such Trust
Guarantee or the Declaration of such Burlington Resources Trust, then (a) the
Company shall not declare or pay any dividend on, make any distributions with
respect to, or redeem, purchase or make a liquidation payment with respect to,
any of its Common Stock (other than (i) purchases or acquisitions of shares of
Common Stock in connection with the satisfaction by the Company of its
obligations under any employee benefit plans, (ii) as a result of a
reclassification of the Company's Common Stock or the exchange or conversion of
one class or series of the Company's Common Stock for another class or series of
the Company's Common Stock, (iii) the purchase of fractional interests in shares
of the Company's Common Stock pursuant to the conversion or exchange provisions
of such Common Stock of the Company or the security being converted or exchanged
or (iv) purchases or acquisitions of shares of Common Stock to be used in
connection with acquisitions of Common Stock by shareholders pursuant to the
Company's dividend reinvestment plan) or make any guarantee payments with
respect to the foregoing and (b) the Company shall not make any payment of
principal or premium, if any, on or repurchase any debt securities (including
guarantees) other than at stated maturity issued by the Company which rank pari
passu with or junior to such Subordinated Debt Securities.
 
     Amendments and Assignment. Except with respect to any changes which do not
adversely affect the rights of holders of Trust Preferred Securities of any
series (in which case no vote will be required), each Trust Guarantee with
respect to any series of Trust Preferred Securities may be changed only with the
prior approval of the holders of not less than a majority in liquidation
preference of the outstanding Trust Preferred Securities of such series. The
manner of obtaining any such approval of holders of the Trust Preferred
Securities of each series will be as set forth in an accompanying Prospectus
Supplement. All guarantees and agreements contained in each Trust Guarantee
shall bind the successors, assigns, receivers, trustees and representatives of
the Company and shall inure to the benefit of the holders of the applicable
series of Trust Preferred Securities then outstanding.
 
     Termination of the Trust Guarantees. Each Trust Guarantee will terminate as
to the Trust Preferred Securities issued by the applicable Burlington Resources
Trust (a) upon full payment of the redemption price of all Trust Preferred
Securities of such Burlington Resources Trust, (b) upon distribution of the
Subordinated Debt Securities held by such Burlington Resources Trust to the
holders of the Trust Preferred Securities of such Burlington Resources Trust or
(c) upon full payment of the amounts payable in accordance with the Declaration
of such Burlington Resources Trust upon liquidation of such Burlington Resources
Trust. Each Trust Guarantee will continue to be effective or will be reinstated,
as the case may be, if at any time any holder of Trust Preferred Securities
issued by the applicable Burlington Resources Trust must restore payment of any
 
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<PAGE>   28
 
sums paid under such Trust Preferred Securities or such Trust Guarantee. The
subordination provisions of the Subordinated Debt Securities and the Trust
Guarantees, respectively, will provide that in the event payment is made on the
Subordinated Debt Securities or the Trust Guarantees in contravention of such
provisions such payments will be paid over to the holders of Senior
Indebtedness.
 
     Ranking of the Trust Guarantee. Each Trust Guarantee will constitute an
unsecured obligation of the Company and will rank (i) subordinate and junior in
right of payment to all other liabilities of the Company, (ii) pari passu with
the most senior preferred or preference stock, if any, hereafter issued by the
Company and with any guarantee hereafter entered into by the Company in respect
of any preferred or preference stock or interests of any affiliate of the
Company and (iii) senior to the Company's Common Stock. Each Declaration will
provide that each holder of Trust Preferred Securities by acceptance thereof
agrees to the subordination provisions and other terms of the applicable Trust
Guarantee.
 
     Each Trust Guarantee will constitute a guarantee of payment and not of
collection. The Trust Guarantee will be deposited with the Property Trustee to
be held for the benefit of any series of Trust Preferred Securities. The
Property Trustee will have the right to enforce the Trust Guarantee on behalf of
the holders of any series of Trust Preferred Securities. The holders of not less
than 10% in aggregate liquidation preference of a series of Trust Preferred
Securities will have the right to direct the time, method and place of
conducting any proceeding for any remedy available in respect of the Trust
Guarantee applicable to such series of Trust Preferred Securities, including the
giving of directions to the Property Trustee. If the Property Trustee fails to
enforce the Trust Guarantee as above provided, any holder of Trust Preferred
Securities of a series to which such Trust Guarantee pertains may institute a
legal proceeding directly against the Company to enforce its rights under the
Trust Guarantee, without first instituting a legal proceeding against Burlington
Resources Trust, or any other person or entity. Each Trust Guarantee will not be
discharged except by payment of the Trust Guarantee Payments in full to the
extent not paid by the applicable Burlington Resources Trust, and by complete
performance of all obligations under such Trust Guarantee.
 
     Governing Law. Each Trust Guarantee will be governed by and construed in
accordance with the laws of the State of New York.
 
                              PLAN OF DISTRIBUTION
 
     The Company or the Burlington Resources Trusts may sell the Securities (i)
through underwriters or dealers; (ii) through agents; (iii) directly to
purchasers; or (iv) through a combination of any such methods of sale. Any such
underwriter, dealer or agent may be deemed to be an underwriter within the
meaning of the Securities Act. The Prospectus Supplement relating to any
offering of Securities will set forth their offering terms, including the name
or names of any underwriters, the purchase price of the Securities and the
proceeds to the Company or the Burlington Resources Trusts from such sale, any
underwriting discounts, commissions and other items constituting underwriters'
compensation, any initial public offering price, and any underwriting discounts,
commissions and other items allowed or reallowed or paid to dealers, and any
securities exchanges on which the Securities may be listed. Only underwriters so
named in such Prospectus Supplement are deemed to be underwriters in connection
with the Securities offered hereby.
 
     If underwriters are used in the sale, the Securities will be acquired by
the underwriters for their own account and may be resold from time to time in
one or more transactions, at a fixed price or prices, which may be changed, or
at market prices prevailing at the time of sale, or at prices related to such
prevailing market prices, or at negotiated prices. The Securities may be offered
to the public either through underwriting syndicates represented by one or more
managing underwriters or directly by one or more of such firms. Unless otherwise
set forth in the Prospectus Supplement, the obligations of the underwriters to
purchase the Securities will be subject to certain conditions precedent and the
underwriters will be obligated to purchase all the offered Securities if any are
purchased. Any initial public offering price and any discounts or concessions
allowed or reallowed or paid to dealers may be changed from time to time.
 
     Any agent involved in the offer or sale of the Securities in respect of
which this Prospectus is delivered will be named, and any commissions payable by
the Company to such agent will be set forth, in the
 
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<PAGE>   29
 
accompanying Prospectus Supplement. Unless otherwise indicated in the Prospectus
Supplement, any such agent will be acting on a best efforts basis for the period
of its appointment.
 
     If so indicated in the Prospectus Supplement, the Company will authorize
underwriters, dealers or agents to solicit offers by certain specified
institutions to purchase Securities from the Company or the Burlington Resources
Trusts at the public offering price set forth in the accompanying Prospectus
Supplement pursuant to delayed delivery contracts providing for payment and
delivery on a specified date in the future. Such contracts will be subject to
any conditions set forth in the accompanying Prospectus Supplement and such
Prospectus Supplement will set forth the commission payable for solicitation of
such contracts. The underwriters and other persons soliciting such contracts
will have no responsibility for the validity or performance of any such
contracts.
 
     Securities offered may be a new issue of securities with no established
trading market. Any underwriters to whom or agents through whom such Securities
are sold by the Company for public offering and sale may make a market in such
Securities, but such underwriters or agents will not be obligated to do so and
may discontinue any market making at any time without notice. No assurance can
be given as to the liquidity of or the trading market for any such Securities.
 
     Underwriters, dealers and agents may be entitled, under agreements entered
into with the Company, to indemnification by the Company against certain civil
liabilities, including liabilities under the Securities Act or to contribution
by the Company to payments they may be required to make in respect thereof.
 
     Certain of the underwriters, agents or dealers and their associates may be
customers of, or engage in transactions with and perform services for the
Company in the ordinary course of business.
 
                                 LEGAL MATTERS
 
     Certain legal matters in connection with the Securities other than the
Trust Securities will be passed upon for the Company by Cahill Gordon & Reindel
(a partnership including a professional corporation), New York, New York, and
for the underwriters, dealers or agents by Cravath, Swaine & Moore, New York,
New York. Certain legal matters in connection with the Trust Securities will be
passed upon for the Company and each Burlington Resources Trust by Richards,
Layton & Finger, P.A., special Delaware counsel to the Company and the
Burlington Resources Trusts. Kenneth W. Orce, a director of the Company, is a
senior partner of Cahill Gordon & Reindel and, as of May 1, 1998, owned 26,877
shares of Common Stock of the Company, including 19,252 currently exercisable
options.
 
                                    EXPERTS
 
     The consolidated financial statements of the Company as of December 31,
1997 and 1996 and for each of the three years in the period ended December 31,
1997 have been incorporated by reference herein and in the Registration
Statement in reliance on the report, which includes an explanatory paragraph for
the change in the Company's method of accounting for the impairment of
long-lived assets in 1995, of Coopers & Lybrand L.L.P., independent accountants,
given upon the authority of such firm as experts in accounting and auditing.
 
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