NOBLE AFFILIATES INC
10-K405/A, 2000-03-28
CRUDE PETROLEUM & NATURAL GAS
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<PAGE>   1

===============================================================================


                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                              -------------------

                                  FORM 10-K/A

                               (Amendment No. 1)

        (Mark One)

           [ X ]   ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

                   FOR THE FISCAL YEAR ENDED DECEMBER 31, 1999

                                       OR

           [   ]   TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
                   For the transition period from _____to_____

                         Commission file number: 0-7062

                             NOBLE AFFILIATES, INC.
             (Exact name of registrant as specified in its charter)

                 Delaware                              73-0785597
         (State of incorporation)        (I.R.S. employer identification number)

            110 West Broadway
            Ardmore, Oklahoma                             73401
 (Address of principal executive offices)              (Zip Code)

              (Registrant's telephone number, including area code)
                                 (580) 223-4110

           SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT:

                                        Name of Each Exchange on
     Title of Each Class                     Which Registered
     -------------------                     -----------------
 Common Stock, $3.33-1/3 par value      New York Stock Exchange, Inc.
  Preferred Stock Purchase Rights       New York Stock Exchange, Inc.

        SECURITIES REGISTERED PURSUANT TO SECTION 12(g) OF THE ACT: None

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the registrant was
required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days.   Yes [ X  ]  No[   ]

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405
of Regulation S-K is not contained herein, and will not be contained, to the
best of the registrant's knowledge, in definitive proxy or information
statements incorporated by reference in Part III of this Form 10-K or any
amendment to this Form 10-K. [ X ]

Aggregate market value of Common Stock held by nonaffiliates as of February 14,
2000: $1,089,000,000.

Number of shares of Common Stock outstanding as of February 14, 2000: 56,328,163

                       DOCUMENT INCORPORATED BY REFERENCE

Portions of the Registrant's definitive proxy statement for the 2000 Annual
Meeting of Stockholders to be held on April 25, 2000, which will be filed with
the Securities and Exchange Commission within 120 days after December 31, 1999,
are incorporated by reference into Part III.

================================================================================

<PAGE>   2
         Item 8 of Noble Affiliates, Inc.'s Annual Report on Form 10-K for the
fiscal year ended December 31, 1999 (the "1999 Form 10-K") is hereby amended.
Such item is set forth herein in its entirety, as amended.

         Item 8 is hereby amended to reflect the correction of the headings on
certain tables contained on pages 54, 55 and 56 of the 1999 Form 10-K, in order
to change the year of such headings from 1999 to 1998 and 1997, where
appropriate and as shown herein.



<PAGE>   3

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA.



                   INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

<TABLE>


<S>                                                                                                        <C>
Report of Independent Public Accountants................................................................   34

Consolidated Balance Sheet as of December 31, 1999 and 1998.............................................   35

Consolidated Statement of Operations for each of the three years in the period ended
  December 31, 1999.....................................................................................   36

Consolidated Statement of Cash Flows for each of the three years in the period ended
  December 31, 1999.....................................................................................   37

Consolidated Statement of Shareholders' Equity for each of the three years in the period ended
  December 31, 1999.....................................................................................   38

Notes to Consolidated Financial Statements..............................................................   39

Supplemental Oil and Gas Information (Unaudited)........................................................   52

Interim Financial Information (Unaudited)...............................................................   58
</TABLE>

All financial statement schedules have been omitted because the required
information is not present or is not present in amounts sufficient to require
submission of the schedule or because the information required is included in
the financial statements, including the notes thereto.



                                       33
<PAGE>   4



REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

To the Shareholders and Board of Directors of Noble Affiliates, Inc.:

      We have audited the accompanying consolidated balance sheet of Noble
Affiliates, Inc. (a Delaware corporation) and subsidiaries as of December 31,
1999 and 1998, and the related consolidated statements of operations,
shareholders' equity and cash flows for each of the three years in the period
ended December 31, 1999. These financial statements are the responsibility of
the Company's management. Our responsibility is to express an opinion on these
financial statements based on our audits.

      We conducted our audits in accordance with auditing standards generally
accepted in the United States. Those standards require that we plan and perform
the audit to obtain reasonable assurance about whether the financial statements
are free of material misstatement. An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the financial statements. An
audit also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation. We believe that our audits provide a reasonable basis
for our opinion.

      In our opinion, the financial statements referred to above present fairly,
in all material respects, the financial position of Noble Affiliates, Inc. and
subsidiaries as of December 31, 1999 and 1998, and the results of their
operations and their cash flows for each of the three years in the period ended
December 31, 1999, in conformity with accounting principles generally accepted
in the United States.


                                                         ARTHUR ANDERSEN LLP


Oklahoma City, Oklahoma
January 28, 2000



                                       34
<PAGE>   5


CONSOLIDATED BALANCE SHEET               NOBLE AFFILIATES, INC. AND SUBSIDIARIES

<TABLE>
<CAPTION>

                                                                                         December 31,
                                                                                   ------------------------------
(in thousands, except share amounts)                                                   1999             1998
                                                                                   -------------    -------------

<S>                                                                                <C>              <C>
ASSETS
CURRENT ASSETS:
  Cash and short-term cash investments                                             $       2,925    $      19,100
  Accounts receivable - trade                                                             98,794          106,513
  Materials and supplies inventories                                                       5,517            3,006
  Other current assets                                                                    40,678           59,670
                                                                                   -------------    -------------
  Total current assets                                                                   147,914          188,289
                                                                                   -------------    -------------

PROPERTY, PLANT AND EQUIPMENT, AT COST:
  Oil and gas mineral interests, equipment and facilities
    (successful efforts method of accounting)                                          2,786,848        2,873,076
  Other                                                                                   43,945           42,841
                                                                                   -------------    -------------
                                                                                       2,830,793        2,915,917
  Accumulated depreciation, depletion and amortization                                (1,588,423)      (1,486,250)
                                                                                   -------------    -------------
    Total property, plant and equipment, net                                           1,242,370        1,429,667
                                                                                   -------------    -------------
INVESTMENT IN UNCONSOLIDATED SUBSIDIARY                                                   15,625           25,061
                                                                                   -------------    -------------
OTHER ASSETS                                                                              44,442           43,063
                                                                                   -------------    -------------
      TOTAL ASSETS                                                                 $   1,450,351    $   1,686,080
                                                                                   -------------    -------------
LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES:
  Accounts payable - trade                                                         $     103,753    $     108,538
  Other current liabilities                                                               48,215           28,815
  Income taxes - current                                                                  32,503            1,813
                                                                                   -------------    -------------
    Total current liabilities                                                            184,471          139,166
                                                                                   -------------    -------------
DEFERRED INCOME TAXES                                                                     83,075          106,823
                                                                                   -------------    -------------
OTHER DEFERRED CREDITS AND NONCURRENT LIABILITIES                                         53,877           52,868
                                                                                   -------------    -------------
LONG-TERM DEBT                                                                           445,319          745,143
                                                                                   -------------    -------------
SHAREHOLDERS' EQUITY:
  Preferred stock - par value $1.00; 4,000,000 shares authorized, none issued
  Common stock - par value $3.33 1/3; 100,000,000 shares authorized;
    58,569,963 and 58,505,908 shares issued in 1999 and 1998, respectively               195,231          195,018
  Capital in excess of par value                                                         360,983          360,008
  Retained earnings                                                                      142,813          102,472
                                                                                   -------------    -------------
                                                                                         699,027          657,498
  Less common stock in treasury, at cost (1999 and 1998, 1,524,900 shares)               (15,418)         (15,418)
                                                                                   -------------    -------------
    Total shareholders' equity                                                           683,609          642,080
                                                                                   -------------    -------------
      TOTAL LIABILITIES AND EQUITY                                                 $   1,450,351    $   1,686,080
                                                                                   -------------    -------------
</TABLE>


See accompanying Notes to Consolidated Financial Statements.



                                       35
<PAGE>   6
CONSOLIDATED STATEMENT OF OPERATIONS    NOBLE AFFILIATES, INC. AND SUBSIDIARIES

<TABLE>
<CAPTION>

                                                            Year ended December 31,
                                                   -----------------------------------------
(in thousands, except per share amounts)               1999           1998           1997
                                                   -----------    -----------    -----------
REVENUES:

<S>                                                <C>            <C>            <C>
  Oil and gas sales and royalties                  $   548,733    $   609,164    $   761,145
  Gathering, marketing and processing                  338,046        284,407        329,868
  Other income                                          23,063         18,045         25,610
                                                   -----------    -----------    -----------
    Total Revenue                                      909,842        911,616      1,116,623
                                                   -----------    -----------    -----------
COSTS AND EXPENSES:
  Oil and gas exploration                               46,784        110,158         86,698
  Oil and gas operations                               116,698        149,030        160,765
  Gathering, marketing and processing                  323,314        270,826        313,807
  Depreciation, depletion and amortization             254,515        313,191        300,354
  Impairment of operating assets                                      223,251
  Selling, general and administrative                   47,859         48,110         50,545
  Interest                                              48,935         50,511         53,008
  Interest capitalized                                  (5,894)        (6,753)        (6,239)
                                                   -----------    -----------    -----------
    Total Expenses                                     832,211      1,158,324        958,938
                                                   -----------    -----------    -----------
INCOME (LOSS) BEFORE TAXES                              77,631       (246,708)       157,685
                                                   -----------    -----------    -----------
INCOME TAX PROVISION (BENEFIT):
  Current                                               24,508        (19,679)        25,569
  Deferred                                               3,662        (63,004)        32,838
                                                   -----------    -----------    -----------
    Total Tax Provision (Benefit)                       28,170        (82,683)        58,407
                                                   -----------    -----------    -----------
NET INCOME (LOSS)                                  $    49,461    $  (164,025)   $    99,278
                                                   -----------    -----------    -----------
BASIC EARNINGS (LOSS) PER SHARE                    $       .87    $     (2.88)   $      1.75
                                                   -----------    -----------    -----------
DILUTED EARNINGS (LOSS) PER SHARE                  $       .86    $     (2.88)   $      1.73
                                                   -----------    -----------    -----------
WEIGHTED AVERAGE SHARES OUTSTANDING:
  Basic                                                 57,005         56,955         56,872
  Diluted                                               57,349         56,955         57,421
                                                   -----------    -----------    -----------
</TABLE>


See accompanying Notes to Consolidated Financial Statements.


                                       36
<PAGE>   7
CONSOLIDATED STATEMENT OF CASH FLOWS     NOBLE AFFILIATES, INC. AND SUBSIDIARIES

<TABLE>
<CAPTION>


                                                                            Year ended December 31,
                                                                 --------------------------------------------
(in thousands)                                                       1999             1998            1997
                                                                 ------------    ------------    ------------
<S>                                                              <C>             <C>             <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net income (loss)                                              $     49,461    $   (164,025)   $     99,278
  Adjustments to reconcile net income to net cash
     provided by operating activities:
   Depreciation, depletion and amortization                           254,515         313,191         300,354
   Impairment of operating assets                                                     223,251
   Amortization of undeveloped leasehold costs, net                     9,645           7,953           8,146
   (Gain) loss on disposal of assets                                  (12,079)         15,434         (11,007)
   Noncurrent deferred income taxes                                   (23,749)        (37,260)         35,650
   (Income) loss from unconsolidated subsidiary                            37
   Increase (decrease) in other deferred credits                        1,011          (3,558)          5,822
   (Increase) decrease in other                                        (1,296)         12,709           1,684
  Changes in working capital, not including cash:
   (Increase) decrease in accounts receivable                           7,719          56,154          43,484
   (Increase) decrease in other current assets                         16,571         (44,423)        (25,053)
   Increase (decrease) in accounts payable                             (4,785)        (55,025)        (29,845)
   Increase (decrease) in other current liabilities                    26,845            (126)         17,058
                                                                 ------------    ------------    ------------
NET CASH PROVIDED BY OPERATING ACTIVITIES                             323,895         324,275         445,571
                                                                 ------------    ------------    ------------
CASH FLOWS FROM INVESTING ACTIVITIES:
  Capital expenditures                                               (122,920)       (431,716)       (326,958)
  Investment in unconsolidated subsidiary                             (51,962)        (25,061)
  Proceeds from the transfer of our interest
    to unconsolidated subsidiary                                       61,987
  Proceeds from sale of property, plant and equipment                  58,137           3,412          54,543
                                                                 ------------    ------------    ------------
NET CASH USED IN INVESTING ACTIVITIES                                 (54,758)       (453,365)       (272,415)
                                                                 ------------    ------------    ------------
CASH FLOWS FROM FINANCING ACTIVITIES:
  Exercise of stock options                                             1,189           2,228           2,744
  Cash dividends paid                                                  (9,120)         (9,113)         (9,100)
  Repayment of bank debt                                             (300,000)                       (549,000)
  Repayment of notes payable - unconsolidated subsidiary              (38,101)
  Proceeds from notes payable - unconsolidated subsidiary              60,720
  Proceeds from issuance of long-term debt                                            100,000         342,507
                                                                 ------------    ------------    ------------
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES                  (285,312)         93,115        (212,849)
                                                                 ------------    ------------    ------------
INCREASE (DECREASE) IN CASH AND SHORT-TERM CASH INVESTMENTS           (16,175)        (35,975)        (39,693)
CASH AND SHORT-TERM CASH INVESTMENTS AT BEGINNING OF YEAR              19,100          55,075          94,768
                                                                 ------------    ------------    ------------
CASH AND SHORT-TERM CASH INVESTMENTS AT END OF YEAR              $      2,925    $     19,100    $     55,075
                                                                 ------------    ------------    ------------
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
  Cash paid during the year for:
  Interest (net of amount capitalized)                           $     44,845    $     43,368    $     46,140
  Income taxes                                                   $     30,000    $      4,276    $     32,415
</TABLE>


See accompanying Notes to Consolidated Financial Statements.



                                       37
<PAGE>   8


                                         NOBLE AFFILIATES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY

<TABLE>
<CAPTION>

                                                                         Capital in      Treasury
                                       Common Stock                      Excess of       Stock at         Retained
(in thousands, except shares issued)  Shares Issued       Amount         Par Value         Cost            Earnings
                                      -------------    -------------   -------------   -------------    -------------

<S>                                   <C>             <C>             <C>              <C>              <C>
JANUARY 1, 1997                          58,321,297    $     194,402   $     355,651   $     (15,418)   $     185,432
Net Income                                                                                                     99,278
Exercise of stock options                   102,141              341           2,403
Cash dividends ($.16 per share)                                                                                (9,100)
                                       ------------    -------------   -------------   -------------    -------------
DECEMBER 31, 1997                        58,423,438    $     194,743   $     358,054   $     (15,418)   $     275,610
                                       ------------    -------------   -------------   -------------    -------------
Net Loss                                                                                                     (164,025)
Exercise of stock options                    82,470              275           1,954
Cash dividends ($.16 per share)                                                                                (9,113)
                                       ------------    -------------   -------------   -------------    -------------
DECEMBER 31, 1998                        58,505,908    $     195,018   $     360,008   $     (15,418)   $     102,472
                                       ------------    -------------   -------------   -------------    -------------

Net Income                                                                                                     49,461
Exercise of stock options                    64,055              213             975
Cash dividends ($.16 per share)                                                                                (9,120)
                                       ------------    -------------   -------------   -------------    -------------
DECEMBER 31, 1999                        58,569,963    $     195,231   $     360,983   $     (15,418)   $     142,813
                                       ------------    -------------   -------------   -------------    -------------
</TABLE>



See accompanying Notes to Consolidated Financial Statements.


                                       38
<PAGE>   9



                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
             (Dollar amounts in tables, unless otherwise indicated,
                  are in thousands, except per share amounts)

NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

CONSOLIDATION

The consolidated accounts include Noble Affiliates, Inc. (the "Company") and the
consolidated accounts of its wholly-owned subsidiaries: Noble Gas Marketing,
Inc. ("NGM"); Noble Trading, Inc. ("NTI"); NPM, Inc.; and Samedan Oil
Corporation ("Samedan"). Listed below are consolidated entities at December 31,
1999.

     NOBLE AFFILIATES, INC.
         Noble Gas Marketing, Inc.
              Noble Gas Pipeline, Inc.
         Noble Trading, Inc.
         NPM, Inc.
         Samedan Oil Corporation
              Samedan of North Africa, Inc.
                  Samedan International
                      Samedan Transfer Sub
                      Samedan, Mediterranean Sea
                      Samedan Power                                      .
              Samedan Pipe Line Corporation
              Samedan Royalty Corporation
              Samedan of Tunisia, Inc.
              Energy Development Corporation ("EDC")
                  EDC Argentina, Inc.
                  EDC Australia, Ltd.
                  EDC China, Inc.
                  EDC Denmark, Inc.
                  EDC Ecuador Ltd.
                  EDC (Europe) Limited
                  EDC HIPS, Inc.
                  EDC Portugal Ltd.
                  Gasdel Pipeline System Incorporated
                  HGC, Inc.
                  Producers Service, Inc.

NATURE OF OPERATIONS

The Company is an independent energy company engaged through its subsidiaries in
the exploration, development, production and marketing of oil and gas. Samedan
operates throughout the major basins in the United States, including the Gulf of
Mexico, as well as international operations in Argentina, China, Ecuador,
Equatorial Guinea, the Mediterranean, the North Sea and the United Kingdom. The
Company markets its oil and gas production through NGM, NTI and Samedan.

USE OF ESTIMATES

The preparation of financial statements in conformity with generally accepted
accounting principles requires management to make estimates and assumptions that
affect the reported amounts of assets and liabilities. Such estimates and
assumptions also affect the disclosure of contingent assets and liabilities at
the date of the financial statements as well as amounts of revenues and expenses
recognized during the reporting period. Of the estimates and assumptions that
affect reported results, the estimate of the Company's oil and gas reserves is
the most significant.



                                       39
<PAGE>   10

FOREIGN CURRENCY TRANSLATION

The U.S. dollar is considered the primary currency for each of the Company's
international operations. Transactions that are completed in a foreign currency
are translated into U.S. dollars and recorded in the financial statements.
Translation gains or losses were not material in any of the periods presented
and are included in other expense on the income statement.

INVENTORIES

Materials and supplies inventories, consisting principally of tubular goods and
production equipment, are stated at the lower of cost or market, with cost being
determined by the first-in, first-out method.

PROPERTY, PLANT AND EQUIPMENT

The Company accounts for its oil and gas properties under the successful efforts
method of accounting. Under this method, costs to acquire mineral interests in
oil and gas properties, to drill and equip exploratory wells that find proved
reserves and to drill and equip development wells are capitalized. Capitalized
costs of producing oil and gas properties are amortized to operations by the
unit-of-production method based on proved developed oil and gas reserves on a
property by property basis as estimated by Company engineers. Estimated future
restoration and abandonment costs are recorded by charges to depreciation,
depletion and amortization ("DD&A") expense over the productive lives of the
related properties. The Company has provided $83.0 million for such future costs
classified with accumulated DD&A in the December 31, 1999, balance sheet. The
total estimated future dismantlement and restoration costs of $123.1 million are
included in future production and development costs for purposes of estimating
the future net revenues relating to the Company's proved reserves. Upon sale or
retirement of depreciable or depletable property, the cost and related
accumulated DD&A are eliminated from the accounts and the resulting gain or loss
is recognized.

Individually significant undeveloped oil and gas properties are periodically
assessed for impairment of value and a loss is recognized at the time of
impairment by providing an impairment allowance. Other undeveloped properties
are amortized on a composite method based on the Company's experience of
successful drilling and average holding period. Geological and geophysical
costs, delay rentals and costs to drill exploratory wells which do not find
proved reserves are expensed. Repairs and maintenance are charged to expense as
incurred.

Developed oil and gas properties and other long-lived assets are periodically
assessed to determine if circumstances indicate that the carrying amount of an
asset may not be recoverable. The Company performs this review of recoverability
by estimating future cash flows. If the sum of the expected future cash flows is
less than the carrying amount of the asset, an impairment is recognized based on
the discounted amount of such cash flows.

INCOME TAXES

The Company files a consolidated federal income tax return. Deferred income
taxes are provided for temporary differences between the financial reporting and
tax bases of the Company's assets and liabilities.

CAPITALIZATION OF INTEREST

The Company capitalizes interest costs associated with the development and
construction of significant properties or projects.



                                       40
<PAGE>   11



STATEMENT OF CASH FLOWS

For purposes of reporting cash flows, cash and short-term investments include
cash on hand and investments purchased with original maturities of three months
or less.

BASIC EARNINGS PER SHARE AND DILUTED EARNINGS PER SHARE

Basic income per share of common stock has been computed on the basis of the
weighted average number of shares outstanding during each period. The diluted
net income per share of common stock includes the effect of outstanding stock
options. The following table summarizes the calculation of basic earnings per
share ("EPS") and diluted EPS components required by SFAS No. 128, as of
December 31:

<TABLE>
<CAPTION>

                                           1999                       1998(1)                       1997
                                ---------------------------  -------------------------    ---------------------------
(in thousands                     Income          Shares       Income         Shares        Income          Shares
except per share amounts)       (Numerator)   (Denominator)  (Numerator)  (Denominator)   (Numerator)   (Denominator)
                                -----------   -------------  -----------  ------------    -----------   -------------

<S>                             <C>         <C>    <C>       <C>         <C>    <C>          <C>       <C>     <C>
Net income/shares                  $49,461          57,005    $(164,025)         56,955       $99,278          56,872

BASIC EPS                                    $.87                        $(2.88)                        $1.75


Net income/shares                  $49,461          57,005    $(164,025)         56,955       $99,278          56,872
Effect of Diluted Securities
   Stock options                                       344                                                        549

Adjusted net income
   and shares                      $49,461          57,349    $(164,025)         56,955       $99,278          57,421

DILUTED EPS                                  $.86                        $(2.88)                        $1.73
</TABLE>

   (1)   In 1998, the diluted EPS is antidilutive as a result of the net
         operating loss; therefore, the basic EPS and diluted EPS are the same.

REVENUE RECOGNITION AND GAS IMBALANCES

Samedan and EDC have gas sales contracts with NGM, whereby Samedan and EDC are
paid an index price for all gas sold to NGM. NGM records sales, including
hedging transactions, as gathering, marketing and processing revenues. NGM
records as cost of sales in gathering, marketing and processing costs, the
amount paid to Samedan, EDC and third parties. All intercompany sales and costs
have been eliminated.

The Company follows an entitlements method of accounting for its gas imbalances.
Gas imbalances occur when the Company sells more or less gas than its entitled
ownership percentage of total gas production. Any excess amount received above
the Company's share is treated as a liability. If less than the Company's
entitlement is received, the underproduction is recorded as a receivable. The
Company records the noncurrent liability in Other Deferred Credits and
Noncurrent Liabilities, and the current liability in Other Current Liabilities.
The Company's gas imbalance liabilities were $12.0 million and $14.8 million for
1999 and 1998, respectively. The Company records the noncurrent receivable in
Other Assets, and the current receivable in Other Current Assets. The Company's
gas imbalance receivables were $17.9 million and $19.1 million for 1999 and
1998, respectively, and are valued at the amount which is expected to be
received.

TAKE-OR-PAY SETTLEMENTS

The Company records gas contract settlements which are not subject to recoupment
in Other Income when the settlement is received.



                                       41
<PAGE>   12



TRADING AND HEDGING ACTIVITIES

The Company, through its subsidiaries, from time to time, uses various hedging
arrangements in connection with anticipated crude oil and natural gas sales to
minimize the impact of product price fluctuations. Such arrangements include
fixed price hedges, costless collars, and other contractual arrangements.
Although these hedging arrangements expose the Company to credit risk, the
Company monitors the creditworthiness of its counterparties, which generally are
major financial institutions, and believes that losses from nonperformance are
unlikely to occur. Hedging gains and losses related to the Company's oil and gas
production are recorded in oil and gas sales and royalties. The swap component
of the contracts discussed in the following paragraphs was treated as a hedge
for accounting purposes only. There was no payment obligation in 1999.

The Company has entered into three crude oil premium swap contracts related to
its production for calendar year 2000. Two of the contracts provide for payments
based on daily NYMEX settlement prices. These contracts relate to 2,500 BBLS per
day and 2,000 BBLS per day and have trigger prices of $21.73 per BBL and $22.45
per BBL, respectively, and both have knockout prices of $17.00 per BBL. These
two contracts entitle the Company to receive settlements from the counterparties
in amounts, if any, by which the settlement price for each NYMEX trading day is
less than the trigger price, provided the NYMEX price is also greater than the
$17.00 per BBL knockout price. If a daily settlement price is $17.00 per BBL or
less, then neither party will have any liability to the other for that day. If a
daily settlement price is above the applicable trigger price, then the Company
will owe the counterparty for the excess of the settlement price over the
trigger price for that day. Payment is made monthly under each of these
contracts, in an amount equal to the net amount due to either party based on the
sum of the daily amounts determined as described in this paragraph for that
month.

The third contract relates to 2,500 BBLS per day and provides for payments based
on monthly average NYMEX settlement prices. The contract entitles the Company to
receive monthly settlements from the counterparty in an amount, if any, by which
the arithmetic average of the daily NYMEX settlement prices for the month is
less than the trigger price, which is $21.73 per BBL, multiplied by the number
of days in the month, provided such average NYMEX price is also greater than the
$17.00 per BBL knockout price. If the average NYMEX settlement price for the
month is $17.00 per BBL or less, then neither party will have any liability to
the other for that month. If the average NYMEX settlement price for the month is
above the trigger price, then the Company will pay the counterparty an amount
equal to the excess of the average settlement price over the trigger price,
multiplied by the number of days in the month.

The Company has treated the swap component of these contracts as a hedge (for
accounting purposes only), at swap prices ranging from $19.40 per BBL to $20.20
per BBL, which existed at the dates it entered into these contracts. In
addition, the Company has separately accounted for the premium component of
these contracts by marking them to market, resulting in a gain of $2,990,000
recorded in other income for the year ended December 31, 1999.

In addition to the premium swap crude oil hedging contracts, the Company has
entered into crude oil costless collar hedges from January 1, 2000, to April 30,
2000, for volumes of 2,000 BBLS per day. These costless collars have a floor
price ranging from $21.53 per BBL to $23.27 per BBL and a cap price ranging from
$25.83 per BBL to $27.31 per BBL. These costless collar contracts entitle the
Company to receive settlements from the counterparties in amounts, if any, by
which the monthly average settlement price for each NYMEX trading day during a
contract month is less than the floor price. If the monthly average settlement
price is above the applicable cap price, then the Company will owe the
counterparties for the excess of the monthly average settlement price over the
applicable cap price. If the monthly average settlement price falls between the
applicable floor and cap price, then neither party will have any liability to
the other party for that month. Payment, if any, is made monthly under each of
the contracts in an amount equal to the net amount due either party based on the
volumes per day multiplied by the difference between the NYMEX average price and
the cap, if the NYMEX average price exceeds the cap price, or if the NYMEX
average price is less than the floor price, then the volumes per day multiplied
by the difference between the floor price and the NYMEX average price.



                                       42
<PAGE>   13



During 1999 and 1998, the Company had no oil or gas hedging transactions for its
production.

During 1997, the Company had natural gas hedging contracts that ranged from 20
percent to 32 percent of its average daily natural gas production. Natural gas
hedges were in the price range of $1.88 per MMBTU to $3.30 per MMBTU. The net
effect of these 1997 hedges was a $.12 per MCF reduction in the average natural
gas price realized by the Company. At December 31, 1997, the Company had no
natural gas hedging contracts for its production.

During 1997, the Company had crude oil hedging contracts that ranged from 19
percent to 50 percent of its average daily oil production. Crude oil hedges were
in the price range of $16.81 per BBL to $24.35 per BBL. The net effect of these
1997 hedges was a $.19 per BBL reduction in the average crude oil price realized
by the Company. At December 31, 1997, the Company had no crude oil hedging
contracts for its production.

In addition to the hedging arrangements pertaining to the Company's production
as described above, Noble Gas Marketing, Inc. ("NGM") employs various hedging
arrangements in connection with its purchases and sales of third party
production to lock in profits or limit exposure to gas price risk. Most of the
purchases made by NGM are on an index basis; however, purchasers in the markets
in which NGM sells often require fixed or NYMEX related pricing. NGM may use a
hedge to convert the fixed or NYMEX sale to an index basis thereby determining
the margin and minimizing the risk of price volatility. During 1999, NGM had
hedging transactions with broker-dealers that ranged from 146,000 MMBTU's to
815,000 MMBTU's of gas per day. At December 31, 1999, NGM had in place hedges
ranging from approximately 10,000 MMBTU's to 776,000 MMBTU's of gas per day for
January 2000 to March 2001 for future physical transactions.

In 1998, NGM had hedging transactions with broker-dealers that ranged from
508,811 MMBTU's to 1,061,536 MMBTU's of gas per day. During 1997, NGM had
hedging transactions with broker-dealers that ranged from 317,693 MMBTU's to
768,599 MMBTU's of gas per day. NGM records hedging gains or losses relating to
fixed term sales as gathering, marketing and processing revenues in the periods
in which the related contract is completed.

SELF-INSURANCE

The Company self-insures the medical and dental coverage provided to certain of
its employees, certain workers' compensation and the first $200,000 of its
general liability coverage.

A provision for self-insured claims is recorded when sufficient information is
available to reasonably estimate the amount of the loss.

UNCONSOLIDATED SUBSIDIARY

The Company has one unconsolidated subsidiary, Atlantic Methanol Capital Company
("AMCCO"), a 50 percent owned joint venture that indirectly owns 90 percent of
Atlantic Methanol Production Company ("AMPCO"), which is constructing a methanol
plant in Equatorial Guinea. AMCCO is accounted for using the equity method
within the Company's wholly-owned subsidiary, Samedan of North Africa, Inc. The
plant construction started during 1998 and is scheduled to be completed during
the second quarter of 2001. The Company's net equity investment in the
unconsolidated subsidiary was $15.6 million at December 31, 1999.

RECLASSIFICATION

Certain reclassifications have been made to the 1997 and 1998 consolidated
financial statements to conform to the 1999 presentation.

RECENTLY ISSUED PRONOUNCEMENTS

The Financial Accounting Standards Board ("FASB") issued Statement of Financial
Accounting Standard ("SFAS") No. 133, "Accounting for Derivative Instruments and
Hedging Activities" in June 1998. The Statement establishes




                                       43
<PAGE>   14


accounting and reporting standards requiring every derivative instrument
(including certain derivative instruments embedded in other contracts) to be
recorded in the balance sheet as either an asset or liability measured at its
fair value. The Statement requires that changes in the derivative's fair value
be recognized currently in earnings unless specific hedge accounting criteria
are met wherein gains and losses are reflected in stockholder equity until the
hedged item is recognized. Special accounting for qualifying hedges allows a
derivative's gains and losses to offset related results on the hedged item in
the income statement, and requires that a company formally document, designate
and assess the effectiveness of transactions that receive hedge accounting.

Due to the issuance of SFAS No. 137, which deferred the effective date of SFAS
No. 133, the Company is required to adopt the statement for fiscal year
beginning after June 15, 2000. A company may also implement the statement as of
the beginning of any fiscal quarter after the statement's issuance (that is,
fiscal quarters beginning June 16, 1998, and thereafter). SFAS No. 133 must be
applied to (a) derivative instruments and (b) certain derivative instruments
embedded in hybrid contracts that were issued, acquired, or substantively
modified after December 31, 1997 (and, at the Company's election, before January
1, 1998). The Company has not quantified the impact of adopting SFAS No. 133 but
plans on adopting the statement by January 1, 2001.

NOTE 2 - DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS

The following methods and assumptions were used to estimate the fair value of
each class of financial instruments pursuant to the requirements of SFAS No.
107, "Disclosures about Fair Value of Financial Instruments."

CASH AND SHORT-TERM INVESTMENTS

The carrying amount approximates fair value due to the short maturity of the
instruments.

OIL AND GAS PRICE HEDGE AGREEMENTS

The fair value of oil and gas price hedges is the estimated amount the Company
would receive or pay to terminate the hedge agreements at the reporting date
taking into account creditworthiness of the hedging parties.

LONG-TERM DEBT

The fair value of the Company's long-term debt is estimated based on the quoted
market prices for the same or similar issues or on the current rates offered to
the Company for debt of the same remaining maturities.

The carrying amounts and estimated fair values of the Company's financial
instruments as of December 31, for each of the years are as follows:

<TABLE>
<CAPTION>

                                                                   1999                            1998
                                                      ----------------------------       ---------------------------
                                                        Carrying              Fair         Carrying             Fair
(in thousands)                                            Amount             Value           Amount            Value
- --------------                                        ----------        ----------       -----------      -----------

<S>                                                   <C>               <C>              <C>              <C>
Cash and short-term investments                       $    2,925        $    2,925       $   19,100       $   19,100
Long-term debt (including current portion)            $  445,319        $  407,500       $  745,143       $  760,750
Oil hedge agreements                                  $                 $   (7,879)      $                $
</TABLE>



                                       44
<PAGE>   15


NOTE 3 - DEBT

A summary of debt at December 31 follows:

<TABLE>
<CAPTION>

(in thousands)                                                                               1999             1998
- --------------                                                                           ----------       ----------

<S>                                                                                      <C>              <C>
$300 million Credit Agreement                                                            $                $  300,000
7 1/4% Notes Due 2023                                                                       100,000          100,000
8% Senior Notes Due 2027                                                                    250,000          250,000
7 1/4% Senior Debentures Due 2097                                                           100,000          100,000
                                                                                         ----------       ----------
Outstanding debt                                                                            450,000          750,000
                                                                                         ----------       ----------
Less: unamortized discount                                                                    4,681            4,857
                                                                                         ----------       ----------
Long-term debt                                                                           $  445,319       $  745,143
                                                                                         ----------       ----------
</TABLE>


The Company's total long-term debt, net of unamortized discount, at December 31,
1999, was $445 million compared to $745 million at December 31, 1998. The ratio
of debt to book capital (defined as the Company's debt plus its equity) was 39
percent at December 31, 1999, compared with 54 percent at December 31, 1998.

The Company's long-term debt is comprised of: $100 million of 7 1/4% Notes Due
2023, $250 million of 8% Senior Notes Due 2027, and $100 million of 7 1/4%
Senior Debentures Due 2097. There is no principal payment due on long term debt
during the next five years.

The Company has a $300 million credit facility which exposes the Company to the
risk of earnings or cash flow loss due to changes in market interest rates. At
December 31, 1999, there was no borrowing against the credit facility which has
a maturity date of December 24, 2002. The interest rate is based upon a
Eurodollar rate plus a range of 17.5 to 50 basis points. At year-end 1998, the
Company had $300 million outstanding on this facility which was repaid during
1999.

On June 17, 1999, the Company entered into a new $100 million 364 day credit
agreement with certain commercial lending institutions. There is no balance
outstanding on this agreement which is based upon a Eurodollar rate plus 37.5 to
87.5 basis points depending upon the percentage of utilization.

On November 11, 1999, the Company announced that AMCCO had sold $125 million
principal amount of its senior secured notes due 2004, without registration
rights, in a private offering to institutional investors. Donaldson, Lufkin and
Jenrette was the placement agent for the offering. Approximately $63 million of
the proceeds, minus transaction expenses, were used to fund a portion of the
Company's obligations to pay the costs of construction of the methanol plant and
related facilities in Equatorial Guinea. The remainder of the proceeds was used
by AMCCO to acquire from the Company, at book value, its subsidiary that held
the Company's ownership interest in the methanol plant project. The Company has
guaranteed payment of interest on the notes and provided certain other credit
support. In addition, the Company established a new series of preferred stock,
Series B Mandatory Convertible Preferred Stock, par value $1.00 per share (the
"Series B Preferred"). The Company issued, in a private placement pursuant to
Section 4(2) of the Securities Act, 125,000 shares of the Series B Preferred to
Noble Share Trust, which is a Delaware statutory business trust, in exchange for
all of the beneficial ownership interests in Noble Share Trust. Noble Share
Trust holds the 125,000 shares of Series B Preferred for the benefit of the
holders of the Series A-2 Notes.

On December 31, 1999, the Company had $23 million outstanding on its note
payable with AMCCO, an unconsolidated subsidiary. The note payable will be
repaid by the second quarter of 2000 and has an interest rate of 8.95 percent.
The note payable is included in other current liabilities.




                                       45
<PAGE>   16


NOTE 4 - INCOME TAXES

The following table details the difference between the federal statutory tax
rate and the effective tax rate for the years ended December 31:

<TABLE>
<CAPTION>

(amounts expressed in percentages)                                          1999             1998              1997
- ----------------------------------                                         ------           ------             -----

<S>                                                                       <C>              <C>                <C>
Statutory rate (benefit)                                                     35.0            (35.0)             35.0
Effect of:
   Percentage depletion                                                                                          (.1)
   State taxes                                                                                 (.2)
   Foreign taxes                                                              1.8               .4                .8
   Losses from international operations                                       1.3               .9               1.4
   Other, net                                                                (1.8)              .4               (.1)
                                                                           ------           ------             -----
Effective rate                                                               36.3            (33.5)             37.0
                                                                           ------           ------             -----
</TABLE>

The net current deferred tax asset (liability) in the following table is
classified as Other Current Assets in the Consolidated Balance Sheet. The tax
effects of temporary differences which gave rise to deferred tax assets and
 liabilities as of December 31 were:

<TABLE>
<CAPTION>

(in thousands)                                                  1999           1998
- --------------                                              -----------    -----------

<S>                                                         <C>            <C>
U.S. and State Current Deferred Tax Assets:
   Accrued expenses                                         $       525    $     1,684
   Deferred income                                                   36          1,386
   Minimum tax                                                                  17,939
   Allowance for doubtful accounts                                  284            304
   Net operating loss carryforward                                               6,710
   Other                                                             14            436
                                                            -----------    -----------
   Net current deferred tax asset                                   859         28,459
                                                            -----------    -----------
U.S. and State Non-current Deferred Tax Liabilities:
   Property, plant and equipment, principally due to
    differences in depreciation, amortization, lease
    impairment and abandonments                                 (84,969)      (104,691)
   Accrued expenses                                               8,041          6,449
   Deferred income                                                2,748          3,306
   Allowance for doubtful accounts                                4,865          3,930
   Income tax accruals                                            9,244         10,465
   Other                                                          2,552          2,448
                                                            -----------    -----------
   Net non-current deferred liability                           (57,519)       (78,093)
                                                            -----------    -----------
   U.S. and state net deferred tax liability                    (56,660)       (49,634)
                                                            -----------    -----------
Foreign Deferred Tax Liabilities:
   Property, plant and equipment of
    foreign operations                                          (25,556)       (28,730)
                                                            -----------    -----------
   Deferred tax liability                                       (25,556)       (28,730)
                                                            -----------    -----------
Total net deferred tax liability                            $   (82,216)   $   (78,364)
                                                            -----------    -----------
</TABLE>

The components of income from operations before income taxes for each year are
as follows:


<TABLE>
<CAPTION>

(in thousands)                                   1999            1998           1997
- --------------                                ---------       ---------      ---------

<S>                                           <C>             <C>            <C>
Domestic                                      $  83,439       $(225,692)     $ 159,535
Foreign                                          (5,808)        (21,016)        (1,850)
                                              ---------       ---------      ---------
                                              $  77,631       $(246,708)     $ 157,685
                                              ---------       ---------      ---------
</TABLE>




                                       46
<PAGE>   17


The income tax provisions (benefit) relating to operations for each year consist
of the following:

<TABLE>
<CAPTION>

(in thousands)                      1999           1998            1997
- --------------                   -----------    -----------    -----------

<S>                              <C>            <C>            <C>
U.S. current                     $    18,962    $   (20,842)   $    22,146
U.S. deferred                          7,151        (62,366)        34,344
State current                            313            236            587
State deferred                          (313)        (1,080)          (622)
Foreign current                        5,232            927          2,836
Foreign deferred                      (3,175)           442           (884)
                                 -----------    -----------    -----------
                                 $    28,170    $   (82,683)   $    58,407
                                 -----------    -----------    -----------
</TABLE>


NOTE 5 - COMMON STOCK, STOCK OPTIONS AND STOCKHOLDER RIGHTS

The Company has two stock option plans, the 1992 Stock Option and Restricted
Stock Plan ("1992 Plan") and the 1988 Non-Employee Director Stock Option Plan
("1988 Plan"). The Company accounts for these plans under APB Opinion 25, under
which no compensation cost has been recognized in the accompanying financial
statements.

Under the Company's 1992 Plan, the Board of Directors may grant stock options
and award restricted stock. No restricted stock has been issued under the 1992
Plan. Since the adoption of the 1992 Plan, stock options have been issued at the
market price on the date of grant. The earliest the granted options may be
exercised is over a three year period at the rate of 33 1/3% each year
commencing on the first anniversary of the grant date. The options expire ten
years from the grant date. The 1992 Plan was amended in 1997, by a vote of the
shareholders, to increase the maximum number of shares of common stock that may
be issued under the 1992 Plan to 4,000,000 shares. At December 31, 1999, the
Company had reserved 3,789,180 shares of common stock for issuance, including
487,945 shares available for grant, under its 1992 Plan.

The Company's 1988 Plan allows stock options to be issued to certain
non-employee directors at the market price on the date of grant. The options may
be exercised one year after issue and expire ten years from the grant date. The
1988 Plan provides for the grant of options to purchase a maximum of 550,000
shares of the Company's authorized but unissued common stock. At December 31,
1999, the Company had reserved 419,000 shares of common stock for issuance,
including 195,500 shares available for grant, under its 1988 Plan.

The Company adopted a stockholder rights plan on August 27, 1997, designed to
assure that the Company's stockholders receive fair and equal treatment in the
event of any proposed takeover of the Company and to guard against partial
tender offers and other abusive takeover tactics to gain control of the Company
without paying all stockholders a fair price. The rights plan was not adopted in
response to any specific takeover proposal. Under the rights plan, the Company
declared a dividend of one right ("Right") on each share of Noble Affiliates,
Inc. common stock. Each Right will entitle the holder to purchase one
one-hundredth of a share of a new Series A Junior Participating Preferred Stock,
par value $1.00 per share, at an exercise price of $150.00. The Rights are not
currently exercisable and will become exercisable only in the event a person or
group acquires beneficial ownership of 15 percent or more of Noble Affiliates,
Inc. common stock. The dividend distribution was made on September 8, 1997, to
stockholders of record at the close of business on that date. The Rights will
expire on September 8, 2007.



                                       47
<PAGE>   18



Stock options outstanding under the plans mentioned above and two previously
terminated plans are presented for the periods indicated.

<TABLE>
<CAPTION>

                                                                                     Number               Option
                                                                                    of Shares           Price Range
                                                                                  -----------          --------------
<S>                                                                               <C>                  <C>
OUTSTANDING DECEMBER 31, 1996                                                       1,602,098          $ 10.63-$40.38
                                                                                  -----------          --------------
  Granted                                                                             707,307          $ 39.63-$39.88
  Exercised                                                                          (102,141)         $ 10.63-$40.38
  Canceled                                                                             (1,929)         $ 24.25-$27.25
                                                                                  -----------          --------------
OUTSTANDING DECEMBER 31, 1997                                                       2,205,335          $ 11.63-$40.38
                                                                                  -----------          --------------
  Granted                                                                             722,604          $ 35.94-$37.75
  Exercised                                                                           (82,470)         $ 11.63-$40.38
  Canceled                                                                            (28,227)         $ 24.25-$40.38
                                                                                  -----------          --------------
OUTSTANDING DECEMBER 31, 1998                                                       2,817,242          $ 13.38-$40.38
                                                                                  -----------          --------------
  Granted                                                                             810,895          $ 20.06-$27,50
  Exercised                                                                           (64,055)         $ 13.38-$24.25
  Canceled                                                                            (85,812)         $ 20.06-$40.38
                                                                                  -----------          --------------
OUTSTANDING DECEMBER 31, 1999                                                       3,478,270          $ 13.50-$40.38
                                                                                  -----------          --------------

EXERCISABLE AT DECEMBER 31, 1999                                                    2,207,545          $ 13.50-$40.38
                                                                                  -----------          --------------
</TABLE>


The SFAS No. 123 method of accounting is based on several assumptions and should
not be viewed as indicative of the operations of the Company in future periods.
The fair value of each option grant is estimated on the date of grant using the
Black-Scholes option pricing model with the following weighted-average
assumptions used for grants in 1999, 1998 and 1997, respectively as follows:

<TABLE>
<CAPTION>

(amounts expressed in percentages)                                            1999             1998              1997
- ----------------------------------                                         --------          --------           -------

<S>                                                                         <C>              <C>               <C>
Interest rate                                                                 5.50             5.75              6.03
Dividend yield                                                                 .40              .40               .40
Expected volatility                                                          42.95            32.66             32.97
Expected life                                                                 8.80             9.74              7.00
</TABLE>

The weighted average fair value of options granted using the Black-Scholes
option pricing model for 1999, 1998 and 1997, respectively is as follows:

<TABLE>
<CAPTION>

(amounts expressed in dollars)                                                1999             1998              1997
- ------------------------------                                             --------          --------           -------
<S>                                                                         <C>              <C>               <C>
Black-Scholes model weighted average fair value
   option price                                                             $10.01           $19.02            $18.28
</TABLE>

The Company applies APB Opinion No. 25 in accounting for its fixed price stock
options. Accordingly, no compensation cost for options has been recognized in
the financial statements. The chart below sets forth the Company's net income
and earnings per share for each of the years ended December 31, as reported and
on a pro forma basis as if the compensation cost of stock options had been
determined consistent with SFAS No. 123, "Accounting for Stock-Based
Compensation."

<TABLE>
<CAPTION>

(in thousands except per share amounts)                                 1999               1998                1997
- ---------------------------------------                                -------          ----------           --------

<S>                                                                    <C>              <C>                  <C>
Net Income:
   As Reported                                                         $49,461          $ (164,025)          $ 99,278
   Pro Forma                                                           $41,176          $ (171,741)          $ 95,591
Basic Earnings Per Share:
   As Reported                                                         $   .87          $    (2.88)          $   1.75
   Pro Forma                                                           $   .72          $    (3.02)          $   1.68
Diluted Earnings Per Share:
   As Reported                                                         $   .86          $    (2.88)          $   1.73
   Pro Forma                                                           $   .72          $    (3.02)          $   1.66
</TABLE>



                                       48
<PAGE>   19





NOTE 6 - EMPLOYEE BENEFIT PLANS

PENSION PLAN AND OTHER POSTRETIREMENT BENEFIT PLANS

The Company has a non-contributory defined benefit pension plan covering
substantially all of its domestic employees. The benefits are based on an
employee's years of service and average earnings for the 60 consecutive calendar
months of highest compensation. The Company also has an unfunded restoration
plan to ensure payments of amounts for which employees are entitled under the
provisions of the pension plan, but which are subject to limitations imposed by
federal tax laws. The Company's funding policy has been to make annual
contributions equal to the actuarially computed liability to the extent such
amounts are deductible for income tax purposes. Plan assets consist of equity
securities and fixed income investments.

The Company sponsors other plans for the benefit of its employees and retirees.
These plans include health care and life insurance benefits. The following table
reflects the required SFAS No. 132, "Employers' Disclosures About Pension and
Other Postretirement Benefits," disclosures at December 31:

<TABLE>
<CAPTION>

                                                           Pension Benefits                     Other Benefits
                                                     ---------------------------         --------------------------
(in thousands)                                          1999              1998             1999              1998
- --------------                                       ---------         ---------         --------          --------

<S>                                                  <C>               <C>               <C>               <C>
CHANGE IN BENEFIT OBLIGATION
Benefit obligation at beginning of year              $  82,823         $  62,487         $  3,187          $  2,384
Service cost                                             3,802             3,811              294               268
Interest cost                                            4,720             4,704              188               185
Plan participants' contributions                                                               38                22
Amendments                                                                   489             (363)
Actuarial (gain) loss                                  (24,294)           14,059             (533)              358
Benefit paid                                            (2,857)           (2,727)             (72)              (30)
                                                     ---------         ---------         --------          --------
Benefit obligation at year end                       $  64,194         $  82,823         $  2,739          $  3,187
                                                     ---------         ---------         --------          --------
CHANGE IN PLAN ASSETS
Fair value of plan assets at beginning of year       $  60,559         $  55,611         $                 $
Actual return on plan assets                             1,083             7,322
Employer contribution                                      383               351               72                30
Benefit paid                                            (2,857)           (2,725)             (72)              (30)
                                                     ---------         ---------         --------          --------
Fair value of plan at end of year                    $  59,168         $  60,559         $                 $
                                                     ---------         ---------         --------          --------
Fund status                                          $  (5,026)        $ (22,264)        $ (2,738)         $ (3,187)
Unrecognized net actuarial loss (gain)                 (18,989)            2,157              222               790
Unrecognized prior service cost                          3,035             3,327             (334)
Unrecognized net transition obligation (assets)          1,239             1,263
                                                     ---------         ---------         --------          --------
Prepaid (accrued) benefit costs                      $ (19,741)        $ (15,517)        $ (2,850)         $ (2,397)
                                                     ---------         ---------         --------          --------
COMPONENTS OF NET PERIODIC BENEFIT COST
Service cost                                         $   3,802         $   3,811         $    294          $    268
Interest cost                                            4,720             4,704              188               185
Expected return on plan assets                          (4,264)           (3,908)
Transition (assets) obligation recognition                  24                24
Amortization of prior service cost                         291               291              (30)
Recognized net actuarial loss                               35               286               34                23
                                                     ---------         ---------         --------          --------
Net periodic benefit cost                            $   4,608         $   5,208         $    486          $    476
                                                     ---------         ---------         --------          --------
WEIGHTED-AVERAGE ASSUMPTIONS AS OF DECEMBER 31,
Discount rate                                            8.00%             6.75%            8.00%             6.75%
Expected return on plan assets                           8.50%             8.50%
Rate of compensation increase                            5.50%             5.50%            5.50%             5.50%
</TABLE>



                                       49
<PAGE>   20
The following table reflects the aggregate pension obligation components
required by SFAS No. 132 for the defined benefit pension plan and the
restoration benefit plan, which are aggregated in the previous tables, at
December 31:

<TABLE>
<CAPTION>
                                             Defined Benefit         Restoration
                                               Pension Plan          Benefit Plan
                                           -------------------    --------------------
(in thousands)                               1999       1998        1999        1998
- -------------                              --------   --------    --------    --------
<S>                                        <C>        <C>         <C>         <C>
AGGREGATED PENSION BENEFITS
Aggregate fair value of plan assets         $59,168    $60,559     $          $
Aggregate accumulated benefit obligation     56,092     68,283       8,102      14,540
                                            -------    -------     -------    --------
Fund status of net periodic
   benefit assets (obligation)              $ 3,076    $(7,724)    $(8,102)   $(14,540)
                                            -------    -------     -------    --------
</TABLE>


Assumed health care cost trend rates have a significant effect on the amounts
reported for health care plans. A one-percentage-point change in assumed health
care cost trend rates would have the following results:

<TABLE>
<CAPTION>
                                             1-Percentage-   1-Percentage-
(in thousands)                               Point increase  Point decrease
- --------------                               --------------  --------------
<S>                                          <C>             <C>
Total service and interest cost components         $  544         $  429
Total postretirement benefit obligation            $3,048         $2,474
</TABLE>

EMPLOYEE SAVINGS PLAN ("ESP")

The Company has an ESP which is a defined contribution plan. Participation in
the ESP is voluntary and all regular employees of the Company are eligible to
participate. The Company may match up to 100 percent of the participant's
contribution not to exceed six percent of the employee's base compensation. The
following table indicates the Company's contribution for the years ended
December 31:

<TABLE>
<CAPTION>
(in thousands)                    1999       1998       1997
- --------------                   ------     ------     ------
<S>                              <C>        <C>        <C>
Employers' plan contribution     $1,823     $1,938     $1,369
</TABLE>

NOTE 7 - ADDITIONAL BALANCE SHEET AND STATEMENT OF OPERATIONS INFORMATION

Included in accounts receivable-trade is an allowance for doubtful accounts at
December 31:

<TABLE>
<CAPTION>
(in thousands)                       1999       1998
- --------------                      ------     ------
<S>                                 <C>        <C>
Allowance for doubtful accounts     $1,237     $1,146
</TABLE>

Other current assets include the following at December 31:

<TABLE>
<CAPTION>
(in thousands)                     1999        1998
- --------------                   -------     -------
<S>                              <C>         <C>
Deferred tax asset               $   859     $28,459
Prepaid federal income taxes     $30,000     $ 4,276
</TABLE>

Other current liabilities include the following at December 31:

<TABLE>
<CAPTION>
(in thousands)                              1999         1998
- --------------                             -------     -------
<S>                                        <C>         <C>
Gas imbalance liabilities                  $ 2,604     $ 4,761
Note payable unconsolidated subsidiary     $23,245     $
Accrued interest payable                   $10,897     $12,251
Louisiana workers compensation             $ 4,751     $ 4,345
</TABLE>

Oil and gas operations expense included the following for the years ended
December 31:

<TABLE>
<CAPTION>
(in thousands)                     1999          1998            1997
- --------------                  ---------      ---------      ---------
<S>                             <C>            <C>            <C>
Lease operating expense         $ 112,997      $ 142,673      $ 151,712
Production taxes                    6,679          8,436         11,947
Other                              (2,978)        (2,079)        (2,894)
                                ---------      ---------      ---------
   Total operations expense     $ 116,698      $ 149,030      $ 160,765
                                ---------      ---------      ---------
</TABLE>


                                       50
<PAGE>   21
Oil and gas exploration expense included the following for the years ended
December 31:

<TABLE>
<CAPTION>
(in thousands)                       1999         1998         1997
- --------------                     --------     --------     --------
<S>                                <C>          <C>          <C>
Dry hole expense                    $19,204     $ 57,736      $46,902
Undeveloped lease amortization        9,645        7,953        8,146
Abandoned assets                      2,483       15,325        4,923
Seismic                               7,797       15,754       19,095
Other                                 7,655       13,390        7,632
                                    -------     --------      -------
   Total exploration expense        $46,784     $110,158      $86,698
                                    -------     --------      -------
</TABLE>

During the past three years, there was no purchaser that accounted for more than
ten percent of total oil and gas sales and royalties.

NOTE 8 - IMPAIRMENT OF LONG-LIVED ASSETS

The Company follows SFAS No. 121 and any assets impaired are oil and gas
properties maintained under the successful efforts method of accounting. The
excess of the net book value over the projected discounted future net revenue of
the impaired properties is charged to "Impairment of Operating Assets." The
Company recorded no asset impairments under SFAS No. 121 during 1999 or 1997. In
December 1998, the Company recorded a $223.3 million pre-tax charge for the
write-down under SFAS No. 121 of properties due to downward reserve revisions.


                                       51
<PAGE>   22


                      SUPPLEMENTAL OIL AND GAS INFORMATION
                                   (Unaudited)

There are numerous uncertainties inherent in estimating quantities of proved oil
and gas reserves. Oil and gas reserve engineering is a subjective process of
estimating underground accumulations of oil and gas that cannot be precisely
measured, and estimates of engineers other than Samedan's might differ
materially from the estimates set forth herein. The accuracy of any reserve
estimate is a function of the quality of available data and of engineering and
geological interpretation and judgment. Results of drilling, testing and
production subsequent to the date of the estimate may justify revision of such
estimate. Accordingly, reserve estimates are often different from the quantities
of oil and gas that are ultimately recovered.

PROVED GAS RESERVES (Unaudited)

The following reserve schedule was developed by the Company's reserve engineers
and sets forth the changes in estimated quantities of proved gas reserves of the
Company during each of the three years presented.


<TABLE>
<CAPTION>
                                                                   Natural Gas and Casinghead Gas (MMCF)
                                       ---------------------------------------------------------------------------------------
                                        United       Other      Equatorial                             United
PROVED RESERVES AS OF:                  States       Int'l        Guinea      Ecuador    Argentina     Kingdom        Total
- ---------------------                  ---------   ----------   ----------   ----------  ----------   ----------    ----------
<S>                                    <C>         <C>          <C>          <C>         <C>          <C>           <C>
JANUARY 1, 1999                          873,222                   321,642                    5,386       39,056     1,239,306
Revisions of previous estimates          (15,700)                   63,478                      482       (2,392)       45,868
Extensions, discoveries and
   other additions                        87,293                                 87,500                      192       174,985
Production                              (150,871)                   (1,018)                    (647)     (10,404)     (162,940)
Sale of minerals in place                (34,165)                                                                      (34,165)
Purchase of minerals in place                  2                                                                             2
- -----------------------------          ---------   ----------   ----------   ----------  ----------   ----------    ----------
DECEMBER 31, 1999                        759,781                   384,102       87,500       5,221       26,452     1,263,056
- -----------------                      ---------   ----------   ----------   ----------  ----------   ----------    ----------

PROVED RESERVES AS OF:
- ---------------------                  ---------   ----------   ----------   ----------  ----------   ----------    ----------
JANUARY 1, 1998                        1,107,158                   322,205                    5,565       47,287     1,482,215
Revisions of previous estimates         (155,314)                      396                       27       (1,030)     (155,921)
Extensions, discoveries and
   other additions                        71,061                                                                        71,061
Production                              (196,220)                     (959)                    (206)      (7,201)     (204,586)
Sale of minerals in place                 (2,232)                                                                       (2,232)
Purchase of minerals in place             48,769                                                                        48,769
- -----------------------------          ---------   ----------   ----------   ----------  ----------   ----------    ----------
DECEMBER 31, 1998                        873,222                   321,642                    5,386       39,056     1,239,306
- -----------------                      ---------   ----------   ----------   ----------  ----------   ----------    ----------

PROVED RESERVES AS OF:
- ---------------------                  ---------   ----------   ----------   ----------  ----------   ----------    ----------
JANUARY 1, 1997                        1,079,607       26,601                                 5,676       44,366     1,156,250
Revisions of previous estimates           (1,228)      (2,554)         545                       (5)         904        (2,338)
Extensions, discoveries and
   other additions                       226,546                   322,205                                 7,025       555,776
Production                              (195,085)      (1,892)        (545)                    (106)      (5,008)     (202,636)
Sale of minerals in place                 (6,934)     (22,299)                                                         (29,233)
Purchase of minerals in place              4,252          144                                                            4,396
- -----------------------------          ---------   ----------   ----------   ----------  ----------   ----------    ----------
DECEMBER 31, 1997                      1,107,158                   322,205                    5,565       47,287     1,482,215
- -----------------                      ---------   ----------   ----------   ----------  ----------   ----------    ----------

PROVED DEVELOPED GAS RESERVES AS OF:
- ------------------------------------
   January 1, 2000                       703,166                    11,687                    5,221       26,452       746,526
   January 1, 1999                       818,787                    12,862                    5,386       39,056       876,091
   January 1, 1998                     1,022,192                    13,425                    5,565       47,287     1,088,469
   January 1, 1997                     1,010,837       26,601                                 5,676       17,981     1,061,095
</TABLE>


                                       52
<PAGE>   23


PROVED OIL RESERVES (Unaudited)

The following reserve schedule was developed by the Company's reserve engineers
and sets forth the changes in estimated quantities of proved oil reserves of the
Company during each of the three years presented.


<TABLE>
<CAPTION>
                                                          Crude Oil  and Condensate (BBLS in thousands)
                                         ------------------------------------------------------------------------------
                                          United        Other       Equatorial                   United
PROVED RESERVES AS OF:                    States        Int'l         Guinea      Argentina      Kingdom        Total
- ----------------------                   --------      --------     ----------    ---------      --------      --------
<S>                                      <C>           <C>          <C>           <C>            <C>           <C>
JANUARY 1, 1999                            77,306                      22,001        11,128         6,146       116,581
Revisions of previous estimates            (1,394)                      9,617           (24)          (57)        8,142
Extensions, discoveries and
   other additions                          3,687         9,768                                       354        13,809
Production                                 (8,952)                       (934)         (819)         (657)      (11,362)
Sale of minerals in place                  (5,125)                                                               (5,125)
Purchase of minerals in place                   1                                                                     1
                                         --------      --------      --------      --------      --------      --------
DECEMBER 31, 1999                          65,523         9,768        30,684        10,285         5,786       122,046
                                         --------      --------      --------      --------      --------      --------

PROVED RESERVES AS OF:
- ----------------------
JANUARY 1, 1998                            89,065                      22,766        11,997         7,035       130,863
Revisions of previous estimates            (5,935)                        166            16          (129)       (5,882)
Extensions, discoveries and
   other additions                          4,802                                                      35         4,837
Production                                (11,540)                       (931)         (885)         (795)      (14,151)
Sale of minerals in place                    (155)                                                                 (155)
Purchase of minerals in place               1,069                                                                 1,069
                                         --------      --------      --------      --------      --------      --------
DECEMBER 31, 1998                          77,306                      22,001        11,128         6,146       116,581
                                         --------      --------      --------      --------      --------      --------

PROVED RESERVES AS OF:
- ----------------------
JANUARY 1, 1997                            82,317         3,435         8,276        13,007         8,712       115,747
Revisions of previous estimates             1,516         1,676           117          (133)         (795)        2,381
Extensions, discoveries and
   other additions                         16,501            (1)       15,212                                    31,712
Production                                (11,450)         (426)         (839)         (877)         (882)      (14,474)
Sale of minerals in place                    (184)       (4,797)                                                 (4,981)
Purchase of minerals in place                 365           113                                                     478
                                         --------      --------      --------      --------      --------      --------
DECEMBER 31, 1997                          89,065                      22,766        11,997         7,035       130,863
                                         --------      --------      --------      --------      --------      --------

PROVED DEVELOPED OIL RESERVES AS OF:
- ------------------------------------
   January 1, 2000                         60,618         9,768        14,743        10,285         3,986        99,400
   January 1, 1999                         72,949                      11,425        11,128         4,346        99,848
   January 1, 1998                         82,713                      12,191        11,997         5,234       112,135
   January 1, 1997                         78,564         3,322         6,956        13,007         6,049       107,898
</TABLE>
- ------------------

Proved Reserves. Proved reserves are estimated quantities of crude oil, natural
gas, natural gas liquids and condensate liquids which geological and engineering
data demonstrate with reasonable certainty to be recoverable in future years
from known reservoirs under existing economic and operating conditions.

Proved Developed Reserves. Proved developed reserves are proved reserves which
are expected to be recovered through existing wells with existing equipment and
operating methods.


                                       53
<PAGE>   24
OIL AND GAS OPERATIONS (Unaudited)

Aggregate results of operations for each period ended December 31, in connection
with the Company's oil and gas producing activities are shown below. Amounts are
presented in accordance with SFAS No. 19, and may not agree with amounts
determined using traditional industry definitions.

<TABLE>
<CAPTION>
(in thousands)
- --------------
                                      United       Other       Equatorial                                  United
DECEMBER 31, 1999                     States       Int'l         Guinea       Ecuador      Argentina       Kingdom         Total
- ----------------------------------  ---------    ---------     ----------   ----------     ---------      ---------      ---------
<S>                                 <C>          <C>           <C>          <C>            <C>            <C>            <C>
Revenues                            $ 493,718    $             $   16,036   $              $  14,302      $  24,677      $ 548,733
Production costs                      125,803                       3,183                      4,640          7,106        140,732
Exploration expenses                   45,461        2,779            196          130           542          4,270         53,378
DD&A and valuation provision          231,157          849          3,212           16         6,401         19,687        261,322
                                    ---------    ---------     ----------    ---------     ---------      ---------      ---------
Income (loss)                          91,297       (3,628)         9,445         (146)        2,719         (6,386)        93,301
Income tax expense (benefit)           31,646       (1,094)         4,428                      1,651          (733)        35,898
                                    ---------    ---------     ----------    ---------     ---------      ---------      ---------
Result of operations from
   producing activities (excluding
   corporate overhead and interest
   costs)                           $  59,651    $  (2,534)    $    5,017    $    (146)    $   1,068      $  (5,653)     $  57,403
                                    ---------    ---------     ----------    ---------     ---------      ---------      ---------
</TABLE>

<TABLE>
<CAPTION>
(in thousands)
- --------------
                                      United      Other        Equatorial                                  United
DECEMBER 31, 1998                     States      Int'l          Guinea        Ecuador     Argentina       Kingdom         Total
- ----------------------------------  ---------   ---------      ----------    ----------    ---------      ---------      ---------
<S>                                 <C>         <C>            <C>           <C>           <C>            <C>            <C>
Revenues                            $ 564,771   $               $   10,282     $           $   9,105      $  25,006      $ 609,164
Production costs                      154,594                        2,962                     6,274          9,044        172,874
Exploration expenses                   90,614        9,987             658                        87          5,828        107,174
DD&A and valuation provision          513,725           46           2,998                     6,083         13,869        536,721*
                                    ---------    ---------      ----------     ---------   ---------      ---------      ---------
Income (loss)                        (194,162)     (10,033)          3,664                    (3,339)        (3,735)      (207,605)
Income tax expense (benefit)          (68,764)      (2,489)          1,786                    (1,822)          (794)       (72,083)
                                    ---------    ---------      ----------     ---------   ---------      ---------      ---------
Result of operations from
   producing activities (excluding
   corporate overhead and interest
   costs)                           $(125,398)   $  (7,544)     $    1,878     $           $  (1,517)     $  (2,941)     $(135,522)
                                    ---------    ---------      ----------     ---------   ---------      ---------      ---------
</TABLE>
     *Includes a pre-tax charge of $223.3 million pursuant to SFAS No. 121.

<TABLE>
<CAPTION>
(in thousands)
- --------------
                                        United        Other      Equatorial                                United
DECEMBER 31, 1997                       States        Int'l        Guinea       Ecuador      Argentina     Kingdom        Total
- -----------------------------------    --------     --------     ----------    ----------    ---------     --------      --------
<S>                                    <C>          <C>          <C>           <C>           <C>           <C>           <C>
Revenues                               $696,882     $  9,944      $ 14,824     $              $ 14,777     $ 24,718      $761,145
Production costs                        164,441        4,778         3,600                       5,555        8,220       186,594
Exploration expenses                     56,177       12,345         3,464                         804        7,942        80,732
DD&A and valuation provision            280,862        2,642         1,889                       5,037       12,399       302,829
                                       --------     --------      --------     ----------     --------     --------      --------
Income (loss)                           195,402       (9,821)        5,871                       3,381       (3,843)      190,990
Income tax expense (benefit)             67,934       (4,470)        4,654                       2,680       (3,047)       67,751
                                       --------     --------      --------     ----------     --------     --------      --------
Result of operations from
   producing activities (excluding
   corporate overhead and interest
   costs)                              $127,468     $ (5,351)     $  1,217     $              $    701     $   (796)     $123,239
                                       --------     --------      --------     ----------     --------     --------      --------
</TABLE>


                                       54
<PAGE>   25
COSTS INCURRED IN OIL AND GAS ACTIVITIES (Unaudited)

Costs incurred in connection with the Company's oil and gas acquisition,
exploration and development activities for each of the years are shown below.
Amounts are presented in accordance with SFAS No. 19, and may not agree with
amounts determined using traditional industry definitions.

<TABLE>
<CAPTION>
(in thousands)
- --------------
                                       United      Other      Equatorial                                  United
DECEMBER 31, 1999                      States      Int'l        Guinea        Ecuador     Argentina       Kingdom         Total
- ----------------------------------   ----------  ----------   ----------     ----------   ----------     ----------     ----------
<S>                                  <C>         <C>          <C>            <C>          <C>            <C>            <C>
Property acquisition costs
   Proved                            $       69  $            $              $            $              $              $       69
   Unproved                               7,280         620                                                                  7,900
                                     ----------  ----------   ----------     ----------   ----------     ----------     ----------
Total                                $    7,349  $      620   $              $            $              $              $    7,969
                                     ----------  ----------   ----------     ----------   ----------     ----------     ----------
Exploration costs                    $   43,999  $    7,382   $      123     $      130   $      340     $    3,229     $   55,203
                                     ----------  ----------   ----------     ----------   ----------     ----------     ----------
Development costs                    $   48,042  $    1,012   $    1,748     $    2,569   $    3,851     $    4,972     $   62,194
                                     ----------  ----------   ----------     ----------   ----------     ----------     ----------
</TABLE>

<TABLE>
<CAPTION>
(in thousands)
- --------------
                                       United      Other      Equatorial                                  United
DECEMBER 31, 1998                      States      Int'l        Guinea        Ecuador     Argentina       Kingdom         Total
- ----------------------------------   ----------  ----------   ----------     ----------   ----------     ----------     ----------
<S>                                  <C>         <C>          <C>            <C>          <C>            <C>            <C>
Property acquisition costs
   Proved                            $   48,444  $            $              $            $              $              $   48,444
   Unproved                              36,760         500                                                     311         37,571
                                     ----------  ----------   ----------     ----------   ----------     ----------     ----------
Total                                $   85,204  $      500   $              $            $              $      311     $   86,015
                                     ----------  ----------   ----------     ----------   ----------     ----------     ----------
Exploration costs                    $  132,958  $    9,663   $      465     $            $      473     $    5,328     $  148,887
                                     ----------  ----------   ----------     ----------   ----------     ----------     ----------
Development costs                    $  242,838  $   10,251   $   10,977     $            $    7,918     $    9,761     $  281,745
                                     ----------  ----------   ----------     ----------   ----------     ----------     ----------
</TABLE>

<TABLE>
<CAPTION>
(in thousands)
- --------------
                                       United      Other      Equatorial                                  United
DECEMBER 31, 1997                      States      Int'l        Guinea        Ecuador     Argentina       Kingdom         Total
- ----------------------------------   ----------  ----------   ----------     ----------   ----------     ----------     ----------
<S>                                  <C>         <C>          <C>            <C>          <C>            <C>            <C>
Property acquisition costs
    Proved                           $    3,884  $       28   $              $            $              $              $    3,912
    Unproved                             16,668       3,178                                                                 19,846
                                     ----------  ----------   ----------     ----------   ----------     ----------     ----------
Total                                $   20,552  $    3,206   $              $            $              $              $   23,758
                                     ----------  ----------   ----------     ----------   ----------     ----------     ----------
Exploration costs                    $   81,141  $   14,528   $    9,907     $            $              $   11,588     $  117,164
                                     ----------  ----------   ----------     ----------   ----------     ----------     ----------
Development costs                    $  201,788  $    1,538   $    2,871     $            $    5,558     $    4,213     $  215,968
                                     ----------  ----------   ----------     ----------   ----------     ----------     ----------
</TABLE>

AGGREGATE CAPITALIZED COSTS (Unaudited)

Aggregate capitalized costs relating to the Company's oil and gas producing
activities, and related accumulated DD&A, as of December 31 are shown below:

<TABLE>
<CAPTION>
                                                       1999                                               1998
                                   ---------------------------------------------      ---------------------------------------------
(in thousands)                         U. S.           Int'l            TOTAL            U. S.            Int'l            TOTAL
- -------------------------------    -----------      -----------      -----------      -----------      -----------      -----------
<S>                                <C>              <C>              <C>              <C>              <C>              <C>
Unproved oil and gas properties    $    79,823      $    13,288      $    93,111      $    86,844      $    15,302      $   102,146
Proved oil and gas properties        2,389,937          303,800        2,693,737        2,507,767          263,163        2,770,930
                                   -----------      -----------      -----------      -----------      -----------      -----------
                                     2,469,760          317,088        2,786,848        2,594,611          278,465        2,873,076
Accumulated DD&A                    (1,471,889)         (88,154)      (1,560,043)      (1,401,218)         (59,357)      (1,460,575)
                                   -----------      -----------      -----------      -----------      -----------      -----------
Net capitalized costs              $   997,871      $   228,934      $ 1,226,805      $ 1,193,393      $   219,108      $ 1,412,501
                                   -----------      -----------      -----------      -----------      -----------      -----------
</TABLE>


                                       55
<PAGE>   26
STANDARDIZED MEASURE OF DISCOUNTED FUTURE NET CASH FLOWS RELATING TO PROVED OIL
AND GAS RESERVES (Unaudited)

The following information is based on the Company's best estimate of the
required data for the Standardized Measure of Discounted Future Net Cash Flows
as of December 31, 1999, 1998 and 1997 in accordance with SFAS No. 69. The
Standard requires the use of a 10 percent discount rate. This information is not
the fair market value nor does it represent the expected present value of future
cash flows of the Company's proved oil and gas reserves.

<TABLE>
<CAPTION>
                                       United       Other     Equatorial                                 United
DECEMBER 31, 1999                      States       Int'l       Guinea     Ecuador       Argentina       Kingdom         Total
- ----------------------------------   ----------   ----------  ----------  ----------     ----------     ----------     ----------
<S>                                  <C>          <C>         <C>         <C>            <C>            <C>            <C>
(in millions of dollars)
Future cash inflows                  $    3,565   $      220  $      779  $      320     $      243     $      181     $    5,308
Future production and
    development costs                     1,566          105         189          73            102             85          2,120
Future income tax expenses                  376           22         111          46             27             18            600
                                     ----------   ----------  ----------  ----------     ----------     ----------     ----------
Future net cash flows                     1,623           93         479         201            114             78          2,588
10% annual discount for
    estimated timing of cash flows          686           39         203          85             49             33          1,095
                                     ----------   ----------  ----------  ----------     ----------     ----------     ----------
Standardized measure of
    discounted future net
    cash flows                       $      937   $       54  $      276  $      116     $       65     $       45     $    1,493
                                     ----------   ----------  ----------  ----------     ----------     ----------     ----------
</TABLE>

<TABLE>
<CAPTION>
                                       United       Other     Equatorial                                 United
DECEMBER 31, 1998                      States       Int'l       Guinea     Ecuador       Argentina       Kingdom         Total
- ----------------------------------   ----------   ----------  ----------  ----------     ----------     ----------     ----------
<S>                                  <C>          <C>         <C>         <C>            <C>            <C>            <C>
(in millions of dollars)
Future cash inflows                  $    2,647   $           $      301  $              $       96     $      113     $    3,157
Future production and
    development costs                     1,146                      140                         30             62          1,378
Future income tax expenses                  182                       19                          8              6            215
                                     ----------   ----------  ----------  ----------     ----------     ----------     ----------
Future net cash flows                     1,319                      142                         58             45          1,564
10% annual discount for
    estimated timing of cash flows          490                       53                         22             17            582
                                     ----------   ----------  ----------  ----------     ----------     ----------     ----------
Standardized measure of
    discounted future net
    cash flows                       $      829   $           $       89  $              $       36     $       28     $      982
                                     ----------   ----------  ----------  ----------     ----------     ----------     ----------
</TABLE>

<TABLE>
<CAPTION>
                                       United       Other     Equatorial                                 United
DECEMBER 31, 1997                      States       Int'l       Guinea     Ecuador       Argentina       Kingdom         Total
- ----------------------------------   ----------   ----------  ----------  ----------     ----------     ----------     ----------
<S>                                  <C>          <C>         <C>         <C>            <C>            <C>            <C>
(in millions of dollars)
Future cash inflows                  $    4,330   $           $      498  $              $      196     $      259     $    5,283
Future production and
    development costs                     2,040                      148                        121             61          2,370
Future income tax expenses                  612                       93                         20             53            778
                                     ----------   ----------  ----------  ----------     ----------     ----------     ----------
Future net cash flows                     1,678                      257                         55            145          2,135
10% annual discount for
    estimated timing of cash flows          615                       95                         20             53            783
                                     ----------   ----------  ----------  ----------     ----------     ----------     ----------
Standardized measure of
    discounted future net
    cash flows                       $    1,063   $           $      162  $              $       35     $       92     $    1,352
                                     ----------   ----------  ----------  ----------     ----------     ----------     ----------
</TABLE>


     Construction of AMPCO's Equatorial Guinea methanol plant is scheduled to be
completed in the second quarter of 2001. The future net cash inflows for 1998
and 1999 do not include cash flows relating to the Company's anticipated future
methanol sales. For more information regarding Samedan's methanol plant, see
Item 1. "Business--Unconsolidated Subsidiary" and Item 2. "Properties--Oil and
Gas" of this Form 10-K.


                                       56
<PAGE>   27
Future cash inflows are estimated by applying year-end prices of oil and gas
relating to the Company's proved reserves to the year-end quantities of those
reserves, with consideration given to the effect of existing hedging contracts,
if any.

The year-end weighted average oil market price utilized in the computation of
future cash inflows was approximately $23.62 per BBL. West Texas intermediate
crude oil price in mid February was approximately $27.25 per BBL, an increase of
$3.63 per BBL compared to year-end 1999. The Company estimates that a $1.00 per
BBL change in the average oil price from the year-end price would change
discounted future net cash flows before income taxes by approximately $67
million.

The year-end weighted average gas market price utilized in the computation of
future cash inflows was approximately $2.15 per MCF. Natural gas index prices at
Henry Hub have increased approximately $.41 per MCF to $2.56 per MCF in mid
February compared with the year-end price. The Company estimates that a $.10 per
MCF change in the average gas price from the year-end price would change
discounted future net cash flows before income taxes by approximately $68
million.

Future production and development costs, which include dismantlement and
restoration expense, are computed by estimating the expenditures to be incurred
in developing and producing the Company's proved oil and gas reserves at the end
of the year, based on year-end costs, and assuming continuation of existing
economic conditions.

Future income tax expenses are computed by applying the appropriate year-end
statutory tax rates to the estimated future pretax net cash flows relating to
the Company's proved oil and gas reserves, less the tax bases of the properties
involved. The future income tax expenses give effect to tax credits and
allowances, but do not reflect the impact of general and administrative costs
and exploration expenses of ongoing operations relating to the Company's proved
oil and gas reserves.

At December 31, 1999, the Company had estimated gas imbalance receivables of
$17.9 million and estimated gas imbalance liabilities of $12.0 million; at
year-end 1998, $19.1 million in receivables and $14.8 million in liabilities;
and at year-end 1997, $18.5 million in receivables and $21.6 million in
liabilities. Neither the gas imbalance receivables nor gas imbalance liabilities
have been included in the standardized measure of discounted future net cash
flows as of each of the three years ended December 31, 1999, 1998 and 1997.


                                       57
<PAGE>   28
SOURCES OF CHANGES IN DISCOUNTED FUTURE NET CASH FLOWS (Unaudited)

Principal changes in the aggregate standardized measure of discounted future net
cash flows attributable to the Company's proved oil and gas reserves, as
required by Financial Accounting Standards Board's SFAS No. 69, at year end are
shown below.

<TABLE>
<CAPTION>
(in millions of dollars)                         1999         1998         1997
- ------------------------------------------     -------      -------      -------
<S>                                            <C>          <C>          <C>
Standardized measure of discounted
   future net cash flows at the beginning
   of the year                                 $   982      $ 1,352      $ 2,222
Extensions, discoveries and improved
   recovery, less related costs                    410           39          501
Revisions of previous quantity estimates            89         (132)          13
Changes in estimated future
   development costs                              (202)         (17)         (15)
Purchases (sales) of minerals in place             (58)          46          (45)
Net changes in prices and production costs         673         (443)      (1,259)
Accretion of discount                              102          189          310
Sales of oil and gas produced, net of
   production costs                               (425)        (454)        (594)
Development costs incurred during
   the period                                       21          127           38
Net change in income taxes                        (317)         503          332
Change in timing of estimated future
   production, and other                           218         (228)        (151)
                                               -------      -------      -------
Standardized measure of discounted
   future net cash flows at the end
   of the year                                 $ 1,493      $   982      $ 1,352
- ------------------------------------------     -------      -------      -------
</TABLE>

INTERIM FINANCIAL INFORMATION (Unaudited)

Interim financial information for the years ended December 31, 1999 and 1998 is
as follows:

<TABLE>
<CAPTION>
                                                                   Quarter Ended
                                              ----------------------------------------------------------
(in thousands except per share amounts)        Mar. 31,        June 30,       Sept. 30,      Dec. 31,(1)
- ---------------------------------------       ----------      ----------     ----------      -----------
<S>                                           <C>             <C>            <C>             <C>
1999
Revenues                                      $  175,865      $  216,245     $  241,971      $  252,698
Gross profit from operations                  $      128      $   22,959     $   41,453      $   38,087
Net income                                    $   (8,901)     $    9,179     $   27,654      $   21,529
Basic earnings per share                      $     (.16)     $      .16     $      .49      $      .38
Diluted earnings per share                    $     (.16)     $      .16     $      .48      $      .38
1998
Revenues                                      $  246,535      $  237,392     $  205,803      $  203,841
Gross profit (loss) from operations           $   31,838      $   27,326     $  (25,616)     $ (235,922)
Net income                                    $   13,718      $   12,135     $  (25,150)     $ (164,728)
Basic earnings per share                      $      .24      $      .21     $     (.44)     $    (2.89)
Diluted earnings per share                    $      .24      $      .21     $     (.44)     $    (2.89)
</TABLE>


(1)  During the fourth quarters of 1999 and 1998, DD&A expense increased $7.6
     million and $9.8 million, respectively, relating to the cumulative effect
     of oil and gas reserve revisions on the DD&A provision for the preceding
     three quarters.



                                       58
<PAGE>   29
                                   SIGNATURES

Pursuant to the requirements of Section 27 or 15(d) of the Securities Exchange
Act of 1934, the Registrant has duly caused this Amendment No. 1 to be signed on
its behalf by the undersigned, thereunto duly authorized.

                                   NOBLE AFFILIATES, INC.

Date: March 27, 2000               By: /s/ James L. McElvany
                                   ---------------------------------------------
                                   James L. McElvany,
                                   Vice President-Finance and Treasurer

Pursuant to the requirements of the Securities Exchange Act of 1934, this
Amendment No. 1 has been signed below by the following persons on behalf of the
Registrant and in the capacities and on the dates indicated.

<TABLE>
<CAPTION>
Signature                                          Capacity in which signed                       Date
- ---------                                          ------------------------                       ----
<S>                                                <C>                                       <C>

/s/ Robert Kelley                                  Chairman of the Board, President,         March 27, 2000
- ------------------------------------               Chief Executive Officer and
Robert Kelley                                      Director (Principal Executive
                                                   Officer)


/s/ James L. McElvany                              Vice President-Finance and Treasurer      March 27, 2000
- ------------------------------------               (Principal Financial and Accounting
James L. McElvany                                  Officer)


/s/ Alan A. Baker                                  Director                                  March 27, 2000
- ------------------------------------
Alan A. Baker

/s/ Michael A. Cawley                              Director                                  March 27, 2000
- ------------------------------------
Michael A. Cawley

/s/ Edward F. Cox                                  Director                                  March 27, 2000
- ------------------
Edward F. Cox

/s/ Thomas E. Hassen                               Director                                  March 27, 2000
- ------------------------------------
Thomas E. Hassen

/s/ Dale P. Jones                                  Director                                  March 27, 2000
- ------------------------------------
Dale P. Jones

/s/ Harold F. Kleinman                             Director                                  March 27, 2000
- ------------------------------------
Harold F. Kleinman

/s/ T. Don Stacy                                   Director                                  March 27, 2000
- ------------------------------------
T. Don Stacy
</TABLE>


                                       60
<PAGE>   30
                                INDEX TO EXHIBITS

<TABLE>
<CAPTION>




Exhibit
Number                                  Exhibit **
- ------                                  ----------
<S>     <C>    <C>
3.1     --     Certificate of Incorporation, as amended, of the Registrant as
               currently in effect (filed as Exhibit 3.2 to the Registrant's
               Annual Report on Form 10-K for the year ended December 31, 1987
               and incorporated herein by reference).

3.2     --     Certificate of Designations of Series A Junior Participating
               Preferred Stock of the Registrant dated August 27, 1997 (filed
               Exhibit A of Exhibit 4.1 to the Registrant's Registration
               Statement on Form 8-A filed on August 28, 1997 and incorporated
               herein by reference).

3.3     --     Composite copy of Bylaws of the Registrant as currently in effect
               (filed as Exhibit 3.4 to the Registrants' Annual Report on Form
               10-K for the year ended December 31, 1997 and incorporated herein
               by reference).

3.4     --     Certificate of Designations of Series B Mandatorily Convertible
               Preferred Stock of the Registrant dated November 9, 1999.

4.1     --     Indenture dated as of October 14, 1993 between the Registrant and
               U.S. Trust Company of Texas, N.A., as Trustee, relating to the
               Registrant's 7 1/4% Notes Due 2023, including form of the
               Registrant's 7 1/4% Notes Due 2023 (filed as Exhibit 4.1 to the
               Registrant's Quarterly Report on Form 10-Q for the quarter ended
               September 30, 1993 and incorporated herein by reference).

4.2     --     Indenture relating to Senior Debt Securities dated as of April 1,
               1997 between the Registrant and U.S. Trust Company of Texas,
               N.A., as Trustee (filed as Exhibit 4.1 to the Registrant's
               Quarterly Report on Form 10-Q for the quarter ended March 31,
               1997 and incorporated herein by reference).

4.3     --     First Indenture Supplement relating to $250 million of the
               Registrant's 8% Senior Notes Due 2027 dated as of April 1, 1997
               between the Registrant and U.S. Trust Company of Texas, N.A., as
               Trustee (filed as Exhibit 4.2 to the Registrant's Quarterly
               Report on Form 10-Q for the quarter ended March 31, 1997 and
               incorporated herein by reference).

4.4     --     Second Indenture Supplement, between the Company and U.S. Trust
               Company of Texas, N.A. as trustee, relating to $100 million of
               the Registrant's 7 1/4% Senior Debentures Due 2097 dated as of
               August 1, 1997 (filed as Exhibit 4.1 to the Registrant's
               Quarterly Report on Form 10-Q for the quarter ended June 30, 1997
               and incorporated herein by reference).

4.5     --     Rights Agreement, dated as of August 27, 1997, between the
               Registrant and Liberty Bank and Trust Company of Oklahoma City,
               N.A., as Right's Agent (filed as Exhibit 4.1 to the Registrant's
               Registration Statement on Form 8-A filed on August 28, 1997 and
               incorporated herein by reference).

4.6     --     Amendment No. 1 to Rights Agreement dated as of December 8, 1998,
               between the Registrant and Bank One Trust Company, as successor
               Rights Agent to Liberty Bank and Trust Company of Oklahoma City,
               N.A. (filed as Exhibit 4.2 to the Registrant's Registration
               Statement on Form 8-A/A (Amendment No. 1) filed on December 14,
               1998 and incorporated herein by reference).

10.1*   --     Samedan Oil Corporation Bonus Plan, as amended and restated on
               September 24, 1996 (filed as Exhibit 10.1 to the Registrant's
               Annual Report on Form 10-K for the fiscal year ended December 31,
               1996 and incorporated herein by reference).

10.2*   --     Restoration of Retirement Income Plan for certain participants in
               the Noble Affiliates Retirement Plan dated September 21, 1994,
               effective as of May 19, 1994 (filed as Exhibit 10.5 to the
               Registrant's Annual Report on Form 10-K for the year ended
               December 31, 1994 and incorporated herein by reference).

10.3 *  --     Noble Affiliates Thrift Restoration Plan dated May 9, 1994 (filed
               as Exhibit 10.6 to the Registrant's Annual Report on Form 10-K
               for the fiscal year ended December 31, 1994 and incorporated
               herein by reference).
</TABLE>


                                       61
<PAGE>   31
<TABLE>
<CAPTION>





Exhibit
Number                                  Exhibit **
- ------                                  ----------
<S>     <C>    <C>
10.4*   --     Noble Affiliates Restoration Trust dated September 21, 1994,
               effective as of October 1, 1994 (filed as Exhibit 10.7 to the
               Registrant's Annual Report on Form 10-K for the fiscal year ended
               December 31, 1994 and incorporated herein by reference).

10.5*   --     Noble Affiliates, Inc. 1992 Stock Option and Restricted Stock
               Plan, as amended and restated, dated November 2, 1992 (filed as
               Exhibit 4.1 to the Registrant's Registration Statement on Form
               S-8 (Registration No. 33-54084) and incorporated herein by
               reference).

10.6*   --     1982 Stock Option Plan of the Registrant (filed as Exhibit 4.1 to
               the Registrant's Registration Statement on Form S-8 (Registration
               No. 2-81590) and incorporated herein by reference).

10.7*   --     Amendment No. 1 to the 1982 Stock Option Plan of the Registrant
               (filed as Exhibit 4.2 to the Registrant's Registration Statement
               on Form S-8 (Registration No. 2-81590) and incorporated herein by
               reference).

10.8*   --     Amendment No. 2 to the 1982 Stock Option Plan of the Registrant
               (filed as Exhibit 10.11 to the Registrant's Annual Report on Form
               10-K for the year ended December 31, 1995 and incorporated herein
               by reference).

10.9*   --     1988 Nonqualified Stock Option Plan for Non-Employee Directors of
               the Registrant, as amended and restated, effective as of January
               30, 1996 (filed as Exhibit 10.13 to the Registrant's Annual
               Report on Form 10-K for the year ended December 31, 1996 and
               incorporated herein by reference).

10.10*  --     Form of Indemnity Agreement entered into between the Registrant
               and each of the Registrant's directors and bylaw officers (filed
               as Exhibit 10.18 to the Registrant's Annual Report of Form 10-K
               for the year ended December 31, 1995 and incorporated herein by
               reference).

10.11   --     Guaranty of the Registrant dated October 28, 1982, guaranteeing
               certain obligations of Samedan (filed as Exhibit 10.12 to the
               Registrant's Annual Report on Form 10-K for the year ended
               December 31, 1993 and incorporated herein by reference).

10.12   --     Stock Purchase Agreement dated as of July 1, 1996, between
               Samedan Oil Corporation and Enterprise Diversified Holdings
               Incorporated (filed as Exhibit 2.1 to the Registrant's Current
               Report on Form 8-K (Date of Event: July 31, 1996) dated August 13,
               1996 and incorporated herein by reference).

10.13*  --     Noble Affiliates, Inc. 1992 Stock Option and Restricted Stock
               Plan, as amended and restated on December 10, 1996, subject to
               the approval of stockholders (filed as Exhibit 10.21 to the
               Registrant's Annual Report on Form 10-K for the year ended
               December 31, 1996 and incorporated herein by reference).

10.14   --     Amended and Restated Credit Agreement dated as of December 24,
               1997 among the Registrant, as borrower, and Union Bank of
               Switzerland, Houston agency, as the agent for the lender, and
               NationsBank of Texas, N.A. and Texas Commerce Bank National
               Association, as managing agents, and Bank of Montreal, CIBC Inc.,
               The First National Bank of Chicago, Royal Bank of Canada, and
               Societe Generale, Southwest agency, as co-agents, and certain
               commercial lending institutions, as lenders (filed as Exhibit
               10.20 to the Registrant's Annual Report on Form 10-K for the
               fiscal year ended December 31, 1997 and incorporated herein by
               reference).
</TABLE>


                                       62
<PAGE>   32
<TABLE>
<CAPTION>



Exhibit
Number                                  Exhibit **
- ------                                  ----------
<S>     <C>    <C>

10.15   --     Noble Preferred Stock Remarketing and Registration Rights
               Agreement dated as of November 10, 1999 by and among the
               Registrant, Noble Share Trust, The Chase Manhattan Bank, and
               Donaldson, Lufkin & Jenrette Securities Corporation.

21      --     Subsidiaries

23      --     Consent of Arthur Andersen LLP.

23.1*** --     Consent of Arthur Andersen LLP.

27      --     Financial Data Schedule.

          *    Management contract or compensatory plan or arrangement required
               to be filed as an exhibit hereto.

          **   Copies of exhibits will be furnished upon prepayment of 25 cents
               per page. Requests should be addressed to the Vice
               President-Finance and Treasurer, Noble Affiliates, Inc., Post
               Office Box 1967, Ardmore, Oklahoma 73402.

          ***  Filed herewith
</TABLE>


                                       63

<PAGE>   1
                                                                    EXHIBIT 23.1


CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS


As independent public accountants, we hereby consent to the incorporation of our
report dated January 28, 2000, included on page 32 of the Company's 1999
Form10-K/A, into the previously filed registration statements on Form S-3 (File
Nos.333-18929 and 333-82953) and on Form S-8 (File Nos. 333-39299, 2-64600,
2-81590, 33-32692, 2-66654 and 33-54084).



                                                     ARTHUR ANDERSEN LLP


Oklahoma City, Oklahoma
March 27, 2000






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