WISER OIL CO
10-Q, 1999-08-13
CRUDE PETROLEUM & NATURAL GAS
Previous: WILSHIRE OIL CO OF TEXAS, NT 10-Q, 1999-08-13
Next: WITCO CORP, 10-Q, 1999-08-13



<PAGE>

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



                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D. C. 20549

                                   FORM 10-Q

                  QUARTERLY REPORT UNDER SECTION 13 OR 15(d)
                    OF THE SECURITIES EXCHANGE ACT OF 1934


         For Quarter ended June 30, 1999 Commission file number 0-5426

                             THE WISER OIL COMPANY
                            A DELAWARE CORPORATION

                 I.R.S. Employer Identification No. 55-0522128

                         8115 Preston Road, Suite 400
                              Dallas, Texas 75225
                           Telephone (214) 265-0080


Former name, former address and former fiscal year, if changed since last
report.   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, and (2) has been subject to such filing requirements
for the past 90 days.

             X
           -----              -----
            Yes                 No


Indicate the number of shares outstanding of each of the issuer's classes of
common stock, as of the close of the period covered by this report.

            Class                             Outstanding at June 30, 1999
       --------------                         ----------------------------
        $3 par value                                          8,951,965




================================================================================
<PAGE>


                             THE WISER OIL COMPANY

                                    PART I

                             FINANCIAL INFORMATION

Item 1.  Financial Statements

         The consolidated condensed financial statements included herein have
been prepared by the Company, without audit, pursuant to the rules and
regulations of the Securities and Exchange Commission. The financial statements
reflect all adjustments which are, in the opinion of management, necessary to
fairly present such information. Although the Company believes that the
disclosures are adequate to make the information presented not misleading,
certain information and footnote disclosures, including significant accounting
policies, normally included in financial statements prepared in accordance with
generally accepted accounting principles have been condensed or omitted pursuant
to such rules and regulations. It is suggested that these condensed financial
statements be read in conjunction with the financial statements and the notes
thereto included in the Company's latest annual report on Form 10-K.

                                       2
<PAGE>

                             THE WISER OIL COMPANY
                          CONSOLIDATED BALANCE SHEETS
                                  (Unaudited)
<TABLE>
<CAPTION>


                                                                 June 30,   December 31,
                                                                   1999         1998
                                                                  --------    --------
                                                                (000's) except share data
<S>                                                             <C>         <C>
Assets
Current Assets:
 Cash and cash equivalents ($992 restricted at June 30, 1999).  $  18,745      $   2,779
 Accounts receivable..........................................      8,890          9,102
 Inventories..................................................        316            669
 Income taxes receivable......................................      1,270          1,270
 Prepaid expenses.............................................      1,340          1,035
                                                                ------------------------
    Total current assets......................................     30,561         14,855
                                                                ------------------------

Property, Plant and Equipment, at cost:
 Oil and gas properties (successful efforts method)...........    274,067        367,974
 Other properties.............................................      3,736          5,523
                                                                ------------------------
                                                                  277,803        373,497
 Accumulated depreciation, depletion and amortization.........   (108,721)      (160,202)
                                                                ------------------------
 Net property, plant and equipment............................    169,082        213,295
Other Assets..................................................      3,631          3,660
                                                                ------------------------
                                                                $ 203,274      $ 231,810
                                                                ========================

Liabilities and Stockholders' Equity
Current Liabilities:
 Accounts payable.............................................  $   9,073      $  10,473
 Current portion of long-term debt............................          -         21,000
 Accrued liabilities..........................................      2,265          2,730
                                                                ------------------------
   Total current liabilities..................................     11,338         34,203
                                                                ------------------------
Long Term Debt................................................    124,989        124,452
Deferred Benefit Cost.........................................        361            378
Deferred Income Taxes.........................................          -            686
Stockholders' Equity:
 Common stock - $3 par value; 20,000,000 shares authorized;
  shares issued - 9,128,169; shares outstanding - 8,951,965...     27,385         27,385
 Paid-in capital..............................................      3,223          3,223
 Retained earnings............................................     37,677         43,090
 Foreign currency translation.................................      1,030          1,122
 Treasury stock; 176,204 shares, at cost......................     (2,729)        (2,729)
                                                                ------------------------
   Total stockholders' equity.................................     66,586         72,091
                                                                ------------------------
                                                                $ 203,274      $ 231,810
                                                                ========================

</TABLE>
     The notes to financial statements included in the Company's Annual Report
     on Form 10-K for the year ended December 31, 1998 are an integral part of
     these financial statements.

                                       3
<PAGE>

                             THE WISER OIL COMPANY
            CONSOLIDATED STATEMENTS OF INCOME AND RETAINED EARNINGS
                                  (Unaudited)
<TABLE>
<CAPTION>

                                                  For the Three Months            For the Six Months
                                                  --------------------            ------------------
                                                     Ended June 30,                 Ended June 30,
                                                    ---------------                 --------------
                                                   1999          1998               1999       1998
                                                  -------      -------             ------     ------
                                                            (000's except per share data)
<S>                                           <C>              <C>        <C>                  <C>
Revenues:
  Oil and gas sales.........................         $10,964    $15,471              $22,569   $ 32,545
  Dividends and interest....................             139         67                  165        212
  Other.....................................           2,875        481                3,115        677
                                                     --------------------------------------------------
                                                      13,978     16,019               25,849     33,434
                                                     --------------------------------------------------
Costs and Expenses:
  Production and operating..................           4,532      6,273                9,854     12,435
  Purchased natural gas.....................               -        350                  336        738
  Depreciation, depletion and amortization..           4,650      6,821               10,088     13,662
  Exploration...............................             481      3,654                1,375      7,007
  General and administrative................           1,772      2,553                3,291      4,979
  Interest expense..........................           3,598      3,227                7,004      6,373
                                                     --------------------------------------------------
                                                      15,033     22,878               31,948     45,194
                                                     --------------------------------------------------

Earnings (Loss) Before Income Taxes.........          (1,055)    (6,859)              (6,099)   (11,760)
Income Tax Expense (Benefit)................               -     (2,184)                (686)    (3,529)
                                                     --------------------------------------------------

NET INCOME (LOSS)...........................          (1,055)    (4,675)              (5,413)    (8,231)

Retained Earnings, beginning of period......          38,732     64,806               43,090     68,630
Dividends Paid..............................               -       (269)                   -       (537)
                                                     --------------------------------------------------
Retained Earnings, end of period............         $37,677    $59,862              $37,677   $ 59,862
                                                     ==================================================

Weighted Average Outstanding Shares.........           8,952      8,952                8,952      8,952
                                                     ==================================================
Earnings (Loss) Per Share:
  Basic.....................................          ($0.12)    ($0.52)              ($0.60)    ($0.92)
                                                     ==================================================

  Diluted...................................          ($0.12)    ($0.52)              ($0.60)    ($0.92)
                                                     ==================================================

Cash Dividends Per Share....................         $     -      $0.03              $     -   $   0.06
                                                     ==================================================

</TABLE>

     The notes to financial statements included in the Company's Annual Report
     on Form 10-K for the year ended December 31, 1998 are an integral part of
     these financial statements.

                                       4
<PAGE>

                             THE WISER OIL COMPANY

           CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY

                     For the Six Months Ended June 30, 1999

<TABLE>
<CAPTION>


                                                                            Foreign
                                            Common    Paid-in  Retained     Currency    Treasury
                                  Total      Stock    Capital  Earnings   Translation     Stock
                                  -----      -----    -------  ---------  ------------    ------
                                                                (000's)
<S>                             <C>        <C>        <C>      <C>        <C>           <C>
December 31, 1998.............   $72,091    $27,385    $3,223   $43,090        $1,122    $(2,729)

Net income (loss)                 (4,358)        --        --    (4,358)           --         --
  Other comprehensive income
     (loss), net of tax.......       (41)        --        --        --           (41)        --
                                 -------
Comprehensive income (loss)...               (4,399)

Dividends paid................        --         --        --        --            --         --
                                 -------   --------   -------  --------   -----------   --------

March 31, 1999................   $67,692    $27,385    $3,223   $38,732        $1,081    $(2,729)

  Net income (loss)               (1,055)        --        --    (1,055)           --         --
  Other comprehensive income
     (loss), net of tax.......       (51)        --        --        --           (51)        --
                                 -------
Comprehensive income (loss)...               (1,106)

Dividends paid................        --         --        --        --            --         --
                                 -------   --------   -------  --------   -----------   --------

June 30, 1999.................   $66,586    $27,385    $3,223   $37,677        $1,030    $(2,729)
                                 =======   ========   =======  ========   ===========   ========

</TABLE>



The notes to financial statements included in the Company's Annual Report on
Form 10-K for the year ended December 31, 1998 are an integral part of these
financial statements.

                                       5
<PAGE>

                             THE WISER OIL COMPANY
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                                  (Unaudited)
<TABLE>
<CAPTION>

                                                                    For the Six Months
                                                                   --------------------
                                                                      Ended June 30,
                                                                      --------------
                                                                     1999       1998
                                                                    ------     ------
                                                                      (000's)
<S>                                                                <C>        <C>
Cash Flows From Operating Activities:
   Net Income (Loss).............................................  $ (5,413)  $ (8,231)
   Adjustments to reconcile net income to operating cash flows:
     Depreciation, depletion and amortization....................    10,088     13,662
     Deferred income taxes.......................................      (686)    (1,176)
     Property sale gains.........................................    (2,922)      (391)
     Foreign currency translation................................       (92)        67
     Exploration expense.........................................     1,375      7,007
     Amortization of other assets................................       242        292
     Other Changes:
       Accounts receivable.......................................       212      2,458
       Inventories...............................................        58        (27)
       Income taxes receivable...................................         -     (2,331)
       Prepaid expenses..........................................      (305)      (890)
       Other assets..............................................      (176)       509
       Accounts payable..........................................    (1,400)    (7,010)
       Accrued liabilities.......................................      (465)       (31)
       Deferred benefits cost....................................       (17)        79
                                                                   -------------------
          Operating Cash Flows...................................       499      3,987
                                                                   -------------------

Cash Flows From Investing Activities:
   Capital and exploration expenditures..........................    (4,890)   (28,700)
   Proceeds from sales of property, plant and equipment..........    40,857      2,053
                                                                   -------------------
          Investing Cash Flows...................................    35,967    (26,636)
                                                                   -------------------

Cash Flows From Financing Activities:
   Long term debt issued.........................................         -     10,000
   Payments on long term debt....................................   (20,500)         -
   Dividends paid................................................         -       (537)
                                                                   -------------------
          Investing Cash Flows...................................   (20,500)     9,463
                                                                   -------------------

Net Increase (Decrease) In Cash..................................    15,966    (13,197)
Cash and Cash Equivalents, beginning of period...................     2,779     13,255
                                                                   -------------------
Cash and Cash Equivalents, end of period.........................  $ 18,745   $     58
                                                                   ===================
</TABLE>


The notes to financial statements included in the Company's Annual Report on
Form 10-K for the year ended December 31, 1998 are an integral part of these
financial statements.

                                       6
<PAGE>

                             THE WISER OIL COMPANY

Notes to Financial Statements

Note 1. Hedging Activities

  In the first half of 1999, the Company entered into forward sale agreements to
hedge a portion of the Company's oil and gas production as follows:
<TABLE>
<CAPTION>

Period                                      Daily Volume - Product     Price (Floor / Ceiling)
- ------                                     -----------------------     ----------------------
<S>                                       <C>                         <C>
     March 1, 1999 to July 31, 1999       23,832 MMBTU - Natural Gas  $1.72 per MMBTU
     May 1, 1999 to August 31, 1999       800 Bbls - Crude Oil        $13.40 per Bbl
     May 1, 1999 to August 31, 1999       455 Bbls - Crude Oil        $14.50 / 16.60 per Bbl (a)
     May 1, 1999 to September 30, 1999    500 Bbls - Crude Oil        $13.00 / 17.35 per Bbl (b)
     August 1999                          2,675 Bbls - Crude Oil      $16.50 / 20.00 per Bbl (a)
     September 1999                       3,900 Bbls - Crude Oil      $16.50 / 20.00 per Bbl (a)
     October 1999                         4,200 Bbls - Crude Oil      $16.50 / 20.00 per Bbl (a)
     November 1999                        4,300 Bbls - Crude Oil      $16.50 / 20.00 per Bbl (a)
     December 1999                        4,200 Bbls - Crude Oil      $16.50 / 20.00 per Bbl (a)

</TABLE>

    (a) These are "collar" hedges whereby the Company will receive the actual
    market price if the actual market price is between the floor price and the
    ceiling price. If the actual market price is below or above the floor or
    ceiling prices, the price received by the Company will be limited to the
    floor price or ceiling price, respectively.

    (b) The 500 Bbls per day crude oil hedge is also a "collar" hedge whereby
    the Company will receive the actual market price if the actual market price
    is between $15.00 per Bbl and the ceiling price of $17.35 per Bbl. If the
    actual market price is between the floor price of $13.00 per Bbl and $15.00
    per Bbl, the Company will receive $15.00 per Bbl. If the actual market price
    is less than the floor price of $13.00 per Bbl, the Company will receive the
    actual market price plus $2.00 per Bbl. If the actual market price is above
    the ceiling price of $17.35 per Bbl, the price received by the Company will
    be limited to $17.35 per Bbl.

  During the first half of 1999, oil and gas sales were reduced by $0.5 million
from the Company's hedging activities.

                                       7
<PAGE>

                             THE WISER OIL COMPANY

Notes to Financial Statements (continued)


Note 2. Summary of Guaranties of 9 1/2% Senior Subordinated Notes

     In May 1998, the Company issued $125 million aggregate principal amount of
its 9  1/2% Senior Subordinated Notes due 2007 pursuant to an offering exempt
from registration under the Securities Act of 1933.  The notes are unsecured
obligations of the Company, subordinated in right of payment to all existing and
any future senior indebtedness of the Company.  The notes rank pari passu with
any future senior subordinated indebtedness and senior to any future junior
subordinated indebtedness of the Company.  The notes are fully and
unconditionally guaranteed, jointly and severally, on an unsecured, senior
subordinated basis by certain wholly owned subsidiaries of the Company (the
"Subsidiary Guarantors").  At the time of the initial issuance of the notes,
Wiser Oil Delaware, Inc., The Wiser Marketing Company, Wiser Delaware LLC,
T.W.O.C., Inc. and The Wiser Oil Company of Canada were the Subsidiary
Guarantors (the "Initial Subsidiary Guarantors").  Except for two wholly owned
subsidiaries that are inconsequential to the Company on a consolidated basis,
the Initial Subsidiary Guarantors comprise all of the Company's direct and
indirect subsidiaries.

     Sections 13 and 15(d) of the Securities Exchange Act of 1934 require
presentation of the following unaudited summarized financial information of the
Subsidiary Guarantors.  The Company has not presented separate  financial
statements and other disclosures concerning each Subsidiary Guarantor because
such information is not material to investors.  There are no significant
contractual restrictions on distributions from each of the Subsidiary Guarantors
to the Company.

                                       8
<PAGE>

                             THE WISER OIL COMPANY

Notes to Financial Statements (continued)
<TABLE>
<CAPTION>

                                                    THE WISER OIL COMPANY
                                                    Subsidiary Guarantors
                                        ---------------------------------------------
                                                                 The Wiser
                                            Wiser     T.W.O.C.   Marketing  Combined
(000's)                                   Canada(1)     Inc.      Company     Total
                                         -----------  ---------  ---------  ---------
<S>                                      <C>          <C>        <C>        <C>
Revenues
- --------
For the quarter ended June 30,1999.....   $ 3,615          $ -      $  523   $ 4,138
For the quarter ended June 30, 1998....     3,778            -         540     4,318
For the six months ended June 30,1999..     6,773            -         523     7,296
For the six months ended June 30,1998..     7,558            1       1,100     8,659

Income (Loss) Before Income Taxes
- ---------------------------------
For the quarter ended June 30,1999.....   $   345          $ -      $   68   $   413
For the quarter ended June 30, 1998....      (777)          (4)         90      (691)
For the six months ended June 30,1999..      (165)           -          68       (97)
For the six months ended June 30,1998..    (1,486)          (8)        156    (1,338)

Net Income (Loss)
- ----------------
For the quarter ended June 30,1999.....   $   345          $ -      $   68   $   413
For the quarter ended June 30, 1998....      (522)          (3)         63      (462)
For the six months ended June 30,1999..      (165)           -          68       (97)
For the six months ended June 30,1998..    (1,040)          (6)        109      (937)

Current Assets
- --------------
June 30,1999...........................   $ 4,228          $ 3      $    -   $ 4,231
December 31, 1998......................     3,782            3         213     3,998

Total Assets
- ------------
June 30,1999...........................   $50,462          $ 3      $    -   $50,465
December 31, 1998......................    50,797            3         526    51,326

Current Liabilities
- -------------------
June 30,1999...........................   $ 4,755          $ -      $    -   $ 4,755
December 31, 1998......................     4,806            -         361     5,167

Noncurrent Liabilities
- ----------------------
June 30,1999...........................   $19,076          $ -      $    -   $19,076
December 31, 1998......................    17,846            -           -    17,846

Stockholder's Equity
- --------------------
June 30,1999...........................   $26,631          $ 3      $    -   $26,634
December 31, 1998......................    28,145            3         165    28,313
</TABLE>

(1)  Includes the accounts of Wiser Oil Delaware, Inc., Wiser Delaware LLC and
The Wiser Oil Company of Canada.

See other notes to financial statements included in the Company's Annual Report
on Form 10-K for the year ended December 31, 1998.

                                       9
<PAGE>

                             THE WISER OIL COMPANY

Item 2.  Management's Discussion and Analysis of Financial Condition and Results
         of Operations

         Comparison of Quarters Ended June 30, 1999 and June 30, 1998

     In April and May of 1999, the Company sold certain oil and gas properties
for $40.9 million which represented approximately 19% of the Company's total
proved oil and gas reserves at December 31, 1998. The Company recognized a gain
of $2.9 million from the property sales in the second quarter of 1999.

     Revenues for the second quarter of 1999 decreased $2.0 million or 13% from
the second quarter of 1998, due primarily to lower oil and gas sales. Oil sales
for the second quarter of 1999 were $0.8 million lower than the second quarter
of 1998 as net oil production for the second quarter of 1999 was 432,000
barrels, down 27% from 592,000 barrels in the second quarter of 1998. The
decrease in oil production in the second quarter of 1999 was attributable to
declining production at Maljamar and the Evi and Provost fields in Canada
combined with the oil and gas property sales discussed above. The average price
received for oil sales in the second quarter of 1999 was $15.11 per barrel, up
$2.78 per barrel or 23% from the second quarter of 1998. Gas sales for the
second quarter of 1999 were $3.7 million lower than the second quarter of 1998
as net gas production for the second quarter of 1999 was 2,509 MMCF, down 1,259
MMCF or 33% from the second quarter of 1998. The decrease in gas production was
due primarily to the sale of oil and gas properties discussed above. The average
price received for gas sales in the second quarter of 1999 was $1.48 per Mcf, a
decrease of $0.48 per Mcf or 24% from the second quarter of 1998. During the
second quarter of 1999, oil and gas sales were reduced by $0.6 million from the
Company's hedging activities. There were no adjustments to oil and gas sales for
hedging activities in the second quarter of 1998.

     Production and operating expense for the second quarter of 1999 decreased
$1.7 million or 28% as a result of the oil and gas property sales discussed
above and cost cutting measures implemented at the Maljamar and Wellman fields.
On a BOE basis (excluding 140 MMCF of gas purchased for resale during the second
quarter of 1998), production and operating expense during the second quarter of
1999 increased to $4.96 per BOE or 1% from $4.89 per BOE during the second
quarter of 1998.   Depreciation, depletion and amortization, ("DD&A") for the
second quarter of 1999, decreased $2.2 million or 32% from the second quarter of
1998 due primarily to the oil and gas property sales discussed above.
Exploration expense for the second quarter of 1999 was $0.5 million, down $3.2
million from the second quarter of 1998 due to substantially reduced exploration
activities in the second quarter of 1999. General and administrative expense in
the second quarter of 1999 was $1.8 million, down $0.8 million from the second
quarter of 1998 due to substantial reductions in office staff that were made in
December 1998. Interest expense during the second quarter of 1999 was $3.6
million, up $0.4 million or 11% from the second quarter of 1998 due to fees
associated with refinancing the Credit Agreement with NationsBank of Texas, N.A.
("Credit Agreement") with the Restated Credit Agreement with Bank One, Texas,
N.A.

                                       10
<PAGE>

                             THE WISER OIL COMPANY

Item 2.  Management's Discussion and Analysis of Financial Condition and Results
         of Operations

    Comparison of Quarters Ended June 30, 1999 and June 30, 1998 (continued)

     No income tax benefit was recognized during the second quarter of 1999
compared to a tax benefit rate of 32% in the second quarter of 1998. The net
loss before income taxes of $1.1 million in the second quarter of 1999 will
generate income tax benefits only if the net loss can be carried forward and
applied against future taxable income. Since full realization of the future
income tax benefits associated with the net loss can not be reasonably assured
at this time, no income tax benefits were recognized in the second quarter of
1999.

     The Company realized a net loss of $1.1 million and net loss per share of
$0.12 in the second quarter of 1999 compared to a net loss of $4.7 million and
net loss per share of $0.52 during the second quarter of 1998.

        Comparison of Six Months Ended June 30, 1999 and June 30, 1998

     Revenues for the first half of 1999 decreased $7.6 million or 23% from the
first half of 1998, due primarily to lower oil and gas sales. Oil sales for the
first half of 1999 were $4.9 million lower than the first half of 1998 as net
oil production for the first half of 1999 was 931,000 barrels, down 27% from
1,275,000 barrels in the first half of 1998. The decrease in oil production in
the first half of 1999 was attributable to declining production at Maljamar and
the Evi and Provost fields in Canada combined with the oil and gas property
sales discussed above. The average price received for oil sales in the first
half of 1999 was $12.88 per barrel, down $0.39 per barrel or 3% from the first
half of 1998. Gas sales for the first half of 1999 were $4.8 million lower than
the first half of 1998 as net gas production for the first half of 1999 was
5,813 MMCF, down 1,385 MMCF or 19% from the first half of 1998. The decrease in
gas production was due primarily to the sale of oil and gas properties discussed
above. The average price received for gas sales during the first half of 1999
was $1.59 per Mcf, a decrease of $0.37 per Mcf or 19% from the first half of
1998. During the first half of 1999, oil and gas sales were reduced by $0.5
million from the Company's hedging activities. There were no adjustments to oil
and gas sales for hedging activities in the first half of 1998.

     Production and operating expense for the first half of 1999 decreased $2.6
million or 21% from the first half of 1998 primarily as a result of the oil and
gas property sales discussed above and cost cutting measures implemented at the
Maljamar and Wellman fields. On a BOE basis (excluding 148 MMCF and 305 MMCF of
gas purchased for resale during the first half of 1999 and 1998, respectively),
production and operating expense during the first half of 1999 increased to
$4.90 per BOE or 2% from $4.81 per BOE during the first half of 1998. DD&A for
the first half of 1999, decreased $3.6 million or 26% from the first half of
1998 due primarily to the oil and gas property sales discussed above.
Exploration expense for the first half of 1999 was $1.4 million, down $5.6
million from the first half of 1998 due primarily to substantially reduced
exploration activities in the second quarter of 1999.

                                       11
<PAGE>

                             THE WISER OIL COMPANY

Item 2.  Management's Discussion and Analysis of Financial Condition and Results
         of Operations

  Comparison of Six Months Ended June 30, 1999 and June 30, 1998 (continued)

General and administrative expense in the first half of 1999 was $3.3 million,
down $1.7 million from the first half of 1998 due to substantial reductions in
office staff that were made in December 1998. Interest expense during the first
half of 1999 was $7.0 million, up $0.6 million or 10% from the first half of
1998 due to the issuance of $125 million of Senior Subordinated Notes in May
1998 and fees associated with refinancing the Credit Agreement with the Restated
Credit Agreement in the second quarter of 1999. The effective income tax rate
during the first half of 1999 was 11% compared to 30% in the first half of 1998.
The net loss before income taxes of $6.1 million in the first quarter of 1999
will generate income tax benefits only if the net loss can be carried forward
and applied against future taxable income. Since full realization of the future
income tax benefits associated with the net loss can not be reasonably assured
at this time, income tax benefits were recorded in the first half of 1999 only
to the extent of the Company's existing deferred income tax liability of $0.7
million.

     The Company realized a net loss of $5.4 million and net loss per share of
$0.60 in the first half of 1999 compared to net loss of $8.2 million and net
loss per share of $0.92 during the first half of 1998.

  Operating cash flows during the first half of 1999 were $0.5 million, down
$3.5 million from the first half of 1998 primarily as a result of decreased oil
and gas sales which were offset in part by lower production and operating
expense and lower general and administrative expense. Capital and exploration
expenditures during the first half of 1999 were $4.9 million, down $23.8 million
from the first half of 1998. The Company has reduced its capital and exploration
budget for 1999 to a range of $8 million to $10 million. The Company received
$40.9 million in net sales proceeds from the sale of oil and gas properties
during the first half of 1999 compared to $2.1 million in proceeds received
during the first half of 1998.

     In April 1999, the Company used $10 million of sale proceeds to reduce the
outstanding balance under the Credit Agreement to $11 million. On May 10, 1999,
the Company entered into a Restated Credit Agreement ("BankOne Revolver") with
Bank One, Texas, N.A. The Company borrowed $11 million under the BankOne
Revolver and repaid in full the outstanding principal balance of $11 million
under the Credit Agreement and the Credit Agreement was terminated. Also in May
1999, the Company used $10.5 million of sales proceeds to reduce the BankOne
Revolver balance to $0.5 million.

                                       12
<PAGE>

                             THE WISER OIL COMPANY

Item 2.  Management's Discussion and Analysis of Financial Condition and Results
         of Operations

     The BankOne Revolver provides the Company with up to a $25 million line of
credit through April 30, 2001. The amounts available for borrowing are based on
the Company's oil and gas reserves and the Company's Borrowing Base at June 30,
1999 was $8 million. Available loan and interest options are (i) Prime Rate
Loans, at the bank's prime interest rate and (ii) Eurodollar Loans, at LIBOR
plus 2.5%, 2.75% or 3% depending on the percentage of the Borrowing Base
actually borrowed by the Company. The commitment fee on the unused Borrowing
Base is 0.5%. The BankOne Revolver imposes certain restrictions on sales of
assets, payment of dividends and incurrence of indebtedness and requires the
Company to, among other things, maintain certain financial ratios and make
monthly escrow deposits of $1.0 million to fund the semi-annual interest
payments on the 9 1/2% Senior Subordinated Notes.

Quantitative and Qualitative Disclosures About Market Risk

     See Note 1 "Hedging Activities."

Year 2000 Issue

     The Company has assessed and continues to assess the impact of the "year
2000" ("Y2K") issue on its reporting systems and operations. The Y2K issue
exists because many computer systems and applications currently use two-digit
date fields to designate a year. As the century date occurs, two-digit date
systems will recognize the year 2000 as 1900 or not at all. This inability to
recognize or properly treat the year 2000 may cause systems to process critical
financial and operational information incorrectly.

     In 1998 and the first quarter of 1999, the Company's U.S. and Canadian
computerized accounting systems were upgraded to versions which are Y2K
compliant. These upgrades were completed at a nominal cost to the Company. In
addition, the Company's personal computer systems were analyzed for Y2K
compliance during 1998 and certain components were upgraded at a nominal cost to
the Company. Virtually all of the Company's personal computer systems are
currently Y2K compliant. Wiser is currently reviewing computer-controlled oil
field equipment for Y2K compliance and expects the suppliers of such equipment
to provide upgrades or modifications, if necessary, before the end of 1999 at a
nominal cost to the Company. Wiser is also in the process of surveying its
primary business partners to seek assurances that they will be Y2K compliant
during 1999. Despite these efforts to seek assurances, the Company cannot
provide assurance that all significant business partners will achieve Y2K
compliance in a timely manner. If there is a high risk that a business partner
will not be Y2K compliant in a timely manner, a contingency plan will be
developed or an alternate business partner will be used to minimize the Y2K
risk.

                                       13
<PAGE>

                             THE WISER OIL COMPANY

                          PART II - OTHER INFORMATION


ITEM 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

     (a)  The annual meeting of stockholders of The Wiser Oil Company was held
          in Dallas, Texas, at 4:00 p.m., local time, on May 17, 1999.

     (b)  Proxies were solicited by the Board of Directors of The Wiser Oil
          Company pursuant to Regulation 14A under the Securities Exchange Act
          of 1934.  There was no solicitation in opposition to the Board of
          Directors' nominees as listed in the proxy statement and all of such
          nominees were duly elected.

     (c)  Out of a total of 8,951,965 shares of The Wiser Oil Company common
          stock outstanding and entitled to vote as of the March 16, 1999 record
          date, 7,881,584 shares were present in person or by proxy,
          representing approximately 88 percent of outstanding shares.  The only
          matter voted on by the stockholders, as fully described in the proxy
          statement for the annual meeting, was the election of John W. Cushing,
          III, Lorne H. Larson and Andrew J. Shoup, Jr. to serve three-year
          terms on the Board of Directors of The Wiser Oil Company. The results
          of voting were as follows:


       Nominee              Number of Shares           Number of Shares
   for Re-election         Voting FOR Election       WITHHOLDING AUTHORITY
     as Director                as Director     to Vote for Election as Director
- ---------------------      -------------------  --------------------------------

John W. Cushing, III             7,599,660                  281,924
Lorne H. Larson                  7,553,297                  328,287
Andrew J. Shoup, Jr.             7,523,054                  358,530


 The following individuals continued their respective terms of service
 as Directors of The Wiser Oil Company following the meeting:

                              Howard G. Hamilton
                              G. Frayer Kimball, III
                              Jon L. Mosle, Jr.
                              Paul I. Neuenschwander
                              A. W. Schenck, III

                                       14
<PAGE>

Item 6.   Exhibits and Reports on Form 8-K

     (a)  Exhibits
          --------
          The information required by this Item 6 (a) is set forth in the Index
          to Exhibits accompanying this quarterly report and is incorporated
          herein by reference.


     (b)  Reports on Form 8-K
          -------------------
          None.


                                       15
<PAGE>

                                  SIGNATURES
                                  ----------

Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.



                                         THE WISER OIL COMPANY
                                      -------------------------------------
                                            (Registrant)



Date:  August 13, 1999                   /s/ Andrew J. Shoup, Jr.
                                      -------------------------------------
                                         Andrew J. Shoup, Jr.
                                         President and
                                         Chief Executive Officer



Date:  August 13, 1999                   /s/ Lawrence J. Finn
                                      -------------------------------------
                                         Lawrence J. Finn
                                         Vice President, Finance and
                                         Chief Financial Officer

                                       16
<PAGE>

                             THE WISER OIL COMPANY

                               Index to Exhibits

Exhibit
Number    Exhibit
- ------    -------

4.15*     Restated Credit Agreement Dated May 10, 1999 among The Wiser Oil
          Company, as borrower, and Bank One, Texas, N.A., as agent, and the
          Institutions as listed on the signature pages thereto, as Banks.

27*       Financial Data Schedule


* Filed herewith.

                                       17

<PAGE>

                                                                  Exhibit 4.15



                           RESTATED CREDIT AGREEMENT

                                     AMONG

                             THE WISER OIL COMPANY
                                  AS BORROWER

                                      AND

                             BANK ONE, TEXAS, N.A.
                       AND THE INSTITUTIONS NAMED HEREIN
                                   AS BANKS

                                      AND

                            BANK ONE, TEXAS, N.A.,
                                   AS AGENT



                                 MAY 10, 1999
<PAGE>

                               TABLE OF CONTENTS

                                                                      Page No.

1.   Definitions.......................................................   1

2.   Commitments of the Bank...........................................  11
     (a)  Terms of Revolving Commitment................................  11
     (b)  Procedure for Borrowing......................................  11
     (c)  Letters of Credit............................................  12
     (d)  Procedure for Obtaining Letters of Credit....................  13
     (e)  Voluntary Reduction of Revolving Commitment..................  13
     (f)  Monthly Commitment Reductions................................  13
     (g)  Several Obligations..........................................  14

3.   Notes Evidencing Loan.............................................  14
     (a)  Form of Revolving Notes......................................  14
     (b)  Issuance of Additional Notes.................................  14
     (c)  Interest Rate................................................  14
     (d)  Payment of Interest..........................................  15
     (e)  Payment of Principal.........................................  15
     (f)  Payment to Banks.............................................  15
     (g)  Sharing of Payments, Etc.....................................  15
     (h)  Non-Receipt of Funds by the Agent............................  15

4.   Interest Rates....................................................  16
     (a)  Options......................................................  16
     (b)  Interest Rate Determination..................................  17
     (c)  Conversion Option............................................  17
     (d)  Recoupment...................................................  17

5.   Change of Circumstances...........................................  17
     (a)  Unavailability of Funds or Inadequacy of Pricing.............  17
     (b)  Change in Laws...............................................  18
     (c)  Increased Cost or Reduced Return.............................  18
     (d)  Discretion of Bank as to Manner of Funding...................  20
     (e)  Breakage Fees................................................  20

6.   Collateral Security...............................................  21

7.   Borrowing Base....................................................  21

                                      -i-
<PAGE>

     (a)  Initial Borrowing Base.......................................  21
     (b)  Subsequent Determinations of Borrowing Base..................  22

8.   Fees..............................................................  23
     (a)  Unused Commitment Fee........................................  23
     (b)  The Letter of Credit Fee.....................................  24
     (c)  Agency Fees..................................................  24
     (d)  Origination Fee..............................................  24

9.   Prepayments.......................................................  24
     (a)  Voluntary Prepayments........................................  24
     (b)  Mandatory Prepayment For Borrowing Base Deficiency...........  24

10.  Representations and Warranties....................................  24
     (a)  Creation and Existence.......................................  24
     (b)  Power and Authority..........................................  25
     (c)  Binding Obligations..........................................  25
     (d)  No Legal Bar or Resultant Lien...............................  25
     (e)  No Consent...................................................  25
     (f)  Financial Condition..........................................  25
     (g)  Liabilities..................................................  26
     (h)  Litigation...................................................  26
     (i)  Taxes; Governmental Charges..................................  26
     (j)  Titles, Etc..................................................  26
     (k)  Defaults.....................................................  26
     (l)  Casualties; Taking of Properties.............................  26
     (m)  Use of Proceeds; Margin Stock................................  27
     (n)  Location of Business and Offices.............................  27
     (o)  Compliance with the Law......................................  27
     (p)  No Material Misstatements....................................  27
     (q)  Not A Utility................................................  28
     (r)  ERISA........................................................  28
     (s)  Public Utility Holding Company Act...........................  28
     (t)  Subsidiaries.................................................  28
     (u)  Environmental Matters........................................  28
     (v)  Liens........................................................  28
     (w)  Year 2000 Compliance.........................................  28

11.  Conditions of Lending.............................................  30

12.  Affirmative Covenants.............................................  32

                                      -ii-
<PAGE>

     (a)  Financial Statements and Reports.............................  32
     (b)  Certificates of Compliance...................................  33
     (c)  Accountants' Certificate.....................................  33
     (d)  Taxes and Other Liens........................................  34
     (e)  Compliance with Laws.........................................  34
     (f)  Further Assurances...........................................  34
     (g)  Performance of Obligations...................................  34
     (h)  Insurance....................................................  34
     (i)  Accounts and Records.........................................  35
     (j)  Right of Inspection..........................................  35
     (k)  Notice of Certain Events.....................................  36
     (l)  ERISA Information and Compliance.............................  36
     (m)  Environmental Reports and Notices............................  36
     (n)  Compliance and Maintenance...................................  37
     (o)  Operation of Properties......................................  37
     (p)  Compliance with Leases and Other Instruments.................  37
     (q)  Certain Additional Assurances Regarding
          Maintenance and Operations of Properties.....................  38
     (r)  Sale of Certain Assets/Prepayment of Proceeds................  38
     (s)  Title Matters................................................  38
     (t)  Curative Matters.............................................  38
     (u)  Change of Principal Place of Business........................  39
     (v)  Cash Collateral Accounts.....................................  39
     (w)  Year 2000 Compatibility......................................  39
     (x)  Subsidiary Guaranties........................................  40
     (y)  Collateral...................................................  40
     (z)  Escrow of Interest Payments..................................  40
     (aa) Collateral Shares............................................  41

13.  Negative Covenants................................................  41
     (a)  Negative Pledge..............................................  41
     (b)  Consolidated Current Ratio...................................  41
     (c)  Minimum Consolidated Interest Coverage Ratio.................  41
     (d)  Ratio of Consolidated Funded Debt to
          Consolidated Total Capital...................................  42
     (e)  Capital Expenditure..........................................  42
     (g)  Debts, Guaranties and Other Obligations......................  42
     (h)  Dividends or Distributions...................................  43
     (i)  Loans and Advances...........................................  43
     (j)  Sale or Discount of Receivables..............................  43
     (k)  Nature of Business...........................................  43
     (l)  Transactions with Affiliates.................................  43

                                     -iii-
<PAGE>

     (m)  Hedging Transactions.........................................  44
     (n)  Investments..................................................  44
     (o)  Amendment to Articles of Incorporation or Bylaws.............  44
     (p)  Purchase or Prepayment of Other Indebtedness.................  44
     (q)  Proceeds of Production.......................................  45
     (r)  Issuance of Preferred Stock..................................  45
     (s)  Amendments, Etc. of Indenture................................  45

14.  Events of Default.................................................  45

15.  The Agent and the Banks...........................................  47
     (a)  Appointment and Authorization................................  47
     (b)  Note Holders.................................................  48
     (c)  Consultation with Counsel....................................  48
     (d)  Documents....................................................  48
     (e)  Resignation or Removal of Agent..............................  48
     (f)  Responsibility of Agent......................................  49
     (g)  Independent Investigation....................................  50
     (h)  Indemnification..............................................  51
     (i)  Benefit of Section 15........................................  51
     (j)  Pro Rata Treatment...........................................  51
     (k)  Assumption as to Payments....................................  51
     (l)  Other Financings.............................................  52
     (m)  Interests of Banks...........................................  52
     (n)  Investments..................................................  52

16.  Exercise of Rights................................................  53

17.  Notices...........................................................  53

18.  Expenses..........................................................  53

19.  Indemnity.........................................................  54

20.  Governing Law.....................................................  55

21.  Invalid Provisions................................................  55

22.  Maximum Interest Rate.............................................  55

23.  Amendments........................................................  55

                                      -iv-
<PAGE>

24.  Multiple Counterparts.............................................  55

25.  Conflict..........................................................  56

26.  Survival..........................................................  56

27.  Parties Bound.....................................................  56

28.  Assignments and Participations....................................  56

29.  Choice of Forum: Consent to Service of Process and Jurisdiction...  58

30.  Waiver of Jury Trial..............................................  58

31.  Other Agreements..................................................  58

32.  Financial Terms...................................................  58

                                      -v-
<PAGE>

Exhibits
- --------

Exhibit "A"   -    Notice of Borrowing
Exhibit "B"   -    Revolving Note
Exhibit "C"   -    Unlimited Guaranty
Exhibit "D"   -    Certificate of Compliance
Exhibit "E"   -    Form of Assignment and Acceptance Agreement

Schedules
- ---------

Schedule 1    -    Liens
Schedule 2    -    Financial Condition
Schedule 3    -    Liabilities
Schedule 4    -    Litigation
Schedule 5    -    Subsidiaries
Schedule 6    -    Environmental Matters
Schedule 7    -    Title Matters
Schedule 8    -    Curative Matters

                                      -vi-
<PAGE>

                           RESTATED CREDIT AGREEMENT

     THIS RESTATED CREDIT AGREEMENT (hereinafter referred to as the "Agreement")
executed as of the 10th day of May, 1999, by and between THE WISER OIL COMPANY,
a Delaware corporation ("Borrower") and BANK ONE, TEXAS, N.A. ("Bank One") and
each of the financial institutions which is a party hereto (as evidenced by the
signature pages to this Agreement) or which may from time to time become a party
hereto pursuant to the provisions of Section 28 hereof or any successor or
assignee thereof (hereinafter collectively referred to as "Banks", and
individually, "Bank") and Bank One, as Agent (the "Agent").

                             W I T N E S S E T H:

     WHEREAS, Borrower, NationsBank of Texas, N.A., as Agent, and certain other
banks entered into a Credit Agreement dated as of December 23, 1997 (the "Credit
Agreement");

     WHEREAS, the Credit Agreement and all rights and obligations thereunder
were assigned by NationsBank of Texas, N.A. and the other financial institutions
participating therein to Arnos Corp. on March 23, 1999; and

     WHEREAS, the Credit Agreement and all rights and obligations thereunder
were assigned by the Arnos Corp. to the Agent and the Banks as of even date
herewith; and

     WHEREAS, the Borrower, the Agent and the Banks have agreed to restate the
Credit Agreement in its entirety; and

     NOW, THEREFORE, in consideration of the mutual covenants and agreements
herein contained, the parties hereby agree as follows:

      1.  Definitions.  When used herein the terms "Agent", "Agreement ",
"Bank", "Banks", "Bank One" and "Borrower" shall have the meanings indicated
above.  When used herein the following terms shall have the following meanings:

          Advance or Advances - shall mean a loan or loans hereunder.
          -------------------

          Affiliate shall mean any Person which, directly or indirectly,
          ---------
     controls, is controlled by or is under common control with the relevant
     Person.  For the purposes of this definition, "control" (including, with
     correlative meanings, the terms "controlled by" and "under common control
     with"), as used with respect to any Person, shall mean a member of the
     board of directors, a partner or an officer of such Person, or any other
     Person with possession, directly or indirectly, of the power to direct or
     cause the direction of the management and policies of such Person, through
     the ownership (of record, as trustee, or by proxy) of voting shares,
     partnership interests or voting rights, through a management contract or
     otherwise.  Any Person owning or controlling directly or indirectly ten
     percent or more of the voting shares, partnership interests or voting
     rights, or other equity interest of another Person shall be deemed to be an
     Affiliate of such Person.
<PAGE>

          Appalachia Sale shall mean the sale of certain oil and gas properties
          ---------------
     pursuant to that certain Agreement of Sale and Purchase between Borrower
     and Columbia Natural Resources, Inc. dated April 12, 1999.

          Assignment and Acceptance shall mean a document substantially in the
          -------------------------
     form of Exhibit  "E" hereto.

          Borrowing Base shall mean the value assigned by the Banks from time to
          --------------
     time to the Oil and Gas Properties pursuant to Section 7 hereof.

          Borrowing Base Usage shall mean as of any date, all amounts
          --------------------
     outstanding on the Revolving Loan plus all outstanding Letters of Credit,
     divided by the Borrowing Base.

          Borrowing Date shall mean the date elected by Borrower pursuant to
          --------------
     Section 2(b) hereof for an Advance on the Revolving Loan.

          Change of Control shall occur if any Person (or syndicate or group of
          -----------------
     Persons which is deemed a Person for the purposes of Sections 13(d) or
     14(d)(ii) of the Securities Act of 1934, as amended) shall acquire,
     directly or indirectly an amount of issued and outstanding voting stock of
     Borrower (including the acquisition of newly-issued stock) sufficient to
     change the control of Borrower by causing the election or change of a
     majority of the directors of Borrower.

          Change of Management shall occur if Andrew J. Shoup, Jr. ever ceases
          --------------------
     to act as President and Chief Executive Officer of Borrower and a
     replacement for such officer, acceptable to Agent, is not appointed within
     thirty (30) days thereafter.

          Commitment shall mean the Revolving Commitment.
          ----------

          Consolidated Current Assets shall mean the total of the Borrower's
          ---------------------------
     consolidated current assets determined in accordance with GAAP plus, as of
     any date the current unused availability on the Revolving Commitment.

          Consolidated Current Liabilities shall mean the total of Borrower's
          --------------------------------
     consolidated current obligations as determined in accordance with GAAP,
     excluding therefrom current maturities due on the Loan.

          Consolidated EBITDA shall mean Consolidated Net Income plus the sum of
          -------------------
     (i) income tax expense (but excluding income tax expense relating to the
     sales or other disposition of assets, including capital stock, the gains
     and losses from which are excluded in the determination of Consolidated Net
     Income), (ii) Consolidated Interest Expense, (iii) depreciation, depletion
     and amortization expense, (iv) exploration expenses, and (v) all other non-
     cash charges.

                                      -2-
<PAGE>

          Consolidated Funded Debt shall mean the consolidated debt of Borrower
          ------------------------
     and its Consolidated Subsidiaries for borrowed money.

          Consolidated Interest Expense shall mean the aggregate amount of cash
          -----------------------------
     and non-cash interest expense (including capitalized interest) of Borrower
     and its Subsidiaries as determined on a consolidated basis in accordance
     with GAAP in respect of all indebtedness.

          Consolidated Net Income shall mean Borrower's consolidated net income
          -----------------------
     after income taxes calculated in accordance with GAAP.

          Consolidated Total Capital shall mean the sum of (i) Consolidated
          --------------------------
     Funded Debt, plus (ii) consolidated shareholder's equity, in each case,
     such amounts would be reflected on a consolidated balance sheet of Borrower
     prepared in accordance with GAAP.

          Consolidated Subsidiaries shall mean, for any Person, any Subsidiary,
          -------------------------
     or other entity the accounts of which would be consolidated with those of
     such Person in its consolidated financial statements.

          Default shall mean all of the events specified in Section 14 hereof,
          -------
     regardless of whether there shall have occurred any passage of time or
     giving of notice, or both, that would be necessary in order to constitute
     such event as an Event of Default.

          Defaulting Bank - is used herein as defined in Section 3(f) hereof.
          ---------------

          Effective Date shall mean the date of this Agreement.
          --------------

          Eligible Assignee shall mean any of (i) a Bank or any Affiliate of a
          -----------------
     Bank; (ii) a commercial bank organized under the laws of the United States,
     or any state thereof, and having a combined capital and surplus of at least
     $100,000,000; (iii) a commercial bank organized under the laws of any other
     country which is a member of the Organization for Economic Cooperation and
     Development, or a political subdivision of any such country, and having a
     combined capital and surplus of at least $100,000,000.00, provided that
     such bank is acting through a branch or agency located in the United
     States; (iv) a Person that is primarily engaged in the business of
     commercial lending and that (A) is a subsidiary of a Bank, (B) a subsidiary
     of a Person of which a Bank is a subsidiary, or (C) a Person of which a
     Bank is a subsidiary; (v) any other entity (other than a natural person)
     which is an "accredited investor" (as defined in Regulation D under the
     Securities Act) which extends credit or buys loans as one of its
     businesses, including, but not limited to, insurance companies, mutual
     funds, investments funds and lease financing companies; and (vi) with
     respect to any Bank that is a fund that invests in loans, any other fund
     that invests in loans and is managed by the same investment advisor of such
     Bank or by an Affiliate of such investment advisor (and treating all such
     funds so managed as a single Eligible Assignee); provided, however, that no
     Affiliate of Borrower shall be an Eligible Assignee.

                                      -3-
<PAGE>

          Environmental Laws shall mean the Comprehensive Environmental
          ------------------
     Response, Compensation, and Liability Act of 1980, as amended by the
     Superfund Amendments and Reauthorization Act of 1986, 42 U.S.C.A. (S)9601,
     et seq., the Resource Conservation and Recovery Act, as amended by the
     -- ---
     Hazardous Solid Waste Amendment of 1984, 42 U.S.C.A. (S)6901, et seq., the
                                                                   -- ---
     Clean Water Act, 33 U.S.C.A. (S)1251 et seq., the Clean Air Act, 42
                                          -- ---
     U.S.C.A. (S)1251, et seq., the Toxic Substances Control Act, 15 U.S.C.A.
                       -- ---
     (S)2601, et seq., The Oil Pollution Act of 1990, 33 U.S.G. (S)2701, et
              -- ---                                                     --
     seq., and all other laws, statutes, codes, acts, ordinances, orders,
     ---
     judgments, decrees, injunctions, rules, regulations, orders, permits,  and
     restrictions of any federal, state, county, municipal and other
     governments, departments, commissions, boards, agencies, courts,
     authorities, officials and officers, domestic or foreign, relating to oil
     pollution, air pollution, water pollution, noise control and/or the
     handling, discharge, disposal or recovery of on-site or off-site asbestos,
     radioactive materials, spilled or leaked petroleum products, distillates or
     fractions and industrial solid waste or "hazardous substances" as defined
     by 42 U.S.C. (S) 9601, et seq., as amended, as each of the foregoing may be
                            -- ---
     amended from time to time.

          Environmental Liability shall mean any claim, demand, obligation,
          -----------------------
     cause of action, order, violation, damage, injury, judgment, penalty or
     fine, cost of enforcement, cost of remedial action or any other costs or
     expense whatsoever, including reasonable attorneys' fees and disbursements,
     resulting from the violation or alleged violation of any Environmental Law
     or the release of any substance into the environment which is required to
     be remediated by a regulatory agency or governmental authority or the
     imposition of any Environmental Lien (as hereinafter defined), which could
     reasonably be expected to individually or in the aggregate have a Material
     Adverse Effect.

          Environmental Lien shall mean a Lien in favor of any court,
          ------------------
     governmental agency or instrumentality or any other Person (i) for any
     Environmental Liability or (ii) for damages arising from or cost incurred
     by such court or governmental agency or instrumentality or other person in
     response to a release or threatened release of asbestos or "hazardous
     substance" into the environment, the imposition of which Lien could
     reasonably be expected to have a Material Adverse Effect.

          ERISA shall mean the Employee Retirement Income Security Act of 1974,
          -----
     as amended.

          Eurodollar Business Day shall mean a Business Day on which dealings in
          -----------------------
     U.S. Dollar deposits are carried on in the London interbank market.

          Eurodollar Interest Period shall mean with respect to any Eurodollar
          --------------------------
     Loan (i) initially, the period commencing on the date such Eurodollar Loan
     is made and ending one (1), two (2), three (3) or six (6) months thereafter
     as selected by the Borrower pursuant to Section 4(a)(ii), and (ii)
     thereafter, each period commencing on the day following the last day of the
     next preceding Interest Period applicable to such Eurodollar Loan and
     ending one (1), two

                                      -4-
<PAGE>

     (2) or three (3) months thereafter, as selected by the Borrower pursuant to
     Section 4(a)(ii); provided, however, that (i) if any Eurodollar Interest
     Period would otherwise expire on a day which is not a Eurodollar Business
     Day, such Interest Period shall expire on the next succeeding Eurodollar
     Business Day unless the result of such extension would be to extend such
     Interest Period into the next calendar month, in which case such Interest
     Period shall end on the immediately preceding Eurodollar Business Day, (ii)
     if any Eurodollar Interest Period begins on the last Eurodollar Business
     Day of a calendar month (or on a day for which there is no numerically
     corresponding day in the calendar month at the end of such Interest Period)
     such Interest Period shall end on the last Eurodollar Business Day of a
     calendar month, and (iii) any Eurodollar Interest Period which would
     otherwise expire after the Maturity Date shall end on such Maturity Date.

          Eurodollar Loan shall mean any loan during any period which bears
          ---------------
     interest at the Eurodollar Rate, or which would bear interest at such rate
     if the Maximum Rate ceiling was not in effect at a particular time.

          Eurodollar Margin shall mean the Eurodollar Margin on the Revolving
          -----------------
     Loan in effect from day to day shall be:

               (i)    three percent (3%) per annum whenever the Borrowing Base
          Usage is greater than 75%;

               (ii)   two and three-quarters percent (2.75%) per annum whenever
          the Borrowing Base Usage is greater than 50%, but less than or equal
          to 75%; or

               (iii)  two and one-half  percent (2.50%) per annum whenever the
          Borrowing Base Usage is 50% or less.

          Eurodollar Rate shall mean with respect to any Eurodollar Interest
          ---------------
     Period, the offered rate for U.S. Dollar deposits of not less than
     $1,000,000 as of 11:00 A.M. City of London, England time two (2) Eurodollar
     Business Days prior to the first date of each Eurodollar Interest Period as
     shown on the display designated as "British Bankers Assoc.  Interest
     Settlement Rates" on the Telerate system ("Telerate"), Page 3750 or Page
     3740, or such other page or pages as may replace such pages on Telerate for
     the purpose of displaying such rate. Provided, however, that if such rate
     is not available on Telerate then such offered rate shall be otherwise
     independently obtained by Agent from an alternate, substantially similar
     independent source available to Agent or shall be calculated by Agent by
     substantially similar methodology as that theretofore used to determine
     such offered rate in Telerate.

          Financial Statements shall mean balance sheets, income statements,
          --------------------
     statements of cash flow and appropriate footnotes and schedules, prepared
     in accordance with GAAP.

                                      -5-
<PAGE>

          Finley Sale shall mean the sale of certain oil and gas properties
          -----------
     pursuant to that certain Agreement of Purchase and Sale between Borrower
     and Finley Resources, Inc. dated April 20, 1999

          GAAP shall mean generally accepted accounting principles, consistently
          ----
     applied.

          Hedging Obligations is used herein as defined in Section 6 hereof.
          -------------------

          Initial Subsidiary Guarantors shall mean all material Subsidiaries of
          -----------------------------
     Borrower, including of Borrower, including T.W.O.C., Inc., a Delaware
     corporation, The Wiser Marketing Company, a Delaware corporation, Wiser Oil
     Delaware, Inc., a Delaware corporation, Lechuza Energy Company, a Delaware
     corporation, The Wiser Oil Company of Canada, a Nova Scotia unlimited
     liability company, Wiser Delaware LLC, a Delaware limited liability company
     and Wiser Northern Ireland, Ltd., a Delaware corporation.

          Interest Payment Date shall mean the last day of each calendar month
          ---------------------
     and, in addition, in the case of Eurodollar Loans, the last day of the
     applicable Interest Period.

          Interest Period shall mean any Prime Rate Interest Period, or
          ---------------
     Eurodollar Interest Period.

          Letters of Credit shall mean the term "Letters of Credit" is used
          -----------------
     herein as defined in Section 2(c) hereof.

          Lien shall mean any mortgage, deed of trust, pledge, security
          ----
     interest, assignment for security purposes, encumbrance or lien (statutory
     or otherwise) of every kind and character.

          Loan shall mean the Revolving Loan.
          ----

          Loan Documents shall mean this Agreement, the Notes, the Security
          --------------
     Instruments and all other documents executed in connection with the
     transaction described in this Agreement.

          Majority Banks shall mean Banks holding 66-2/3% or more of the
          --------------
     Commitment.

          Material Adverse Effect shall mean any circumstance or event which
          -----------------------
     could reasonably be expected to have a material adverse effect on (i) the
     assets or properties, liabilities, financial condition, business,
     operations, affairs or circumstances of the Borrower individually, or the
     Borrower and its Subsidiaries taken as a whole, or (ii) the ability of the
     Borrower, individually, or the Borrower and its Subsidiaries taken as a
     whole, to carry out their respective businesses as of the date of this
     Agreement or as proposed at the date of this Agreement to be conducted or
     to meet their obligations under the Notes, this Agreement or the other Loan
     Documents on a timely basis.

                                      -6-
<PAGE>

          Maximum Rate shall mean at any particular time in question, the
          ------------
     maximum non-usurious rate of interest which under applicable law may then
     be charged on the Note.  If such Maximum Rate changes after the date
     hereof, the Maximum Rate shall be automatically increased or decreased, as
     the case may be, without notice to Borrower from time to time as the
     effective date of each change in such Maximum Rate.

          Minimum Consolidated Interest Coverage Ratio shall mean Consolidated
          --------------------------------------------
     EBITDA for the period measured divided by Consolidated Interest Expense for
     the period being measured.

          Monthly Commitment Reduction is used herein, as defined in Section
          ----------------------------
     2(f) hereof.

          Notes shall mean the Revolving Notes, substantially in the form of
          -----
     Exhibit "B" hereto issued or to be issued hereunder to each Bank,
     respectively, to evidence the indebtedness to such Bank arising by reason
     of the Advances on the Revolving Loan, together with all modifications,
     renewals and extensions thereof or any part thereof.

          Oil and Gas Properties shall mean all oil, gas and mineral properties
          ----------------------
     and interests, related personal properties, in which Borrower grant to the
     Banks either a first and prior lien and security interest pursuant to
     Section 6 hereof or negative pledge pursuant to Section 13 hereof.

          Other Financing - is used herein as defined in Section 15(l) hereof.
          ---------------

          Payor is used herein as defined in Section 3(h) hereof.
          -----

          Permitted Liens shall mean (i) royalties, overriding royalties,
          ---------------
     reversionary interests, production payments and similar burdens; (ii) sales
     contracts or other arrangements for the sale of production of oil, gas or
     associated liquid or gaseous hydrocarbons which would not (when considered
     cumulatively with the matters discussed in clause (i) above) deprive
     Borrower or any Subsidiary of any material right in respect of Borrower's
     or any Subsidiary's assets or properties (except for rights customarily
     granted with respect to such contracts and arrangements); (iii) statutory
     Liens for taxes or other assessments that are not yet delinquent (or that,
     if delinquent, are being contested in good faith by appropriate
     proceedings, levy and execution thereon having been stayed and continue to
     be stayed and for which Borrower or any Subsidiary has set aside on its
     books adequate reserves in accordance with GAAP); (iv) easements, rights of
     way, servitudes, permits, surface leases and other rights in respect to
     surface operations, pipelines, grazing, logging, canals, ditches,
     reservoirs or the like, conditions, covenants and other restrictions, and
     easements of streets, alleys, highways, pipelines, telephone lines, power
     lines, railways and other easements and rights of way on, over or in
     respect of Borrower's or any Subsidiary's assets or properties and that do
     not individually or in the aggregate, cause a Material Adverse Effect; (v)
     materialmen's, mechanic's, repairman's, employee's, warehousemen's,
     landlord's, carrier's, pipeline's,

                                      -7-
<PAGE>

     contractor's, sub-contractor's, operator's, non-operator's (arising under
     operating or joint operating agreements), and other Liens (including any
     financing statements filed in respect thereof) incidental to obligations
     incurred by Borrower or any Subsidiary in connection with the construction,
     maintenance, development, transportation, storage or operation of
     Borrower's or any Subsidiary's assets or properties to the extent not
     delinquent (or which, if delinquent, are being contested in good faith by
     appropriate proceedings and for which Borrower or any Subsidiary has set
     aside on its books adequate reserves in accordance with GAAP); (vi) all
     contracts, agreements and instruments, and all defects and irregularities
     and other matters affecting Borrower's or any Subsidiary's assets and
     properties which were in existence at the time Borrower's or any
     Subsidiary's assets and properties were originally acquired by Borrower or
     any Subsidiary and all routine operational agreements entered into in the
     ordinary course of business, which contracts, agreements, instruments,
     defects, irregularities and other matters and routine operational
     agreements are not such as to, individually or in the aggregate, interfere
     materially with the operation, value or use of Borrower's or any
     Subsidiary's assets and properties, considered in the aggregate; (vii)
     liens in connection with workmen's compensation, unemployment insurance or
     other social security, old age pension or public liability obligations;
     (viii) legal or equitable encumbrances deemed to exist by reason of the
     existence of any litigation or other legal proceeding or arising out of a
     judgment or award with respect to which an appeal is being prosecuted in
     good faith and levy and execution thereon have been stayed and continue to
     be stayed; (ix) rights reserved to or vested in any municipality,
     governmental, statutory or other public authority to control or regulate
     Borrower's or any Subsidiary's assets and properties in any manner, and all
     applicable laws, rules and orders from any governmental authority; (x)
     landlord's liens; (xi) Liens incurred pursuant to the Security Instruments;
     and (xii) Liens existing at the date of this Agreement which have been
     disclosed to Banks in the Borrower's December 31, 1998 Financial Statements
     or identified in Schedule "1" hereto.

          Person shall mean an individual, a corporation, a partnership, an
          ------
     association, a trust or any other entity or organization, including a
     government or political subdivision or an agency or instrumentality
     thereof.

          Plan shall mean any plan subject to Title IV of ERISA and maintained
          ----
     by Borrower, or any such plan to which Borrower is required to contribute
     on behalf of its employees.

          Pre-Approved Contracts as used herein shall mean any contract or
          ----------------------
     agreement (i) to hedge, forward, sell or swap crude oil or natural gas or
     otherwise sell up to 75% of the Borrower's or any Subsidiary's monthly
     production forecast for all of Borrower's or any Subsidiary's proved
     producing oil and gas properties for the period covered by the proposed
     hedging transaction, (ii) with a maturity of twelve (12) months or less,
     (iii) with "strike prices" per barrel or MCF greater than the Agent's
     forecasted price in the most recent engineering evaluation of the
     Borrower's and such Subsidiary's oil and gas properties, adjusted for the
     difference between the forecasted price and the Borrower's actual product

                                      -8-
<PAGE>

     price as determined by Agent, and (iv) with counter-parties to the hedging
     agreement which are approved by Agent.

          Prime Rate shall mean as of any date, the fluctuating rate of interest
          ----------
     per annum established from time to time by Agent as its Prime Rate (which
     rate of interest may not be the lowest, best or most favorable rate of
     interest which Agent may charge on loans to its customers).  Each change in
     the Prime Rate shall become effective without prior notice to Borrower
     automatically as of the opening of business on the date of such change in
     the Prime Rate.

          Prime Rate Interest Period shall mean with respect to any Prime Rate
          --------------------------
     Loan, the period ending on the last day of each month, provided, however,
     that (i) if any Prime Rate Interest Period would end on a day which is not
     a Business Day, such Interest Period shall be extended to the next
     succeeding Business Day, and (ii) if any Prime Rate Interest Period would
     otherwise end after the Maturity Date such Interest Period shall end on the
     Maturity Date.

          Prime Rate Loan shall mean any loan during any period which bears
          ---------------
     interest based upon the Prime Rate or which would bear interest based upon
     the Prime Rate if the Maximum Rate ceiling was not in effect at that
     particular time.

          Prime Rate Margin shall be 0%.
          -----------------
 .
          Pro Rata or Pro Rata Part shall mean for each Bank, (i) for all
          -------------------------
     purposes where no Loan is outstanding, such Bank's Revolving Commitment
     Percentage and (ii) otherwise, the proportion which the portion of the
     outstanding Loan owed to such Bank bears to the aggregate outstanding Loans
     owed to all Banks at the time in question (calculated separately for each
     Bank).

          Reimbursement Obligations shall mean at any time, the obligations of
          -------------------------
     the Borrower in respect of all Letters of Credit then outstanding to
     reimburse amounts paid by any Bank in respect of any drawing or drawings
     under a Letter of Credit.

          Required Payment is used herein as defined in Section 3(i) hereof.
          ----------------

          Revolving Commitment shall mean (A) For all Banks, the lesser of (i)
          --------------------                                   ------
     $25,000,000 or (ii) the Borrowing Base, in each case as reduced from time
     to time pursuant to Sections 2 and 7 hereof, and (B) as to any Bank, its
     obligation to make Advances hereunder on the Loan and purchase
     participations in Letters of Credit issued hereunder by the Agent in
     amounts not exceeding, in the aggregate, an amount equal to such Bank's
     Revolving Loan Commitment Percentage times the total Revolving Commitment
     as of any date. The Revolving Commitment of each Bank hereunder shall be
     adjusted from time to time to reflect assignments made by such Bank
     pursuant to Section 28 hereof.  Each reduction in the

                                      -9-
<PAGE>

     Revolving Commitment shall result in a Pro Rata reduction in each Bank's
     Revolving Commitment.

          Revolving Commitment Percentage shall mean for each Bank the
          -------------------------------
     percentage derived by dividing its Revolving Commitment at the time of the
     determination by the Revolving Commitment of all Banks at the time of
     determination.  The Revolving Commitment Percentage of each Bank hereunder
     shall be adjusted from time to time to reflect assignments made by such
     Bank pursuant to Section 28 hereof.

          Revolving Loan shall mean loan or loans made under the Revolving
          --------------
     Commitment pursuant to Section 2 hereof.

          Revolving Maturity Date shall mean April 30, 2001.
          -----------------------

          Revolving Notes shall mean the Revolving Notes described in Section 3
          ---------------
     hereof.

          Security Instruments is used collectively herein to mean this
          --------------------
     Agreement, all Deeds of Trust, Mortgages, Security Agreements, Assignments
     of Production and Financing Statements, all Assignments of Notes and Liens,
     Assignments and Acceptance Agreements, and other collateral and assignment
     documents covering the Oil and Gas Properties and related personal
     property, equipment, oil and gas inventory, and proceeds of the foregoing,
     all such documents to be in form and substance satisfactory to Agent.

          Subordinate Notes shall mean Borrower's Senior Subordinated Notes due
          -----------------
     2007 in an aggregate amount of $125,000,000 issued pursuant to and governed
     by the Subordinate Notes Indenture.

          Subordinate Notes Indenture shall mean an Indenture dated May 21,
          ---------------------------
     1997, entered into by and between Borrower and Texas Commerce Bank National
     Association, as Trustee.

          Subsidiary shall mean for any Person, any corporation or other entity
          ----------
     of which securities or other ownership interests having ordinary voting
     power to elect a majority of the board of directors or other Persons
     performing similar functions are at the time directly or indirectly owned
     by such Person or any Subsidiary of such Person.

          Subsidiary Guarantor shall mean any Subsidiary of Borrower that has
          --------------------
     executed and delivered a Subsidiary Guaranty which is in full force and
     effect.

          Subsidiary Guaranty shall mean a Guaranty in the form of Exhibit "C"
          -------------------
     hereto to be executed by individual Subsidiaries of Borrower pursuant to
     the provisions of this Agreement and pursuant to which each such Subsidiary
     shall guaranty payment and performance in full of all amounts due the Banks
     hereunder.

                                      -10-
<PAGE>

          Total Outstandings shall mean as of any date, the sum of (i) the total
          ------------------
     principal balance outstanding on the Revolving Notes, plus (ii) the total
     face amount of all outstanding Letters of Credit, plus (iii) the total
     amount of all unpaid Reimbursement Obligations.

          Tranche shall mean a set of Eurodollar Loans made by the Banks at the
          -------
     same time and for the same Interest Period.

          Unscheduled Redeterminations shall mean a redetermination of the
          ----------------------------
     Borrowing Base made at any time other than on the dates set for the regular
     semi-annual redetermination of the Borrowing Base which are made (A) at the
     reasonable request of Borrower, (B) at any time it appears to Agent or
     Majority Banks, in the exercise of their reasonable discretion, that either
     (i) there has been a material decrease in the value of the Oil and Gas
     Properties, or (ii) an event has occurred which is reasonably expected to
     have a Material Adverse Effect.

      2.  Commitments of the Bank.

          (a)  Terms of Revolving Commitment.  On the terms and conditions
               -----------------------------
     hereinafter set forth, each Bank agrees severally to make Advances to the
     Borrower from time to time during the period beginning on the Effective
     Date and ending on the Revolving Maturity Date in such amounts as the
     Borrower may request up to an amount not to exceed, in the aggregate
     principal amount at any time, the Revolving Commitment less the Total
     Outstandings.  The obligation of the Borrower hereunder shall be evidenced
     by this Agreement and the Revolving Notes issued in connection herewith,
     said Revolving Notes to be as described in Section 3 hereof.
     Notwithstanding any other provision of this Agreement, no Advance shall be
     required to be made hereunder if any Event of Default (as hereinafter
     defined) has occurred and is continuing or if any event or condition has
     occurred or failed to occur which with the passage of time or service of
     notice, or both, would constitute an Event of Default.  Each Advance under
     the Revolving Commitment shall be an aggregate amount of at least $500,000
     or an integral multiple of $100,000 in excess thereof.  Irrespective of the
     face amount of the Revolving Note or Notes, the Banks shall never have the
     obligation to Advance any amount or amounts in excess of the Revolving
     Commitment or to increase the Revolving Commitment.  The total number of
     Tranches under the Revolving Commitment which may be outstanding at any
     time hereunder shall never exceed three (3).

          (b)  Procedure for Borrowing.  Whenever the Borrower desires an
               -----------------------
     Advance hereunder, it shall give Agent telegraphic, telex, facsimile or
     telephonic notice ("Notice of Borrowing") of such requested Advance, which
     in the case of telephonic notice, shall be promptly confirmed in writing.
     Each Notice of Borrowing shall be in the form of Exhibit "A" attached
     hereto and shall be received by Agent not later than 11:00 a.m. Dallas,
     Texas time, (i) one Business Day prior to the Borrowing Date in the case of
     the Prime Rate Loan, or (ii) three Eurodollar Business Days prior to any
     proposed Borrowing Date in the case of Eurodollar Loan.  Each Notice of
     Borrowing shall specify (i) the Borrowing Date

                                      -11-
<PAGE>

     (which, if at Prime Rate Loan, shall be a Business Day and if a Eurodollar
     Loan, a Eurodollar Business Day), (ii) the principal amount to be borrowed,
     (iii) the portion of the Advance constituting Prime Rate Loan and/or
     Eurodollar Loan, (iv) if any portion of the proposed Advance is to
     constitute Eurodollar Loan, the initial Interest Period selected by
     Borrower pursuant to Section 4 hereof to be applicable thereto, and (v) the
     date upon which such Advance is required. Upon receipt of such Notice,
     Agent shall advise each Bank thereof; provided, that if the Banks have
     received at least one (1) day's notice of such Advance prior to funding of
     a Prime Rate Loan, or at least three (3) days' notice of each Advance prior
     to funding in the case of a Eurodollar Loan, each Bank shall provide Agent
     at its office at 1717 Main Street, Dallas, Texas 75201, not later than 1:00
     p.m., Dallas, Texas time, on the Borrowing Date, in immediately available
     funds, its pro rata share of the requested Advance, but the aggregate of
     all such fundings by each Bank shall never exceed such Bank's Revolving
     Commitment Not later than 2:00 p.m., Dallas, Texas time, on the Borrowing
     Date, Agent shall make available to the Borrower at the same office, in
     like funds, the aggregate amount of such requested Advance. Neither Agent
     nor any Bank shall incur any liability to the Borrower in acting upon any
     Notice referred to above which Agent or such Bank believes in good faith to
     have been given by a duly authorized officer or other person authorized to
     borrow on behalf of Borrower or for otherwise acting in good faith under
     this Section 2(c). Upon funding of Advances by Banks in accordance with
     this Agreement, pursuant to any such Notice, the Borrower shall have
     effected Advances hereunder.

          (c)  Letters of Credit.  On the terms and conditions hereinafter set
               -----------------
     forth, the Agent shall from time to time during the period beginning on the
     Effective Date and ending on the Revolving Maturity Date upon request of
     Borrower issue standby Letters of Credit for the account of Borrower (the
     "Letters of Credit") in such face amounts as Borrower may request, but not
     to exceed in the aggregate face amount at any time outstanding the sum of
     Two Million Dollars ($2,000,000).  The face amount of all Letters of Credit
     issued and outstanding hereunder shall be considered as Advances on the
     Revolving Commitment for Borrowing Base purposes and all payments made by
     the Agent on such Letters of Credit shall be considered as Advances under
     the Revolving Notes.  Each Letter of Credit issued for the account of
     Borrower hereunder shall (i) be in favor of such beneficiaries as
     specifically requested by Borrower, (ii) have an expiration date not
     exceeding the earlier of (a) one year or (b) the Revolving Maturity Date,
     and (iii) contain such other terms and provisions as may be required by
     issuing Bank.  Each Bank (other than Agent) agrees that, upon issuance of
     any Letter of Credit hereunder, it shall automatically acquire a
     participation in the Agent's liability under such Letter of Credit in an
     amount equal to such Bank's Revolving Commitment Percentage of such
     liability, and each Bank (other than Agent) thereby shall absolutely,
     unconditionally and irrevocably assume, as primary obligor and not as
     surety, and shall be unconditionally obligated to Agent to pay and
     discharge when due, its Revolving Commitment Percentage of Agent's
     liability under such Letter of Credit.  The Borrower, hereby
     unconditionally agrees to pay and reimburse the Agent for the amount of
     each demand for payment under any Letter of Credit that is in substantial
     compliance with the provisions of any such Letter of Credit at or prior to
     the date on which payment is to be

                                      -12-
<PAGE>

     made by the Agent to the beneficiary thereunder, without presentment,
     demand, protest or other formalities of any kind. Upon receipt from any
     beneficiary of any Letter of Credit of any demand for payment under such
     Letter of Credit, the Agent shall promptly notify the Borrower of the
     demand and the date upon which such payment is to be made by the Agent to
     such beneficiary in respect of such demand. Forthwith upon receipt of such
     notice from the Agent, Borrower shall advise the Agent whether or not it
     intends to borrow hereunder to finance their obligations to reimburse the
     Agent, and if so, submit a Notice of Borrowing as provided in Section 2(c)
     hereof. If Borrower fail to so advise Agent and thereafter fail to
     reimburse Agent, the Agent shall notify each Bank of the demand and the
     failure of the Borrower to reimburse the Agent, and each Bank shall
     reimburse the Agent for its Revolving Commitment Percentage of each such
     draw paid by the Agent and unreimbursed by the Borrower. All such amounts
     paid by Agent and/or reimbursed by the Banks shall be treated as an Advance
     or Advances under the Revolving Commitment, which Advances shall be
     immediately due and payable and shall bear interest at the Maximum Rate.

          (d)  Procedure for Obtaining Letters of Credit.  The amount and date
               -----------------------------------------
     of issuance, renewal, extension or reissuance of a Letter of Credit
     pursuant to the Banks' commitments above in Section 2(e) shall be
     designated by Borrower's written request delivered to Agent at least three
     (3) Business Days prior to the date of such issuance, renewal, extension or
     reissuance.  Concurrently with or promptly following the delivery of the
     request for a Letter of Credit, Borrower shall execute and deliver to the
     Agent an application and agreement with respect to the Letters of Credit,
     said application and agreement to be in the form used by the Agent.  The
     Agent shall not be obligated to issue, renew, extend or reissue such
     Letters of Credit if (A) the amount thereon when added to the face amount
     of the outstanding Letters of Credit plus any Reimbursement Obligations
     exceeds Two Million Dollars ($2,000,000) or (B) the amount thereof when
     added to the Total Outstandings would exceed the Revolving Commitment.
     Borrower agrees to pay the Agent for the benefit of the Banks commissions
     for issuing the Letters of Credit (calculated separately for each Letter of
     Credit) in an amount equal to the greater of (i) one and one-half percent
     (1.5%) per annum on the maximum face amount of the Letter of Credit or (ii)
     $500.00.  Such commissions shall be payable prior to the issuance of each
     Letter of Credit and thereafter on each anniversary date of such issuance
     while such Letter of Credit is outstanding.

          (e)  Voluntary Reduction of Revolving Commitment.  The Borrower may at
               -------------------------------------------
     any time, or from time to time, upon not less than three (3) Business Days'
     prior written notice to Agent, reduce or terminate the Revolving
     Commitment; provided, however, that (i) each reduction in the Revolving
     Commitment must be in the amount of $500,000 or more, in increments of
     $100,000 and (ii) each reduction must be accompanied by a prepayment of the
     Revolving Notes in the amount by which the outstanding principal balance of
     the Revolving Notes exceeds the Revolving Commitment as reduced pursuant to
     this Section 2.

          (f)  Monthly Commitment Reductions - The Borrowing Base and the
               -----------------------------
     Revolving Commitment shall be reduced as of the last day of each month (the
     "Monthly Commitment

                                      -13-
<PAGE>

     Reduction") during the period beginning May 31, 1999 and continuing
     thereafter until redetermined pursuant to Section 7(b) hereof by $0 per
     month. If as a result of any such Monthly Commitment Reduction, the Total
     Outstandings ever exceed the Revolving Commitment then in effect, the
     Borrower shall make the mandatory prepayment of principal required pursuant
     to Section 9(b) hereof.

          (g)  Several Obligations.  The obligations of the Banks under the
               -------------------
     Commitment is several and not joint.  The failure of any Bank to make an
     Advance required to be made by it shall not relieve any other Bank of its
     obligation to make its Advance, and no Bank shall be responsible for the
     failure of any other Bank to make the Advance to be made by such other
     Bank.  No Bank shall be required to lend hereunder any amount in excess of
     its legal lending limit.

     3.   Notes Evidencing Loan.  The Loan described above in Section 2 shall be
evidenced by promissory notes of Borrower as follows:

          (a)  Form of Revolving Notes - The Revolving Loan shall be evidenced
               -----------------------
     by a Note or Notes in the aggregate face amount of $25,000,000, and shall
     be in the form of Exhibit "B" hereto with appropriate insertions (each a
     "Revolving Note"). Notwithstanding the face amount of the Revolving Notes,
     the actual principal amount due from the Borrower to Banks on account of
     the Revolving Notes, as of any date of computation, shall be the sum of
     Advances then and theretofore made on account thereof, less all principal
     payments actually received by Banks in collected funds with respect
     thereto. Although the Revolving Notes may be dated as of the Effective
     Date, interest in respect thereof shall be payable only for the period
     during which the Loan evidenced thereby are outstanding and, although the
     stated amount of the Revolving Notes may be higher, the Revolving Notes
     shall be enforceable, with respect to Borrower's obligation to pay the
     principal amount thereof, only to the extent of the unpaid principal amount
     of the Loan. Irrespective of the face amount of the Revolving Notes, no
     Bank shall ever be obligated to advance on the Revolving Commitment any
     amount in excess of its Revolving Commitment then in effect.

          (b)  Issuance of Additional Notes - At the Effective Date there shall
               ----------------------------
     be outstanding one (1) Revolving Note in the aggregate face amount of
     $25,000,000 payable to the order of Bank One.  From time to time new Notes
     may issued to other Banks as such Banks become parties to this Agreement.
     Upon request from Agent, the Borrower shall execute and deliver to Agent
     any such new or additional Notes.  From time to time as new Notes are
     issued the Agent shall require that each Bank exchange their Notes for
     newly issued Notes to better reflect the extent of each Bank's Commitment
     hereunder.

          (c)  Interest Rates - The unpaid principal balance of the Notes shall
               --------------
     bear interest from time to time as set forth in Section 4 hereof.

                                      -14-
<PAGE>

          (d) Payment of Interest - Interest on the Notes shall be payable on
              -------------------
     each Interest Payment Date.

          (e) Payment of Principal - Principal of the Revolving Note or Notes
              --------------------
     shall be due and payable to the Agent for the ratable benefit of the Banks
     on the Revolving Maturity Date unless earlier due in whole or in part as a
     result of an acceleration of the amount due or pursuant to the mandatory
     prepayment provisions of Section 9(b) or 9(c) hereof.

          (f) Payment to Banks - Each Bank's Pro Rata Part of payment or
              ----------------
     prepayment of the Loan shall be directed by wire transfer to such Bank by
     the Agent at the address provided to the Agent for such Bank for payments
     no later than 2:00 p.m., Dallas, Texas, time on the Business Day such
     payments or prepayments are deemed hereunder to have been received by
     Agent; provided, however, in the event that any Bank shall have failed to
     make an Advance as contemplated under Section 2 hereof (a "Defaulting
     Bank") and the Agent or another Bank or Banks shall have made such Advance,
     payment received by Agent for the account of such Defaulting Bank or Banks
     shall not be distributed to such Defaulting Bank or Banks until such
     Advance or Advances shall have been repaid in full to the Bank or Banks who
     funded such Advance or Advances.  Any payment or prepayment received by
     Agent at any time after 12:00 noon, Dallas, Texas, time on a Business Day
     shall be deemed to have been received on the next Business Day.  Interest
     shall cease to accrue on any principal as of the end of the day preceding
     the Business Day on which any such payment or prepayment is deemed
     hereunder to have been received by Agent.  If Agent fails to transfer any
     principal amount to any Bank as provided above, then Agent shall promptly
     direct such principal amount by wire transfer to such Bank.

          (g) Sharing of Payments, Etc. - If any Bank shall obtain any payment
              -------------------------
     (whether voluntary, involuntary, or otherwise) on account of the Loan,
     (including, without limitation, any set-off) which is in excess of its Pro
     Rata Part of payments on either of the Loan, as the case may be, obtained
     by all Banks, such Bank shall purchase from the other Banks such
     participation as shall be necessary to cause such purchasing Bank to share
     the excess payment pro rata with each of them; provided that, if all or any
     portion of such excess payment is thereafter recovered from such purchasing
     Bank, the purchase shall be rescinded and the purchase price restored to
     the extent of the recovery.  The Borrower agrees that any Bank so
     purchasing a participation from another Bank pursuant to this Section may,
     to the fullest extent permitted by law, exercise all of its rights of
     payment (including the right of offset) with respect to such participation
     as fully as if such Bank were the direct creditor of the Borrower in the
     amount of such participation.

          (h) Non-Receipt of Funds by the Agent - Unless the Agent shall have
              ---------------------------------
     been notified by a Bank or the Borrower (the "Payor") prior to the date on
     which such Bank is to make payment to the Agent of the proceeds of a Loan
     to be made by it hereunder or the Borrower is to make a payment to the
     Agent for the account of one or more of the Banks, as the case may be (such
     payment being herein called the "Required Payment"), which notice

                                      -15-
<PAGE>

     shall be effective upon receipt, that the Payor does not intend to make the
     Required Payment to the Agent, the Agent may assume that the Required
     Payment has been made and may, in reliance upon such assumption (but shall
     not be required to), make the amount thereof available to the intended
     recipient on such date and, if the Payor has not in fact made the Required
     Payment to the Agent, the recipient of such payment shall, on demand, pay
     to the Agent the amount made available to it together with interest thereon
     in respect of the period commencing on the date such amount was made
     available by the Agent until the date the Agent recovers such amount at the
     rate applicable to such portion of the applicable Loan.

     4.   Interest Rates.

          (a) Options.
              -------

              (i)    Prime Rate Loan.  On all Prime Rate Loans, Borrower agrees
                     ---------------
          to pay interest on the Notes calculated on the basis of the actual
          days elapsed in a year consisting of 360 days with respect to the
          unpaid principal amount of each Prime Rate Loan from the date the
          proceeds thereof are made available to Borrower until maturity
          (whether by acceleration or otherwise), at a varying rate per annum
          equal to the lesser of (i) the Maximum Rate (defined herein), or (ii)
          the sum of the Prime Rate plus the Prime Rate Margin.  Subject to the
          provisions of this Agreement as to prepayment, the principal of the
          Notes representing Prime Rate Loan shall be payable as specified in
          Section 3(f) hereof and the interest in respect of each Prime Rate
          Loan shall be payable on each Interest Payment Date.  Past due
          principal and, to the extent permitted by law, past due interest in
          respect to each Prime Rate Loan, shall bear interest, payable on
          demand, at a rate per annum equal to the Maximum Rate.

              (ii)   Eurodollar Loan.  On all Eurodollar Loans, Borrower agrees
                     ---------------
          to pay interest calculated on the basis of a year consisting of 360
          days with respect to the unpaid principal amount of each Eurodollar
          Loan from the date the proceeds thereof are made available to Borrower
          until maturity (whether by acceleration or otherwise), at a varying
          rate per annum equal to the lesser of (i) the Maximum Rate, or (ii)
          the Eurodollar Rate plus the Eurodollar Margin.  Subject to the
          provisions of this Agreement with respect to prepayment, the principal
          of the Notes shall be payable as specified in Section 3(f) hereof and
          the interest with respect to each Eurodollar Loan shall be payable on
          each Interest Payment Date.  Past due principal and, to the extent
          permitted by law, past due interest shall bear interest, payable on
          demand, at a rate per annum equal to the Maximum Rate.  Upon three (3)
          Eurodollar Business Days' written notice prior to the making by the
          Banks of any Eurodollar Loan (in the case of the initial Interest
          Period therefor) or the expiration date of each succeeding Interest
          Period (in the case of subsequent

                                      -16-
<PAGE>

          Interest Periods therefor), Borrower shall have the option, subject to
          compliance by Borrower with all of the provisions of this Agreement,
          as long as no Event of Default exists, to specify whether the Interest
          Period commencing on any such date shall be a one (1), two (2), three
          (3) or six (6) month period. If Agent shall not have received timely
          notice of a designation of such Interest Period as herein provided,
          Borrower shall be deemed to have elected to convert all maturing
          Eurodollar Loan to Prime Rate Loan.

          (b) Interest Rate Determination.  The Agent shall determine each
              ---------------------------
     interest rate applicable to the Loan hereunder.  The Agent shall give
     prompt notice to the Borrower and the Banks of each rate of interest so
     determined and its determination thereof shall be conclusive absent error.

          (c) Conversion Option.  Borrower may elect from time to time (i) to
              -----------------
     convert all or any part of its Eurodollar Loan to Prime Rate Loan by giving
     Agent irrevocable notice of such election in writing prior to 10:00 a.m.
     (Dallas, Texas time) on the conversion date and such conversion shall be
     made on the requested conversion date, provided that any such conversion of
     Eurodollar Loan shall only be made on the last day of the Eurodollar
     Interest Period with respect thereof, (ii) to convert all or any part of
     its Prime Rate Loan to Eurodollar Loan by giving the Agent irrevocable
     written notice of such election three (3) Eurodollar Business Days prior to
     the proposed conversion and such conversion shall be made on the requested
     conversion date or, if such requested conversion date is not a Eurodollar
     Business Day or a Business Day, as the case may be, on the next succeeding
     Eurodollar Business Day or Business Day, as the case may be.  Any such
     conversion shall not be deemed to be an Advance or a prepayment of any of
     the loans for purposes of this Agreement on the Note.

          (d) Recoupment.  If at any time the applicable rate of interest
              ----------
     selected pursuant to Sections 4(a)(i) or 4(a)(ii) above shall exceed the
     Maximum Rate, thereby causing the interest on the Notes to be limited to
     the Maximum Rate, then any subsequent reduction in the interest rate so
     selected or subsequently selected shall not reduce the rate of interest on
     the Notes below the Maximum Rate until the total amount of interest accrued
     on the Note equals the amount of interest which would have accrued on the
     Notes if the rate or rates selected pursuant to Sections 4(a)(i) or (ii),
     as the case may be, had at all times been in effect.

     5.   Change of Circumstances.

          (a) Unavailability of Funds or Inadequacy of Pricing.  In the event
              ------------------------------------------------
     that, in connection with any proposed Eurodollar Loan, the Agent
     determines, which determination shall, absent manifest error, be final,
     conclusive and binding upon all parties, due to changes in circumstances
     since the date hereof, adequate and fair means do not exist for determining
     the Eurodollar Rate or such rate will not accurately reflect the costs to
     the Banks of funding Eurodollar Loan for such Eurodollar Interest Period,
     the Agent shall give notice of such

                                      -17-
<PAGE>

     determination to the Borrower and the Banks, whereupon, until the Agent
     notifies the Borrower and the Banks that the circumstances giving rise to
     such suspension no longer exist, the obligations of the Banks to make,
     continue or convert Loan into Eurodollar Loan shall be suspended, and all
     loans to Borrower shall be Prime Rate Loan during the period of suspension.

          (b) Change in Laws.  If at any time any new law or any change in
              --------------
     existing laws or in the interpretation of any new or existing laws shall
     make it unlawful for any Bank to make or continue to maintain or fund
     Eurodollar Loan hereunder, then such Bank shall promptly notify Borrower in
     writing and such Bank's obligation to make, continue or convert Loan into
     Eurodollar Loan under this Agreement shall be suspended until it is no
     longer unlawful for such Bank to make or maintain Eurodollar Loan.  Upon
     receipt of such notice, Borrower shall either repay the outstanding
     Eurodollar Loan owed to the Banks, without penalty, on the last day of the
     current Interest Periods (or, if any Bank may not lawfully continue to
     maintain and fund such Eurodollar Loan, immediately), or Borrower may
     convert such Eurodollar Loan at such appropriate time to Prime Rate Loan.

          (c) Increased Cost or Reduced Return.
              --------------------------------

              (i)    If, after the date hereof, the adoption of any applicable
          law, rule, or regulation, or any change in any applicable law, rule,
          or regulation, or any change in the interpretation or administration
          thereof by any governmental authority, central bank, or comparable
          agency charged with the interpretation or administration thereof, or
          compliance by any Bank with any request or directive (whether or not
          having the force of law) of any such governmental authority, central
          bank, or comparable agency:

                     (A) shall subject such Bank to any tax, duty, or other
              charge with respect to any Eurodollar Loan, its Notes, or its
              obligation to make Eurodollar Loan, or change the basis of
              taxation of any amounts payable to such Bank under this Agreement
              or its Notes in respect of any Eurodollar Loan (other than
              franchise taxes and taxes imposed on the overall net income of
              such Bank);

                     (B) shall impose, modify, or deem applicable any reserve,
              special deposit, assessment, or similar requirement (other than
              reserve requirements, if any, taken into account in the
              determination of the Eurodollar Rate) relating to any extensions
              of credit or other assets of, or any deposits with or other
              liabilities or commitments of, such Bank, including the Commitment
              of such Bank hereunder; or

                                      -18-
<PAGE>

                     (C) shall impose on such Bank or on the London interbank
              market any other condition affecting this Agreement or its Notes
              or any of such extensions of credit or liabilities or commitments;

          and the result of any of the foregoing is to increase the cost to such
          Bank of making, converting into, continuing, or maintaining any
          Eurodollar Loan or to reduce any sum received or receivable by such
          Bank under this Agreement or its Notes with respect to any Eurodollar
          Loan, then  Borrower shall pay to such Bank on demand such amount or
          amounts as will compensate such Bank for such increased cost or
          reduction.  If any Bank requests compensation by Borrower under this
          Section 5(c), Borrower may, by notice to such Bank (with a copy to
          Agent), suspend the obligation of such Bank to make or continue
          Eurodollar Loan, or to convert all or part of the Prime Rate Loan
          owing to such Bank to Eurodollar Loan, until the event or condition
          giving rise to such request ceases to be in effect (in which case the
          provisions of Section 5(c) shall be applicable); provided that such
                                                           --------
          suspension shall not affect the right of such Bank to receive the
          compensation so requested.

              (ii)   If, after the date hereof, any Bank shall have determined
          that the adoption of any applicable law, rule, or regulation regarding
          capital adequacy or any change therein or in the interpretation or
          administration thereof by any governmental authority, central bank, or
          comparable agency charged with the interpretation or administration
          thereof, or any request or directive regarding capital adequacy
          (whether or not having the force of law) of any such governmental
          authority, central bank, or comparable agency, has or would have the
          effect of reducing the rate of return on the capital of such Bank or
          any corporation controlling such Bank as a consequence of such Bank's
          obligations hereunder to a level below that which such Bank or such
          corporation could have achieved but for such adoption, change,
          request, or directive (taking into consideration its policies with
          respect to capital adequacy), then from time to time upon demand
          Borrower shall pay to such Bank such additional amount or amounts as
          will compensate such Bank for such reduction.

              (iii)  Each Bank shall promptly notify Borrower and Agent of any
          event of which it has knowledge, occurring after the date hereof,
          which will entitle such Bank to compensation pursuant to this Section
          5(c) and will designate a separate lending office, if applicable, if
          such designation will avoid the need for, or reduce the amount of,
          such compensation and will not, in the judgment of such Bank, be
          otherwise disadvantageous to it.  Any Bank claiming compensation under
          this Section 5(c) shall furnish to Borrower and Agent a statement
          setting forth the additional amount or amounts to be paid to it
          hereunder which shall be conclusive in the absence of manifest error.
          In determining such amount, such Bank may use any reasonable averaging
          and attribution methods.

                                      -19-
<PAGE>

              (iv)   Any Bank giving notice to the Borrower through the Agent,
          pursuant to Sections 3(k) or 5(c) shall give to the Borrower a
          statement signed by an officer of such Bank setting forth in
          reasonable detail the basis for, and the calculation of such
          additional cost, reduced payments or capital requirements, as the case
          may be, and the additional amounts required to compensate such Bank
          therefor.

              (v)    Within five (5) Business Days after receipt by the Borrower
          of any notice referred to in Sections 3(k) or 5(c), the Borrower shall
          pay to the Agent for the account of the Bank issuing such notice such
          additional amounts as are required to compensate such Bank for the
          increased cost, reduce payments or increase capital requirements
          identified therein, as the case may be.

          (d) Discretion of Bank as to Manner of Funding.  Notwithstanding any
              ------------------------------------------
     provisions of this Agreement to the contrary, each Bank shall be entitled
     to fund and maintain its funding of all or any part of its Loan in any
     manner it sees fit, it being understood, however, that for the purposes of
     this Agreement all determinations hereunder shall be made as if each Bank
     had actually funded and maintained each Eurodollar Loan through the
     purchase of deposits having a maturity corresponding to the last day of the
     Eurodollar Interest Period applicable to such Eurodollar Loan and bearing
     an interest rate to the applicable interest rate for such Eurodollar
     Period.

          (e) Breakage Fees.   Without duplication under any other provision
              -------------
     hereof, if any Bank incurs any loss, cost or expense including, without
     limitation, any loss of profit and loss, cost, expense or premium
     reasonably incurred by reason of the liquidation or re-employment of
     deposits or other funds acquired by such Bank to fund or maintain any
     Eurodollar Loan or the relending or reinvesting of such deposits or amounts
     paid or prepaid to the Banks as a result of any of the following events
     other than any such occurrence as a result in the change of circumstances
     described in Sections 5(a) and (b):

              (i)    any payment, prepayment or conversion of a Eurodollar Loan
          on a date other than the last day of its Eurodollar Interest Period
          (whether by acceleration, prepayment or otherwise);

              (ii)   any failure to make a principal payment of a Eurodollar
          Loan on the due date thereof; or

              (iii)  any failure by the Borrower to borrow, continue, prepay or
          convert to a Eurodollar Loan on the dates specified in a notice given
          pursuant to Section 2(c) or 4(c) hereof;

     then the Borrower shall pay to such Bank such amount as will reimburse such
     Bank for such loss, cost or expense.  If any Bank makes such a claim for
     compensation, it shall furnish to Borrower and Agent a statement setting
     forth the amount of such loss, cost or expense in

                                      -20-
<PAGE>

     reasonable detail (including an explanation of the basis for and the
     computation of such loss, cost or expense) and the amounts shown on such
     statement shall be conclusive and binding absent manifest error.

     6.   Collateral Security.  To secure the performance by Borrower of its
obligations hereunder, and under the Notes and Security Instruments, whether now
or hereafter incurred, matured or unmatured, direct or contingent, joint or
several, or joint and several, including extensions, modifications, renewals and
increases thereof, and substitutions therefore, Borrower shall contemporaneously
herewith grant and assign to Agent for the ratable benefit of the Banks a first
and prior Lien on (i) certain of its Oil and Gas Properties, certain related
equipment, oil and gas inventory, and proceeds of the foregoing and (ii) the
stock of all of Borrower's Subsidiaries.  The Oil and Gas Properties heretofore
and herewith mortgaged to the Agent shall represent not less than $100,000,000
in Engineered Value (as hereinafter defined) of Borrower's Oil and Gas
Properties as of the Effective Date.  Obligations arising from transactions
between Borrower and one or more of the Banks providing for the hedging, forward
sale or swap or crude oil or natural gas or interest rate protection ("Hedging
Obligations") shall be secured by the Collateral.   The Hedging Obligations
shall be secured and repaid on a pari passu basis with the indebtedness and
obligations of the Borrower under the Loan Documents.  All Oil and Gas
Properties, stock and other collateral in which Borrower have heretofore granted
to Bank One, or herewith granted or hereafter grants to Agent for the ratable
benefit of the Banks a first and prior Lien (to the satisfaction of the Agent)
in accordance with this Section 6, as such properties and interests are from
time to time constituted, are hereinafter collectively called the "Collateral".

     The granting and assigning of such security interests and Liens by Borrower
shall be pursuant to Security Instruments in form and substance reasonably
satisfactory to the Agent.  Concurrently with the delivery of each of the
Security Instruments or within a reasonable time thereafter, Borrower shall
furnish to the Agent mortgage and title opinions and other title information
satisfactory to Agent with respect to the title and Lien status of Borrower's
interests in not less than 90% of the Engineered Value of the Oil and Gas
Properties covered by the Security Instruments as Agent shall have designated.
"Engineered Value" for this purpose shall mean future net revenues discounted at
the discount rate being used by the Agent as of the date of any such
determination utilizing the pricing parameters used in the engineering report
furnished to the Agent for the ratable benefit of the Banks, pursuant to
Sections 7 and 12 hereof.  Borrower will cause to be executed and delivered to
the Agent, in the future, additional Security Instruments if the Agent
reasonably deems such are necessary to insure perfection or maintenance of
Banks' security interests and Liens in the Oil and Gas Properties or any part
thereof.

     7.   Borrowing Base.

          (a) Initial Borrowing Base. At the Effective Date (assuming that the
              ----------------------
     Finley Sale and the Appalachia Sale have not closed), the Borrowing Base
     shall be $13,000,000. Provided, however, that (i) if the Finley Sale closes
     prior to the Appalachia Sale, the Borrowing Base shall be reduced to
     $10,000,000 until the Appalachia Sale closes, (ii) when

                                      -21-
<PAGE>

     and if the Appalachia Sale closes, whether prior to the Finley Sale, at the
     same time as the Finley Sale, or after the Finley Sale, the Borrowing Base
     shall be reduced to $8,000,000 and (iii) in any event on July 31, 1999, the
     Borrowing Base shall be reduced to $8,000,000 regardless of whether either
     the Finley Sale or the Appalachia Sale has closed.

          (b) Subsequent Determinations of Borrowing Base.  Subsequent
              -------------------------------------------
     determinations of the Borrowing Base shall be made by the Banks at least
     semi-annually on May 1 and November 1 of each year beginning November 1,
     1999 or as Unscheduled Redeterminations. In connection with, and as of,
     each determination of the Borrowing Base, the Banks shall also redetermine
     the Monthly Commitment Reduction.  The Borrower shall furnish to the Banks
     as soon as possible but in any event no later than April 1 of each year,
     beginning April 1, 2000, with an Engineering Report in form and substance
     satisfactory to the Agent prepared by an independent petroleum engineering
     acceptable to Agent covering the Oil and Gas Properties utilizing economic
     and pricing parameters used by Agent as established from time to time,
     together with such other information concerning the value of the Oil and
     Gas Properties as the Agent shall deem necessary to determine the value of
     the Oil and Gas Properties.  By  October 1 of each year, or within thirty
     (30) days after either (i) receipt of notice from Agent that the Banks
     require an Unscheduled Redetermination, or (ii) the Borrower give notice to
     Agent of their desire to have an Unscheduled Redetermination performed, the
     Borrower shall furnish to the Banks an engineering report in form and
     substance satisfactory to Agent prepared by Borrower's in-house engineering
     staff valuing the Oil and Gas Properties utilizing economic and pricing
     parameters used by the Agent as established from time to time, together
     with such other information, reports and data concerning the value of the
     Oil and Gas Properties as Agent shall deem reasonably necessary to
     determine the value of such Oil and Gas Properties.  Agent shall by notice
     to the Borrower no later than May 1 and November 1 of each year, or within
     a reasonable time thereafter (herein called the "Determination Date"),
     notify the Borrower of the designation by the Banks of the new Borrowing
     Base and Monthly Commitment Reduction for the period beginning on such
     Determination Date and continuing until, but not including, the next
     Determination Date.  If an Unscheduled Redetermination is made by the
     Banks, the Agent shall notify the Borrower within thirty (30) days after
     receipt of all requested information, or within a reasonable time
     thereafter, of the new Borrowing Base and Monthly Commitment Reduction, and
     such new Borrowing Base and Monthly Commitment Reduction shall continue
     until the next Determination Date.  If the Borrower does not furnish all
     such information, reports and data by any date specified in this Section
     7(b), unless such failure is of no fault of the Borrower, the Banks may
     nonetheless designate the Borrowing Base and Monthly Commitment Reduction
     at any amounts which the Banks in their discretion determine and may
     redesignate the Borrowing Base and Monthly Commitment Reduction from time
     to time thereafter until the Banks receive all such information, reports
     and data, whereupon the Banks shall designate a new Borrowing Base and
     Monthly Commitment Reduction as described above.  Each Bank shall determine
     the amount of the Borrowing Base and Monthly Commitment Reduction based
     upon the loan collateral value which such Bank in its discretion (using
     such methodology, assumptions and discounts rates as such

                                      -22-
<PAGE>

     Bank customarily uses in assigning collateral value to oil and gas
     properties, oil and gas gathering systems, gas processing and plant
     operations) assigns to such Oil and Gas Properties of the Borrower at the
     time in question and based upon such other credit factors consistently
     applied (including, without limitation, the assets, liabilities, cash flow,
     business, properties, prospects, management and ownership of the Borrower
     and their affiliates) as such Bank customarily considers in evaluating
     similar oil and gas credits, but such Bank in its discretion shall not be
     required to give any additional positive value to any Oil and Gas Property
     over the current economic and pricing parameters used by such Bank for such
     Determination Date which additional value is derived directly from a
     hedging, forward sale or swap agreement covering such Oil and Gas Property
     as of the date of such determination. All determinations or Unscheduled
     Redeterminations of the Borrowing Base and the Monthly Commitment Reduction
     resulting in an increase in the Borrowing Base or a decrease in the Monthly
     Commitment Reduction shall require the approval of 100% of the Banks. All
     other determinations shall require only Majority Banks. If the Banks cannot
     otherwise agree on the Borrowing Base or the Monthly Commitment Reduction,
     each Bank shall submit in writing to the Agent its proposed Borrowing Base
     and Monthly Commitment Reduction and the Borrowing Base and Monthly
     Commitment Reduction shall be set at the arithmetic average of the
     Borrowing Base and the Monthly Commitment Reduction proposed by the Banks.
     If at any time any of the Oil and Gas Properties are sold, the Borrowing
     Base then in effect shall automatically be reduced by a sum equal to the
     amount of prepayment required to be made pursuant to Section 12(r) hereof.
     The Borrowing Base shall be additionally reduced from time to time pursuant
     to the provisions of Sections 2(e) and 2(f) hereof. It is expressly
     understood that the Banks have no obligation to designate the Borrowing
     Base or the Monthly Commitment Reduction at any particular amounts, except
     in the exercise of their discretion, whether in relation to the Revolving
     Commitment or otherwise. Provided, however, that the Banks shall not have
     the obligation to designate a Borrowing Base in an amount in excess of the
     Revolving Commitment or its legal or internal lending limits.

     8.   Fees.

          (a) Unused Commitment Fee.  The Borrower shall pay to Agent for the
              ---------------------
     ratable benefit of the Banks an unused commitment fee (the "Unused
     Commitment Fee") equivalent to one-half of one percent (.50%) per annum on
     the daily average of the unadvanced amount of the Revolving Loan
     Commitment.  The Unused Commitment Fee shall be payable in arrears on the
     last Business Day of each calendar quarter beginning June 30, 1999 with the
     final fee payment due on the Maturity Date for any period then ending for
     which the Unused Commitment Fee shall not have been theretofore paid.  In
     the event the Revolving Commitment terminates on any date prior to the end
     of any such monthly period, the Borrower shall pay to the Agent for the
     ratable benefit of the Banks, on the date of such termination, the total
     Unused Commitment Fee due on such Commitment for the period in which such
     termination occurs.

                                      -23-
<PAGE>

          (b) The Letter of Credit Fee.  Borrower shall pay to the Agent the
              ------------------------
     Letter of Credit fees required above in Section 2(d).

          (c) Agency Fees.  The Borrower shall pay to the Agent certain fees
              -----------
     for acting as Agent hereunder in amounts to be negotiated between the
     Borrower and the Agent.

          (d) Origination Fee.   The Borrower shall pay to the Agent on the
              ---------------
     Effective Date a one-time Origination Fee equal to $236,000.  The Borrower
     has heretofore paid the Agent a non-refundable due diligence fee of
     $50,000, which fee shall be credited against the amount owed as an
     Origination Fee on the Effective Date.

     9.   Prepayments.

          (a) Voluntary Prepayments.  Subject to the provisions of Section 5(e)
              ---------------------
     hereof, the Borrower may at any time and from time to time, without penalty
     or premium, prepay the Notes, in whole or in part.  Each such prepayment
     shall be made on at least three (3) Eurodollar Business Days' notice to
     Agent in the case of Eurodollar Loan Tranches and without notice in the
     case of Prime Rate Loan Tranches and shall be in a minimum amount of
     $500,000 or an integral multiple of $100,000 in excess thereof or the
     unpaid balance on the Notes, whichever is less, plus accrued interest
     thereon to the date of prepayment.

          (b) Mandatory Prepayment For Borrowing Base Deficiency.  In the event
              --------------------------------------------------
     the Total Outstandings ever exceed the Borrowing Base as determined by
     Banks pursuant to Section 7(b) hereof, the Borrower shall, within thirty
     (30) days after notification from the Agent, either (A) by instruments
     reasonably satisfactory in form and substance to the Bank, provide the
     Agent with collateral with value and quality in amounts satisfactory to all
     of the Banks in their discretion in order to increase the Borrowing Base by
     an amount at least equal to such excess, or (B) prepay, without premium or
     penalty, the principal amount of the Revolving Notes in an amount at least
     equal to such excess plus accrued interest thereon to the date of
     prepayment.  If the Total Outstandings ever exceed the Revolving Commitment
     as a result of a Monthly Commitment Reduction or any other required
     reduction in the Revolving Commitment, then in such event, Borrower shall
     immediately prepay the principal amount of the Revolving Notes in an amount
     at least equal to such excess plus accrued interest to the date of
     prepayment.

     10.  Representations and Warranties.  In order to induce the Banks to enter
into this Agreement, the Borrower hereby, jointly and severally, represent and
warrant to the Banks (which representations and warranties will survive the
delivery of the Notes) that:

          (a) Creation and Existence.  Each of Borrower and its Subsidiaries is
              ----------------------
     a Person duly organized, validly existing and in good standing under the
     laws of the jurisdiction in which it was formed and is duly qualified in
     all jurisdictions wherein failure to qualify may

                                      -24-
<PAGE>

     result in a Material Adverse Effect. Each of Borrower and its Subsidiaries
     has all power and authority to own its properties and assets and to
     transact the business in which it is engaged.

          (b) Power and Authority.  Borrower is duly authorized and empowered
              -------------------
     to create and issue the Notes; and Borrower and each of its Subsidiaries is
     duly authorized and empowered to execute, deliver and perform the Loan
     Documents, including this Agreement to which they are a party; and all
     corporation action on Borrower's part requisite for the due creation and
     issuance of the Notes and on the part of Borrower and each Subsidiary for
     the due execution, delivery and performance of the Loan Documents,
     including this Agreement, has been duly and effectively taken.

          (c) Binding Obligations.  This Agreement does, and the Notes and
              -------------------
     other Loan Documents upon their creation, issuance, execution and delivery
     will, constitute valid and binding obligations of Borrower and each
     Subsidiary party thereto, enforceable in accordance with its respective
     terms (except that enforcement may be subject to general principals of
     equity or to any applicable bankruptcy, insolvency, or similar debtor
     relief laws now or hereafter in effect and relating to or affecting the
     enforcement of creditors' rights generally).

          (d) No Legal Bar or Resultant Lien.  The Notes and the Loan
              ------------------------------
     Documents, including this Agreement, do not and will not, to the best of
     Borrower's knowledge violate any provisions of any contract, agreement,
     law, regulation, order, injunction, judgment, decree or writ to which
     Borrower or any of its Subsidiaries is subject, or result in the creation
     or imposition of any lien or other encumbrance upon any assets or
     properties of Borrower or any of its Subsidiaries, other than those
     contemplated by this Agreement.

          (e) No Consent.  The execution, delivery and performance by Borrower
              ----------
     and its Subsidiaries of the Loan Documents, including this Agreement, does
     not require the consent or approval of any other person or entity,
     including without limitation any regulatory authority or governmental body
     of the United States or any state thereof or any political subdivision of
     the United States or any state thereof except for consents required for
     federal, state and, in some instances, private leases, right of ways and
     other conveyances or encumbrances of oil and gas leases.

          (f) Financial Condition.  The audited Financial Statements of
              -------------------
     Borrower dated December 31, 1998, which have been delivered to Banks are
     complete and correct in all material respects, and fully and accurately
     reflect in all material respects the financial condition and results of the
     operations of the Borrower as of the date or dates and for the period or
     periods stated.  No change has since occurred in the condition, financial
     or otherwise, of the Borrower or any of its Subsidiaries which is
     reasonably expected to have a Material Adverse Effect, except as disclosed
     to the Banks in Schedule "2" attached hereto.

                                      -25-
<PAGE>

          (g) Liabilities.  Neither Borrower nor any Subsidiaries has any
              -----------
     material (individually or in the aggregate) liability, direct or
     contingent, except as disclosed to the Banks in the Financial Statements,
     in writing from time to time or on Schedule "3" attached hereto.  No
     unusual or unduly burdensome restrictions, restraint, or hazard exists by
     contract, law or governmental regulation or otherwise relative to the
     business, assets or properties of Borrower or any Subsidiary which is
     reasonably expected to have a Material Adverse Effect.

          (h) Litigation.  Except as described in the Financial Statements, in
              ----------
     writing from time to time or as otherwise disclosed to the Banks in
     Schedule "4" attached hereto, there is no litigation, legal or
     administrative proceeding, investigation or other action of any nature
     pending or, to the knowledge of the officers of Borrower threatened against
     or affecting Borrower or any Subsidiary which involves the possibility of
     any judgment or liability not fully covered by insurance, and which is
     reasonably expected to have a Material Adverse Effect.

          (i) Taxes; Governmental Charges.  Each of Borrower and its
              ---------------------------
     Subsidiaries has filed all tax returns and reports required to be filed and
     has paid all taxes, assessments, fees and other governmental charges levied
     upon it or its assets, properties or income which are due and payable,
     including interest and penalties, the failure of which to pay could
     reasonably be expected to have a Material Adverse Effect, except such as
     are being contested in good faith by appropriate proceedings and for which
     adequate reserves for the payment thereof as required by GAAP has been
     provided and levy and execution thereon have been stayed and continue to be
     stayed.

          (j) Titles, Etc.  Each of Borrower and its Subsidiaries has good and
              ------------
     defensible title to all of its respective assets, including without
     limitation, the Oil and Gas Properties (excluding from this representation
     any undeveloped acreage for which no value is assigned by the Banks), free
     and clear of all liens or other encumbrances except Permitted Liens.

          (k) Defaults.  Neither Borrower nor any Subsidiary is in default and
              --------
     no event or circumstance has occurred which, but for the passage of time or
     the giving of notice, or both, would constitute a default under any loan or
     credit agreement, indenture, mortgage, deed of trust, security agreement or
     other agreement or instrument to which Borrower or any Subsidiary is a
     party in any respect that would be reasonably expected to have a Material
     Adverse Effect except for a current default under that certain Credit
     Agreement among Borrower, the Lenders and NationsBank of Texas, N.A., as
     Agent, dated as of December 23, 1997, as amended.  No Event of Default
     hereunder has occurred and is continuing.

          (l) Casualties; Taking of Properties.  Since the dates of the latest
              --------------------------------
     Financial Statements of the Borrower delivered to Banks, neither the
     business nor the assets or properties of Borrower or any Subsidiary have
     been affected (to the extent it is reasonably likely to cause a Material
     Adverse Effect), as a result of any fire, explosion, earthquake, flood,
     drought, windstorm, accident, strike or other labor disturbance, embargo,
     requisition

                                      -26-
<PAGE>

     or taking of property or cancellation of contracts, permits or concessions
     by any domestic or foreign government or any agency thereof, riot,
     activities of armed forces or acts of God or of any public enemy.

          (m) Use of Proceeds; Margin Stock.  The proceeds of the Revolving
              -----------------------------
     Commitment may be used to (i) refinance existing bank debt, (ii) for the
     acquisition and development of oil and gas properties, (iii) Letters of
     Credit, and (iv) general corporate purposes.  Neither Borrower nor any
     Subsidiary is engaged principally or as one of its important activities in
     the business of extending credit for the purpose of purchasing or carrying
     any "margin stock " as defined in Regulation U of the Board of Governors of
     the Federal Reserve System (12 C.F.R. Part 221), or for the purpose of
     reducing or retiring any indebtedness which was originally incurred to
     purchase or carry a margin stock or for any other purpose which might
     constitute this transaction a "purpose credit" within the meaning of said
     Regulation U.

          Neither Borrower, any Subsidiary nor any person or entity acting on
     behalf of Borrower or any Subsidiary has taken or will take any action
     which might cause the loans hereunder or any of the Loan Documents,
     including this Agreement, to violate Regulation U or any other regulation
     of the Board of Governors of the Federal Reserve System or to violate the
     Securities Exchange Act of 1934 or any rule or regulation thereunder, in
     each case as now in effect or as the same may hereafter be in effect.

          (n) Location of Business and Offices.  The principal place of
              --------------------------------
     business and chief executive offices of the Borrower is located at the
     address stated in Section 17 hereof.

          (o) Compliance with the Law.  To the best of Borrower's knowledge,
              -----------------------
     neither Borrower nor any Subsidiary:

              (i)    is in violation of any law, judgment, decree, order,
          ordinance, or governmental rule or regulation to which Borrower, any
          Subsidiary, or any of their respective assets or properties are
          subject; or

              (ii)   has failed to obtain any license, permit, franchise or
                     other governmental authorization necessary to the ownership
                     of any of its assets or properties or the conduct of its
                     business;

     which violation or failure is reasonably expected to have a Material
     Adverse Effect.

          (p) No Material Misstatements.  No information, exhibit or report
              -------------------------
     furnished by Borrower or any Subsidiary to the Banks in connection with the
     negotiation of this Agreement or in the preparation of the offering memo
     contained any material misstatement of fact or omitted to state a material
     fact or any fact necessary to make the statement contained therein not
     materially misleading.

                                      -27-
<PAGE>

          (q) Not A Utility.  Neither Borrower nor any Subsidiary is an entity
              -------------
     engaged in the State of Texas in the (i) generation, transmission, or
     distribution and sale of electric power; (ii) transportation, distribution
     and sale through a local distribution system of natural or other gas for
     domestic, commercial, industrial, or other use; (iii) provision of
     telephone or telegraph service to others; (iv) production, transmission, or
     distribution and sale of steam or water; (v) operation of a railroad; or
     (vii) provision of sewer service to others.

          (r) ERISA.  Borrower and its Subsidiaries are in compliance in all
              -----
     material respects with the applicable provisions of ERISA, and no
     "reportable event", as such term is defined in Section 4043 of ERISA,
     (other than "reportable events" for which the Pension Benefit Guaranty
     Corporation has waived its rights to receive notice thereof within thirty
     (30) days) has occurred with respect to any Plan of Borrower.

          (s) Public Utility Holding Company Act.  Neither Borrower nor any
              ----------------------------------
     Subsidiary is a "holding company", or "subsidiary company" of a "holding
     company", or an "affiliate" of a "holding company" or of a"subsidiary
     company" of a "holding company", or a "public utility" within the meaning
     of the Public Utility Holding Company Act of 1935, as amended.

          (t) Subsidiaries.  All of the Borrower's Subsidiaries are listed on
              ------------
     Schedule "5" hereto.

          (u) Environmental Matters.  Except as disclosed on Schedule "6",
              ---------------------
     neither Borrower nor any Subsidiary (i) has received notice or otherwise
     learned of any Environmental Liability which would be reasonably likely to
     individually or in the aggregate have a Material Adverse Effect arising in
     connection with (A) any non-compliance with or violation of the
     requirements of any Environmental Law or (B) the release or threatened
     release of any toxic or hazardous waste into the environment, (ii) has
     received notice of any threatened or actual liability in connection with
     the release or notice of any threatened release of any toxic or hazardous
     waste into the environment which would be reasonably likely to individually
     or in the aggregate have a Material Adverse Effect or (iii) has received
     notice or otherwise learned of any federal or state investigation
     evaluating whether any remedial action is needed to respond to a release or
     threatened release of any toxic or hazardous waste into the environment for
     which Borrower or any Subsidiary is or may be liable which may reasonably
     be expected to result in a Material Adverse Effect.

          (v) Liens.  Except (i) as disclosed on Schedule "1" hereto and (ii)
              -----
     for Permitted Liens, the assets and properties of the Borrower and each
     Subsidiary is free and clear of all liens and encumbrances.

          (w) Year 2000 Compliance. Borrower represents and warrants to Banks
              --------------------
     that:

              (i)    It and its Subsidiaries will use their best efforts to
          cause all devices, systems, machinery, information technology,
          computer software and

                                      -28-
<PAGE>

          hardware, and other date sensitive technology (jointly and severally
          the "Systems") necessary for Borrower and its Subsidiaries carry on
          its respective business as presently conducted and as contemplated to
          be conducted in the future to be Year 2000 Compliant within a period
          of time calculated to result in no material disruption of any of
          Borrower's or any of its Subsidiary's business operations. For
          purposes of these provisions, "Year 2000 Compliant" means that such
          Systems are designed to be used prior to, during and after the
          Gregorian calendar year 2000 A.D. and will operate during each such
          time period without error relating to date data, specifically
          including any error relating to, or the product of, date data which
          represents or references different centuries or more than one century.

              (ii)   Borrower and each Subsidiary has: (A) undertaken, or will
          undertake, an inventory, review, and assessment of all areas within
          its business and operations that could be adversely affected by the
          failure of Borrower or any Subsidiary to be Year 2000 Compliant on a
          timely basis; (B) developed, or will develop,  a plan and time line
          for becoming Year 2000 Compliant on a timely basis; (C) to date,
          implemented, or will implement, that plan in accordance with that
          timetable in all material respects on a best-efforts basis.

              (iii)  Borrower and each Subsidiary has either made, or will
          make, written inquiry of each of its vendors, and have obtained, or
          will obtain, in writing confirmations from all such persons, as to
          whether such persons have initiated programs to become Year 2000
          Compliant and on the basis of such confirmations.  Borrower and each
          Subsidiary reasonably believe that all such persons will be or become
          so compliant.  For purposes hereof, "vendors" refers to those vendors
          of Borrower and each Subsidiary whose business failure would, with
          reasonable probability, result in a material adverse change in the
          business, properties, condition (financial or otherwise), or prospects
          of Borrower or any Subsidiary.  For purposes of this paragraph, Bank,
          as a lender of funds under the terms of this Agreement, confirms to
          Borrower that Bank has initiated its own corporate-wide Year 2000
          program with respect to its lending activities.

              (iv)   The fair market value of all Collateral pledged to Banks to
          secure the Loan and the Notes and all of Borrower's obligations
          hereunder are not and shall not be less than currently anticipated or
          subject to deterioration in value because of the failure of such
          Collateral to be Year 2000 Compliant.

                                      -29-
<PAGE>

     11.  Conditions of Lending.

          (a) The effectiveness of this Agreement, and the obligation to make
     the initial Advance or issue any initial Letter of Credit under the
     Revolving Commitment shall be subject to satisfaction of the following
     conditions precedent:

              (i)    Execution and Delivery.  The (A) Borrower shall have
                     ----------------------
          executed and delivered the Agreement and other required documents, and
          (B) each Initial Subsidiary Guarantor shall have executed a Subsidiary
          Guaranty, all in form and substance satisfactory to the Agent;

              (ii)   Legal Opinion.  The Agent shall have received from Thompson
                     -------------
          & Knight, P.C., counsel to Borrower and each Initial Subsidiary
          Guarantor, a favorable legal opinion in form and substance
          satisfactory to it (A) as to the matters set forth in Subsections
          10(a), (b), (c), (d), (e) and (h) hereof, and (B) as to such other
          matters as Agent or its counsel may reasonably request;

              (iii)  Corporate Resolutions.  The Agent shall have received
                     ---------------------
          appropriate certified corporate resolutions of Borrower and each
          Initial Subsidiary Guarantor;

              (iv)   Good Standing.  The Agent shall have received evidence of
                     -------------
          existence and good standing for Borrower and each Initial Subsidiary
          Guarantor;

              (v)    Incumbency.  The Agent shall have received a signed
                     ----------
          certificate of Borrower and each Initial Subsidiary Guarantor,
          certifying the names of the officers of Borrower and each Initial
          Subsidiary Guarantor authorized to sign loan documents on behalf of
          Borrower, together with the true signatures of each officer.  The
          Agent may conclusively rely on such certificate until the Agent
          receives a further certificate of Borrower or any Initial Subsidiary
          Guarantor canceling or amending the prior certificate and submitting
          signatures of the officers named in such further certificate;

              (vi)   Articles of Incorporation and Bylaws.  The Agent shall have
                     ------------------------------------
          received copies of the Articles of Incorporation of Borrower and each
          Initial Subsidiary Guarantor and all amendments thereto, certified by
          the Secretary of State of the State of its incorporation, and a copy
          of the bylaws of Borrower and each Initial Subsidiary Guarantor and
          all amendments thereto, certified by Borrower and each Initial
          Subsidiary Guarantor as being true, correct and complete;

              (vii)  Evidence of Ability to Pay. The Agent shall have received
                     --------------------------
          satisfactory evidence of the availability of adequate funds to pay the
          semi-annual interest payment due on the Subordinate Notes on May 15,
          1999;

                                      -30-
<PAGE>

              (viii) Assignment of Notes and Liens.  The Agent shall have
                     -----------------------------
          received an assignment of rights, obligations and Liens currently held
          by Arnos Corp. and satisfactory evidence that all obligations owed
          Arnos Corp. are assigned to the Agent;

              (ix)   Payment of Fees. The Agent and the Banks shall have
                     ---------------
          received payment of all fees due hereunder;

              (x)    Designated Senior Indebtedness.   The Agent shall have
                     ------------------------------
          received satisfactory evidence that the Borrower has delivered written
          notice to the Trustee under the Subordinate Note Indenture, specifying
          that Borrower has entered into this Agreement and the obligation due
          under this Agreement constitutes "Designated Senior Indebtedness" as
          defined in the Indenture;

              (xi)   Closing.  The transaction described in this Agreement shall
                     -------
          have closed on or before May 31, 1999;

              (xii)  Representation and Warranties.  The representations and
                     -----------------------------
          warranties of Borrower under this Agreement are true and correct in
          all material respects as of such date, as if then made (except to the
          extent that such representations and warranties related solely to an
          earlier date);

              (xiii) No Event of Default.  No Event of Default shall have
                     -------------------
          occurred and be continuing nor shall any event have occurred or failed
          to occur which, with the passage of time or service of notice, or
          both, would constitute an Event of Default;

              (xiv)  Other Documents.  Agent shall have received such other
                     ---------------
          instruments and documents incidental and appropriate to the
          transaction provided for herein as Agent or its counsel may reasonably
          request, and all such documents shall be in form and substance
          reasonably satisfactory to the Agent; and

              (xv)   Legal Matters Satisfactory.  All legal matters incident to
                     --------------------------
          the consummation of the transactions contemplated hereby shall be
          reasonably satisfactory to special counsel for Agent retained at the
          expense of the Borrower.

          (b) The obligation of the Banks to make any Advance or issue any
     Letter of Credit under the Revolving Commitment (including the initial
     Advance) shall be subject to the following additional conditions precedent
     that, at the date of making each such Advance and after giving effect
     thereto:

              (i)    Representation and Warranties.  The representations and
                     -----------------------------
          warranties of Borrower under this Agreement are true and correct in
          all material respects as of

                                      -31-
<PAGE>

          such date, as if then made (except to the extent that such
          representations and warranties related solely to an earlier date);

              (ii)   No Event of Default.  No Event of Default shall have
                     -------------------
          occurred and be continuing nor shall any event have occurred or failed
          to occur which, with the passage of time or service of notice, or
          both, would constitute an Event of Default;

              (iii)  Other Documents.  Agent shall have received such other
                     ---------------
          instruments and documents incidental and appropriate to the
          transaction provided for herein as Agent or its counsel may reasonably
          request, and all such documents shall be in form and substance
          reasonably satisfactory to the Agent; and

              (iv)   Legal Matters Satisfactory.  All legal matters incident to
                     --------------------------
          the consummation of the transactions contemplated hereby shall be
          reasonably satisfactory to special counsel for Agent retained at the
          expense of the Borrower.

     12.  Affirmative Covenants.  A deviation from the provisions of this
Section 12 shall not constitute an Event of Default under this Agreement if such
deviation is consented to in writing by the required percentage of the Banks
prior to the date of deviation.  The Borrower will at all times comply, and
cause each of its Subsidiaries to comply, with the covenants contained in this
Section 12 from the date hereof and for so long as the Commitment is in
existence or any amount is owed to the Agent or the Banks under this Agreement
or the other Loan Documents.

          (a) Financial Statements and Reports.  Borrower shall promptly
              --------------------------------
     furnish to the Agent from time to time upon request such information
     regarding the business and affairs and financial condition of Borrower, as
     the Agent may reasonably request, and will furnish to the Agent:

              (i)    Annual Audited Financial Statements.  As soon as available,
                     -----------------------------------
          and in any event within ninety (90) days after the close of each
          fiscal year beginning with the fiscal year ended December 31, 1998,
          the annual audited consolidated and consolidating Financial Statements
          of Borrower, prepared in accordance with GAAP accompanied by an
          unqualified opinion rendered by an independent accounting firm
          reasonably acceptable to the Agent;

              (ii)   Quarterly Financial Statements.  As soon as available, and
                     ------------------------------
          in any event within forty-five (45) days after the end of each
          calendar quarter of each year including the last calendar quarter of
          any fiscal year, beginning with the fiscal quarter ended March 31,
          1999, the quarterly unaudited consolidated and consolidating Financial
          Statements of Borrower prepared in accordance with GAAP;

              (iii)  Report on Properties.  As soon as available and in any
                     --------------------
          event on or before April 1 and October 1 of each calendar year, and at
          such other times as any

                                      -32-
<PAGE>

          Bank, in accordance with Section 7 hereof, may request, the
          engineering reports required to be furnished to the Agent under such
          Section 7 on the Oil and Gas Properties;

              (iv)   Monthly Production Reports.  Within sixty (60) days after
                     --------------------------
          the end of each month, a monthly report, in form and substance
          satisfactory to the Agent, indicating the month's sales volume, sales
          revenues, production taxes, operating expense and net operating income
          from the Oil and Gas Properties, with detailed calculations and
          worksheets, all in form and substance satisfactory to Agent;

              (v)    Additional Information.  Promptly upon request of the Agent
                     ----------------------
          from time to time any additional financial information or other
          information that the Agent may reasonably request.

     All such reports, information, balance sheets and Financial Statements
     referred to in Subsection 12(a) above shall be in such detail as the Agent
     may reasonably request and shall be prepared in a manner consistent with
     the Financial Statements.

          (b) Certificates of Compliance.  Concurrently with the furnishing of
              --------------------------
     the annual audited Financial Statements pursuant to Subsection 12(a)(i)
     hereof and the quarterly unaudited Financial Statements pursuant to
     Subsection 12(a)(ii) hereof for the months coinciding with the end of each
     calendar quarter, Borrower will furnish or cause to be furnished to the
     Agent a certificate in the form of Exhibit "D" attached hereto, signed by
     the President or Chief Financial Officer of Borrower, (i) stating that
     Borrower has fulfilled in all material respects its obligations under the
     Notes and the Loan Documents, including this Agreement, and that all
     representations and warranties made herein and therein continue (except to
     the extent they relate solely to an earlier date) to be true and correct in
     all material respects (or specifying the nature of any change), or if a
     Default has occurred, specifying the Default and the nature and status
     thereof; (ii) to the extent requested from time to time by the Agent,
     specifically affirming compliance of Borrower in all material respects with
     any of its representations (except to the extent they relate solely to an
     earlier date) or obligations under said instruments; (iii) setting forth
     the computation, in reasonable detail as of the end of each period covered
     by such certificate, of compliance with Sections 13(b), (c) and (d); and
     (iv) containing or accompanied by such financial or other details,
     information and material as the Agent may reasonably request to evidence
     such compliance.

          (c) Accountants' Certificate.  Concurrently with the furnishing of
              ------------------------
     the annual audited Financial Statement pursuant to Section 12(a)(i) hereof,
     Borrower will furnish a statement from the firm of independent public
     accountants which prepared such Financial Statement to the effect that
     nothing has come to their attention (except as specified in such
     certificate) to cause them to believe that there existed on the date of
     such statements any Event of Default and specifically calculating
     Borrower's compliance with Sections 13(b), (c) and (d) of this Agreement.

                                      -33-
<PAGE>

          (d)  Taxes and Other Liens.  The Borrower will pay and discharge, and
               ---------------------
     will cause each Subsidiary to pay and discharge, promptly all taxes,
     assessments and governmental charges or levies imposed upon it or upon its
     income or any of its assets or property as well as all claims of any kind
     (including claims for labor, materials, supplies and rent) which, if
     unpaid, might become a Lien or other encumbrance upon any or all of its
     assets or property and which could reasonably be expected to result in a
     Material Adverse Effect; provided, however, that neither Borrower nor any
     of its Subsidiaries shall be required to pay any such tax, assessment,
     charge, levy or claim if the amount, applicability or validity thereof
     shall currently be contested in good faith by appropriate proceedings
     diligently conducted, levy and execution thereon have been stayed and
     continue to be stayed and if it shall have set up adequate reserves
     therefor, if required, under GAAP.

          (e)  Compliance with Laws.  Borrower will observe and comply, and will
               --------------------
     cause each Subsidiary to observe and comply, in all material respects, with
     all applicable laws, statutes, codes, acts, ordinances, orders, judgments,
     decrees, injunctions, rules, regulations, orders and restrictions relating
     to environmental standards or controls or to energy regulations of all
     federal, state, county, municipal and other governments, departments,
     commissions, boards, agencies, courts, authorities, officials and officers,
     domestic or foreign.

          (f)  Further Assurances.  The Borrower will, and will cause each
               ------------------
     Subsidiary to, cure promptly any defects in the creation and issuance of
     the Notes and the execution and delivery of the Notes and the Loan
     Documents, including this Agreement.  The Borrower at its sole expense
     will, and will cause each Subsidiary to, promptly execute and deliver to
     Agent upon its reasonable request all such other and further documents,
     agreements and instruments in compliance with or accomplishment of the
     covenants and agreements in this Agreement, or to correct any omissions in
     the Notes or more fully to state the obligations set out herein.

          (g)  Performance of Obligations.  The Borrower will pay the Notes and
               --------------------------
     other obligations incurred by it hereunder according to the reading, tenor
     and effect thereof and hereof; and Borrower will, and will cause each
     Subsidiary to, do and perform every act and discharge all of the
     obligations provided to be performed and discharged by the Borrower under
     the Loan Documents, including this Agreement, at the time or times and in
     the manner specified.

          (h)  Insurance.  The Borrower and each Subsidiary now maintains and
               ---------
     Borrower will, and will cause each Subsidiary to, continue to maintain
     insurance with financially sound and reputable insurers with respect to its
     assets against such liabilities, fires, casualties, risks and contingencies
     and in such types and amounts as is customary in the case of persons
     engaged in the same or similar businesses and similarly situated.  Upon
     request of the Agent, the Borrower will furnish or cause to be furnished to
     the Agent from time to time a summary of the respective insurance coverage
     of Borrower and each Subsidiary in form and substance satisfactory to the
     Agent, and, if requested, will furnish the Agent copies of the applicable

                                      -34-
<PAGE>

     policies.  Upon demand by Agent any insurance policies covering any such
     property shall be endorsed (i) to provide that such policies may not be
     canceled, reduced or affected in any manner for any reason without fifteen
     (15) days prior notice to Agent, (ii) to provide for insurance against
     fire, casualty and other hazards normally insured against, in the amount of
     the full value (less a reasonable deductible not to exceed amounts
     customary in the industry for similarly situated business and properties)
     of the property insured, and (iii) to provide for such other matters as the
     Agent may reasonably require.  The Borrower shall, and shall cause each
     Subsidiary to, at all times maintain adequate insurance with respect to all
     of their assets, including but not limited to, the Oil and Gas Properties
     or any collateral against its liability for injury to persons or property,
     which insurance shall be by financially sound and reputable insurers and
     shall without limitation provide the following coverages:  comprehensive
     general liability (including coverage for damage to underground resources
     and equipment, damage caused by blowouts or cratering, damage caused by
     explosion, damage to underground minerals or resources caused by saline
     substances, broad form property damage coverage, broad form coverage for
     contractually assumed liabilities and broad form coverage for acts of
     independent contractors), worker's compensation and automobile liability.
     The Borrower shall, and shall cause each Subsidiary to, at all times
     maintain cost of control of well insurance with respect to the Oil and Gas
     Properties which shall insure it against seepage and pollution expense;
     redrilling expense; and cost of control of well; fires, blowouts, etc., if
     deemed economical in the reasonable discretion of the Borrower.
     Additionally, the Borrower and each Subsidiary shall at all times maintain
     adequate insurance with respect to all of its other assets and wells in
     accordance with prudent business practices.

          (i)  Accounts and Records.  Borrower will, and will cause each
               --------------------
     Subsidiary to, keep books, records and accounts in which full, true and
     correct entries will be made of all dealings or transactions in relation to
     its business and activities, prepared in a manner consistent with prior
     years, subject to changes suggested by its auditors.

          (j)  Right of Inspection.  Borrower will, and will cause each
               -------------------
     Subsidiary to, permit any officer, employee or agent of the Banks to
     examine its books, records and accounts, and take copies and extracts
     therefrom, all at such reasonable times during normal business hours and as
     often as the Banks may reasonably request.  The Banks will use best efforts
     to keep all  Confidential Information (as herein defined) confidential and
     will not disclose or reveal the Confidential Information or any part
     thereof other than (i) as required by law, and (ii) to the Banks', and the
     Banks' subsidiaries', Affiliates, officers, employees, legal counsel and
     regulatory authorities (including the National Association of Insurance
     Commissioners) or advisors to whom it is necessary to reveal such
     information for the purpose of effectuating the agreements and undertakings
     specified herein or as otherwise required in connection with the
     enforcement of the Banks' and the Agent's rights and remedies under the
     Notes, this Agreement and the other Loan Documents.  As used herein,
     "Confidential Information" means information about the Borrower or its
     Subsidiaries furnished by the Borrower or its Subsidiaries to the Banks,
     but does not include information (i) which was publicly known,

                                      -35-
<PAGE>

     or otherwise known to the Banks, at the time of the disclosure, (ii) which
     subsequently becomes publicly known through no act or omission by the
     Banks, or (iii) which otherwise becomes known to the Banks, other than
     through disclosure by the Borrower or its Subsidiaries.

          (k)  Notice of Certain Events. The Borrower shall, and shall cause
               ------------------------
     each Subsidiary to, promptly notify the Agent if it learns of the
     occurrence of (i) any event which constitutes an Event of  Default together
     with a detailed statement of the steps being taken to cure such Event of
     Default; (ii) any legal, judicial or regulatory proceedings affecting
     Borrower's or its Subsidiaries' assets or properties which, if adversely
     determined, could reasonably be expected to have a Material Adverse Effect;
     (iii) any dispute between it and any governmental or regulatory body or any
     other Person or entity which, if adversely determined, might reasonably be
     expected to cause a Material Adverse Effect; or (iv) any other matter which
     in its reasonable opinion could have a Material Adverse Effect.

          (l)  ERISA Information and Compliance.  The Borrower will, and will
               --------------------------------
     cause each Subsidiary to, promptly furnish to the Agent immediately upon
     becoming aware of the occurrence of any "reportable event", as such term is
     defined in Section 4043 of ERISA (other than "reportable events" for which
     the Pension Benefit Guaranty Corporation has waived its rights to receive
     notice thereof within thirty (30) days), or of any "prohibited
     transaction", as such term is defined in Section 4975 of the Internal
     Revenue Code of 1986, as amended, in connection with any Plan or any trust
     created thereunder, a written notice signed by the chief financial officer
     of Borrower or the affected Subsidiary specifying the nature thereof, what
     action Borrower or the affected Subsidiary  is taking or proposes to take
     with respect thereto, and, when known, any action taken by the Internal
     Revenue Service with respect thereto.

          (m)  Environmental Reports and Notices.  The Borrower will, and will
               ---------------------------------
     cause each Subsidiary to, deliver to the Agent (i) promptly upon its
     becoming available, one copy of each report sent by Borrower or such
     Subsidiary to any court, governmental agency or instrumentality pursuant to
     any Environmental Law, (ii) notice, in writing, promptly upon Borrower's or
     such Subsidiary's receipt of notice or otherwise learning of any claim,
     demand, action, event, condition, report or investigation indicating any
     potential or actual liability arising in connection with (x) the non-
     compliance with or violation of the requirements of any Environmental Law
     which reasonably could be expected to have a Material Adverse Effect; (y)
     the release or threatened release of any toxic or hazardous waste into the
     environment which reasonably could be expected to have a Material Adverse
     Effect or which release Borrower or such Subsidiary would have a duty to
     report to any court or government agency or instrumentality, or (iii) the
     existence of any Environmental Lien on any properties or assets of Borrower
     or such Subsidiary, and Borrower shall, and shall cause such Subsidiary to,
     immediately deliver a copy of any such notice to Agent.

                                      -36-
<PAGE>

          (n)  Compliance and Maintenance.  The Borrower will, and will cause
               --------------------------
     each Subsidiary to (i) observe and comply in all material respects with all
     Environmental Laws; (ii) except as provided in Subsections 12(o), 12(p) and
     12(q) below, maintain the Oil and Gas Properties and other assets and
     properties in good and workable condition at all times and make all
     repairs, replacements, additions, betterments and improvements to the Oil
     and Gas Properties and other assets and properties as are needed and proper
     so that the business carried on in connection therewith may be conducted
     properly and efficiently at all times in the opinion of the Borrower
     exercised in good faith; (iii) take or cause to be taken whatever actions
     are necessary or desirable to prevent an event or condition of default by
     Borrower under the provisions of any gas purchase or sales contract or any
     other contract, agreement or lease comprising a part of the Oil and Gas
     Properties or other collateral security hereunder which default could
     reasonably be expected to result in a Material Adverse Effect; and (iv)
     furnish Agent upon request evidence satisfactory to Agent that there are no
     Liens, claims or encumbrances on the Oil and Gas Properties, except
     laborers', vendors', repairmen's, mechanics', worker's, or materialmen's
     liens arising by operation of law or incident to the construction or
     improvement of property if the obligations secured thereby are not yet due
     or are being contested in good faith by appropriate legal proceedings or
     Permitted Liens.

          (o)  Operation of Properties.  Except as provided in Subsection 12(p)
               -----------------------
     and (q) below, the Borrower will, and will cause each Subsidiary to,
     operate, or use reasonable efforts to cause to be operated, all Oil and Gas
     Properties in a careful and efficient manner in accordance with the
     practice of the industry and in compliance in all material respects with
     all applicable laws, rules, and regulations, and in compliance in all
     material respects with all applicable proration and conservation laws of
     the jurisdiction in which the properties are situated, and all applicable
     laws, rules, and regulations, of every other agency and authority from time
     to time constituted to regulate the development and operation of the
     properties and the production and sale of hydrocarbons and other minerals
     therefrom; provided, however, that the Borrower or any Subsidiary shall
     have the right to contest in good faith by appropriate proceedings, the
     applicability or lawfulness of any such law, rule or regulation and pending
     such contest may defer compliance therewith, as long as such deferment
     shall not subject the properties or any part thereof to foreclosure or
     loss.

          (p)  Compliance with Leases and Other Instruments.  The Borrower will,
               --------------------------------------------
     and will cause each Subsidiary to, pay or cause to be paid and discharge
     all rentals, delay rentals, royalties, production payment, and indebtedness
     required to be paid by Borrower (or required to keep unimpaired in all
     material respects the rights of Borrower or such Subsidiary in Oil and Gas
     Properties) accruing under, and perform or cause to be performed in all
     material respects each and every act, matter, or thing required of Borrower
     or such Subsidiary by each and all of the assignments, deeds, leases,
     subleases, contracts, and agreements in any way relating to Borrower or
     such Subsidiary or any of the Oil and Gas Properties and do all other
     things necessary of Borrower or such Subsidiary to keep unimpaired in all
     material respects the rights of Borrower or such Subsidiary thereunder and
     to prevent the forfeiture thereof or default thereunder; provided, however,
     that nothing in this Agreement shall be deemed to

                                      -37-
<PAGE>

     require Borrower or any Subsidiary to perpetuate or renew any oil and gas
     lease or other lease by payment of rental or delay rental or by
     commencement or continuation of operations nor to prevent Borrower or any
     Subsidiary from abandoning or releasing any oil and gas lease or other
     lease or well thereon when, in any of such events, in the opinion of
     Borrower or such Subsidiary exercised in good faith, it is not in the best
     interest of the Borrower or such Subsidiary to perpetuate the same.

          (q)  Certain Additional Assurances Regarding Maintenance and
               -------------------------------------------------------
     Operations of Properties.  With respect to those Oil and Gas Properties
     ------------------------
     which are being operated by operators other than the Borrower or its
     Subsidiaries, neither the Borrower nor its Subsidiaries shall be obligated
     to perform any undertakings contemplated by the covenants and agreement
     contained in Subsections 12(n), 12(o) or 12(p) hereof which are performable
     only by such operators and are beyond the control of the Borrower and its
     Subsidiaries; however, the Borrower and its Subsidiaries agree to promptly
     take all reasonable actions available under any operating agreements or
     otherwise to bring about the performance of any such material undertakings
     required to be performed thereunder.

          (r)  Sale of Certain Assets/Prepayment of Proceeds.  The Borrower will
               ---------------------------------------------
     immediately pay over to the Agent for the ratable benefit of the Banks as a
     prepayment of principal on the Revolving Notes, an amount equal to 100% of
     the Release Price.  The term "Release Price" as used herein shall mean a
     price determined by the Majority Banks in their discretion based upon the
     loan collateral value of the Oil and Gas Properties being sold by Borrower
     which such Banks in their discretion (using such methodology, assumptions
     and discounts rates as such Banks customarily use in assigning collateral
     value to oil and gas properties, oil and gas gathering systems, gas
     processing and plant operations) assign to such Oil and Gas Properties at
     the time in question.  Any such prepayment of principal on the Revolving
     Notes required by this Section 12(r), shall not be in lieu of, but shall be
     in addition to, any Monthly Commitment Reduction or any mandatory
     prepayment of principal required to be paid pursuant to Section 9(b)
     hereof.

          (s)  Title Matters.  Within sixty (60) days after the Effective Date
               -------------
     with respect to the Oil and Gas Properties listed on Schedule "7" hereto,
     Borrower shall furnish Agent with title opinions and/or title information
     reasonably satisfactory to Agent showing good and defensible title of
     Borrower to such Oil and Gas Properties subject only to the Permitted
     Liens.  As to any Oil and Gas Properties hereafter mortgaged to Agent,
     Borrower will promptly (but in no event more than thirty (30) days
     following such mortgaging), furnish Agent with title opinions and/or title
     information reasonably satisfactory to Agent showing good and defensible
     title of Borrower to such Oil and Gas Properties subject only to Permitted
     Liens.

          (t)  Curative Matters.  Within sixty (60) days after the date of the
               ----------------
     Effective Date with respect to matters listed on Schedule "8" and,
     thereafter, within sixty (60) days after receipt by Borrower from Agent or
     its counsel of written notice of title defects the Agent

                                      -38-
<PAGE>

     reasonably requires to be cured, Borrower shall either (i) provide such
     curative information, in form and substance satisfactory to Agent, or (ii)
     substitute Oil and Gas Properties of value and quality satisfactory to the
     Agent for all of Oil and Gas Properties for which such title curative was
     requested but upon which Borrower elected not to provide such title
     curative information, and, within sixty (60) days of such substitution,
     provide title opinions or title information satisfactory to the Agent
     covering the Oil and Gas Properties so substituted. If the Borrower fails
     to satisfy (i) or (ii) above within the time specified, the loan collateral
     value assigned by the Banks to the Oil and Gas Properties for which such
     curative information was requested shall be deducted from the Borrowing
     Base resulting in a reduction thereof.

          (u)  Change of Principal Place of Business.  Borrower shall give Agent
               -------------------------------------
     at least thirty (30) days prior written notice of its intention to move its
     principal place of business from the address set forth in Section 17
     hereof.

          (v)  Cash Collateral Accounts.  Borrower shall establish, and shall
               ------------------------
     cause each of its Subsidiaries to establish, and maintain with Agent one or
     more operating accounts for Borrower and each of its Subsidiaries (the
     "Operating Accounts") and lockbox accounts for Borrower and each of its
     Subsidiaries ("Lockbox Accounts"), the maintenance of each of which shall
     be subject to such rules and regulations as the Agent shall from time to
     time specify.  Such accounts shall be maintained with the Agent until all
     amounts due hereunder and under the Notes have been paid in full.  Borrower
     and each such Subsidiary shall within thirty (30) days of the Effective
     Date instruct and cause all monetary proceeds of production from the Oil
     and Gas Properties to be remitted to their respective Lockbox Accounts.
     Such proceeds of production shall not be redirected without the prior
     written consent of the Agent until such time as all indebtedness due Banks
     by Borrower has been paid in full and the Commitment has been terminated.
     If no Event of Default (and no event which, with notice or lapse of time or
     both, would become an Event of Default) has occurred and is continuing, the
     full balance of the Lockbox Accounts each day will be deposited into the
     Operating Accounts.  The Borrower hereby grants (and will cause the
     Subsidiaries to grant) a security interest to Banks in and to the Lockbox
     Accounts and the Operating Accounts (collectively, the "Cash Collateral
     Accounts") and all checks, drafts and other items ever received by any Bank
     for deposit therein.  If any Event of Default shall occur and be
     continuing, Agent shall have the immediate right, without prior notice or
     demand, to take and apply against the Borrower's obligations hereunder any
     and all funds legally and beneficially owned by the Borrower and any such
     Subsidiary then or thereafter on deposit in the Cash Collateral Accounts
     for the ratable benefit of the Banks.

          (w)  Year 2000 Compatibility.   Borrower covenants and agrees with
               -----------------------
     Banks that it will:

               (i)    Furnish such additional information, statements and other
          reports with respect to Borrower's activities, course of action and
          progress

                                      -39-
<PAGE>

          towards becoming Year 2000 Compliant as Banks may reasonably request
          from time to time;

               (ii)   In the event of any change in circumstances that causes or
          will likely cause any of Borrower's representations and warranties
          with respect to its being or becoming Year 2000 Compliant to no longer
          be true (hereinafter, referred to as a "Change in Circumstances") then
          Borrower shall promptly, and in any event within ten (10) days of
          receipt of information regarding a Change in Circumstances, provide
          Banks with written notice (the "Notice") that describes in reasonable
          detail the Change in Circumstances and how such Change in
          Circumstances caused or will likely cause Borrower's representations
          and warranties with respect to being or becoming Year 2000 Compliant
          no longer to be true.  Borrower shall, within ten (10) days of a
          request, also provide Banks with any additional information Banks
          reasonably request of Borrower in connection with the Notice and/or a
          Change in Circumstances.

          (x)  Subsidiary Guaranties.    At any time in which any Subsidiary of
               ---------------------
     Borrower is required to execute any Guaranty of the Subordinate Notes
     pursuant to Section 4.13 of the Subordinate Notes Indenture, Borrower will
     (a) cause such Subsidiary to execute and deliver to the Agent for the
     ratable benefit of the Banks, a Subsidiary Guaranty, and (b) deliver to the
     Agent such (i) resolutions of the Board of Directors of such Subsidiary
     Guarantor, (ii) certificates of officers of such Subsidiary Guarantor,
     (iii) Certificates of Good Standing and Existence for such Subsidiary
     Guarantor, and (iv) opinions of counsel, as Agent shall reasonably request
     to evidence the valid organization and existence of such Subsidiary
     Guarantor and the due authorization, execution, delivery and enforceability
     of such Subsidiary Guarantor, Subsidiary Guaranty and such other matters
     related to such Subsidiary and Subsidiary Guaranty as Agent shall request.

          (y)  Collateral.   The Oil and Gas Properties which are Collateral
               ----------
     shall be valued, as of the Effective Date, at at least $100,000,000.  From
     time to time after the Effective Date, the Borrower shall, upon the request
     of the Banks, mortgage additional oil and gas properties to the Banks and
     provide appropriate title information covering such properties upon the
     date each such new property is mortgaged, except that Borrower shall not be
     required, pursuant to this provision, to mortgage any undeveloped oil and
     gas properties to which no value has been assigned by the Banks.

          (z)  Escrow of Interest Payments.   Beginning June 15, 1999 and on or
               ---------------------------
     before the fifteenth (15th) day of each succeeding month, Borrower shall
     escrow with Agent an amount equal to one-sixth (1/6th) of the next semi-
     annual interest payment due on the Subordinate Notes.  Provided, however,
     that Borrower shall make any such required escrow payment to the Agent on
     or before the first (1st) day of any month in which an interest payment is
     due on such Subordinate Notes.  The Borrower hereby grants a security
     interest to Banks in such

                                      -40-
<PAGE>

     escrow account and all checks, drafts and other items ever received by any
     Bank for deposit therein. If any Event of Default shall occur and be
     continuing, Agent shall have the immediate right, without prior notice or
     demand, to take and apply against the Borrower's obligations hereunder any
     and all funds then or thereafter on deposit in such escrow accounts for the
     ratable benefit of the Banks. Unless Agent exercises such right, the amount
     so escrowed shall be released for payment of the accrued semi-annual
     interest payments on the Subordinate Notes on their due dates.
     Notwithstanding any other provision hereof, any amendment, modification or
     waiver of compliance with this covenant shall require the consent of
     Majority Banks.

          (aa) Collateral Shares.  The Borrower shall deliver, or shall cause
               -----------------
     to be delivered, within thirty (30) days after the Effective Date, share
     certificates representing all of the issued and outstanding stock of
     T.W.O.C., Inc., The Wiser Marketing Company, Wiser Oil Delaware, Inc.,
     Wiser Oil Company of Canada, Lechuza Energy Company and Wiser Northern
     Ireland, Ltd.

     13.  Negative Covenants.  A deviation from the provisions of this Section
13 shall not constitute an Event of Default under this Agreement if such
deviation is consented to in writing by the required percentage of the Banks
prior to the date of deviation.  The Borrower will at all times comply, and
cause each of its Subsidiaries to comply, with the covenants contained in this
Section 13 from the date hereof and for so long as the Revolving Commitment is
in existence or any amount is owed to the Agent, or the Banks under this
Agreement or the other Loan Documents.

          (a)  Negative Pledge.  Borrower shall not, and will not permit any
               ---------------
     Subsidiary to, without the prior written consent of the Banks:

               (i)    create, incur, assume or permit to exist any Lien,
          security interest or other encumbrance on any of its assets or
          properties except Permitted Liens; or

               (ii)   sell, lease, transfer or otherwise dispose of, in any
          fiscal year, any of its assets except for (A) sales, leases, transfers
          or other dispositions made in the ordinary course of Borrower' oil and
          gas businesses, (B) sales made with the consent of Majority Banks
          which are made pursuant to, and in full compliance with, Section 12(r)
          hereof, and (C) the Appalachia Sale and the Finley Sale.

          (b)  Consolidated Current Ratio.  The Borrower will not allow their
               --------------------------
     ratio of Consolidated Current Assets to Consolidated Current Liabilities to
     be less than 1.0 to 1.0 as of the end of any fiscal quarter.

          (c)  Minimum Consolidated Interest Coverage Ratio. The Borrower will
               --------------------------------------------
     not allow its Minimum Consolidated Interest Coverage Ratio to be less than
     (i) 1.25 to 1.0 as of any fiscal quarter through and including the fiscal
     quarter ended September 30, 1999, (ii) 1.50

                                      -41-
<PAGE>

     to 1.0 as of any fiscal quarter through and including the fiscal quarter
     ended December 31, 2000, and (iii) 1.75 to 1.0, for any fiscal quarter
     thereafter.

          (d)  Ratio of Consolidated Funded Debt to Consolidated Total Capital.
               ---------------------------------------------------------------
     The Borrower's Ratio of Consolidated Funded Debt to Consolidated Total
     Capital as of the end of any fiscal quarter will not ever be less than (i)
     .70 to 1.0 at any time through December 31, 1999, and (ii) .65 to 1.0 at
     any time thereafter.

          (e)  Capital Expenditure.  During Borrower's fiscal year 1999 ending
               -------------------
     on December 31, 1999, Borrower shall not make capital expenditures in
     excess of $5,000,000 in the aggregate.

          (f)  Consolidations and Mergers.  Borrower will not consolidate or
               --------------------------
     merge with or into any other Person, and Borrower will not permit any
     Subsidiary of Borrower to consolidate or merge with or into any Person,
     except that Borrower and any of its Subsidiaries may merge with another
     Person if Borrower or such Subsidiary is the surviving entity in such
     merger and if, after giving effect thereto, no Default or Event of Default
     shall have occurred and be continuing.

          (g)  Debts, Guaranties and Other Obligations.  Borrower will not, and
               ---------------------------------------
     will not permit any Subsidiary to, incur, create, assume or in any manner
     become or be liable in respect of any indebtedness, including guarantees or
     otherwise in any manner become or be liable in respect of any indebtedness,
     liabilities or other obligations of any other person or entity, whether by
     agreement to purchase the indebtedness of any other person or entity or
     agreement for the furnishing of funds to any other person or entity through
     the purchase or lease of goods, supplies or services (or by way of stock
     purchase, capital contribution, advance or loan) for the purpose of paying
     or discharging the indebtedness of any other person or entity, or
     otherwise, except that the foregoing restrictions shall not apply to:

               (i)    the Notes and any renewal or increase thereof, or other
          indebtedness of the Borrower heretofore disclosed to Banks in the
          Borrower's Financial Statements or on Schedule "3" hereto; or

               (ii)   taxes, assessments or other government charges which are
          not yet due or are being contested in good faith by appropriate action
          promptly initiated and diligently conducted, if such reserve as shall
          be required by GAAP shall have been made therefor and levy and
          execution thereon have been stayed and continue to be stayed; or

               (iii)  indebtedness (other than in connection with a loan or
          lending transaction) incurred in the ordinary course of business,
          including, but not limited to indebtedness for drilling, completing,
          leasing and reworking oil and gas wells; or

                                      -42-
<PAGE>

               (iv)   indebtedness owed by Borrower to a Subsidiary Guarantor or
          by a Subsidiary Guarantor to Borrower as a result of intercompany
          loans or advances; or

               (v)    indebtedness evidenced by the Subordinate Notes and any
          guaranties thereof; or

               (vi)   indebtedness owed to Bank of America on Hedging
          Obligations; or

               (vii)  Hedging Obligations permitted under Section 13(m) hereof;
          or

               (viii) any renewals or extensions of (but not increases in) any
          of the foregoing.

          (h)  Dividends or Distributions.  Borrower will not declare or pay any
               --------------------------
     cash dividend or distribution, purchase, redeem or otherwise acquire for
     value any of its stock now or hereafter outstanding, return any capital to
     its stockholders, or make any distribution of its assets to its
     stockholders as such.

          (i)  Loans and Advances.  Borrower shall make or permit to remain
               ------------------
     outstanding any loans or advances to or in any Person or entity, and
     Borrower will not permit any Subsidiary to make or permit to remain
     outstanding any loans and advances to any Person or entities except that
     the foregoing restriction shall not apply to:

               (i)    loans or advances to any person, the material details of
          which have been set forth in the Financial Statements heretofore
          furnished to Banks; or

               (ii)   advances made in the ordinary course of Borrower's and its
          Subsidiaries' oil and gas business; or

               (iii)  loans or advances among Borrower and the Subsidiary
          Guarantors.

          (j)  Sale or Discount of Receivables.  Borrower will not, and will not
               -------------------------------
     permit any Subsidiary to, discount or sell with recourse, or sell for less
     than the greater of the face or market value thereof, any of its notes
     receivable or accounts receivable.

          (k)  Nature of Business.  Borrower will not permit, and will not
               ------------------
     permit any Subsidiary to make, any material change to be made in the
     character of its business as carried on at the date hereof.

          (l)  Transactions with Affiliates.  Borrower will not, and will not
               ----------------------------
     permit any Subsidiary to, enter into any transaction with any Affiliate
     other than transactions between

                                      -43-
<PAGE>

     Borrower and its Guarantor Subsidiaries, except transactions upon terms
     that are no less favorable to it than would be obtained in a transaction
     negotiated at arm's length with an unrelated third party.

          (m)  Hedging Transactions.  Borrower will not, and will not permit any
               --------------------
     Subsidiary to, enter into any transaction providing (i) for the hedging,
     forward sale, swap or any deviation thereof of crude oil or natural gas or
     other commodities, or (ii) for a swap, collar, floor, cap, option,
     corridor, or other contract which is intended to reduce or eliminate the
     risk of fluctuation in interest rates, as such terms are referred to in the
     capital markets, except the foregoing prohibitions shall not apply to (x)
     transactions consented to in writing by the Banks which are on terms
     acceptable to the Banks, or (y) Pre-Approved Contracts.

          (n)  Investments.  Borrower shall not, and shall not permit any
               -----------
     Subsidiary to, make any investments in any person or entity, except such
     restriction shall not apply to:

               (i)    investments and direct obligations of the United States of
          America or any agency thereof;

               (ii)   investments in certificates of deposit issued by the Banks
          or certificates of deposit with maturities of less than one year,
          issued by other commercial banks in the United States having capital
          and surplus in excess of $500,000,000 and which have a rating of (A)
          50 or above by Sheshunoff and (B) "B" or above by Keef-Bruett; or

               (iii)  investments in insured money market funds, Eurodollar
          investment accounts and other similar accounts at Agent or such
          investments with maturities of less than ninety (90) days at other
          commercial banks having capital and surplus in excess of $500,000,000
          and which have a rating of (A) 50 or above by Sheshunoff and (B) "B"
          or above by Keef-Bruett.

          (o)  Amendment to Articles of Incorporation or Bylaws.  Borrower will
               ------------------------------------------------
     not permit any amendment to, or any alteration of, its Articles of
     Incorporation or Bylaws nor will it permit any Subsidiary to make any
     amendment to, or alteration of, its Articles of Incorporation or Bylaws.

          (p)  Purchase or Prepayment of Other Indebtedness.  Except as
               --------------------------------------------
     otherwise provided for in this Agreement, neither Borrower nor any
     Subsidiary shall make any unscheduled principal payments or redeem any of
     their indebtedness (other than indebtedness owed the Banks hereunder),
     including, without limitation, the Subordinate Notes or purchase or redeem
     any of the Subordinate Notes on the open market or purchase or redeem any
     of their equity unless such payment, prepayment, redemption or purchase is
     approved by Majority Banks.

                                      -44-
<PAGE>

          (q)  Proceeds of Production.  Borrower shall not redirect the payment
               ----------------------
     of proceeds of production from the Oil and Gas Properties to anyone or any
     place other than to the Lockbox Account at the Agent.

          (r)  Issuance of Preferred Stock.  Neither Borrower nor any Subsidiary
               ---------------------------
     shall issue any preferred stock after the Effective Date without the
     consent of Majority Banks.

          (s)  Amendments, Etc. of Indenture.  Except as specifically provided
               ------------------------------
     hereby, the Borrower shall not make nor allow to be made (i) any amendments
     or modifications to the Subordinate Notes Indenture, (ii) any prepayments
     or redemptions of the Subordinate Notes, unless any such action is approved
     by Majority Banks.

     14.  Events of Default.  Any one or more of the following events shall be
considered an "Event of Default" as that term is used herein:

          (a)  The Borrower shall fail to pay when due or declared due the
     principal of, and the interest on, the Notes, or any fee or any other
     indebtedness of the Borrower incurred pursuant to this Agreement or any
     other Loan Document; or

          (b)  Any representation or warranty made by Borrower under this
     Agreement, or in any certificate or statement furnished or made to the
     Banks pursuant hereto, or in connection herewith, or in connection with any
     document furnished hereunder, shall prove to be untrue in any material
     respect as of the date on which such representation or warranty is made (or
     deemed made), or any representation, statement (including financial
     statements), certificate, report or other data furnished or to be furnished
     or made by Borrower under any Loan Document, including this Agreement,
     proves to have been untrue in any material respect, as of the date as of
     which the facts therein set forth were stated or certified; or

          (c)  Default shall be made in the due observance or performance of any
     of the covenants or agreements of the Borrower or any Subsidiary contained
     in the Loan Documents, including this Agreement (excluding covenants
     contained in Section 13 of the Agreement for which there is no cure
     period), and such default shall continue for more than thirty (30) days
     after receipt by the Borrower of notice thereof from the Agent; or

          (d)  Default shall be made in the due observance or performance of the
     covenants of Borrower or any Subsidiary contained in Section 13 of this
     Agreement; or

          (e)  Default shall be made in respect of any obligation for borrowed
     money, other than the Notes, for which Borrower or any Subsidiary is liable
     (directly, by assumption, as guarantor or otherwise), or any obligations
     (other than those described in Section 12(d) hereof which are being
     contested in good faith as required by such Section) secured by any
     mortgage, pledge or other security interest, lien, charge or encumbrance
     with respect thereto, on any asset or property of Borrower or in respect of
     any agreement relating to any such

                                      -45-
<PAGE>

     obligations unless Borrower or such Subsidiary is not liable for same
     (i.e., unless remedies or recourse for failure to pay such obligations is
     limited to foreclosure of the collateral security therefor), and if such
     default shall continue beyond the applicable grace period, if any; or

          (f)  Borrower or any Subsidiary shall commence a voluntary case or
     other proceedings seeking liquidation, reorganization or other relief with
     respect to itself or its debts under any bankruptcy, insolvency or other
     similar law now or hereafter in effect or seeking an appointment of a
     trustee, receiver, liquidator, custodian or other similar official of it or
     any substantial part of its property, or shall consent to any such relief
     or to the appointment of or taking possession by any such official in an
     involuntary case or other proceeding commenced against it, or shall make a
     general assignment for the benefit of creditors, or shall fail generally to
     pay its debts as they become due, or shall take any corporate action
     authorizing the foregoing; or

          (g)  An involuntary case or other proceeding, shall be commenced
     against Borrower or any Subsidiary seeking liquidation, reorganization or
     other relief with respect to it or its debts under any bankruptcy,
     insolvency or similar law now or hereafter in effect or seeking the
     appointment of a trustee, receiver, liquidator, custodian or other similar
     official of it or any substantial part of its property, and such
     involuntary case or other proceeding shall remain undismissed and unstayed
     for a period of sixty (60) days; or an order for relief shall be entered
     against Borrower or any Subsidiary under the federal bankruptcy laws as now
     or hereinafter in effect; or

          (h)  A final judgment or order for the payment of money in excess of
     $1,000,000 (or judgments or orders aggregating in excess of $1,000,000)
     shall be rendered against Borrower or any Subsidiary and such judgments or
     orders shall continue unsatisfied and unstayed for a period of thirty (30)
     days; or

          (i)  In the event the Total Outstandings shall at any time exceed the
     Borrowing Base established for the Revolving Notes, and the Borrower shall
     fail to comply with the provisions of Section 9(b) hereof; or

          (j)  A Change of Control shall occur; or

          (k)  A Change of Management shall occur; or

          (l)  An event of default shall occur under the Subordinate Notes
     Indenture.

     Upon occurrence of any Event of Default specified in Subsections 14(f) and
(g) hereof, the entire principal amount due under the Notes and all interest
then accrued thereon, and any other liabilities of the Borrower hereunder, shall
become immediately due and payable all without notice and without presentment,
demand, protest, notice of protest or dishonor or any other notice of default

                                      -46-
<PAGE>

of any kind, all of which are hereby expressly waived by the Borrower. Upon the
occurrence of any other Event of Default, the Agent, on request of Majority
Banks, shall by notice to the Borrower declare the principal of, and all
interest then accrued on, the Notes and any other liabilities hereunder to be
forthwith due and payable, whereupon the same shall forthwith become due and
payable without presentment, demand, protest, notice of intent to accelerate,
notice of acceleration or other notice of any kind, all of which the Borrower
hereby expressly waives, anything contained herein or in the Notes to the
contrary notwithstanding. Nothing contained in this Section 14 shall be
construed to limit or amend in any way the Events of Default enumerated in the
Note, or any other document executed in connection with the transaction
contemplated herein.

     Upon the occurrence and during the continuance of any Event of Default, the
Banks are hereby authorized at any time and from time to time, without notice to
the Borrower (any such notice being expressly waived by the Borrower), to set-
off and apply any and all deposits (general or special, time or demand,
provisional or final) at any time held and other indebtedness at any time owing
by any of the Banks to or for the credit or the account of the Borrower against
any and all of the indebtedness of the Borrower under the Notes and the Loan
Documents, including this Agreement, irrespective of whether or not the Banks
shall have made any demand under the Loan Documents, including this Agreement or
the Notes and although such indebtedness may be unmatured.  Any amount set-off
by any of the Banks shall be applied against the indebtedness owed the Banks by
the Borrower pursuant to this Agreement and the Notes.  The Banks agree promptly
to notify the Borrower after any such setoff and application, provided that the
failure to give such notice shall not affect the validity of such set-off and
application.  The rights of the Bank under this Section are in addition to other
rights and remedies (including, without limitation, other rights of set-off)
which the Banks may have.

     15.  The Agent and the Banks.

          (a)  Appointment and Authorization.  Each Bank hereby appoints Agent
               -----------------------------
     as its nominee and agent, in its name and on its behalf: (i) to act as
     nominee for and on behalf of such Bank in and under all Loan Documents;
     (ii) to arrange the means whereby the funds of Banks are to be made
     available to the Borrower under the Loan Documents; (iii) to take such
     action as may be requested by any Bank under the Loan Documents (when such
     Bank is entitled to make such request under the Loan Documents); (iv) to
     receive all documents and items to be furnished to Banks under the Loan
     Documents; (v) to be the secured party, mortgagee, beneficiary, and similar
     party in respect of, and to receive, as the case may be, any collateral for
     the benefit of Banks; (vi) to promptly distribute to each Bank all material
     information, requests, documents and items received from the Borrower under
     the Loan Documents; (vii) to promptly distribute to each Bank such Bank's
     Pro Rata Part of each payment or prepayment (whether voluntary, as proceeds
     of insurance thereon, or otherwise) in accordance with the terms of the
     Loan Documents and (viii) to deliver to the appropriate Persons requests,
     demands, approvals and consents received from Banks.  With respect to its
     commitments hereunder and the Notes issued to it, Agent and any successor
     Agent shall have the same rights under the Loan Documents as any other Bank
     and may exercise the

                                      -47-
<PAGE>

     same as though it were not the Agent; and the term "Bank" or "Banks" shall,
     unless otherwise expressly indicated, include Agent and any successor Agent
     in its capacity as a Bank. Agent, and any successor Agent and its
     Affiliates may accept deposits from, lend money to, act as trustee under
     indentures of and generally engage in any kind of business with the
     Borrower, and any person which may do business with the Borrower, all as if
     Agent and any successor Agent were not Agent hereunder and without any duty
     to account therefor to the Banks; provided that, if any payments in respect
     of any property (or the proceeds thereof) now or hereafter in the
     possession or control of Agent which may be or become security for the
     obligations of the Borrower arising under the Loan Documents by reason of
     the general description of indebtedness secured or of property contained in
     any other agreements, documents or instruments related to any such other
     business shall be applied to reduction of the obligations of the Borrower
     arising under the Loan Documents, then each Bank shall be entitled to share
     in such application according to its pro rata part thereof. Each Bank, upon
     request of any other Bank, shall disclose to all other Banks all
     indebtedness and liabilities, direct and contingent, of the Borrower to
     such Bank as of the time of such request.

          (b)  Note Holders.  From time to time as other Banks become a party to
               ------------
     this Agreement after receiving the consent of the Borrower, Agent shall
     obtain execution by the Borrower of additional Notes in amounts
     representing the Commitment of each such new Bank, up to an aggregate face
     amount of all Revolving Notes not exceeding $25,000,000. The obligation of
     such Bank shall be governed by the provisions of this Agreement, including
     but not limited to, the obligations specified in Section 2 hereof.  From
     time to time, Agent may require that the Banks exchange their Notes for
     newly issued Notes to better reflect the Commitment of the Banks.  Agent
     may treat the payee of any Note as the holder thereof until written notice
     of transfer has been filed with it, signed by such payee and in form
     satisfactory to Agent.

          (c)  Consultation with Counsel.  Banks agree that Agent may consult
               -------------------------
     with legal counsel selected by Agent and shall not be liable for any action
     taken or suffered in good faith by it in accordance with the advice of such
     counsel.  Banks acknowledge that Gardere & Wynne, L.L.P. is counsel for
     Bank One, both as Agent and as a Bank, and that such firm does not
     represent any of the other Banks in connection with this transaction.

          (d)  Documents.  Agent shall not be under a duty to examine or pass
               ---------
     upon the validity, effectiveness, enforceability, genuineness or value of
     any of the Loan Documents or any other instrument or document furnished
     pursuant thereto or in connection therewith, and Agent shall be entitled to
     assume that the same are valid, effective, enforceable and genuine and what
     they purport to be.

          (e)  Resignation or Removal of Agent.  Subject to the appointment and
               -------------------------------
     acceptance of a successor Agent as provided below, Agent may resign at any
     time by giving written notice thereof to Banks and the Borrower, and Agent
     may be removed at any time with or

                                      -48-
<PAGE>

     without cause by Majority Banks. If no successor Agent has been so
     appointed by Majority Banks (and approved by the Borrower) and has accepted
     such appointment within 30 days after the retiring Agent's giving of notice
     of resignation or removal of the retiring Agent, then the retiring Agent
     may, on behalf of Banks, appoint a successor Agent. Any successor Agent
     must be approved by Borrower, which approval will not be unreasonably
     withheld. Upon the acceptance of any appointment as Agent hereunder by a
     successor Agent, such successor Agent shall thereupon succeed to and become
     vested with all the rights and duties of the retiring Agent, and the
     retiring Agent, as the case may be, shall be discharged from its duties and
     obligations hereunder. After any retiring Agent's resignation or removal
     hereunder as Agent, the provisions of this Section 15 shall continue in
     effect for its benefit in respect to any actions taken or omitted to be
     taken by it while it was acting as Agent. To be eligible to be an Agent
     hereunder the party serving, or to serve, in such capacity must own a Pro
     Rata Part of the Commitment equal to the level of Commitment required to be
     held by any Bank pursuant to Section 28 hereof.

          (f)  Responsibility of Agent.  It is expressly understood and agreed
               -----------------------
     that the obligations of Agent under the Loan Documents are only those
     expressly set forth in the Loan Documents as to each and that Agent shall
     be entitled to assume that no Default or Event of Default has occurred and
     is continuing, unless Agent has actual knowledge of such fact or has
     received notice from a Bank or the Borrower that such Bank or the Borrower
     consider that a Default or an Event of Default has occurred and is
     continuing and specifying the nature thereof.  Neither Agent, nor any of
     its directors, officers, attorneys or employees shall be liable for any
     action taken or omitted to be taken by them under or in connection with the
     Loan Documents, except for its or their own gross negligence or willful
     misconduct. Agent shall not incur liability under or in respect of any of
     the Loan Documents by acting upon any notice, consent, certificate,
     warranty or other paper or instrument believed by it to be genuine or
     authentic or to be signed by the proper party or parties, or with respect
     to anything which it may do or refrain from doing in the reasonable
     exercise of its judgment, or which may seem to it to be necessary or
     desirable.

          Agent shall not be responsible to Banks for any of the Borrower's
     recitals, statements, representations or warranties contained in any of the
     Loan Documents, or in any certificate or other document referred to or
     provided for in, or received by any Bank under, the Loan Documents, or for
     the value, validity, effectiveness, genuineness, enforceability or
     sufficiency of or any of the Loan Documents or for any failure by the
     Borrower to perform any of their obligations hereunder or thereunder.
     Agent may employ agents and attorneys-in-fact and shall not be answerable,
     except as to money or securities received by it or its authorized agents,
     for the negligence or misconduct of any such agents or attorneys-in-fact
     selected by it with reasonable care.

          The relationship between Agent and each Bank is only that of agent and
     principal and has no fiduciary aspects.  Nothing in the Loan Documents or
     elsewhere shall be construed to impose on Agent any duties or
     responsibilities other than those for which express

                                      -49-
<PAGE>

     provision is therein made. In performing its duties and functions
     hereunder, Agent does not assume and shall not be deemed to have assumed,
     and hereby expressly disclaims, any obligation or responsibility toward or
     any relationship of agency or trust with or for the Borrower or any of its
     beneficiaries or other creditors. As to any matters not expressly provided
     for by the Loan Documents, Agent shall not be required to exercise any
     discretion or take any action, but shall be required to act or to refrain
     from acting (and shall be fully protected in so acting or refraining from
     acting) upon the instructions of all Banks and such instructions shall be
     binding upon all Banks and all holders of the Notes; provided, however,
     that Agent shall not be required to take any action which is contrary to
     the Loan Documents or applicable law.

          Agent shall have the right to exercise or refrain from exercising,
     without notice or liability to the Banks, any and all rights afforded to
     Agent by the Loan Documents or which Agent may have as a matter of law;
     provided, however, Agent shall not (i) except as provided in Section 7(b)
     hereof, without the consent of Majority Banks designate the amount of the
     Borrowing Base or the Monthly Commitment Reduction (except for increase
     thereof) or (ii) without the consent of Majority Banks, take any other
     action with regard to amending the Loan Documents, waiving any default
     under the Loan Documents or taking any other action with respect to the
     Loan Documents which requires consent of Majority Banks. Provided further,
     however, that no amendment, waiver, or other action shall be effected
     pursuant to the preceding clause (ii) without the consent of all Banks
     which: (i) would increase the Revolving Commitment of any Bank, (ii) would
     reduce any fees hereunder, or the principal of, or the interest on, any
     Bank's Note or Notes, (iii) would postpone any date fixed for any payment
     of any fees hereunder, or any principal or interest of any Bank's Note or
     Notes, (iv) would materially increase any Bank's obligations hereunder or
     would materially alter Agent's obligations to any Bank hereunder, (v) would
     release Borrower from their obligation to pay any Bank's Note or Notes,
     (vi) release any of the Collateral except for that Collateral allowed to be
     sold under Section 13(a)(ii), (vii) would change the definition of Majority
     Banks, (viii) would amend, modify or change any provision of this Agreement
     requiring the consent of all the Banks, (ix) would waive any of the
     conditions precedent to the Effective Date or the making of any Loan or
     issuance of any Letter of Credit or (x) would extend the Revolving Maturity
     Date or (xi) would increase the Borrowing Base or (xii) would amend this
     sentence or the previous sentence.  Agent shall  have no liability to Banks
     for failure or delay in exercising any right or power possessed by Agent
     pursuant to the Loan Documents or otherwise unless such failure or delay is
     caused by the gross negligence of the Agent, in which case only the Agent
     responsible for such gross negligence shall have liability therefor to the
     Banks.

          (g)  Independent Investigation.  Each Bank severally represents and
               -------------------------
     warrants to Agent that it has made its own independent investigation and
     assessment of the financial condition and affairs of the Borrower in
     connection with the making and continuation of its participation hereunder
     and has not relied exclusively on any information provided to such Bank by
     Agent in connection herewith, and each Bank represents, warrants and
     undertakes

                                      -50-
<PAGE>

     to Agent that it shall continue to make its own independent appraisal of
     the credit worthiness of the Borrower while the Notes are outstanding or
     its commitments hereunder are in force. Agent shall not be required to keep
     itself informed as to the performance or observance by the Borrower of this
     Agreement or any other document referred to or provided for herein or to
     inspect the properties or books of the Borrower. Other than as provided in
     this Agent shall have no duty, responsibility or liability to provide any
     Bank with any credit or other information concerning the affairs, financial
     condition or business of the Borrower which may come into the possession of
     Agent.

          (h)  Indemnification. Banks agree to indemnify Agent, ratably
               ---------------
     according to their respective Commitment on a Pro Rata basis, from and
     against any and all liabilities, obligations, losses, damages, penalties,
     actions, judgments, suits, costs, expenses or disbursements of any proper
     and reasonable kind or nature whatsoever which may be imposed on, incurred
     by or asserted against Agent in any way relating to or arising out of the
     Loan Documents or any action taken or omitted by Agent under the Loan
     Documents, provided that no Bank shall be liable for any portion of such
     liabilities, obligations, losses, damages, penalties, actions, judgments,
     suits, costs, expenses or disbursements resulting from Agent's gross
     negligence or willful misconduct.  Each Bank shall be entitled to be
     reimbursed by the Agent for any amount such Bank paid to Agent under this
     Section 15(h) to the extent the Agent has been reimbursed for such payments
     by the Borrower or any other Person.  The parties intend for the provisions
     of this Section to apply to and protect the Agent from the consequences of
     any liability including strict liability imposed or threatened to be
     imposed on Agent as well as from the consequences of its own negligence,
     whether or not that negligence is the sole, contributing or concurring
     cause of any such liability.

          (i)  Benefit of Section 15.  The agreements contained in this Section
               ---------------------
     15 are solely for the benefit of Agent and the Banks and are not for the
     benefit of, or to be relied upon by, the Borrower, any affiliate of the
     Borrower or any other person.

          (j)  Pro Rata Treatment.  Subject to the provisions of this Agreement,
               ------------------
     each payment (including each prepayment) by the Borrower and collection by
     Banks (including offsets) on account of the principal of and interest on
     the Notes and fees provided for in this Agreement, payable by the Borrower
     shall be made Pro Rata; provided, however, in the event that any Defaulting
     Bank shall have failed to make an Advance as contemplated under Section 3
     hereof and Agent or another Bank or Banks shall have made such Advance,
     payment received by Agent for the account of such Defaulting Bank or Banks
     shall not be distributed to such Defaulting Bank or Banks until such
     Advance or Advances shall have been repaid in full to the Bank or Banks who
     funded such Advance or Advances.

          (k)  Assumption as to Payments.  Except as specifically provided
               -------------------------
     herein, unless Agent shall have received notice from the Borrower prior to
     the date on which any payment is due to Banks hereunder that the Borrower
     will not make such payment in full, Agent may,

                                      -51-
<PAGE>

     but shall not be required to, assume that the Borrower has made such
     payment in full to Agent on such date and Agent may, in reliance upon such
     assumption, cause to be distributed to each Bank on such due date an amount
     equal to the amount then due such Bank. If and to the extent the Borrower
     shall not have so made such payment in full to Agent, each Bank shall repay
     to Agent forthwith on demand such amount distributed to such Bank together
     with interest thereon, for each day from the date such amount is
     distributed to such Bank until the date such Bank repays such amount to
     Agent, at the interest rate applicable to such portion of the Revolving
     Loan.

          (l)  Other Financings.  Without limiting the rights to which any Bank
               ----------------
     otherwise is or may become entitled, such Bank shall have no interest, by
     virtue of this Agreement or the Loan Documents, in (a) any present or
     future loans from, letters of credit issued by, or leasing or other
     financial transactions by, any other Bank to, on behalf of, or with the
     Borrower (collectively referred to herein as "Other Financings") other than
     the obligations hereunder; (b) any present or future guarantees by or for
     the account of the Borrower which are not contemplated by the Loan
     Documents; (c) any present or future property taken as security for any
     such Other Financings; or (d) any property now or hereafter in the
     possession or control of any other Bank which may be or become security for
     the obligations of the Borrower arising under any loan document by reason
     of the general description of indebtedness secured or property contained in
     any other agreements, documents or instruments relating to any such Other
     Financings.

          (m)  Interests of Banks.  Nothing in this Agreement shall be construed
               ------------------
     to create a partnership or joint venture between Banks for any purpose.
     Agent, Banks and the Borrower recognize that the respective obligations of
     Banks under the Commitment shall be several and not joint and that neither
     Agent, nor any of Banks shall be responsible or liable to perform any of
     the obligations of the other under this Agreement.  Each Bank is deemed to
     be the owner of an undivided interest in and to all rights, titles,
     benefits and interests belonging and accruing to Agent under the Security
     Instruments, including, without limitation, liens and security interests in
     any collateral, fees and payments of principal and interest by the Borrower
     under the Commitment on a Pro Rata basis.  Each Bank shall perform all
     duties and obligations of Banks under this Agreement in the same proportion
     as its ownership interest in the Loan outstanding at the date of
     determination thereof.

          (n)  Investments.  Whenever Agent in good faith determines that it is
               -----------
     uncertain about how to distribute to Banks any funds which it has received,
     or whenever Agent in good faith determines that there is any dispute among
     the Banks about how such funds should be distributed, Agent may choose to
     defer distribution of the funds which are the subject of such uncertainty
     or dispute.  If Agent in good faith believes that the uncertainty or
     dispute will not be promptly resolved, or if Agent is otherwise required to
     invest funds pending distribution to the Banks, Agent may invest such funds
     pending distribution (at the risk of the Borrower). All interest on any
     such investment shall be distributed upon the distribution of such
     investment and in the same proportions and to the same Persons as such
     investment.  All

                                      -52-
<PAGE>

     monies received by Agent for distribution to the Banks (other than to the
     Person who is Agent in its separate capacity as a Bank) shall be held by
     the Agent pending such distribution solely as Agent for such Banks, and
     Agent shall have no equitable title to any portion thereof.

     16.  Exercise of Rights.  No failure to exercise, and no delay in
exercising, on the part of the Agent or the Banks, any right hereunder shall
operate as a waiver thereof, nor shall any single or partial exercise thereof
preclude any other or further exercise thereof or the exercise of any other
right.  The rights of the Agent and the Banks hereunder shall be in addition to
all other rights provided by law.  No modification or waiver of any provision of
the Loan Documents, including this Agreement, or the Note nor consent to
departure therefrom, shall be effective unless in writing, and no such consent
or waiver shall extend beyond the particular case and purpose involved.  No
notice or demand given in any case shall constitute a waiver of the right to
take other action in the same, similar or other circumstances without such
notice or demand.

     17.  Notices.  Any notices or other communications required or permitted to
be given by this Agreement or any other documents and instruments referred to
herein must be given in writing (which may be by facsimile transmission) and
must be personally delivered or mailed by prepaid certified or registered mail
to the party to whom such notice or communication is directed at the address of
such party as follows:  (a) BORROWER: THE WISER OIL COMPANY, 8115 Preston Road,
Suite 400, Dallas, Texas 75225, Facsimile No. (214) 373-3610, Attention:
Lawrence J. Finn, Vice President and Chief Financial Officer and (b) AGENT: BANK
ONE, TEXAS, N.A., 1717 Main Street, Dallas, Texas 75201, Facsimile No. (214)
290-2332, Attention: Mynan C. Feldman, Vice President.  Any such notice or other
communication shall be deemed to have been given (whether actually received or
not) on the day it is personally delivered or delivered by facsimile as
aforesaid or, if mailed, on the third day after it is mailed as aforesaid.  Any
party may change its address for purposes of this Agreement by giving notice of
such change to the other party pursuant to this Section 17.  Any notice required
to be given to the Banks shall be given to the Agent and distributed to all
Banks by the Agent.

     18.  Expenses.  The Borrower shall pay (i) all reasonable and necessary
out-of-pocket expenses of the Banks, including reasonable fees and disbursements
of special counsel for the Agent, in connection with the preparation of this
Agreement, any waiver or consent hereunder or any amendment hereof or any
default or Event of Default or alleged default or Event of Default hereunder,
(ii) all reasonable and necessary out-of-pocket expenses of the Agent, including
reasonable fees and disbursements of special counsel for the Agent in connection
with the preparation of any participation agreement for a participant or
participants requested by the Borrower or any amendment thereof and (iii) if  an
Event of Default occurs, all reasonable and necessary out-of-pocket expenses
incurred by the Banks, including fees and disbursements of counsel, in
connection with such Event of Default and collection and other enforcement
proceedings resulting therefrom.  The Borrower hereby acknowledges that Gardere
& Wynne, L.L.P. is special counsel to Bank One, as Agent and as a Bank, under
this Agreement and that it is not counsel to, nor does it represent the Borrower
or any of its Subsidiaries in connection with the

                                      -53-
<PAGE>

transactions described in this Agreement. The Borrower is relying on separate
counsel in the transaction described herein. The Borrower shall indemnify the
Banks against any transfer taxes, document taxes, assessments or charges made by
any governmental authority by reason of the execution, delivery and filing of
the Loan Documents. The obligations of this Section 18 shall survive any
termination of this Agreement, the expiration of the Loan and the payment of all
indebtedness of the Borrower to the Banks hereunder and under the Notes.

     19.  Indemnity.  The Borrower agrees to indemnify and hold harmless the
Banks and their respective officers, employees, agents, attorneys and
representatives (singularly, an "Indemnified Party", and collectively, the
"Indemnified Parties") from and against any loss, cost, liability, damage or
expense (including the reasonable fees and out-of-pocket expenses of counsel to
the Banks, including all local counsel hired by such counsel) ("Claim") incurred
by the Banks in investigating or preparing for, defending against, or providing
evidence, producing documents or taking any other action in respect of any
commenced or threatened litigation, administrative proceeding or investigation
under any federal securities law, federal or state environmental law, or any
other statute of any jurisdiction, or any regulation, or at common law or
otherwise, which is alleged to arise out of or is based upon any acts, practices
or omissions or alleged acts, practices or omissions of the Borrower or their
agents or arises in connection with the duties, obligations or performance of
the Indemnified Parties in negotiating, preparing, executing, accepting,
keeping, completing, countersigning, issuing, selling, delivering, releasing,
assigning, handling, certifying, processing or receiving or taking any other
action with respect to the Loan Documents and all documents, items and materials
contemplated thereby even if any of the foregoing arises out of an Indemnified
Party's ordinary negligence.  The indemnity set forth herein shall be in
addition to any other obligations or liabilities of the Borrower to the Banks
hereunder or at common law or otherwise, and shall survive any termination of
this Agreement, the expiration of the Loan and the payment of all indebtedness
of the Borrower to the Banks hereunder and under the Notes, provided that the
Borrower shall have no obligation under this Section to the Bank with respect to
any of the foregoing arising out of the gross negligence or willful misconduct
of the Bank.  If any Claim is asserted against any Indemnified Party, the
Indemnified Party shall endeavor to notify the Borrower of such Claim (but
failure to do so shall not affect the indemnification herein made except to the
extent of the actual harm caused by such failure).  The Indemnified Party shall
have the right to employ, at the Borrower's expense, counsel of the Indemnified
Parties' choosing and to control the defense of the Claim.  The Borrower may at
their own expense also participate in the defense of any Claim.  Each
Indemnified Party may employ separate counsel in connection with any Claim to
the extent such Indemnified Party believes it reasonably prudent to protect such
Indemnified Party.  The parties intend for the provisions of this Section to
apply to and protect each Indemnified Party from the consequences of any
liability including strict liability imposed or threatened to be imposed on
Agent as well as from the consequences of its own negligence, whether or not
that negligence is the sole, contributing, or concurring cause of any Claim.

                                      -54-
<PAGE>

     20.  Governing Law.  THIS AGREEMENT IS BEING EXECUTED AND DELIVERED, AND IS
INTENDED TO BE PERFORMED, IN DALLAS, DALLAS COUNTY, TEXAS, AND THE SUBSTANTIVE
LAWS OF TEXAS SHALL GOVERN THE VALIDITY, CONSTRUCTION, ENFORCEMENT AND
INTERPRETATION OF THIS AGREEMENT AND ALL OTHER DOCUMENTS AND INSTRUMENTS
REFERRED TO HEREIN, UNLESS OTHERWISE SPECIFIED THEREIN.

     21.  Invalid Provisions.  If any provision of this Agreement is held to be
illegal, invalid, or unenforceable under present or future laws effective during
the term of this Agreement, such provisions shall be fully severable and this
Agreement shall be construed and enforced as if such illegal, invalid or
unenforceable provision had never comprised a part of this Agreement, and the
remaining provisions of the Agreement shall remain in full force and effect and
shall not be affected by the illegal, invalid or unenforceable provision or by
its severance from this Agreement.

     22.  Maximum Interest Rate.  Regardless of any provisions contained in this
Agreement or in any other documents and instruments referred to herein, the
Banks shall never be deemed to have contracted for or be entitled to receive,
collect or apply as interest on the Notes any amount in excess of the Maximum
Rate, and in the event any Bank ever receives, collects or applies as interest
any such excess, or if an acceleration of the maturities of any Notes or if any
prepayment by the Borrower result in the Borrower having paid any interest in
excess of the Maximum Rate, such amount which would be excessive interest shall
be applied to the reduction of the unpaid principal balance of the Notes for
which such excess was received, collected or applied, and, if the principal
balance of such Note is paid in full, any remaining excess shall forthwith be
paid to the Borrower. All sums paid or agreed to be paid to the Banks for the
use, forbearance or detention of the indebtedness evidenced by the Notes and/or
this Agreement shall, to the extent permitted by applicable law, be amortized,
prorated, allocated and spread throughout the full term of such indebtedness
until payment in full so that the rate or amount of interest on account of such
indebtedness does not exceed the Maximum Rate.  In determining whether or not
the interest paid or payable under any specific contingency exceeds the Maximum
Rate of interest permitted by law, the Borrower and the Banks shall, to the
maximum extent permitted under applicable law, (i) characterize any non-
principal payment as an expense, fee or premium, rather than as interest; and
(ii) exclude voluntary prepayments and the effect thereof; and (iii) compare the
total amount of interest contracted for, charged or received with the total
amount of interest which could be contracted for, charged or received throughout
the entire contemplated term of the Note at the Maximum Rate.

     23.  Amendments.  This Agreement may be amended only by an instrument in
writing executed by an authorized officer of the party against whom such
amendment is sought to be enforced.

                                      -55-
<PAGE>

     24.  Multiple Counterparts.  This Agreement may be executed in a number of
identical separate counterparts, each of which for all purposes is to be deemed
an original, but all of which shall constitute, collectively, one agreement.  No
party to this Agreement shall be bound hereby until a counterpart of this
Agreement has been executed by all parties hereto.

     25.  Conflict.  In the event any term or provision hereof is inconsistent
with or conflicts with any provision of the Loan Documents, the terms or
provisions contained in this Agreement shall be controlling.

     26.  Survival.  All covenants, agreements, undertakings, representations
and warranties made in the Loan Documents, including this Agreement, the Notes
or other documents and instruments referred to herein shall survive all closings
hereunder and shall not be affected by any investigation made by any party.

     27.  Parties Bound.  This Agreement shall be binding upon and inure to the
benefit of the parties hereto and their respective successors, assigns, heirs,
legal representatives and estates, provided, however, that the Borrower may not,
without the prior written consent of all of the Banks, assign any rights,
powers, duties or obligations hereunder.

     28.  Assignments and Participations.

          (a)  Each Bank shall have the right to sell, assign or transfer all or
     any part of its Note or Notes, its Commitment and its rights and
     obligations hereunder to one or more Affiliates, Banks, financial
     institutions, pension plans, insurance companies, investment funds, or
     similar Persons who are Eligible Assignees or to a Federal Reserve Bank;
     provided, that in connection with each sale, assignment or transfer (other
     --------
     than to an Affiliate, a Bank or a Federal Reserve Bank), shall require the
     consent of Agent and the Borrower, which consents will not be unreasonably
     withheld; provided, however, that if an Event of Default has occurred and
     is continuing, the consent of the Borrower shall not be required.  Any such
     assignee, transferee or recipient shall have, to the extent of such sale,
     assignment, or transfer, the same rights, benefits and obligations as it
     would if it were such Bank and a holder of such Note, Commitment and rights
     and obligations, including, without limitation, the right to vote on
     decisions requiring consent or approval of all Banks or Majority Banks and
     the obligation to fund its Commitment; provided, that (1) each such sale,
     assignment, or transfer (other than to an Affiliate, a Bank or a Federal
     Reserve Bank) shall be in an aggregate principal amount not less than
     $5,000,000, (2) each remaining Bank shall at all times maintain Commitment
     then outstanding in an aggregate principal amount at least equal to
     $5,000,000; (3) each such sale, assignment or transfer shall be of a Pro
     Rata portion of such Bank's Revolving Commitment, (4) no Bank may offer to
     sell its Note or Notes, Commitment, rights and obligations or interests
     therein in violation of any securities laws; and (5) no such assignments
     (other than to a Federal Reserve Bank) shall become effective until the
     assigning Bank and its assignee delivers to Agent and Borrower an
     Assignment and Acceptance and the Note or Notes subject to such assignment
     and other documents

                                      -56-
<PAGE>

     evidencing any such assignment. An assignment fee in the amount of $3,500
     for each such assignment (other than to an Affiliate, a Bank or the Federal
     Reserve Bank) will be payable to Agent by assignor or assignee. Within five
     (5) Business Days after its receipt of copies of the Assignment and
     Acceptance and the other documents relating thereto and the Note or Notes,
     the Borrower shall execute and deliver to Agent (for delivery to the
     relevant assignee) a new Note or Notes evidencing such assignee's assigned
     Commitment and if the assignor Bank has retained a portion of its
     Commitment, a replacement Note in the principal amount of the Commitment
     retained by the assignor (except as provided in the last sentence of this
     paragraph (a) such Note or Notes to be in exchange for, but not in payment
     of, the Note or Notes held by such Bank). On and after the effective date
     of an assignment hereunder, the assignee shall for all purposes be a Bank,
     party to this Agreement and any other Loan Document executed by the Banks
     and shall have all the rights and obligations of a Bank under the Loan
     Documents, to the same extent as if it were an original party thereto, and
     no further consent or action by Borrower, Banks or the Agent shall be
     required to release the transferor Bank with respect to its Commitment
     assigned to such assignee and the transferor Bank shall henceforth be so
     released.

          (b)  Each Bank shall have the right to grant participations in all or
     any part of such Bank's Notes and Commitment hereunder to one or more
     pension plans, investment funds, insurance companies, financial
     institutions or other Persons, provided, that:

               (i)    each Bank granting a participation shall retain the right
          to vote hereunder, and no participant shall be entitled to vote
          hereunder on decisions requiring consent or approval of Bank or
          Majority Banks (except as set forth in (iii) below);

               (ii)   in the event any Bank grants a participation hereunder,
          such Bank's obligations under the Loan Documents shall remain
          unchanged, such Bank shall remain solely responsible to the other
          parties hereto for the performance of such obligations, such Bank
          shall remain the holder of any such Note or Notes for all purposes
          under the Loan Documents, and Agent, each Bank and Borrower shall be
          entitled to deal with the Bank granting a participation in the same
          manner as if no participation had been granted; and

               (iii)  no participant shall ever have any right by reason of its
          participation to exercise any of the rights of Banks hereunder, except
          that any Bank may agree with any participant that such Bank will not,
          without the consent of such participant (which consent may not be
          unreasonably withheld) consent to any amendment or waiver requiring
          approval of all Banks.

          (c)  It is understood and agreed that any Bank may provide to
     assignees and participants and prospective assignees and participants
     financial information and reports and

                                      -57-
<PAGE>

     data concerning Borrower's properties and operations which was provided to
     such Bank pursuant to this Agreement.

          (d)  Upon the reasonable request of either Agent or Borrower, each
     Bank will identify those to whom it has assigned or participated any part
     of its Notes and Commitment, and provide the amounts so assigned or
     participated.

     29.  Choice of Forum: Consent to Service of Process and Jurisdiction.  THE
OBLIGATIONS OF BORROWER UNDER THE LOAN DOCUMENTS ARE PERFORMABLE IN DALLAS
COUNTY, TEXAS.  ANY SUIT, ACTION OR PROCEEDING AGAINST THE BORROWER WITH RESPECT
TO THE LOAN DOCUMENTS OR ANY JUDGMENT ENTERED BY ANY COURT IN RESPECT THEREOF,
MAY BE BROUGHT IN THE COURTS OF THE STATE OF TEXAS, COUNTY OF DALLAS, OR IN THE
UNITED STATES COURTS LOCATED IN DALLAS COUNTY, TEXAS AND THE BORROWER HEREBY
SUBMITS TO THE NON-EXCLUSIVE JURISDICTION OF SUCH COURTS FOR THE PURPOSE OF ANY
SUCH SUIT, ACTION OR PROCEEDING.  THE BORROWER HEREBY IRREVOCABLY CONSENTS TO
SERVICE OF PROCESS IN ANY SUIT, ACTION OR PROCEEDING IN SAID COURT BY THE
MAILING THEREOF BY BANK BY REGISTERED OR CERTIFIED MAIL, POSTAGE PREPAID, TO THE
BORROWER, AS APPLICABLE, AT THE ADDRESS FOR NOTICES AS PROVIDED IN SECTION 17.
THE BORROWER HEREBY IRREVOCABLY WAIVES ANY OBJECTION WHICH IT MAY NOW OR
HEREAFTER HAVE TO THE LAYING OF VENUE OF ANY SUIT, ACTION OR PROCEEDING ARISING
OUT OF OR RELATING TO ANY LOAN DOCUMENT BROUGHT IN THE COURTS LOCATED IN THE
STATE OF TEXAS, COUNTY OF DALLAS, AND HEREBY FURTHER IRREVOCABLY WAIVES ANY
CLAIM THAT ANY SUCH SUIT, ACTION OR PROCEEDING BROUGHT IN ANY SUCH COURT HAS
BEEN BROUGHT IN AN INCONVENIENT FORUM.

     30.  Waiver of Jury Trial.  THE BORROWER HEREBY WAIVES, TO THE FULLEST
EXTENT PERMITTED BY APPLICABLE LAW, ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY
LEGAL PROCEEDING ARISING OUT OF OR RELATED TO THIS AGREEMENT OR THE TRANSACTIONS
CONTEMPLATED HEREBY.

     31.  Other Agreements.  THIS WRITTEN AGREEMENT REPRESENTS THE FINAL
AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR,
CONTEMPORANEOUS, OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES.  THERE ARE NO
UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES.

     32.  Financial Terms.  All accounting terms used in this Agreement which
are not specifically defined herein shall be construed in accordance with GAAP.

                                      -58-
<PAGE>

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

                              BORROWER:

                              THE WISER OIL COMPANY
                              a Delaware corporation


                              By:  /s/ LAWRENCE J. FINN
                                 -----------------------------------------------
                                    Lawrence J. Finn
                                    Vice President and Chief Financial Officer

                              BANKS:

                              BANK ONE, TEXAS, N.A.,
                              a national banking association


                              By:  /s/ MYNAN C. FELDMAN
                                 -----------------------------------------------
                                    Mynan C. Feldman
                                    Vice President

                              AGENT:

                              BANK ONE, TEXAS, N.A.,
                              a national banking association


                              By:  /s/ MYNAN C. FELDMAN
                                 -----------------------------------------------
                                    Mynan C. Feldman
                                    Vice President

                                      -59-

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM FORM 10-Q
JUNE 30, 1999 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL
STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000

<S>                             <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999             DEC-31-1999
<PERIOD-START>                             APR-01-1999             JAN-01-1999
<PERIOD-END>                               JUN-30-1999             JUN-30-1999
<CASH>                                          18,745                  18,745
<SECURITIES>                                         0                       0
<RECEIVABLES>                                    8,890                   8,890
<ALLOWANCES>                                         0                       0
<INVENTORY>                                        316                     316
<CURRENT-ASSETS>                                30,561                  30,561
<PP&E>                                         277,803                 277,803
<DEPRECIATION>                                 108,721                 108,721
<TOTAL-ASSETS>                                 203,274                 203,274
<CURRENT-LIABILITIES>                           11,338                  11,338
<BONDS>                                        124,989                 124,989
                                0                       0
                                          0                       0
<COMMON>                                        27,385                  27,385
<OTHER-SE>                                      39,201                  39,201
<TOTAL-LIABILITY-AND-EQUITY>                   203,274                 203,274
<SALES>                                         10,964                  22,569
<TOTAL-REVENUES>                                13,978                  25,849
<CGS>                                            4,532                  10,190
<TOTAL-COSTS>                                   11,435                  24,944
<OTHER-EXPENSES>                                     0                       0
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                               3,598                   7,004
<INCOME-PRETAX>                                 (1,005)                 (6,099)
<INCOME-TAX>                                         0                    (686)
<INCOME-CONTINUING>                             (1,005)                 (5,413)
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                    (1,055)                 (5,413)
<EPS-BASIC>                                       (.12)                   (.60)
<EPS-DILUTED>                                     (.12)                   (.60)


</TABLE>


© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission