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

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                              ____________________


                                   FORM 10-Q
(Mark one)

[X]  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
               For the quarterly period ended September 30, 1997

                                       OR

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

                         Commission file number 1-14344
                           __________________________


                          PATINA OIL & GAS CORPORATION
             (Exact name of registrant as specified in its charter)

             Delaware                                       75-2629477
    (State or other jurisdiction of                       (IRS Employer
    incorporation or organization)                      Identification No.)

           1625 Broadway
          Denver, Colorado                                      80202
   (Address of principal executive offices)                  (zip code)

       Registrant's telephone number, including area code (303) 389-3600

          Title of class                        Name of exchange on which listed
___________________________________________    ________________________________
     Common Stock, $.01 par value                  New York Stock Exchange
Convertible Preferred Stock, $.01 par value        New York Stock Exchange
       Common Stock Warrants                       New York Stock Exchange

          Securities registered pursuant to Section 12(g) of the Act:
                                     None


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

 There were 15,854,981 shares of common stock outstanding on October 27, 1997.

================================================================================
<PAGE>
 
PART I.  FINANCIAL INFORMATION

          Patina Oil & Gas Corporation (the "Company") was formed in early 1996
to hold  the assets and operations of Snyder Oil Corporation ("SOCO") in the
Wattenberg Field and to facilitate the acquisition of Gerrity Oil & Gas
Corporation ("GOG Acquisition").  The results of operations of the Company for
periods prior to the GOG Acquisition reflected in these financial statements
include only the historical results of SOCO's Wattenberg operations.

          The financial statements included herein have been prepared in
conformity with generally accepted accounting principles.  The statements are
unaudited but reflect all adjustments which, in the opinion of management, are
necessary to fairly present the Company's financial position and  results of
operations.

                                       2
<PAGE>
 
                          PATINA OIL & GAS CORPORATION

                          CONSOLIDATED BALANCE SHEETS
                                 (IN THOUSANDS)
<TABLE>
<CAPTION>
                                                            DECEMBER 31,    SEPTEMBER 30,
                                                                1996             1997
                                                            -------------   --------------
                                                                             (UNAUDITED)
<S>                                                         <C>             <C>
                                     ASSETS
Current assets
  Cash and equivalents                                         $   6,153        $   9,751
  Accounts receivable                                             19,977           13,017
  Inventory and other                                              1,457            3,162
                                                               ---------        ---------
                                                                  27,587           25,930
                                                               ---------        ---------
 
Oil and gas properties, successful efforts method                559,072          567,471
  Accumulated depletion, depreciation and amortization          (160,432)        (195,105)
                                                               ---------        ---------
                                                                 398,640          372,366
                                                               ---------        ---------
 
Gas facilities and other                                           6,421            5,261
  Accumulated depreciation                                        (4,917)          (3,684)
                                                               ---------        ---------
                                                                   1,504            1,577
                                                               ---------        ---------
 
Other assets, net                                                  2,502            1,541
                                                               ---------        ---------
                                                               $ 430,233        $ 401,414
                                                               =========        =========

                      LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities
  Accounts payable                                             $  15,063        $  19,901  
  Accrued liabilities                                             11,509            6,762  
                                                               ---------        ---------  
                                                                  26,572           26,663  
                                                               ---------        ---------  
                                                                                           
Senior debt                                                       94,500           72,000  
Subordinated notes                                               103,094           97,683  
Other noncurrent liabilities                                       9,831            7,372  
                                                                                           
Commitments and contingencies                                                              
                                                                                           
Stockholders' equity                                                                       
  Preferred stock, $.01 par, 5,000,000 shares                                              
       authorized, 1,593,608 and 1,467,926 shares issued                                   
       and outstanding                                                16               15  
  Common stock, $.01 par, 40,000,000 shares                                                
       authorized, 18,886,932 and 18,821,184 shares                                        
        issued and outstanding                                       189              188  
  Capital in excess of par value                                 194,066          189,629  
  Retained earning                                                 1,965            7,864  
                                                               ---------        ---------  
                                                                 196,236          197,696  
                                                               ---------        ---------  
                                                               $ 430,233        $ 401,414  
                                                               =========        =========   
</TABLE>

       The accompanying notes are an integral part of these statements.

                                       3
<PAGE>
 

                                PATINA OIL & GAS CORPORATION
   
                           CONSOLIDATED STATEMENTS OF OPERATIONS
                           (IN THOUSANDS EXCEPT PER SHARE DATA)

<TABLE> 
<CAPTION> 
                                                    THREE MONTHS          NINE MONTHS
                                                 ENDED SEPTEMBER 30,   ENDED SEPTEMBER 30,
                                                 -------------------  -------------------
                                                   1996       1997        1996      1997
                                                   ----       ----        ----      ----
                                                                 (UNAUDITED)
<S>                                             <C>        <C>         <C>        <C>
 
Revenues
  Oil and gas sales                             $22,729    $21,252     $52,546    $73,365
  Other                                             368        451         661        679
                                                -------    -------     -------    -------
 
                                                 23,097     21,703      53,207     74,044
                                                -------    -------     -------    -------
Expenses
  Direct operating                                4,161      4,185       9,562     13,507
  Exploration                                        18         58         167        121
  General and administrative                      1,547      1,186       4,661      3,797
  Interest and other                              4,808      3,988       9,787     12,473
  Depletion, depreciation and amortization       13,232     11,487      31,955     36,263
                                                -------    -------     -------    -------
Income (loss) before taxes                         (669)       799      (2,925)     7,883
                                                -------    -------     -------    -------
                                                                                         
Provision (benefit) for income taxes                                                     
  Current                                             -          -           -          -
  Deferred                                            -          -        (394)         -
                                                -------    -------     -------    -------
                                                      -          -        (394)         -
                                                -------    -------     -------    -------
                                                                                         
                                                                                         
Net income (loss)                               $  (669)   $   799     $(2,531)   $ 7,883
                                                =======    =======     =======    =======
                                                                                         
Net income (loss) per common share              $  (.07)   $   .01     $  (.23)   $   .31
                                                =======    =======     =======    =======
                                                                                         
Weighted average shares outstanding              19,866     18,901      17,271     18,908 
</TABLE>

       The accompanying notes are an integral part of these statements.

                                       4
<PAGE>




                                
                         PATINA OIL & GAS CORPORATION

                     CONSOLIDATED STATEMENTS OF CHANGES IN
                             STOCKHOLDERS' EQUITY
                                (IN THOUSANDS)

<TABLE>    
<CAPTION>   
                                              Preferred Stock           Common Stock        Capital                      Retained
                                           ---------------------   ---------------------    Excess of    Investment      Earnings
                                             Shares      Amount      Shares     Amount      Par Value     By Parent      (Deficit)
                                            -------     -------      ------    -------    -----------    ----------      ---------
<S>                                         <C>         <C>          <C>       <C>        <C>             <C>            <C> 
 
Balance, December 31, 1995                        -     $     -      14,000     $140         $      -     $ 113,523       $     -
 
Credit in lieu of taxes                           -           -           -        -                -           171             -
 
Change in investment by parent                    -           -           -        -                -        (7,514)            -
 
Net loss through the GOG Acquisition date         -           -           -        -                -          (532)            -
 
GOG Acquisition                               1,205          12       6,000       60          194,291      (105,648)            -
 
Issuance of common                                -           -           4        -               27             -             -
 
Repurchase of common and warrants                 -           -      (1,117)     (11)          (9,722)            -             -
 
Issuance of preferred                           389           4           -        -            9,470             -             -
 
Preferred dividends                               -           -           -        -                -             -        (2,129)
 
Net income subsequent to the
  GOG Acquisition                                 -           -           -        -                -             -         4,094
                                              -----     -------      ------     ----         --------     ---------       -------

Balance, December 31, 1996                    1,594          16      18,887      189          194,066             -         1,965

Issuance of common                                -           -           5        -               40             -             -
 
Repurchase of common and preferred              (126)        (1)        (71)      (1)          (4,477)            -             -
 
Preferred dividends                               -           -           -        -                -             -        (1,984)
 
Net income                                        -           -           -        -                -             -         7,883
                                              -----     -------      ------     ----         --------     ---------       -------   

Balance, September 30, 1997 (Unaudited)       1,468     $    15      18,821     $188         $189,629     $       -       $ 7,864
                                              =====     =======      ======     ====         ========     =========       =======
</TABLE>

       The accompanying notes are an integral part of these statements.

                                       5
<PAGE>
 
                          PATINA OIL & GAS CORPORATION

                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (IN THOUSANDS)
<TABLE>
<CAPTION>
                                                                      NINE MONTHS
                                                                   ENDED SEPTEMBER 30,
                                                                   ------------------
                                                                    1996         1997
                                                                   ------       -----
                                                                       (UNAUDITED)
<S>                                                                <C>         <C> 
 
Operating activities
  Net income (loss)                                                $ (2,531)   $  7,883
  Adjustments to reconcile net income (loss) to net
       cash provided by operations
          Exploration expense                                           167         121
          Depletion, depreciation and amortization                   31,955      36,263
          Deferred taxes                                               (394)          -
          Amortization of deferred credits                             (605)          -
          Gain on sale of oil and gas properties                          -        (338)
          Changes in current and other assets and liabilities
            Decrease in
               Accounts receivable                                    4,904       6,838
               Inventory and other                                      304          61
            Increase (decrease) in
               Accounts payable                                      (4,085)      4,715
               Accrued liabilities                                    1,428      (4,425)
               Other liabilities                                      2,357      (2,417)
                                                                   --------    --------
          Net cash provided by operations                            33,500      48,701
                                                                   --------    --------
 
Investing activities
  Acquisition, development and exploration                           (3,042)    (11,759)
  Other                                                              (2,019)          -
  Sale of oil and gas properties                                      1,111       1,030
                                                                   --------    --------
          Net cash used by investing                                 (3,950)    (10,729)
                                                                   --------    --------
 
Financing activities
  Decrease in debt to parent                                        (80,288)          -
  Increase (decrease) in indebtedness                                79,783     (27,911)
  Deferred credits                                                      814           -
  Change in investment by parent                                     (7,514)          -
  Cost of common stock issuance                                     (11,534)          -
  Repurchase of common and preferred stock                             (923)     (4,479)
  Preferred dividends                                                (1,419)     (1,984)
                                                                   --------    --------
 
          Net cash used by financing                                (21,081)    (34,374)
                                                                   --------    --------
 
Increase in cash                                                      8,469       3,598
Cash and equivalents, beginning of period                             1,000       6,153
                                                                   --------    --------
Cash and equivalents, end of period                                $  9,469    $  9,751
                                                                   ========    ========
</TABLE>
       The accompanying notes are an integral part of these statements.

                                       6
<PAGE>
 
                          PATINA OIL & GAS CORPORATION

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


(1)  ORGANIZATION AND NATURE OF BUSINESS

  Patina Oil & Gas Corporation (the "Company"), is an independent energy company
engaged in the acquisition, development, exploitation and production of oil and
natural gas in the Wattenberg field ("Wattenberg") of Colorado's Denver-
Julesburg Basin (the "D-J Basin").  The Company was formed in early 1996 to hold
the Wattenberg assets of Snyder Oil Corporation ("SOCO") and to facilitate the
acquisition of Gerrity Oil & Gas Corporation (the "GOG Acquisition"), in May
1996.

  The above transactions were accounted for as a purchase of GOG.  The amounts
and results of operations of the Company for periods prior to the GOG
Acquisition include the historical amounts and results of SOCO's Wattenberg
operations.  Certain amounts in the accompanying financial statements have been
allocated in a reasonable and consistent manner in order to depict the
historical financial position, results of operations and cash flows of the
Company on a stand-alone basis prior to the GOG Acquisition.

(2)  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Producing Activities

  The Company utilizes the successful efforts method of accounting for its oil
and gas properties.  Leasehold costs are capitalized when incurred.  Unproved
properties are assessed periodically within specific geographic areas and
impairments in value are charged to expense.  Exploratory expenses, including
geological and geophysical expenses and delay rentals, are charged to expense as
incurred.  Exploratory drilling costs are initially capitalized, but charged to
expense if and when the well is determined to be unsuccessful.  Costs of
productive wells, unsuccessful developmental wells and productive leases are
capitalized and amortized on a unit-of-production basis over the life of the
remaining proved or proved developed reserves, as applicable.  Gas is converted
to equivalent barrels at the rate of six Mcf to one barrel.  Amortization of
capitalized costs has generally been provided over the entire D-J Basin as the
wells are located in the same reservoir.  No accrual has been provided for
future abandonment costs as management estimates that salvage value will
approximate such costs.

  In 1995, the Company adopted Statement of Financial Accounting Standards No.
121 ("SFAS 121"), "Accounting for the Impairment of Long-Lived Assets."   SFAS
121 requires the Company to assess the need for an impairment of capitalized
costs of oil and gas properties on a field-by-field basis.  During the nine
months ended September 30, 1996 and 1997, the Company did not provide for any
impairments.  Changes in the underlying assumptions, including oil and gas
prices, or the amortization units could, however, result in impairments in the
future.

                                       7
<PAGE>
 
Other Assets

  Other assets reflect the value assigned to a noncompete agreement entered into
as part of the GOG Acquisition.  The value is being amortized over five years at
a rate intended to approximate the decline in the value of the agreement.
Amortization expense for the nine months ended September 30, 1996 and 1997 was
$1,603,000 and $1,333,000, respectively.  Scheduled amortization for the next
four years is $167,000 for the remainder of 1997, $500,000 in 1998, and $250,000
in each of 1999 and  2000.

Section 29 Tax Credits

  The Company from time to time enters into arrangements to monetize its Section
29 tax credits.  These arrangements result in revenue increases of approximately
$.40 per Mcf on production volumes from qualified Section 29 properties.  As a
result of such arrangements, the Company recognized additional gas revenues of
$1.2 million and $1.3 million during the nine months ended September 30, 1996
and 1997, respectively.  These arrangements are expected to increase revenues
through 2002.

Gas Imbalances

  The Company uses the sales method to account for gas imbalances.  Under this
method, revenue is recognized based on the cash received rather than the
Company's proportionate share of gas produced.  Gas imbalances at December 31,
1996 and September 30, 1997 were insignificant.

Financial Instruments

  The book value and estimated fair value of cash and equivalents was $6.2
million and $9.8 million at December 31, 1996 and September 30, 1997.  The book
value approximates fair value due to the short maturity of these instruments.
The book value and estimated fair value of the Company's  senior debt was $94.5
million and $72.0 million at December 31, 1996 and September 30, 1997.  The fair
value is presented at face value given its floating rate structure.  The book
value of the Senior Subordinated Notes ("Subordinated Notes" or "Notes")  was
$103.1 million and $97.7 million at December 31, 1996 and September 30, 1997 and
the estimated fair value was $105.6 million and $100.6 million at December 31,
1996 and September 30, 1997, respectively.  The fair value is estimated based on
the market price of the Notes on the New York Stock Exchange.

  From time to time, the Company hedges a portion of its physical oil and
natural gas production utilizing a variety of instruments, including fixed price
swaps and options and exchange-traded futures contracts and options thereon.
Gains and losses on such contracts are deferred and recognized in income as an
adjustment to oil and gas sales revenues in the period to which the contracts
relate.  The Company currently has approximately 50% of its projected natural
gas production and approximately 42% of its projected oil production hedged in
the fourth quarter of 1997 and approximately 33% of its projected gas production
and approximately 23% of the projected oil production hedged in the first
quarter of 1998.

  In 1997, the Company entered into various oil and gas hedging contracts.  The
Company recognized $19,000 of oil hedging gains and $1.7 million of gas hedging
gains related to these contracts based on settlements during the nine months
ended, September 30, 1997.  These gains were reflected as additions to oil and
gas revenues in the period settled.

                                       8
<PAGE>
 
Risks and Uncertainties

  Historically, the market for oil and gas has experienced significant price
fluctuations.  Prices for natural gas in the Rocky Mountain region have
traditionally been particularly volatile and have generally been depressed since
1994.  In large part, the decreased prices are the result of mild weather,
increased production in the region and limited transportation capacity to other
regions of the country.   Increases or decreases in prices received could have a
significant impact on the Company's future results of operations.

Other

  All liquid investments with an original maturity of three months or less are
considered to be cash equivalents.  Certain amounts in prior period consolidated
financial statements have been reclassified to conform with current
classification.

  All cash payments for income taxes were made by SOCO through May 2, 1996 at
which point the Company began paying its own taxes.  The Company was charged
interest by SOCO on its debt to SOCO of $1.6 million through May 2, 1996, which
was reflected as an increase in debt to SOCO.

  In the opinion of management, those adjustments to the financial statements
(all of which are of a normal and recurring nature) necessary to present fairly
the financial position and results of operations have been made.  These interim
financial statements should be read in conjunction with the Company's Annual
Report on Form 10-K for the year ended December 31, 1996.

                                       9
<PAGE>
 
(3)  OIL AND GAS PROPERTIES

  The cost of oil and gas properties at December 31, 1996 and September 30, 1997
includes approximately $7.0 million of proved undeveloped leasehold costs.
Acreage is generally held for exploration, development or resale and its value,
if any, is excluded from amortization.  The following table sets forth costs
incurred related to oil and gas properties.
<TABLE>
<CAPTION>
 
                                              NINE
                            YEAR ENDED    MONTHS ENDED
                           DECEMBER 31,   SEPTEMBER 30,
                               1996           1997
                           ------------   -------------
                                (IN THOUSANDS)
<S>                        <C>            <C>
                       
Acquisition                 $218,380       $   337
Development                    8,301        11,321
Exploration and other            224           121
                            --------       -------
                            $226,905       $11,779
                            ========       =======
</TABLE>

  In May 1996, the GOG Acquisition discussed in Note 1 was consummated.  The
following table summarizes the unaudited pro forma effects on the Company's
financial statements assuming that the GOG Acquisition and the Exchange Offer
had been consummated on January 1, 1996.  Future results may differ
substantially from pro forma results due to changes in these assumptions,
changes in oil and gas prices, production declines and other factors.
Therefore, pro forma statements cannot be considered indicative of future
operations.  The pro forma results for the nine months ended September 30, 1996
are as follows (in thousands, except per share data):
<TABLE>
<CAPTION>
 
<S>                                                           <C>
     Total revenues                                           $70,157
     Total expenses                                           $57,396
     Depletion, depreciation and amortization                 $40,607
     Net income (loss)                                        $(6,191)
     Net income (loss) per common share                       $  (.31)
     Weighted average shares outstanding                       19,943
</TABLE> 
 
(4)  INDEBTEDNESS
 
 The following indebtedness was outstanding on the respective dates:
 
<TABLE> 
<CAPTION> 
                         DECEMBER 31,       SEPTEMBER 30,
                            1996                1997
                         -----------        ------------
                                 (IN THOUSANDS)
<S>                       <C>                <C> 
 
  Bank facility           $ 94,500           $72,000
  Less current portion         -                 -
                          --------           -------
   Senior debt, net       $ 94,500           $72,000
                          ========           =======
 
  Subordinated notes      $103,094           $97,683
                          ========           =======
</TABLE>

                                       10
<PAGE>
 
  In April 1997, the Company entered into an amended  bank credit agreement (the
"Facility").  The Facility is a revolving credit facility in an aggregate amount
up to $140.0 million.  The amount available under the Facility is adjusted
semiannually and equaled $110.0 million at September 30, 1997, with $72.0
million outstanding under the revolving credit facility.

  The borrower may elect that all or a portion of the Facility bear interest at
a rate equal to: (i) the higher of (a) prime rate plus a margin equal to .25%
(the "Applicable Margin") or (b) the Federal Funds Effective Rate plus .5% plus
the Applicable Margin, or (ii) the rate at which Eurodollar deposits for one,
two, three or six months (as selected by the Company) are offered in the
interbank Eurodollar market plus a margin which fluctuates from .625% to 1.125%,
determined by a debt to EBITDA ratio.  During the nine months ended September
30, 1997, the average interest rate under the Facility approximated 6.8%.

  The bank credit agreement contains certain financial covenants, including but
not limited to, a maximum total debt to capitalization ratio, a maximum total
debt to EBITDA ratio and a minimum current ratio.  The bank credit agreement
also contains certain negative covenants, including but not limited to
restrictions on indebtedness; certain liens; guaranties, speculative derivatives
and other similar obligations; asset dispositions; dividends, loans and
advances; creation of subsidiaries; investments; leases; acquisitions; mergers;
changes in fiscal year; transactions with affiliates; changes in business
conducted; sale and leaseback and operating lease transactions; sale of
receivables; prepayment of other indebtedness; amendments to principal
documents; negative pledge clauses; issuance of securities; and non-speculative
commodity hedging.

  In conjunction with the GOG Acquisition, the Company assumed $100 million of
11.75% Senior Subordinated Notes due July 15, 2004 issued by GOG in 1994.  Under
purchase accounting, the Notes have been reflected in the accompanying financial
statements at a book value of 105.875% of their principal amount.  Interest is
payable each January 15 and July 15.  The Notes are redeemable at the option of
the Company, in whole or in part, at any time on or after July 15, 1999,
initially at 105.875% of their principal amount, declining to 102.938% on or
after July 15, 2000 and declining to 100% on or after July 15, 2001.  Upon  a
change of control, as defined in the Notes, the Company is obligated to make an
offer to purchase all outstanding Notes at a price of 101% of the principal
amount thereof.  In addition, the Company would be obligated, subject to certain
conditions, to make offers to purchase the Notes with the net cash proceeds of
certain asset sales or other dispositions of assets at a price of 101% of the
principal amount thereof.   Subsequent to the GOG Acquisition, the Company
repurchased and retired $7.7 million of the Notes, resulting in $92.3 million of
principal amount of Notes outstanding, or a book value of $97.7 million in the
accompanying financial statements.  The Notes are unsecured general obligations
of the Company and are subordinated to all senior indebtedness of the Company
and to any existing and future indebtedness of the Company's subsidiaries.

  The Notes contain covenants that, among other things, limit the ability of the
Company to incur additional indebtedness, pay dividends, engage in transactions
with shareholders and affiliates, create liens, sell assets, engage in mergers
and consolidations and make investments in unrestricted subsidiaries.
Specifically, the Notes restrict the Company from incurring indebtedness
(exclusive of the Notes) in excess of approximately $51 million, if after giving
effect to the incurrence of such additional indebtedness and the receipt and
application of the proceeds therefrom, the Company's interest coverage ratio is
less than 2.5:1 or adjusted consolidated net tangible assets is less than 150%
of the aggregate indebtedness of the Company.  The Company currently meets these
ratios and accordingly, is not limited in its ability to incur additional debt.

                                       11
<PAGE>
 
  Prior to the GOG Acquisition, SOCO financed all of the Company's activities.
A portion of such financing was considered to be an investment by parent in the
Company with the remaining portion being considered debt to parent.  The portion
considered to be debt to parent versus an investment by parent was a
discretionary percentage determined by SOCO after consideration of the Company's
internally generated cash flows and level of capital expenditures.  Subsequent
to the GOG Acquisition, the $75.0 million debt to parent was paid in full.

  On the portion of such financing which was considered to be debt to parent,
SOCO charged interest at a rate which approximated the average interest rate
being paid by SOCO under its revolving credit facility (6.9% for the four months
ended May 2, 1996).

  Scheduled maturities of indebtedness for the next five years are zero for the
remainder of 1997, 1998 and 1999, and  $72.0 million in 2000, and zero in 2001.
The long-term portions of the Facility are scheduled to expire in 2000; however,
it is management's intent to review both the short-term and long-term facilities
and extend the maturities on a regular basis.

  Cash payments for interest were $8.2 million and $15.5 million for the nine
months ended September 30, 1996 and 1997, respectively.


(5)  STOCKHOLDERS' EQUITY

  A total of 40.0 million common shares, $.01 par value, are authorized of which
18.8 million were issued and outstanding at September 30, 1997.   Of the 18.8
million shares outstanding, 2.0 million are designated as Series A Common Stock.
The Series A Common Stock is identical to the common shares except that the
Series A Common Stock is entitled to three votes per share rather than one vote
per share.  The Series A Common Stock is owned by SOCO and reverts to regular
common shares under certain conditions.  During the first nine months of 1997,
the Company repurchased 70,500 shares of common stock and 125,682 preferred
shares for $4.5 million.  No dividends have been paid on common stock as of
September 30, 1997.

  A total of 5.0 million preferred shares, $.01 par value, are authorized of
which 1.5 million were issued and outstanding at September 30, 1997.   The stock
is convertible into common stock at any time at $8.61 per share.  The 7.125%
preferred stock pays dividends, when declared by the Board of Directors, based
on an annual rate of $1.78 per share.  The preferred stock is redeemable at the
option of the Company at any time after May 2, 1998 if the average closing price
of the Company's  common stock for 20 of the 30 days prior to not less than five
days preceding the redemption date is greater than $12.92 per share, or at any
time after May 2, 1999.  The liquidation preference is $25 per share, plus
accrued and unpaid dividends.  The Company paid $2.0 million  ($.4453 per
preferred share per quarter) in preferred dividends during the nine months ended
September 30, 1997 and had accrued an additional $321,000 at September 30, 1997
for dividends.

  In 1996, the shareholders adopted a stock option plan for employees providing
for the issuance of options at prices not less than fair market value.  Options
to acquire up to three million shares of common stock may be outstanding at any
given time.  The specific terms of grant and exercise are determinable by a
committee of independent members of the Board of Directors.  A total of 512,000
options were issued in 1996 with an exercise price of $7.75 per common share and
271,000 options were issued in February 1997 with an exercise price of $9.25 per
common share.  The options vest over a three-year period (30%, 60%, 100%) and
expire five years from date of grant.

                                       12
<PAGE>
 
  In 1996, the shareholders adopted a stock grant and option plan ("Directors'
Plan") for non-employee Directors of the Company.  The Directors' Plan provides
for each non-employee Director to receive common shares having a market value
equal to $2,250 quarterly in payment of one-half their retainer.  A total of
3,632 shares were issued in 1996 and 3,012 shares were issued during the first
nine months of 1997.  It also provides for 5,000 options to be granted annually
to each non-employee Director.  A total of 20,000 options were issued in May
1996 with an exercise price of $7.75 per common share and 20,000 options were
issued in May 1997 with an exercise price of $8.625.  The options vest over a
three-year period (30%, 60%, 100%) and expire five years from date of grant.

  Earnings per share is computed by dividing net income, less dividends on
preferred stock, by weighted average common shares outstanding.  Net income
(loss) applicable to common for the nine months ended September 30, 1996 and
1997, was ($3,950,000) and $5,899,000, respectively.  Differences between
primary and fully diluted earnings per share were insignificant for all periods
presented.

(6)  FEDERAL INCOME TAXES

  Prior to the GOG Acquisition, the Company had been included in SOCO's tax
return.  Current and deferred income tax provisions allocated by SOCO were
determined as though the Company filed as an independent company, making the
same tax return elections used in SOCO's consolidated return.  Subsequent to the
GOG Acquisition, the Company will not be included in SOCO's tax return.

  A reconciliation of the statutory rate to the Company's effective rate as they
apply to the benefit for the nine months ended September 30, 1996 and 1997
follows:
<TABLE>
<CAPTION>                                    NINE MONTHS ENDED SEPTEMBER 30         
                                             ------------------------------        
                                                      1996     1997
                                                     ------   ------
<S>                                                  <C>      <C>
 
Federal statutory rate                                (35%)     35%
Utilization of net deferred tax asset                   -      (35%)
Tax benefit recognized prior to GOG Acquisition        18%       -
                                                      ----     ----
Effective income tax rate                             (17%)      -
                                                      ====     ====
 </TABLE>

          For tax purposes, the Company had regular net operating loss carry
forwards of $70.2 million and alternative minimum tax ("AMT") loss carry
forwards of $35.1 million at December 31, 1996.  Utilization of $31.9 million
regular net operating loss carry forwards and $31.6 million AMT loss carry
forwards will be limited to $5.2 million per year as a result of the merger of
GOG and SOCO Wattenberg Corporation on May 2, 1996.  These carry forwards expire
from 2006 through 2011.  At December 31, 1996, the Company had alternative
minimum tax credit carry forwards of $478,000 which are available indefinitely.
No cash payments were made by the Company for federal taxes during 1995 and
1996.  As discussed in Note 1, the accompanying financial statements include
certain Wattenberg operations previously owned directly by SOCO.  Accordingly,
certain operating losses generated by these properties were retained by SOCO.
In addition, certain taxable income generated by SOCO did not offset the
Company's net operating loss carryforwards.  Prior to the GOG Acquisition, the
effect of such items has been reflected as a charge or credit in lieu of taxes
in the Company's consolidated statement of changes in stockholders' equity.

                                       13
<PAGE>
 
(7)       MAJOR CUSTOMERS

          During the nine months ended September 30, 1996 and 1997, Duke Energy
accounted for 33% and 42%, Amoco Production Company accounted for 20% and 16%,
and Total Petroleum accounted for 12% and 8% of revenues, respectively.
Management believes that the loss of any individual purchaser would not have a
long-term material adverse impact on the financial position or results of
operations of the Company.


(8)       RELATED PARTY

          Prior to the GOG Acquisition, the Company did not have its own
employees.  Employees, certain office space and furniture, fixtures and
equipment were provided by SOCO.  SOCO allocated general and administrative
expenses to the Company based on its estimate of expenditures incurred on behalf
of the Company.  Subsequent to the GOG Acquisition, certain field,
administrative and executive employees of SOCO and GOG became employees of the
Company.  SOCO  continues to provide certain services to Patina under a
corporate services agreement.  During the nine months ended September 30, 1997,
the Company paid approximately $1.3 million to SOCO under the corporate services
agreement for office rent, administrative services and insurance.

(9)       COMMITMENTS AND CONTINGENCIES

          The Company leases office space and certain equipment under non-
cancelable operating leases.  Future minimum lease payments under such leases
approximate $500,000 per year from 1997 through 2001.

          The Company is a party to various lawsuits and other legal proceedings
incidental to its business, none of which are anticipated to have a material
adverse impact on its financial position or results of operations.

(10)      SUBSEQUENT EVENT

          On October 17, 1997 the common shareholders approved each of the
proposals required to effectuate a series of transactions which redistributed
SOCO's majority ownership of the Company.  The transactions included: (i) SOCO
sold 10 million common shares of its Patina stock in a secondary offering at
$9.875 per share, (ii) the Company repurchased and retired all remaining 4
million common shares from SOCO at $9.332 per share, (iii) the Company sold $40
million of 8.50% convertible preferred stock to certain institutional investors
and (iv) management purchased $3 million of common shares at $9.875 per share.
Excess proceeds were used to reduce bank debt.  Subsequent to the transaction,
the Company has 15.9 million shares of common stock outstanding and $76.7
million at liquidation value of convertible preferred stock outstanding. Pro
forma results for the nine month period ended, September 30, 1997, as if the
transactions occurred on January 1, 1997 are as follows:
<TABLE>
<CAPTION>
 
<S>                                                 <C>
Total revenues                                      $74,044
Total depletion, depreciation and amortization       36,263
Total expenses                                       67,213
Net income                                            6,831
Net income per share                                    .08
Weighted average shares outstanding                  15,942
</TABLE>

                                       14
<PAGE>
 
                         PATINA OIL & GAS CORPORATION
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS

RESULTS OF OPERATIONS

  In  May 1996, Gerrity Oil & Gas Corporation ("GOG") was acquired by  a wholly
owned subsidiary of the Company (the "GOG Acquisition").  This transaction was
accounted for as a purchase of GOG.  Accordingly, the results of operations
since the GOG Acquisition reflect the impact of the purchase.

  Three months ended September 30, 1997 compared to three months ended September
30, 1996.  Total revenues for the three month period ended September 30, 1997
decreased from $23.1 million to $21.7 million, representing a decrease of 6%
from the prior year period.  The revenue decrease was due to lower oil and gas
production.  Net income for the third quarter 1997 was $799,000 compared to a
net loss of $669,000 for the same period in 1996.  The increase in net income is
primarily attributed to decreased general and administrative expenses, interest
expense and depletion expenses, partially offset by lower oil and gas revenue.

  Oil and gas sales less direct operating expenses for the three months ended
September 30, 1997 were $17.1 million, an 8.0% decrease from the prior year
period.  Average daily production in the third quarter of 1997 was 4,946 barrels
and 71.4 MMcf (101.1 MMcfe), decreases of 11% and 5%, respectively.  The
decrease resulted from a decline in production due to the Company's limited
development schedule and expected initial declines on the large number of wells
drilled and completed in 1994 and early 1995.  In the future, a decrease in
production from existing oil and gas properties is expected unless development
activity is increased or acquisitions are consummated.  The decision to increase
development activity is heavily dependent on the prices being received for
production.

  Average oil prices decreased from $19.92 per barrel in the third quarter of
1996 to $18.69 in 1997.  Natural gas prices increased from $1.83 per Mcf in the
third quarter of 1996 to $1.94 in 1997.  The increase in natural gas prices was
primarily the result of the 20% increase in the average CIG index for the three
month period offset by lower natural gas liquid prices.  Direct operating
expenses increased to $.45 per Mcfe compared to $.42 in the prior year quarter.
The increase is primarily attributed to focusing more attention on enhancing
production through increased well workovers, additional field staff overtime and
the overall increase in production taxes as a result of higher natural gas
prices.

  General and administrative expenses, net of reimbursements, for the third
quarter 1997 were $1.2 million, a 23% decrease from the same period in 1996.
The decrease was due to efficiencies realized as a result of the GOG Acquisition
including reduced expenses for insurance, legal work and rent.

  Interest and other expense was $4.0 million compared to $4.8 million in the
third quarter of 1996.  Interest expense decreased as a result of lower average
outstanding debt levels.  The Company's average interest rate remained at
approximately 9.5% for each of the respective quarters.

  Depletion, depreciation and amortization expense for the third quarter of 1997
totalled $11.5 million, a decrease of $1.7 million or 13% from the same period
in 1996.  The decrease resulted primarily from lower oil and gas production and
lower amortization expense associated with a  noncompete agreement entered into
as  part of the GOG Acquisition.  Amortization of the noncompete agreement
totaled $167,000 in the third quarter of 1997 as compared to $963,000 in 1996.
The Company's depletion rate for the third quarter 1997 was $1.21 per Mcfe as
compared to $1.20 in 1996.

                                       15
<PAGE>
 
  Nine months ended September 30, 1997 compared to nine months ended September
30, 1996.  Total revenues for the nine month period ended September 30, 1997
increased to $74.0 million from $53.2 million, representing an  increase of 39%
from the prior year period.  The revenue increase was due to the higher
production associated with the GOG Acquisition and improved oil and gas prices.
Net income for the nine months ended September 30, 1997 was $7,883,000 compared
to a net loss of $2,531,000 for the same period in 1996.  The increase in net
income is primarily attributed to the increased revenue, partially offset by
increased interest expense and higher depletion, depreciation and amortization
expense.

  Oil and gas sales less direct operating expenses for the nine months ended
September 30, 1997 were $59.9 million, a 39% increase from the prior year
period.  Average daily production for  the nine months ended September 30, 1997
was 5,275 barrels and 74.2 MMcf (105.9 MMcfe), increases of 20% and 18%,
respectively.  The production increases resulted solely from the GOG
Acquisition.  Exclusive of the GOG Acquisition, production continued to decline
due to the Company's limited development schedule and expected initial declines
on the large number of wells drilled and completed in 1994 and early 1995. There
were seven wells placed on production in the first nine months of 1996 compared
to 22 wells in the first nine months of 1997.  In the future, a decrease in
production from existing oil and gas properties is expected unless development
activity is increased or acquisitions are consummated.  The decision to increase
development activity is heavily dependent on the prices being received for
production.

  Average oil prices increased from $19.71 per barrel for the nine months ended
September 30, 1996 to $19.78 in 1997.  Natural gas prices increased from $1.65
per Mcf for the nine months ended September 30, 1996 to $2.21 in 1997.  The
increase in natural gas prices was primarily the result of the 63% increase in
the average CIG index for the nine month period offset by lower natural gas
liquid prices.  Direct operating expenses increased to $.47 per Mcfe compared to
$.39 in the prior year period.  The increase is primarily attributed to focusing
more attention on enhancing production through increased well workovers,
additional field staff overtime and the overall increase in production taxes as
a result of higher oil and gas prices.

  General and administrative expenses, net of reimbursements, for the nine
months ended September 30, 1997 totaled $3.8 million, a 19% decrease from the
same period in 1996.   Prior to the GOG Acquisition, the Company did not have
its own employees.  Employees and certain office space and furniture, fixtures
and equipment were provided by SOCO.  SOCO allocated general and administrative
expenses based on estimates of expenditures incurred on behalf of the Company.
The decrease was due to efficiencies realized as a result of the GOG Acquisition
including reduced expenses for insurance, legal work and rent.


  Interest and other expense was $12.5 million compared to $9.8 million for the
nine months ended September 30, 1996.  Interest expense increased as a result of
higher average outstanding debt levels due to additional debt recorded as a
result of the GOG Acquisition.  The Company's average interest rate was 9.5%
compared to 9.3% in the prior year period. This increase is due primarily to the
Subordinated Notes.

  Depletion, depreciation and amortization expense for the nine months ended
September 30, 1997 totaled $36.3 million, an increase of $4.3 million or 13%
from the same period in 1996.  The increase resulted from higher oil and gas
production as a result of the GOG Acquisition, partially offset by a decreased
depletion, depreciation and amortization rate of $1.26 per Mcfe compared to
$1.31 in 1996.  The decreased rate was attributed to  a decrease in the
depletion rate from $1.22 per Mcfe in 1996 to $1.20 in 1997 and  $1,333,000 of
amortization, related to a noncompete agreement entered into as part of the GOG
Acquisition during the nine months ended September 30, 1997 as compared to
$1,603,000 in 1996.

                                       16
<PAGE>
 
DEVELOPMENT, ACQUISITION AND EXPLORATION

  During the nine months ended September 30, 1997, the Company incurred $11.8
million in capital expenditures, as the Company has begun to increase its
development activity based on recent results of the capital expenditure program
and improved Rocky Mountain natural gas prices.  The Company anticipates
incurring development capital expenditures of approximately $4.2 million during
the remaining three months of 1997.

FINANCIAL CONDITION AND CAPITAL RESOURCES

  At September 30, 1997, the Company had total assets of $401.4 million.  Total
capitalization was $367.4 million, of which 54% was represented by stockholders'
equity, 20% by senior debt and 26% by subordinated debt.  During the nine months
ended September 30, 1997, net cash provided by operations was $48.7 million, as
compared to $33.5 million for the same period in 1996.  As of September 30,
1997, there were no significant commitments for capital expenditures.  The
Company anticipates that 1997 expenditures for development drilling and
recompletion activity will be approximately $16.0 million, which will allow for
a reduction of indebtedness or provide funds to pursue acquisitions.  The level
of these and other future expenditures is largely discretionary, and the amount
of funds devoted to any particular activity may increase or decrease
significantly, depending on available opportunities and market conditions.  The
Company plans to finance its ongoing development, acquisition and exploration
expenditures using internal cash flow, proceeds from asset sales and its bank
credit facilities.  In addition, joint ventures or future public and private
offerings of debt or equity securities may be utilized.

  Prior to the GOG Acquisition, SOCO financed all of the Company's activities.
A portion of such financing was considered to be an investment by parent in the
Company with the remaining portion being considered debt payable to SOCO.  In
conjunction with the GOG Acquisition, the $75.0 million debt to SOCO was paid in
full.

  In April 1997, the Company entered into an amended bank credit agreement (the
"Facility").   The Facility is a revolving credit facility in an aggregate
amount up to $140.0 million.  The amount available under the Facility is
adjusted semiannually and equaled $110.0 million at September 30, 1997, with
$72.0 million outstanding under the Facility.
 
  As of October 27, 1997, the Company had approximately $149.7 million of debt
outstanding, consisting of $52.0 million of senior debt and $97.7 million of
Subordinated Notes.

  The bank credit agreement contains certain financial covenants, including but
not limited to a maximum total debt to capitalization ratio, a maximum total
debt to EBITDA ratio and a minimum current ratio and various other negative
covenants that could limit the Company's ability to incur other debt, dispose of
assets, pay dividends or repurchase securities.  Borrowings under the Facility
mature in 2000, but may be prepaid at anytime.  The Company has periodically
renegotiated its loan agreement to extend the Facility; however, there is no
assurance the Company will continue to do so in the future.

  The Company from time to time enters into arrangements to monetize its Section
29 tax credits.  These arrangements result in revenue increases of approximately
$.40 per Mcf on production volumes from qualified Section 29 properties.  As a
result of such arrangements, the Company recognized additional gas revenues of
$1.2 million and $1.3 million during the nine months ended September 30, 1996
and 1997, respectively.  These arrangements are expected to increase revenues
through 2002.

  The Company believes that its capital resources are adequate to meet the
current requirements of its business.  However, future cash flows are subject to
a number of variables including the level of production 

                                       17
<PAGE>
 
and oil and gas prices, and there can be no assurance that operations and other
capital resources will provide cash in sufficient amounts to maintain planned
levels of capital expenditures or that significant increases in capital
expenditures related to acquisitions and active development, recompletion and
exploitation, will not be undertaken.

INFLATION AND CHANGES IN PRICES

  While certain of its costs are affected by the general level of inflation,
factors unique to the oil and gas industry result in independent price
fluctuations.  Over the past five years, significant fluctuations have occurred
in oil and gas prices.  Although it is particularly difficult to estimate future
prices of oil and gas, price fluctuations have had, and will continue to have, a
material effect on the Company.

  The following table indicates the average oil and gas prices received over the
last five years and highlights the price fluctuations by quarter for 1996 and
1997.  Average price computations exclude hedging gains or losses and other
nonrecurring items to provide comparability.  Average prices per equivalent Mcf
indicate the composite impact of changes in oil and gas prices.  Oil production
is converted to natural gas equivalents at the rate of one barrel per six Mcf.
<TABLE>
<CAPTION>
                                Average Prices
                    ---------------------------------
                                   Natural
                    Crude Oil        Gas         Mcfe
                    ---------      -------       ----
                    (Per Bbl)     (Per Mcf)
<S>                 <C>            <C>           <C>
     Annual
     ------
     1992              $19.06      $1.82         $2.19
     1993               15.87       2.08          2.22
     1994               14.84       1.70          1.94
     1995               16.43       1.34          1.73
     1996               20.47       1.99          2.41
 
     Quarterly
     --------- 
     1996
     ----
     First             $18.31      $1.55         $1.96
     Second             20.24       1.60          2.13
     Third              19.92       1.83          2.29
     Fourth             22.35       2.78          3.07
      1997
     ----
     First             $21.79      $2.63         $2.93
     Second             19.09       1.85          2.26
     Third              18.69       1.94          2.28
</TABLE>
                                       18
<PAGE>
 
PART II.  OTHER INFORMATION

Item 4.  Submission of Matters to a Vote of Security Holders
         ---------------------------------------------------

         On October 17, 1997 a Special Meeting of the Company's common
         stockholders was held. A summary of the proposals upon which a vote was
         taken and the results of the voting follows.

<TABLE> 
<CAPTION> 
        
                                                                      COMMON STOCK                  SERIES A COMMON STOCK
                                                                 NUMBER OF SHARES VOTED             NUMBER OF SHARES VOTED
                                                                FOR     AGAINST     ABSTAIN        FOR     AGAINST     ABSTAIN
                                                                ---     -------     -------        ---     -------     -------
<S>                                                       <C>            <C>         <C>         <C>         <C>         <C> 
PROPOSALS
---------

1) Approval of a Secondary Offering of                    14,616,752     48,603      32,082      2,000,000   ---         ---
   10,000,000 shares of the common stock
   of the Company owned by Snyder Oil
   Corporation ("SOCO") (11,500,000
   shares if the underwriters' overallot-
   ment option is fully exercised or such
   greater or lesser number as the
   underwriters, the Company and SOCO
   may agree to include in the Secondary
   Offering).
 
2) Approval of the repurchase by the                      14,611,353     49,563      36,521      2,000,000   ---         ---
   Company of all remaining shares of
   the common stock of the Company
   owned by SOCO that are not sold in
   the Secondary Offering (other than
   70,000 such shares which SOCO
   agreed to deliver to the investors in
   the Company's New 8.5% Convertible
   Preferred Stock ("New Preferred
   Stock")).

3) Approval of the New Preferred Stock                    14,426,338     235,196     35,903      2,000,000   ---         ---
   issuance by the Company to a limited
   number of investors of between
   1,600,000 and 2,520,000 shares (as
   determined by a Company in its sole
   discretion) of the Company's New
   Preferred Stock, including the related
   issuance by the Company to such
   investors of 160,000 shares of
   common stock.
</TABLE> 

                                       19
<PAGE>
 
<TABLE> 
<CAPTION> 


                                                                      COMMON STOCK                  SERIES A COMMON STOCK
                                                                 NUMBER OF SHARES VOTED             NUMBER OF SHARES VOTED
                                                                FOR     AGAINST    ABSTAIN         FOR     AGAINST    ABSTAIN
                                                                ---     -------    -------         ---     -------    -------
<S>                                                       <C>            <C>         <C>         <C>         <C>         <C> 
4) Approval of the management stock                       14,508,238     146,365     42,834      2,000,000   ---         ---
   issuance providing for the issuance
   and sale by the Company to manage-
   ment investors of $3 million of
   common stock and the grant of
   150,000 shares of restricted common
   stock to the management investors
   (other than Thomas J. Edelman, the
   Chairman and President of the
   Company), and the grant of 350,000
   shares of restricted common stock
   to Mr. Edelman as consideration for
   his efforts in structuring and arranging
   the private placement of the New
   Preferred Stock.
</TABLE> 

ITEM 6.  EXHIBITS AND REPORTS ON FORM 8-K


(a)  Exhibits -

EXHIBIT NO.             DESCRIPTION
----------              -----------

   1.          -        Underwriting Agreement dated October 15, 1997 by and
                        among the Company, Smith Barney Inc., Morgan Stanley &
                        Co. Incorporated, as Representatives of the Several
                        Underwriters, and Snyder Oil Corporation./1/
 
   10.1.8               Second Amendment to Amended and Restated Credit
                        Agreement dated as of September 15, 1997 by and amound
                        the Company and Texas Commerce Bank National
                        Association, as Administrative Agent, NationsBank of
                        Texas, N.A., as Documentary Agent, Wells Fargo Bank,
                        N.A., CIBI, Inc. and Credit Lyonnais New York Brance, as
                        Co-Agents and the financial institrtuions a party to the
                        Credit Agreement./1/
                         
   10.5                 Stock Purchase Agreement dated as of July 31, 1997 by
                        and among the Company and the Investors named therein as
                        amended on September 19, 1997./1/

   10.6        -        Share Repurchase Agreement dated as of July 31, 1997 by
                        and between the Company and Snyder Oil Corporation/1/ as
                        amended and restated on September 19, 1997* and as
                        amended as of October 15, 1997* and amended by letter
                        agreement dated October 21, 1997.*
 
   10.7        -        Employment Agreement dated July 31, 1997 by and between
                        the Company and Thomas J. Edelman./1/

                                       20
<PAGE>
 
10.8          -         Management Stock Purchase Agreement dated as of
                        September 4, 1997 by and among the Company and certain
                        Management Investors./1/

10.9          -         Restricted Stock Agreement dated as of September 4, 1997
                        by and among the Company and certain Management
                        Investors./1/
 
10.10         -         Transition Agreement dated as of October 21, 1997 by and
                        between the Company and Snyder Oil Corporation./1/
 
27.           -         Financial Data Schedule.*
___________________

       /1/Incorporated herein by reference to the Exhibits to the Company's
Amendment No. 3 to Form S-3 as filed with the Securities Exchange Commission on
October 10, 1997. (Registration No. 333-32671)

       *Filed herewith.


(b)  No reports on Form 8-K were filed by Registrant during the quarter ended
     September 30, 1997.

                                       21
<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.



                                        PATINA OIL & GAS CORPORATION



                                    By  /s/ David J. Kornder
                                        ---------------------------------------
                                        David J. Kornder, Vice President and
                                        Chief Financial Officer

October 28, 1997

                                       22