Exhibit 99.1

                       PRO FORMA FINANCIAL INFORMATION OF
                          PATINA OIL & GAS CORPORATION


      On May 2, 1996,  the Company was merged (the  "Merger") with Gerrity Oil &
Gas  Corporation  ("GOG").  Related to the  Merger,  the  Company  commenced  an
Exchange  Offer to exchange the Company's  preferred  stock for GOG's  preferred
stock.  The  following  tables  summarize the unaudited pro forma effects on the
Company's  financial  statements assuming that the Merger and the Exchange Offer
had been  consummated  on March 31, 1996 (for balance sheet data) and January 1,
1995 and 1996 (for statement of operations  data).  These  transactions  will be
accounted  for as a purchase of GOG. The pro forma effects of the Merger and the
Exchange  Offer are based on  assumptions  set at the time of the  filing of the
Company's  registration  statement  declared  effective  by the  Securities  and
Exchange Commission.  These assumptions have not been updated to reflect certain
aspects of the  transactions  which were not known  until or  subsequent  to the
occurrence of the transactions.  The pro forma condensed  consolidated financial
statements should be read in conjunction with the related  historical  financial
statements included in the Company's registration statement and in the Company's
Quarterly  Report on Form 10-Q for the  quarterly  period  ended March 31, 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.









                             UNAUDITED PRO FORMA CONDENSED CONSOLIDATED BALANCE SHEET
                                                  March 31, 1996
                                                  (In thousands)


                                                                       GOG            Pro Forma         Unaudited
                                                      Historical    Historical       Adjustments        Pro Forma
                                                      ----------    ----------      ------------        ---------       
                                                      ASSETS

                                                                                                     
   Current assets                                      $   9,498     $  15,308       $                  $  24,806
   Oil and gas properties and equipment, net             208,157       293,630         (83,754) (a)       418,033
   Other noncurrent assets                                   728         6,480          (1,458) (a)         5,750
                                                       ---------     ---------                          ---------
                                                       $ 218,383     $ 315,418                          $ 448,589
                                                       =========     =========                          =========

                                       LIABILITIES AND STOCKHOLDERS' EQUITY

   Current liabilities                                 $   9,498     $  18,689       $  (5,104) (b)     $  20,583
                                                                                        (2,500) (c)
   Deferred taxes and other                               25,168        19,058         (34,225) (a)        10,001
   Debt to parent                                         75,000          -            (75,000) (b)          -
   Long-term debt                                           -          117,500          15,884  (a)       215,988
                                                                                        80,104  (b)
                                                                                         2,500  (c)
   Preferred stock of subsidiary                            -             -             13,333  (a)        13,333
   Stockholders' equity
      Preferred stock, $.01 par                             -                4               7  (a)            11
      Common stock, $.01 par                                 140           138             (78) (a)           200
      Capital in excess of par value                        -          160,524         (80,628) (a)       188,473
                                                                                       108,577  (d)
      Investment by parent                               108,577          -           (108,577) (d)          -
      Retained earnings (deficit)                           -             (495)            495  (a)          -
                                                       ---------     ---------                          ---------
                                                         108,717       160,171                            188,684
                                                       ---------     ---------                          ---------
                                                       $ 218,383     $ 315,418                          $ 448,589
                                                       =========     =========                          =========











                        UNAUDITED PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS
                                      For the Year Ended  December  31, 1995
                                      (In  thousands, except per share data)


                                                                       GOG           Pro Forma          Unaudited
                                                      Historical    Historical      Adjustments         Pro Forma
                                                      ----------    ----------      -----------         ---------   
                                                                                              
Revenues
   Oil and gas sales                                   $  50,073     $  51,513      $                   $ 101,586
   Other                                                      29         2,347                              2,376
                                                       ---------     ---------                          ---------
                                                          50,102        53,860                            103,962
                                                       ---------     ---------                          ---------

Expenses
   Direct operating                                        8,867         8,366           1,575  (e)        18,308
                                                                                          (500) (f)
   Exploration                                               416           285                                701
   General and administrative                              5,974         7,731          (4,705) (f)         7,425
                                                                                        (1,575) (e)
   Interest and other                                      5,476        14,505          (1,049) (g)        18,932
   Depletion, depreciation and amortization               32,591        30,333          (7,054) (h)        55,870
   Restructuring expenses                                   -              828                                828
                                                       ---------     ---------                          ---------
                                                          53,324        62,048                            102,064
                                                       ---------     ---------                          ---------

Income (loss) before taxes and dividends on
   preferred stock of subsidiary                          (3,222)       (8,188)                             1,898
Provision for (benefit from) income taxes                 (1,128)         (215)          2,007  (i)           664
Dividends on preferred stock of subsidiary                  -             -              1,518  (j)         1,518
                                                       ---------     ---------                          ---------

Net loss                                                  (2,094)       (7,973)                              (284)

Dividends on preferred stock                                -            4,554          (2,654) (j)         1,900
                                                       ---------     ---------                          ---------

Net loss applicable to common stock                    $  (2,094)    $ (12,527)                         $  (2,184)
                                                       =========     =========                          =========

Net loss per share                                     $    (.15)                                       $    (.11)
                                                       =========                                        =========

Weighted average shares outstanding                       14,000                                           20,000
                                                       =========                                        =========










                        UNAUDITED PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS
                                     For the Three Months Ended March 31, 1996
                                     (In thousands, except per share data)


                                                                       GOG           Pro Forma          Unaudited
                                                      Historical    Historical      Adjustments         Pro Forma
                                                      ----------    ----------      -----------         ---------
                                                                                            
Revenues
   Oil and gas sales                                   $  10,634     $  12,154      $                   $  22,788
   Other                                                      20           313                                333
                                                       ---------     ---------                          ---------
                                                          10,654        12,467                             23,121
                                                       ---------     ---------                          ---------

Expenses
   Direct operating                                        1,955         2,030             394  (e)         4,254
                                                                                          (125) (f)
   Exploration                                                68            59                                127
   General and administrative                              1,543         1,678            (964) (f)         1,863
                                                                                          (394) (e)
   Interest and other                                      1,247         3,408            (166) (g)         4,489
   Depletion, depreciation and amortization                6,967         6,677          (1,123) (h)        12,521
                                                       ---------     ---------                          ---------
                                                          11,780        13,852                             23,254
                                                       ---------     ---------                          ---------

Loss before taxes and dividends on
   preferred stock of subsidiary                          (1,126)       (1,385)                              (133)
Benefit from income taxes                                   (394)         (470)            817  (i)           (47)
Dividends on preferred stock of subsidiary                  -             -                380  (j)           380
                                                       ---------     ---------                          ---------

Net loss                                                    (732)         (915)                              (466)

Dividends on preferred stock                                -            1,139            (664) (j)           475
                                                       ---------     ---------                          ---------

Net loss applicable to common stock                    $    (732)    $  (2,054)                         $    (941)
                                                       =========     =========                          =========

Net loss per share                                     $    (.05)                                       $    (.05)
                                                       =========                                        =========

Weighted average shares outstanding                       14,000                                           20,000
                                                       =========                                        =========


     The  preceding  unaudited  pro  forma  condensed   consolidated   financial
statements reflect the adjustments described below:

Balance Sheet

     (a) To reflect the acquisition of GOG,  including the issuance of 6,000,000
shares of Common Stock,  3,000,000 Warrants, a warrant to be issued to the prior
chief  executive  of GOG  exercisable  for 500,000  shares of Common  Stock (the
"Executive  Warrant") and 1,066,667  shares of Preferred  Stock  (reflecting the
estimated  exchange of  two-thirds of the GOG  Preferred  Stock  pursuant to the
Exchange  Offer) at  estimated  fair  value  including  transaction  costs.  The
estimated fair value of the common stock issued was based on an assumed  trading
price of $8 per share of Common Stock.  The trading price was estimated based on
various  factors,  including the trading price of GOG's Common Stock and trading
multiples of comparable public companies. The fair value of the Warrants and the
Executive   Warrant   were   estimated  to  be  $1.75  and  $2.50  per  warrant,
respectively,  based  primarily on a range  calculated  using the  Black-Scholes
options  model.  The Preferred  Stock was valued at  $26,667,000  reflecting the
exchange of two-thirds of the GOG Preferred Stock at the liquidation  preference
of the newly issued  shares.  The GOG Preferred  Stock was valued at $13,333,000
which was estimated  based on the trading price of GOG's  Preferred  Stock.  For
each additional 10% of GOG Preferred Stock exchanged,  pro forma preferred stock
of subsidiary would






decrease $4,000,000, preferred stock, $.01 par would increase $1,600 and capital
in excess of par value would  increase  $3,998,400.  No trading market or market
price existed for the Common Stock,  Warrants,  Executive Warrant,  or Preferred
Stock prior to the Merger.

     On a pro forma basis,  the Company is expected to have the following equity
instruments  outstanding upon  consummation of the Merger and the Exchange Offer
(other than shares owned by the Company or GOG):



                                                            Shares/Warrants
                                                              Outstanding
                                                            ---------------
                                                                   
          Common Stock                                         20,000,000
          Preferred Stock                                       1,066,667
          Warrants                                              3,000,000
          Executive Warrant                                       500,000


     In  addition,   GOG  will  have  outstanding  1,012,000  Depository  Shares
representing interests in GOG Preferred Stock.

     (b) To reflect the  repayment of the payable to parent  through  borrowings
under the Company's credit facility.

     (c) To reflect  the  refinancing  of GOG's  current  maturities  of debt to
long-term debt through borrowings under the Company's credit facility.

     (d) To reclassify  the Company's  investment by parent to capital in excess
of par value to reflect the Company's new capital structure.

Statement of Operations

     (e) To  conform  the  financial  statement  presentation  by GOG of various
overhead charges and recoveries to a basis consistent with that of the Company.

     (f)  To  reflect  the  reduction  in  direct   operating  and  general  and
administrative expenses that result from the elimination of redundant personnel,
lease  space and other  corporate  services.  Under the  Merger  Agreement,  the
Company and SOCO have entered into a Corporate  Services  Agreement  under which
SOCO will  provide  certain  services to the Company so that it will not need to
have  these  tasks   performed  by  the  Company's   employees.   Administrative
efficiencies  from combining  headquarters  and field operations and eliminating
duplicate executive,  professional and administrative  personnel are expected to
total approximately $4.7 million per year. Based upon a detailed analysis of the
expenses and personnel that will be required to provide such services  following
the GOG Merger,  management has estimated that future annual  recurring  general
and  administrative  expenses  will  approximate  $5.0 million per year,  net of
reimbursements.

     (g) To adjust interest expense to reflect the refinancing or payment of (i)
$33.3 million (or 33.3%) of GOG's 11.75% Senior  subordinated  Notes, (ii) GOG's
bank  borrowings  under the terms of the Company's  credit  facility,  (iii) the
payable to parent and (iv) transaction  costs. The interest expense reflects the
Eurodollar Margin set forth in the credit  facilities,  which margin was applied
to the  current  Eurodollar  Rate  resulting  in an  average  borrowing  rate of
approximately  6.75%. Under the terms of GOG's Senior Subordinated Notes, GOG is
obligated to purchase  any notes put to GOG at a price of 101% of the  principal
amount thereof upon certain asset sales or  dispositions.  For each  $10,000,000
change in the amount of Notes refinanced, pro forma interest expense, net income
and earnings  per share would  change by $475,000,  $308,000 and $0.02 per share
for the year ended  December 31, 1995 and  $119,000,  $77,000 and zero per share
for the three months ended March 31, 1996. The net decrease in interest  expense
is  attributable to the lower interest rate relating to the bank borrowings used
to refinance  GOG's  Senior  Subordinated  Notes,  as  described  above,  offset
somewhat by the increased debt level.







     (h) To  adjust  depletion,  depreciation  and  amortization  of oil and gas
properties  based on the purchase price  allocated to GOG oil and gas properties
and the use of a combined  depletion,  depreciation and  amortization  rate. The
combined rate utilized for 1995 was $5.73 per BOE reflecting a rate of $5.65 per
BOE for the first nine months  (based on reserve  quantities  as of December 31,
1994) and $6.02 per BOE for the last three months  (based on reserve  quantities
as of December 31, 1995). The rate utilized for the three months ended March 31,
1996 was $6.32 per BOE based on reserve quantities as of December 31, 1995.

     (i) To record  the  estimated  provision  for income  taxes to reflect  the
anticipated effective income tax rate of the combined entity after the Merger.

     (j) To  reduce  dividends  paid  on GOG  Preferred  Stock  (reflecting  the
estimated  exchange of  two-thirds of the GOG  Preferred  Stock  pursuant to the
Exchange  Offer) and  reclassify  dividends  paid on the  remaining  outstanding
shares of GOG Preferred  Stock.  For each  additional 10% of GOG Preferred Stock
exchanged,  pro forma dividends on preferred stock of subsidiary  would decrease
and net income  would  increase  $455,000 and  $114,000,  dividends on preferred
stock  would  increase  $285,000  and  $71,000  and net income  per share  would
increase $.01 and zero for the year ended December 31, 1995 and the three months
ended March 31, 1996, respectively.