PRESS RELEASE       Contact:    Carrizo Oil & Gas, Inc.
                                B. Allen Connell, Director of Investor Relations
                                Paul F. Boling, Chief Financial Officer
                               (281) 496-1352

CARRIZO OIL & GAS,  INC.  ANNOUNCES  FOURTH  QUARTER  AND ANNUAL 2003  FINANCIAL
RESULTS; ANNUAL PRODUCTION, REVENUES AND EBITDA REACH RECORD LEVELS

HOUSTON,  March 25, 2004 - Carrizo Oil & Gas, Inc. (Nasdaq: CRZO) today reported
the Company's  financial  results for the fourth quarter and year ended December
31, 2003.

Fourth Quarter 2003 Results --

The fourth quarter 2003 results included the following highlights:

  o   Production of 1.9 Bcfe.

  o   Oil and gas revenue of $8.9 million.

  o   Net income available to common shareholders of $0.8 million.

  o   EBITDA of $5.9 million.

Revenues for the three months ended  December 31, 2003 decreased four percent to
$8.9 million as compared to $9.2 million  during the quarter ended  December 31,
2002.  The  decreased  level of revenues  was driven  primarily  by a 12 percent
decrease in production partially offset by higher prevailing oil and natural gas
prices.  Production volumes during the three months ended December 31, 2003 were
1.9 Bcfe as compared to 2.1 Bcfe  during the fourth  quarter of 2002.  Carrizo's
average oil sales price  increased  one percent to $28.17 per barrel from $27.93
per barrel  during the fourth  quarter of 2002,  while the  average  natural gas
sales price  increased 14 percent to $4.83 per Mcf from $4.24 per Mcf. The above
prices include the effects of hedging activities.

After  dividends  and  accretion  of discount on  preferred  stock,  the Company
reported  net income of $0.8  million,  or $0.06 and $0.05 per basic and diluted
share,  respectively,  for the three months ended December 31, 2003, as compared
to $2.2 million,  or $0.16 and $0.14 per basic and diluted share,  respectively,
for the same quarter during 2002.

EBITDA  (earnings  before  interest,  income tax,  depreciation and amortization
expenses,  and certain other  non-cash  items) during the fourth quarter of 2003
decreased to $5.9 million, or $0.40 and $0.34 per basic and fully diluted share,
respectively,  as  compared  to $7.0  million,  or $0.49 and $0.43 per basic and
fully  diluted  share,  respectively,  during  the fourth  quarter of 2002.




The decrease in EBITDA was due mainly to the decrease in revenues and  increases
in lease operating and general and administrative costs.

Oil and gas operating expenses,  including  production taxes,  increased to $1.7
million  during the three  months  ended  December  31, 2003 as compared to $1.2
million during the fourth quarter of 2002, due to higher  production taxes, as a
result of higher oil and gas prices,  and the  incremental  cost of operating an
increased number of wells.

Depreciation,  depletion and  amortization  expenses  ("DD&A") were $3.1 million
($1.69 per Mcfe) during the three months ended  December 31, 2003 as compared to
$3.2  million  ($1.55 per Mcfe) during the fourth  quarter of 2002.  The rise in
DD&A per Mcfe was primarily due to an increase in the proved  property cost base
from  exploration  and  development  drilling  and  transfers  of cost  from the
unproved property pool.

General and administrative expenses ("G&A") increased to $1.4 million during the
three months ended  December 31, 2003 from $1.1 million  during the same quarter
of 2002.  The  increase in G&A was due  primarily to  non-recurring  charges for
legal and  professional  fees and  printing  costs in  connection  with  certain
special projects.

By year-end 2003, Pinnacle Gas Resources,  Inc.  ("Pinnacle"),  a minority-owned
subsidiary  formed on June 23, 2003,  had drilled 124 gross wells in its coalbed
methane  play in Wyoming.  A majority  of these wells were in various  stages of
completion,  or were dewatering at year-end and,  accordingly,  operating losses
during the early months of Pinnacle's  development  program were expected.  As a
result, using the equity method of accounting, Carrizo recorded a charge of $0.7
million  (after  tax),  or $0.04 and $0.04  per basic and fully  diluted  share,
respectively, during the three months ended December 31, 2003 in connection with
Carrizo's equity ownership in Pinnacle's financial results for the period.

Results for the Year Ended December 31, 2003 --

The full year 2003 results included the following highlights:

  o  Record production of 7.5 Bcfe

  o  Record revenues of $38.5 million.

  o  Net income available to common shareholders of $7.2 million.

  o  Record EBITDA of $25.7 million.

Production  volumes  during the year ended  December  31, 2003  reached a record
level of 7.5 Bcfe as  compared to 7.2 Bcfe during  2002.  Revenues  for the year
ended December 31, 2003 were a record $38.5 million as compared to $26.8 million
during the year ended December 31, 2002  primarily due to a 39 percent  increase
in the average  sales  price per Mcfe  realized by the  Company.  The  Company's
average natural gas sales price increased 53 percent to $5.35 per Mcf from $3.50
per Mcf during 2002,  while the average oil sales price  increased 16 percent to
$28.90



per barrel from $24.94 per barrel a year ago.  The above  prices  include
the effects of hedging activities.

After dividends, accretion of discount on dividends and the cumulative effect of
change in accounting principle, the Company reported net income of $7.2 million,
or $0.50 and $0.43 per basic and diluted share, respectively, for the year ended
December 31, 2003, as compared to $4.2 million, or $0.30 and $0.26 per basic and
diluted share, respectively, for 2002.

EBITDA in the year  ended  December  31,  2003  reached a record  level of $25.7
million, or $1.80 and $1.54 per basic and fully diluted share, respectively,  as
compared to $18.2 million, or $1.28 and $1.12 per basic and fully diluted share,
respectively,  during the year ended  December 31, 2002.  The increase in EBITDA
was due mainly to the  increase in  revenues  partially  offset by higher  lease
operating and general and administrative costs.

Oil and gas operating expenses,  including  production taxes,  increased to $6.7
million  during the year ended  December 31,  2003,  as compared to $4.9 million
during 2002,  due to a combination  of higher  production  taxes from  increased
commodity  prices  and higher  lifting  costs as a result of  workovers  and the
incremental cost of operating an increased number of wells.

DD&A expenses were $11.9 million ($1.59 per Mcfe) during year ended December 31,
2003 as compared to $10.6 million  ($1.47 per Mcfe) during 2002. The increase in
DD&A  expense was due to an increase in the DD&A rate related to the increase to
the proved  property cost base from  exploration  and  development  drilling and
transfers  of cost  from  the  unproved  property  pool  and in  part to  higher
production.

G&A expenses  increased to $5.6 million  during the year ended December 31, 2003
from $4.1  million  during the same period of 2002.  The increase in G&A was due
primarily to the higher  salaries for additional  operational  staff,  executive
severance  expense,  increased  legal and  professional  fees related to certain
special projects and higher insurance costs.

Using the equity method of accounting, Carrizo recorded a charge of $0.8 million
(after tax), or $0.06 and $0.05 per basic and fully diluted share, respectively,
in connection with Carrizo's  equity ownership in Pinnacle's  financial  results
for the period.

"We were very pleased with our performance in 2003,  particularly  regarding our
record  production,  EBITDA  and  drilling  success,  and the  additions  to our
exploration prospect inventory from our growing 3-D seismic database," commented
S.P.  Johnson  IV,  Carrizo's  President  and Chief  Executive  Officer.  "These
factors,  in  combination  with the  capital we  recently  raised,  put us in an
excellent  position  to  execute  a much  larger  drilling  program  than in any
previous  year. We have already  ramped up our drilling  program with five wells
currently drilling with an average working interest of 51 percent, four of which
have significant targets."

Carrizo  Oil & Gas,  Inc.,  is a  Houston-based  energy  company  engaged in the
exploration,  development, exploitation and production of oil and natural gas in
proven  onshore  trends  primarily  along  the Texas and  Louisiana  Gulf  Coast
regions.  Carrizo controls  significant



prospective  acreage  blocks and  utilizes  advanced 3-D seismic  techniques  to
identify potential oil and gas reserves and drilling opportunities.

Statements in this news release,  including but not limited to those relating to
results,  reserves,  testing,  sales, the Company's or management's  intentions,
beliefs,  expectations,  hopes,  projections,  assessment of risks, estimations,
plans or  predictions  for the  future  including  potential  effects or timing,
timing of  completion  and drilling of wells and other  statements  that are not
historical  facts are  forward  looking  statements  that are  based on  current
expectations.  Although the Company  believes that its expectations are based on
reasonable  assumptions,  it can give no assurance that these  expectations will
prove  correct.  Important  factors  that could cause  actual  results to differ
materially from those in the forward looking  statements include the results and
dependence on exploratory  drilling  activities,  operating  risks,  oil and gas
price levels,  land issues,  availability of equipment,  weather and other risks
described in the  Company's  Form 10-K for the year ended  December 31, 2002 and
its other filings with the Securities and Exchange Commission.



                             CARRIZO OIL & GAS, INC.
                            STATEMENTS OF OPERATIONS
                                   (unaudited)




                                                                      THREE MONTHS ENDED                TWELVE MONTHS ENDED
                                                                         DECEMBER 31,                      DECEMBER 31,
                                                               -------------------------------   --------------------------------
                                                                    2003             2002            2003              2002
                                                               --------------   --------------   --------------    --------------
                                                                                                       

Oil and natural gas revenues                                   $   8,892,967    $   9,243,094    $  38,508,067     $  26,802,440
                                                               --------------   --------------   --------------    --------------

Costs and expenses:
   Oil and natural gas operating expenses                          1,653,402        1,221,355        6,723,857         4,908,377
   Depreciation, depletion and amortization                        3,140,338        3,242,467       11,867,651        10,574,408
   General and administrative expenses                             1,364,627        1,083,584        5,638,623         4,132,979
   Accretion expense related to asset retirement obligations          12,842                -           41,518                 -
   Stock option compensation expense (benefit)                        (6,348)         (14,220)         312,889           (84,696)
                                                               --------------   --------------   --------------    --------------

Total costs and expenses                                           6,164,861        5,533,186       24,584,538        19,531,068
                                                               --------------   --------------   --------------    --------------

Operating income                                                   2,728,106        3,709,908       13,923,529         7,271,372
                                                               --------------   --------------   --------------    --------------

Equity in Pinnacle Gas Resources, Inc.                              (652,869)               -         (829,692)                -
Other income and expenses, net                                        15,251           29,268           27,717           274,098
Interest income                                                        8,351           10,912           58,603            55,148
Interest expense, net of amounts capitalized                         (61,386)          (1,190)         (77,118)           (1,190)
                                                               --------------   --------------   --------------    --------------

Income before income taxes                                         2,037,453        3,748,898       13,103,039         7,599,428
                                                               --------------   --------------   --------------    --------------

Income tax expense                                                 1,009,795        1,353,049        5,062,630         2,809,212
                                                               --------------   --------------   --------------    --------------

Net income before cumulative effect of
  change in accounting principle                                   1,027,658        2,395,849        8,040,409         4,790,216
                                                               --------------   --------------   --------------    --------------

Dividends and accretion of discount on preferred stock               189,376          173,218          740,830           588,408
                                                               --------------   --------------   --------------    --------------

Net income available to common shares before cumulative
   effect of change in accounting principle                          838,282        2,222,631        7,299,579         4,201,808
                                                               --------------   --------------   --------------    --------------

Cumulative effect of change in accounting principle                        -                -          128,374                 -
                                                               --------------   --------------   --------------    --------------

Net income available to common shares                          $     838,282    $   2,222,631    $   7,171,205     $   4,201,808
                                                               ==============   ==============   ==============    ==============

EBITDA (see table below)                                       $   5,896,537    $   6,981,643    $  25,732,041     $  18,119,878
                                                               ==============   ==============   ==============    ==============

Basic net income per common share:
  Net income before cumulative effect of
    change in accounting principle                             $        0.06    $        0.16    $        0.51     $        0.30
  Cumulative effect of change in accounting principle                   0.00             0.00            (0.01)             0.00
                                                               --------------   --------------   --------------    --------------

  Basic net income per common share                            $        0.06    $        0.16    $        0.50     $        0.30
                                                               ==============   ==============   ==============    ==============

Diluted net income per common share:
  Net income before cumulative effect of
    change in accounting principle                             $        0.05    $        0.14    $        0.44     $        0.26
  Cumulative effect of change in accounting principle                   0.00             0.00            (0.01)             0.00
                                                               --------------   --------------   --------------    --------------

Diluted net income per common share                            $        0.05    $        0.14    $        0.43     $        0.26
                                                               ==============   ==============   ==============    ==============

Basic weighted average common shares outstanding                  14,569,768       14,176,528       14,311,820        14,158,438
                                                               --------------   --------------   --------------    --------------

Diluted weighted average common shares outstanding                17,288,664       16,253,995       16,744,296        16,148,443
                                                               --------------   --------------   --------------    --------------


                                     (more)



                             CARRIZO OIL & GAS, INC.
                             CONDENSED BALANCE SHEET





                                                                  12/31/03         12/31/02
                                                               --------------   --------------
                                                                (unaudited)
                                                                          
ASSETS:
  Cash and cash equivalents                                    $   3,322,057     $  4,743,459
  Other current assets                                            11,003,512        9,358,716
  Net property and equipment                                     135,273,200      120,526,484
  Other assets                                                       567,755          759,524
  Investment in Pinnacle Gas Resources, Inc.                       6,636,589
                                                               --------------   --------------

TOTAL ASSETS                                                   $ 156,803,113    $ 135,388,183
                                                               ==============   ==============

LIABILITIES AND EQUITY:
  Accounts payable and accrued liabilities                     $  24,001,971    $  12,832,519
  Current maturities of long-term debt                             2,139,549        2,711,685
  Long-term notes payable                                          7,121,646       12,408,186
  Long-term subordinated notes payable                            26,991,413       25,477,844
  Deferred income taxes                                           12,479,553        7,666,048
  Other liabilities                                                  883,117        1,102,941
  Convertible participating preferred stock                        7,114,103        6,373,273
  Equity                                                          76,071,761       66,815,687
                                                               --------------   --------------

TOTAL LIABILITIES AND EQUITY                                   $ 156,803,113    $ 135,388,183
                                                               ==============   ==============


(1) Income tax expense for the three and twelve months ended December 31, 2003
    includes a $964,795 and $4,882,630, respectively, provision for deferred
    income taxes and a $45,000 and $180,000, respectively, provision for
    currently payable franchise taxes.  Income tax expense for the three and
    twelve months ended December 31, 2002 includes a $1,312,114 and $2,645,472,
    respectively, provision for deferred income taxes and a $40,935 and
    $163,740, respectivley, provision for currently payable franchise taxes.

(2) Long-term notes payable at December 31, 2003 and December 31, 2002 includes
    a note in the principal amount of $863,246 and $5,250,000, respectively,
    payable by CCBM, Inc. (a wholly-owned subsidiary of the Company) to Rocky
    Mountain Gas, Inc. recourse solely to CCBM, Inc.'s interests in certain
    undeveloped oil and natural gas leases in Wyoming and Montana.  At December
    31, 2003 and December 31, 2002 current maturities of long-term debt include
    $863,246 and $1,500,000, respectively, related to the CCBM, Inc. note.

(3) Subordinated notes payable are presented net of discounts of $342,012 and
    $428,079 as of December 31, 2003 and December 31, 2002, respectively.

(4) Stock option compensation expense (benefit) is a non-cash charge (benefit)
    resulting from the change in the price of the stock underlying employee
    stock options that were repriced in February 2000.

(5) In February 2002, the Company consummated the sale of $6 million of
    convertible participating preferred stock and warrants to purchase the
    Company's common stock.  Convertible preferred stock is presented net of
    discounts.

(6) The Company adopted Financial Accounting Standards Board Statement of
    Financial Accounting Standards ("SFAS") No. 143, "Accounting for Asset
    Retirement Obligations" on January 1, 2003,  resulting in a charge of
    $128,374 for the quarter ended March 31, 2003 to record the cumulative
    effect of the change in accounting principle.

                          (more)



                             CARRIZO OIL & GAS, INC.
                              NON-GAAP DISCLOSURES
                                   (unaudited)




                                                                      THREE MONTHS ENDED             TWELVE MONTHS ENDED
                                                                        DECEMBER 31,                   DECEMBER 31,
       Reconciliation of Net Income to EBITDA                        2003           2002            2003            2002
       --------------------------------------                    ------------   ------------   -------------  -------------
                                                                                                  

Net income before cumulative effect
   of change in accounting principle                             $ 1,027,658    $ 2,395,849    $  8,040,409   $  4,790,216
                                                                 ------------   ------------   -------------  -------------

Cumulative effect of change in accounting principle                        -              -         128,374              -
                                                                 ------------   ------------   -------------  -------------

Net Income                                                       $ 1,027,658    $ 2,395,849    $  7,912,03    $  4,790,216
                                                                 ------------   ------------   -------------  -------------

Adjustments:
  Depreciation, depletion and amortization                         3,140,338      3,242,467      11,867,651     10,574,408
  Interest expense, net of amounts capitalized
    and interest income                                               53,035         (9,722)         18,515        (53,958)
  Income taxes                                                     1,009,795      1,353,049       5,062,630      2,809,212
  Equity in Pinnacle Gas Resources, Inc.                             652,869                        829,692
  Accretion expense related to asset retirement obligations           12,842              -          41,518              -
                                                                 ------------   ------------   -------------  -------------

EBITDA, as defined                                               $ 5,896,537    $ 6,981,643    $ 25,732,041   $ 18,119,878
                                                                 ============   ============   =============  =============

EBITDA per basic common share                                    $      0.40    $      0.49    $       1.80   $       1.28
                                                                 ============   ============   =============  =============

EBITDA per diluted common share                                  $      0.34    $      0.43    $       1.54   $       1.12
                                                                 ============   ============   =============  =============




                             CARRIZO OIL & GAS, INC.
                          PRODUCTION VOLUMES AND PRICES
                                   (unaudited)




Production volumes-
                                                                                                  

    Oil and condensate (Bbls)                                         87,700        139,984         450,343        401,015
    Natural gas (Mcf)                                              1,329,268      1,257,601       4,760,906      4,800,516
    Natural gas equivalent (Mcfe)                                  1,855,468      2,097,505       7,462,964      7,206,606

Average sales prices-

    Oil and condensate (per Bbl)                                 $     28.17    $     27.93    $      28.90   $      24.94
    Natural gas (per Mcf)                                        $      4.83    $      4.24    $       5.35   $       3.50
    Natural gas equivalent (per Mcfe)                            $      4.79    $      4.41    $       5.16   $       3.72



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