EXHIBIT 99.1

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 THIRD QUARTER 2004 FINANCIAL RESULTS INCLUDING
RECORD REVENUES AND EBITDA


HOUSTON,  November  11, 2004 -- Carrizo  Oil & Gas,  Inc.  (Nasdaq:  CRZO) today
reported the Company's  financial  results for the third quarter of 2004,  which
included the following highlights:

Third Quarter 2004 Results --

The third quarter 2004 results included the following highlights:

     o    Production of 2.04 Bcfe.

     o    Record quarterly revenue of $12.3 million.

     o    Net Income of $3.4 million.

     o    Record EBITDA, as defined below, of $9.4 million.

Revenues for the three months ended  September 30, 2004  increased 21 percent to
$12.3  million as compared to $10.1 million  during the quarter ended  September
30, 2003.  The increase in revenues was driven by higher  natural gas production
and higher prevailing oil and natural gas prices.  Production volumes during the
three months ended  September 30, 2004  increased  three percent to 2.04 Bcfe as
compared to 1.99 Bcfe during the third quarter of 2003. The increase was largely
due to new production  contributions  from the Beach House #1, Shadyside #1, the
Lopez #13, the Peal Ranch wells and the Barnett Shale wells partially  offset by
natural  declines.  Carrizo's  average oil sales price  increased  49 percent to
$43.57 per barrel from $29.15 per barrel during the third quarter of 2003, while
the average natural gas sales price increased nine percent to $5.69 per Mcf from
$5.21 per Mcf in the third quarter of 2003.  The above prices include the effect
of hedging activities.

After  dividends,  accretion of discount on preferred  stock and the  cumulative
effect of change in  accounting  principle,  the  Company  reported  net  income
available to common shares ("Net  Income") of $3.4  million,  or $0.15 and $0.15
per basic and diluted share, respectively,  for the three months ended September
30, 2004, as compared to $1.9 million,  or $0.13 and $0.11 per basic and diluted
share,  respectively,  for the same  quarter  during  2003.  Excluding  the $0.1
million  non-cash  after-tax impact of (1) a stock option  compensation  benefit
($0.1 million - related to employee stock options  repriced in 2000) and (2) the
equity  in the  loss  of  Pinnacle  Gas  Resources  ($0.2  million  -  primarily
attributable  to  dividends  on Pinnacle  preferred  stock),  Net Income for the
quarter ended September 30, 2004 was $3.5 million,  or $0.16 and $0.15 per basic
and diluted share, respectively.




EBITDA  (earnings  before  interest,  income tax,  depreciation and amortization
expenses, and certain other non-cash items) during the third quarter of 2004 was
$9.4 million, or $0.43 and $0.41 per basic and diluted share,  respectively,  as
compared  to $6.9  million,  or $0.48 and $0.41  per  basic and  diluted  share,
respectively, during the third quarter of 2003.

Oil and natural gas operating expenses (excluding production taxes) increased to
$1.4 million  during the three months  ended  September  30, 2004 as compared to
$0.9 million for the third  quarter of 2003.  The increase was  primarily due to
higher workover expense and higher lifting costs due to the increased well count
comprised of the Barnett Shale wells  (including the Wolverine  acquisition) and
other new wells mentioned above.

Depreciation,  depletion and  amortization  expenses  ("DD&A") were $3.7 million
during the three  months  ended  September  30, 2004 as compared to $3.1 million
during the third quarter of 2003. The increase in DD&A expense was due to (1) an
increase in the DD&A rate primarily due to additions to the proved property cost
base and (2) an increase in the production volumes.

General and administrative expenses ("G&A") decreased to $1.3 million during the
three months ended  September 30, 2004 from $1.6 million during the same quarter
of 2003.  The  decrease in G&A was largely due to  executive  severance  of $0.3
million in the third quarter of 2003.

Non-cash stock option compensation  benefit was $0.1 million ($0.1 million after
tax) for the three months ended September 30, 2004. This represents the decrease
in value of employee stock options that were repriced in 2000.

Other income and expense for the third quarter of 2004 was a net benefit of $0.3
million  comprised  of (1) the  non-cash  equity  in the  loss of  Pinnacle  Gas
Resources, Inc. ("Pinnacle") of $0.2 million (both before and after tax) and (2)
the sale of our Enron Claim for a gain of $0.5 million, which was fully reserved
for in prior years. Other income and expense for the third quarter of 2003 was a
net charge of $0.2 million  largely  attributable  to the non-cash equity in the
loss of  Pinnacle.  Net losses are  expected in this early  phase of  Pinnacle's
development of its coalbed methane play, initiated in the third quarter of 2003.
Carrizo has no cash requirements for the Pinnacle development program.

Results for the Nine Months Ended September 30, 2004 --

The results for the nine months ended  September  30, 2004 include the following
highlights:

     o    Record Production of 5.89 Bcfe.

     o    Record revenues of $35.1 million.

     o    Net income of $7.4 million.

     o    Record EBITDA, as defined below, of $24.7 million.

Revenues for the nine months ended  September  30, 2004  increased 19 percent to
$35.1  million from $29.6  million  during the nine months ended  September  30,
2003.  The increase in revenues was driven by higher  prevailing oil and natural
gas prices and higher  production.  Production  volumes



during the nine months ended  September 30, 2004  increased five percent to 5.89
Bcfe as compared  to 5.61 Bcfe  during the first nine months of 2003.  Carrizo's
average  oil sales price  increased  28 percent to $37.14 per barrel from $29.08
per barrel during the first nine months of 2003,  while the average  natural gas
sales  price  increased  six  percent to $5.89 per Mcf from $5.56 per Mcf in the
first  nine  months of 2003.  The above  prices  include  the  effect of hedging
activities.

The Company  reported Net Income of $7.4  million,  or $0.38 and $0.36 per basic
and diluted share,  respectively,  for the nine months ended September 30, 2004,
as compared  to $6.3  million,  or $0.45 and $0.38 per basic and diluted  share,
respectively,  for the same  period  during  2003.  Excluding  the $1.2  million
non-cash after-tax impact of (1) stock option compensation expense ($0.4 million
- - related to employee stock options repriced in 2000) and (2) equity in the loss
of Pinnacle Gas Resources  ($0.8  million - comprised  primarily of dividends on
Pinnacle  preferred  stock),  Net Income for the nine months ended September 30,
2004,  was $8.6  million,  or $0.45  and $0.42  per  basic  and  diluted  share,
respectively.

EBITDA during the nine months of 2004 was $24.7 million,  or $1.28 and $1.22 per
basic and diluted share,  respectively,  as compared to $20.2 million,  or $1.42
and $1.22 per basic and diluted share,  respectively,  during the nine months of
2003.

Oil and natural gas operating expenses (excluding production taxes) increased to
$3.7 million during the nine months ended September 30, 2004 as compared to $3.1
million in the first nine months of 2003.  The increase was primarily due to the
increased well count comprised of the Barnett Shale wells and other new wells.

Depreciation,  depletion and amortization  expenses  ("DD&A") were $10.6 million
during the nine months  ended  September  30,  2004 as compared to $8.7  million
during the first nine months of 2003.  The  increase in DD&A  expense was due to
(1) an  increase  in the DD&A rate  primarily  due to  additions  to the  proved
property cost base and (2) in part to increased production volumes.

General and administrative expenses ("G&A") increased to $5.1 million during the
nine months ended September 30, 2004 from $4.3 million during the same period of
2003.  The increase in G&A was due  primarily to higher  incentive  compensation
costs,  higher  professional  fees in connection  with the 2003 year-end  audit,
costs  related  to  Sarbanes-Oxley  compliance,   higher  professional  fees  in
connection  with the  subordinated  debt amendments and in part to higher salary
and benefit costs.

Non-cash stock option compensation  expense was $0.6 million ($0.4 million after
tax) for the nine months ended September 30, 2004.

Other  income and  expense for the first nine months of 2004 was a net charge of
$0.3 million largely comprised of (1) non-cash equity in the loss of Pinnacle of
$0.8 million (both before and after tax) partially offset by (2) the sale of our
Enron claim for a gain of $0.5  million,  which was fully  reserved for in prior
years.

"We are pleased with our financial  performance  year-to-date  including  record
revenues and record EBITDA," commented S.P. Johnson IV, Carrizo's  President and
Chief Executive Officer.  "Operationally we have had an excellent year, reaching
record  production levels while building a large acreage position in the Barnett
Shale.  We are continuing to accelerate our investment in our drilling  program,
both in the Gulf Coast and the Barnett Shale. With Carrizo's improved liquidity,



due to record  EBITDA and our recent debt  financing,  we are very excited about
capitalizing on our Gulf Coast drilling  success and rapidly  expanding  Barnett
Shale position."

Carrizo Oil & Gas, Inc., is a Houston-based  energy company  actively engaged in
the exploration, development, exploitation and production of oil and natural gas
primarily  in proven  onshore  trends 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
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,  cash flow,  drilling  program,
reserve  growth,  effect of  financing,  growth in Barnett  Shale,  the expected
timing  of  drilling  of  additional  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, 2003 and
its other filings with the Securities and Exchange Commission.

                        (Financial Highlights to Follow)




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




                                                             THREE MONTHS ENDED                  NINE MONTHS ENDED
                                                                SEPTEMBER 30,                      SEPTEMBER 30,
                                                    ---------------------------------   ---------------------------------
                                                          2004             2003               2004             2003
                                                    ---------------   ---------------   ---------------   ---------------
                                                                
Oil and natural gas revenues                         $  12,273,980     $  10,123,461     $  35,106,951     $  29,615,100
                                                    ---------------   ---------------   ---------------   ---------------

Costs and expenses:
   Oil and natural gas operating expenses                1,369,169           924,989         3,659,489         3,100,944
   Production taxes                                        757,066           662,442         2,189,284         1,969,512
   Depreciation, depletion and amortization              3,708,441         3,086,393        10,561,427         8,727,313
   General and administrative expenses                   1,295,803         1,624,326         5,075,243         4,273,995
   Accretion expense related to asset
     retirement obligations                                  8,008            10,758            20,892            28,676
   Stock option compensation expense (benefit)            (138,704)          295,867           617,280           319,237
                                                    ---------------   ---------------   ---------------   ---------------

Total costs and expenses                                 6,999,783         6,604,775        22,123,615        18,419,677
                                                    ---------------   ---------------   ---------------   ---------------

Operating income                                         5,274,197         3,518,686        12,983,336        11,195,423
                                                    ---------------   ---------------   ---------------   ---------------

Other income and expenses, net                             268,885          (185,294)         (313,896)         (164,357)
Interest income                                             21,790            13,095            44,717            50,252
Interest expense, net of amounts capitalized               (95,672)           (5,460)         (181,917)          (15,732)
                                                    ---------------   ---------------   ---------------   ---------------

Income before income taxes                               5,469,200         3,341,027        12,532,240        11,065,586
                                                    ---------------   ---------------   ---------------   ---------------

Income tax expense                                       2,078,796         1,259,240         4,820,360         4,052,835
                                                    ---------------   ---------------   ---------------   ---------------

Net income before cumulative effect of change
   in accounting principle                               3,390,404         2,081,787         7,711,880         7,012,751
                                                    ---------------   ---------------   ---------------   ---------------

Dividends and accretion of discount
   on preferred stock                                            -           189,309           350,720           551,454
                                                    ---------------   ---------------   ---------------   ---------------

Net income available to common shares
   before cumulative effect of
   change in accounting principle                        3,390,404         1,892,478         7,361,160         6,461,297
                                                    ---------------   ---------------   ---------------   ---------------

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

Net income available to common shares                $   3,390,404     $   1,892,478         7,361,160         6,332,923
                                                    ===============   ===============   ===============   ===============

EBITDA (see table below)                             $   9,364,841     $   6,894,233        24,713,697        20,154,741
                                                    ===============   ===============   ===============   ===============

Basic net income per common share:
  Net income before cumulative effect of
     change in accounting principle                  $        0.15     $        0.13     $        0.38     $        0.46
  Cumulative effect of change in
     accounting principle                                        -                 -                 -             (0.01)
                                                    ---------------   ---------------   ---------------   ---------------

  Basic net income per common share                  $        0.15     $        0.13     $        0.38     $        0.45
                                                    ===============   ===============   ===============   ===============

Diluted net income per common share:
  Net income before cumulative effect of
     change in accounting principle                  $        0.15    $         0.11     $        0.36     $        0.39
  Cumulative effect of change in
     accounting principle                                        -                 -                 -            (0.01)
                                                    ---------------   ---------------   ---------------   ---------------

Diluted net income per common share                  $        0.15     $        0.11     $        0.36     $        0.38
                                                    ===============   ===============   ===============   ===============

Basic weighted average common shares outstanding        21,909,855        14,264,639        19,255,156        14,224,893
                                                    ---------------   ---------------   ---------------   ---------------

Diluted weighted average common shares outstanding      22,969,833        16,890,630        20,253,905        16,574,238
                                                    ---------------   ---------------   ---------------   ---------------


                                     (more)



                             CARRIZO OIL & GAS, INC.
                             CONDENSED BALANCE SHEET






                                                                                    09/30/04         12/31/03
                                                                                ---------------   ---------------
                                                                                  (unaudited)
                                                                                            
ASSETS:
  Cash and cash equivalents                                                      $   3,542,169     $   3,322,057
  Other current assets                                                              15,363,667        11,003,512
  Property and equipment, net                                                      184,736,422       135,273,200
  Other assets                                                                       1,216,391           567,755
  Investment in Pinnacle Gas Resources, Inc.                                         5,783,719         6,636,589
                                                                                ---------------   ---------------

TOTAL ASSETS                                                                     $ 210,642,368     $ 156,803,113
                                                                                ===============   ===============

LIABILITIES AND EQUITY:
  Accounts payable and accrued liabilities                                       $  30,578,024     $  24,001,971
  Current maturities of long-term debt                                                 304,968         2,139,549
  Long-term notes payable                                                           19,049,590         7,121,646
  Long-term subordinated notes payable, net                                         28,178,183        26,991,413
  Deferred income taxes                                                             16,364,246        12,479,553
  Other liabilities                                                                  1,086,440           883,117
  Convertible participating preferred stock                                                  -         7,114,103
  Equity                                                                           115,080,917        76,071,761
                                                                                ---------------   ---------------

TOTAL LIABILITIES AND EQUITY                                                     $ 210,642,368     $ 156,803,113
                                                                                ===============   ===============


(1)  Income tax expense for the three and nine months ended  September  30, 2004
     includes a $1,999,624 and $4,651,188,  respectively, provision for deferred
     income  taxes and a  $79,172  and  $169,172,  respectively,  provision  for
     currently  payable  franchise  taxes.  Income tax expense for the three and
     nine months ended  September 30, 2003 includes a $1,214,240 and $3,917,835,
     respectively,  provision  for  deferred  income  taxes  and a  $40,935  and
     $122,805, respectively, provision for currently payable franchise taxes.

(2)  Long-term  notes  payable  at  December  31,  2003  includes  a note in the
     principal amount $863,246 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 September 30, 2004 and December 31, 2003 current maturities of
     long-term debt include $194,001 and $863,246, respectively,  related to the
     CCBM, Inc. note.

(3)  Subordinated  notes  payable are presented net of discounts of $277,457 and
     $342,012 as of September 30, 2004 and December 31, 2003, 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.  All  of  the  convertible  participating  preferred  stock  was
     converted  into  1,318,125  shares of common  stock during the three months
     ended June 30, 2004.

(6)  During  the six  months  ended  June  30,  2004,  2,298,611  warrants  were
     converted into 2,003,070 shares of common stock.

(7)  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                  NINE MONTHS ENDED
                                                                   SEPTEMBER  30,                      SEPTEMBER 30,
                                                         ---------------------------------   ---------------------------------
Reconciliation of Net Income to EBITDA                        2004              2003              2004              2003
- ----------------------------------------------------     ---------------   ---------------   ---------------   ---------------
                                                                                                   
Net income before cumulative effect of
   change in accounting principle                         $   3,390,404     $   2,081,787     $   7,711,880     $   7,012,751
                                                         ---------------   ---------------   ---------------   ---------------

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

Net Income                                                $   3,390,404     $   2,081,787     $   7,711,880     $   6,884,377
                                                         ---------------   ---------------   ---------------   ---------------

Adjustments:
  Depreciation, depletion and amortization                    3,708,441         3,086,393        10,561,427         8,727,313
  Interest expense, net of amounts capitalized
     and interest income                                         73,882            (7,635)          137,200           (34,520)
  Income taxes                                                2,078,796         1,259,240         4,820,360         4,052,835
  Equity in loss of Pinnacle Gas Resources, Inc.                244,014           167,823           844,658           176,823
  Stock option compensation expense (benefit)                  (138,704)          295,867           617,280           319,237
  Accretion expense related to asset
     retirement obligations                                       8,008            10,758            20,892            28,676
                                                         ---------------   ---------------   ---------------   ---------------

EBITDA, as defined                                        $   9,364,841     $   6,894,233     $  24,713,697     $  20,154,741
                                                         ===============   ===============   ===============   ===============

EBITDA per basic common share                             $        0.43     $        0.48     $        1.28     $        1.42
                                                         ===============   ===============   ===============   ===============

EBITDA per diluted common share                           $        0.41     $        0.41     $        1.22     $        1.22
                                                         ===============   ===============   ===============   ===============



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




Production volumes-

                                                                     
    Oil and condensate (Bbls)                                    72,634           105,111           243,145           362,643
    Natural gas (Mcf)                                         1,601,708         1,355,022         4,427,309         3,431,638
    Natural gas equivalent (Mcfe)                             2,037,512         1,985,688         5,886,179         5,607,496

Average sales prices-

    Oil and condensate (per Bbl)                          $       43.57     $       29.15     $       37.14     $       29.08
    Natural gas (per Mcf)                                 $        5.69     $        5.21     $        5.89     $        5.56
    Natural gas equivalent (per Mcfe)                     $        6.02     $        5.10     $        5.96     $        5.28



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