BULLDAWG PROSPECTLiberty County, Texas

HOUSTON, Oct. 5, 2005 PRNewswire-First Call -- Carrizo Oil & Gas, Inc. (Nasdaq: CRZO) announced today that the Galloway #1 well in Liberty County, Texas has been successfully drilled and completed, and was put on line on September 30th. Logs indicated 64 feet of apparent net pay in the Cook Mountain sand. The Galloway #1 has tested at estimated rates of up to 13,100 MCF of natural gas and 320 barrels of oil (15,020 MCFE) per day with a flowing tubing pressure of 9,897 psi. The Galloway #1 is currently producing to sales at a constrained rate of approximately 10,100 MCF of natural gas and 240 barrels of oil (11,540 MCFE) per day.

GALLOWAY #1

GALLOWAY #2

DENVER, July 25, 2006 /PRNewswire-FirstCall via COMTEX News Network/ -- Cimarex Energy Co. (NYSE: XEC) Galloway Gas Unit #2 (50% working interest) commenced production in July and is currently producing gas of 9.4 MMcf/d and oil of 1,200 barrels per day (16.6 MMcfe/d).

HOUSTON, May 18 PRNewswire-First Call/ -- Carrizo Oil & Gas, Inc. (Nasdaq: CRZO) In Liberty County, Texas, the Company-operated Doberman prospect is producing at 11.2 MMCFE/d from Yegua sands at 13,000 feet. Carrizo generated the prospect and has a 71 percent working interest. DOBERMAN PROJECT

IPF: 9287 MCFPD; 188.4 BOPDAvg. Daily Prod: 8219 MCFPD; 166 BOPDMax avg. for a month: 10,424 MCFPD; 217 BOPDCurrent Cum: 180,384 BO; 8.8 BCFROI To Date 400% + tax benefits

BULLDOG-1X = 3767733Y = 131078350 RADIUS+/- 14,79032 ACRESBULLDOG-2X = 3769363Y = 132132350 RADIUS+/- 14,71542 ACRESUPPER and LOWER NOD MEXCumulative (since 1970) 356 MMCF; 19,841 BO Cumulative (since 1970) 134,986 BO; 1,317 MMCF Cumulative (since 1970) 1,156 MMCF; 21,103 BO Cumulative (since 1970) 968 MMCF; 22,069 BO Cumulative (since 1970) 3,997 MMCF; 73,967 BO CHOICE BULLDOGSHALLOW (lower section) NOD-MEX PACKAGECARRIZO DOBERMANSHALLOW NOD-MEX PACKAGEX = 3769363Y = 132323350 RADIUS14,140 +/-95 ACRE (MAX)UPPER NODLOWER NOD

FORMATION STRUCTURE Upper NOD MEXBulldawg Location A 95 acresUpper NOD MEX13,484 Log ShowCRZO 1Galloway 1GU-1Upper NOD MEXCRZO 1-Doberman GUProduction since 5/07 = 8.5 BCF + 175,000 Barrels 100 Acres Estimated Recovery = 16 BCF + 340,000 Barrels Lower NOD MEXField Pay Sand CRZO 1Galloway GU-2 23 acresProduced: 1.1 BCF & 21,100 Barrels

Lower NOD MEXField Pay Sand CRZO 1Galloway GU-1 60 acresProduced 4 BCF +74,000 Barrels

Lower NOD MEXField Pay Sand Bulldawg Location A 32 acresLower NOD MEXField Pay Sand Bulldawg Location B 42 acresLower NOD MEX Field Pay Sand XEC 1Galloway GU-1 29 acresProduced 1.6 BCF +165,000 Barrels

Bulldawg Surface LocationTrinity RiverUpper NOD MEXLocation A: 95 acresUpper NOD MEXCRZO 1-Doberman GUProduction since 5/07 = 8.5 BCF + 175,000 Barrels 100 Acres @ 8.5 MMCFD & 150 BOPDEstimated Recovery = 16 BCF + 340,000 Barrels Lower NOD MEX - Field PayLocation B : 42 acresLower NOD MEX - Field PayLocation A: 32 acresLower NOD MEX - Field PayXEC 1-Grammier20 acres.51 BCF & 21,100 barrels