Wildcat discovery being completed in Matagorda County, Tex.

By the OGJ Online Staff

HOUSTON, Dec. 20 -- A wildcat discovery thought to be primarily natural gas is being completed in Matagorda County, Tex.

Brigham Exploration Co. is operator of the Staubach No. 1 well that last week logged some 36 ft of apparent net pay in the Lower Frio sands at a depth of 11,500 ft.

There has not yet been a flow test of that well, said officials at Carrizo Oil & Gas Inc., Houston, which owns a 35% working interest before payout and 29.75% after payout, subject to partner elections and unit configuration. Additional development well locations are being considered, they said.

Carrizo participated in drilling 26 wells this year. Of those, 18 were successful and 3 are still drilling, resulting in a success rate of more than 78% for wells drilled to total depth, officials said.

Carrizo is the operator of the previously announced Canter Gas Unit No. 1 discovery in Liberty County, Tex., that logged 29 ft of apparent net pay in the Cook Mountain sand interval. The well subsequently was completed and tested at a rate of 5.2 MMcfd at 5,100 psi on a 12/64-in. choke.

It is awaiting pipeline connection and is expected to begin production in the first quarter of 2002, said Carrizo officials.

Carrizo owns 70.03% working interest in the well before payout and a 53.6% working interest after payout.

Several additional Cook Mountain prospects have been identified and are being evaluated for drilling during 2002, said company officials.

Carrizo also served as operator in drilling the previously announced Coleto Cattle No. 1 discovery in its Cabeza Creek project area in Goliad County, Tex. That well logged 24 ft of apparent net pay in the Wilcox sand interval. After completion, it flowed 450 Mcfd with a bottom-hole pressure of more than 9,500 psi.

That well is being fracture stimulated to increase its anticipated production rate.

Carrizo holds a 26.32% working interest in the well. It also is drilling another 14,200-ft Wilcox test well in a nearby fault block in the Cabeza Creek project area that is expected to reach total depth and log in the next 2 weeks.

Carrizo owns a 15.5% working interest in the Albrecht No. 1 field extension in the Cabeza Creek project area.

The well logged 32 ft of apparent net pay in the Wilcox sand interval. It tested at 2.3 MMcfd of gas equivalent at 3,250 psi on an 11/64-in. choke. The well likely will be fracture stimulated to increase its production rate when it goes on line in the first quarter of 2002.

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