Deepwater gas find gauged north of Tobago

The first well on deepwater Block 22 in the Caribbean north of Tobago Island is a large gas discovery, said operator Petro-Canada.

Jan 23rd, 2008

By OGJ editors
HOUSTON, Jan. 23 -- The first well on deepwater Block 22 in the Caribbean north of Tobago Island is a large gas discovery, said operator Petro-Canada.

The Cassra-1 wildcat in 1,411 ft of water on the northwest edge of a 26-sq-mile seismic amplitude anomaly flowed at an equipment restricted rate of 23 MMcfd from a 30-ft interval in an undisclosed formation. The well went to TD of 5,617 ft and established a gas-water contact for the anomaly.

Petro-Canada said, "Based on the well results and using local field analog recovery factors, our seismic model indicates the discovery could contain in the range of 0.6 to 1.3 tcf of recoverable contingent resources." Appraisal is required to finalize the estimates.

Petro-Canada said the discovery validates its exploration model.

The Diamond Offshore Ocean Worker semisubmersible is to move 2.8 miles south to drill Cassra-2, which as part of its objective will appraise the Cassra-1 discovery. Then it will drill two to three other prospects on Block 22 in an expected five-well 2008 drilling program.

Block 22 interests are Petro-Canada 90% and Petroleum Co. of Trinidad and Tobago 10%.

The Cassra discovery is 75 miles east-northeast of the North Coast Marine Area, where Petro-Canada produces a net 65 MMcfd to its 17.3% interest in a project that supplies gas for the Atlantic LNG project.

Petro-Canada is also carrying out a multiwell exploration program on Blocks 1a and 1b in the Gulf of Paria, where it holds 80% interest.

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