MOBIL TESTS HEFTY GULF GAS WELL

Mobil Exploration & Producing U.S. Inc. has gauged its largest Gulf of Mexico gas well. The C-16ST development well, drilled to 14,374 ft measured depth in High Island Block A-572, flowed at a stabilized rate of 60 MMcfd of gas and 5,521 b/d of condensate through a 1 1/4 in. choke with 2,250 psi flowing tubing pressure from Middle Pliocene sand at 12,911-13,020 ft. Site is 120 miles southeast of Galveston, Tex. Mobil said the test showed that mature producing areas can add important new

April 15, 1991

Mobil Exploration & Producing U.S. Inc. has gauged its largest Gulf of Mexico gas well.

The C-16ST development well, drilled to 14,374 ft measured depth in High Island Block A-572, flowed at a stabilized rate of 60 MMcfd of gas and 5,521 b/d of condensate through a 1 1/4 in. choke with 2,250 psi flowing tubing pressure from Middle Pliocene sand at 12,911-13,020 ft.

Site is 120 miles southeast of Galveston, Tex.

Mobil said the test showed that mature producing areas can add important new reserves to U.S. energy supplies.

Mobil last year reported the largest oil flow from a single completion in the Gulf of Mexico, when its A-17 well on High Island A-382 flowed 9,300 b/d from 485 ft of Lower Pleistocene pay. More than 100 wells had been drilled in the field at the time of Mobil's record test (OGJ, July 30, 1990, p. 39).

Mobil owns a 42.9% interest in the C-16ST well, Northwestern Mutual Life Insurance Co. 37.6%, Unocal Exploration Corp. 13.6%, and Fina Oil & Chemical Co. 5.9%.