Oil found in Glen Rose reef, Maverick basin, Texas

March 5, 2002
Saxet Energy Ltd., Houston, and The Exploration Co. (TXCO), San Antonio, experienced an unexpected oil flow in late February while drilling at about 6,500 ft at the Comanche 1-111 well in Maverick County, Tex. The well produced 5,300 bbl of light, 40° gravity oil in about 24 hr from a reef in the Cretaceous Glen Rose.

By Alan Petzet
Managing Editor-Exploration and Economics
HOUSTON, Feb. 10 -- Saxet Energy Ltd., Houston, and The Exploration Co. (TXCO), San Antonio, experienced an unexpected oil flow in late February while drilling at about 6,500 ft at the Comanche 1-111 well in Maverick County, Tex.

The well produced 5,300 bbl of light, 40° gravity oil in about 24 hr from a reef in the Cretaceous Glen Rose, said James E. Sigmon, TXCO's president and CEO. The companies trucked the oil to a refinery, although a pipeline is 4 miles north in the adjoining Sacatosa field.

The well bridged over near 6,400 ft, and Saxet is to cement casing and resume drilling toward permit depth, 9,000 ft. The well was always under control except that it could not be shut in, Sigmon said.

Of about 50 wells TXCO has drilled in the area, only Comanche 1-111 and one other about 20 miles north produced oil from the gas-prone Glen Rose, Sigmon said. The two companies were studying 3D seismic data to assess the areal extent of the oil reservoir.

The well site is in the Maverick basin about 20 miles east of Eagle Pass, Tex. The well is the first drilled by Saxet and TXCO on a 95,000-acre lease.