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The AAPG/Datapages Combined Publications Database
AAPG Special Volumes
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The Collegeport field is perhaps unique as the first and largest Miocene dry-gas discovery in the coastal trend of the Upper Gulf Coast region of Texas. This anticlinal field is 3 by 6 mi and has 11,000 acres proved productive by 41 wells. Gas production currently is from 14 reservoirs in upper and middle Miocene sandstone ranging from 1,900 to 5,600 ft in depth. Four reservoirs have been depleted. Oil production is from a small, isolated reservoir at the east end of the field. Most of the reservoirs are sandstone lenses limited to the field area.
The field is fully developed in the Miocene gas sands. Current annual gas production is 17.5 billion cu ft. Field reserves are about 60 per cent depleted.
Gas mixtures differ little according to depth and areal location. Methane content averages between 98 and 99 per cent, and heating values average about 1,000 BTU per cubic foot of gas.
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