Geologic and engineering studies were conducted within fluvial/deltaic strata of a mature South Texas field to determine the impact of reservoir compartmentalization on secondary gas recovery. Stratton is one of several mature South Texas fields containing fluvial and deltaic gas reservoirs.
Coalbed methane production has been established in the Sand Wash Basin. Large coal resources, gas shows during drilling of coal beds, and high gas contents in some coals triggered initial development along the basin margins. Results to date have been disappointing.
Cores and supporting petrophysical data from 20 wells in McAllen Ranch field were analyzed.
Coalbed methane is playing an increasingly important role in meeting the energy needs of the United States. According to one estimate, this unconventional gas may supply 4-5% of the domestic natural gas in 1994.
The Jackson-Yegua Barrier/Strandplain Sandstone play is a prolific oil-producing trend in South Texas that has high average porosity (31 percent) and permeability (600 md).