The horizontal San Andres play on the Central Basin Platform in West Texas is generally categorized as two plays. If you draw an east-west line to divide Gaines County, Texas, in half, operators drilling to the north of the line focus on the lower San Andres and to the south, on the upper San Andres. There is considerable geographic distance between each play, as it’s approximately 140 miles from northern Cochran County to southern Ector County.

The geologic setting and depositional environment of the San Andres in each play is vastly different, and what’s more, the completion methods and the production profile of each play are different.

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