The Slaughter field of Cochran, Hockley, and Terry counties, Texas, covers approximately seventy squares miles and on February 1, 1941, it contained 162 producing oil wells.

Present control shows no structural closure. The field is situated on a series of noses dipping gently south-southeast but these do not control production.

The pay section, which is about 100 feet thick, is the Permian San Andres dolomite. The pay is a brown granular dolomite having inter-crystalline porosity. In some parts of the pay section larger openings also occur. The depth to the top of the pay, which is about 800 feet below the top of the San Andres, ranges from approximately 4,900 to 5,000 feet. The southern and eastern limits of the field are mainly determined by the structural position of this pay with reference to the water table.

Production to the west seems to be limited by contamination of the pay section with silt and anhydrite. Two structurally high dry holes on this side of the field showed large amounts of silt and anhydrite in the beds equivalent to the pay section.

The northern limits of production have not been defined but indications point to a breaking down of the section in this direction also.

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