Harold N. Black, W.C. Carlile, Gerald R. Coulter & Sam Blalock, Halliburton Services
A San Andres Task Force Group was initiated by Halliburton Services in January 1972, with the primary objective being to improve production stimulation results for the San Andres formation of the Permian Basin. A scientific approach was envisioned to combine lithology with engineering, laboratory and field date to determine the best type of treatment for San Andres wells. This study was divided into three parts. Phase I of this project was an organizational and data-gathering phase. Phase II was primarily a data and sample analysis phase. During this period, data and information were analyzed to define variations in rock type for one particular geographical area. The objective was to determine if a relationship could be found between depositional environment and rock type. Methods for determining basic rock type were to be investigated in this phase of the San Andres formation study. The purpose of Phase III was to make a study of the results of various types of stimulation treatments for the different rock types in the San Andres formation. The purpose of this study was to determine if certain types of treatment might be more effective for a specific rock type. If this were true, the best general type of stimulation for a particular area producing from the San Andres formation might be selected once the rock-type of the formation had been determined.