During late 1979, Gruy Federal Inc., under contract to DOE, participated with the operator in pressure coring operations in Texas Pacific BRU No. 310, Bennett Ranch Unit, Wasson field, west Texas. The well was planned as part of a program to continue development of the waterflood unit on 20-acre spacing. In all, 26 cores were cut over a 210-foot interval of the San Andres dolomite. The cored interval extended some 50 feet below the estimated original oil-water contact, allowing evaluation of CO2 floodable oil saturation in the transition zone. The analysis of the pressure coring data has provided valuable information that could not have been obtained from conventional cores and/or logs.

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