Development of Petrophysical Techniques for Evaluating Tight Gas Sands. Final Technical Report December 1984-November 1988

摘要

Formation evaluation techniques based on the integration of wireline logging, core analysis, and in situ stress tests have been developed to establish volumetrics, permeabilities, mechanical properties, and closure stresses of potential hydrocarbon bearing reservoirs in the Travis Peak-Hosston formation of northeast Texas and north Louisiana. Objectives of the program included the establishment of a disc stored data base; the quantitative evaluation of all wells in the data base for petrophysical properties utilizing methodologies developed during the study; the identification of zones of high in situ permeability; the development of correlations of gas and water permeability; and the determination of mechanical properties and in situ closure stresses for massive hydraulic fracture design. Results of these efforts have been documented and compare favorably with well tests and core data. They include reliable methods for analyses of porosities and water saturations, predictions of permeabilities from pre-fracture analyses, and determinations of mechanical properties and in situ stress profiles for input into fracture models.