Measurement of Independent Variables – Pressure, Time, Temperature, Time-Temperature
Alan P. Byrnes, Michael D. Wilson, 1994. "Measurement of Independent Variables – Pressure, Time, Temperature, Time-Temperature", Reservoir Quality Assessment and Prediction in Clastic Rocks, Michael D. Wilson
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Applied overburden is supported by both the rock framework and by the fluids in the pore network. The effective stress which the rock framework experiences is related to the lithostatic (overburden) stress and fluid (pore) pressure as follows:
Pe = P1 -Pf
where: Pe is effective stress, P1 is lithostatic pressure, and Pf is fluid pressure.
This relationship assumes that no directed tectonic stress is acting on the system. The following sections will review lithostatic and fluid pressures and their measurement. Major reviews of pressure concepts, terminology, and measurement are available in Fertl (1976), Gretener (1977), Magara (1978), Plumley (1980) Pickering and Delicato (1985), and Hubbard (1988).
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Reservoir Quality Assessment and Prediction in Clastic Rocks
This course is designed to emphasize the following topics: (1) Historical perspective on previous and current empirical, and geochemical methods of reservoir quality prediction; (2) Overview of diagenetic processes which significantly impact reservoir quality and those factors which act as major controls on those processes; (3) Proper design of a comprehensive or limited-focus predictive analysis of reservoir quality; (4) Methodologies for the accurate measurement of all major dependent and independent variables; (5) Data analysis techniques involved in quality control and the assessment of variability prior to performing multivariate regression; (6) Steps involved in the generation of a multivariate regression to insure that the model developed provides maximum accuracy using a minimum number of independent variables; (7) Case histories from a variety of settings illustrating application of the recommended approach to reservoir quality prediction.