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The AAPG/Datapages Combined Publications Database

AAPG Special Volumes


AAPG Memoir 69: Reservoir Quality Prediction in Sandstones and Carbonates, 1997
Edited by J. A. Kupecz, J. Gluyas, and S. Bloch
Pages 91-101

A Geological Approach to Previous HitPermeabilityNext Hit Prediction in Clastic Reservoirs

Jonathan Evans, Chris Cade, Steven Bryant


Previous HitPermeabilityNext Hit is a key parameter in determining the economic value of a hydrocarbon accumulation; however, our ability to predict the magnitude and range of Previous HitpermeabilityNext Hit in undrilled areas is poor. Traditional methods of Previous HitpermeabilityNext Hit prediction are empirical and rely on developing relationships between Previous HitpermeabilityNext Hit and other parameters that may be predicted with greater confidence, such as porosity or lithology. These empirical methods may work well in areas where there is sufficient calibration data, but extrapolation away Previous HitfromNext Hit well data is prone to large errors (often by orders of magnitude).

An alternative approach to Previous HitpermeabilityNext Hit prediction is to model the effect of geological processes such as burial and cementation on the pore structure of the rock and, hence, calculate the change in Previous HitpermeabilityNext Hit. Through understanding the effect of various geological processes on Previous HitpermeabilityNext Hit, it is then possible to predict Previous HitpermeabilityNext Hit Previous HitfromNext Hit geological models. This approach has applications in both data-rich and undrilled areas.

The quantitative insight into which factors affect the Previous HitpermeabilityNext Hit has been provided by computer modeling, which allows us to focus in on the most important controls, such as grain size and the amount of cement or ductile grains. Our ability to predict Previous HitpermeabilityNext Hit in undrilled areas is now more often hampered by our inability to predict the variations in these controlling factors rather than by any lack of understanding of Previous HitpermeabilityNext Hit itself.

1 Present address: Center for Subsurface Modeling, Texas Institute for Computational and Applied Mathematics, University of Texas at Austin, U.S.A.

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