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Sandstone reservoir description: an overview of the role of geology and mineralogy

Published online by Cambridge University Press:  09 July 2018

A. Hurst  and
J. S. Archer
A. Hurst
Affiliation:
Department of Reservoir Evaluation, Statoil, Forus, Posboks 300, N-4001 Stavanger, Norway
J. S. Archer
Affiliation:
ERC Energy Resource Consultants Ltd., 15 Welbeck Street, London W1M 7PF
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Abstract

Reservoir description is achieved by the integration of geological, petrophysical and engineering data. Modelling of reservoir performance is made by creating a three-dimensional model of the reservoir volume, where the reservoir is built of cells and layered zones which are defined geologically. Although the scale of cell size is coarse compared to the scale of geological data, it is important that the geological input to define cells is as precise as possible. The texture of clay minerals and their composition are requisite for understanding their influence on reservoir characteristics. Wireline logs probably do not provide sufficient information about clay mineralogy to evaluate reservoir characteristics, but do allow the extrapolation of ‘point’ mineralogical data into a continuous reservoir description. Evaluation of porosity, permeability and saturation are described, and the possible influence of clay mineralogy on evaluation of these characteristics is discussed.

Type
Research Article
Information
Clay Minerals , Volume 21 , Issue 4 , October 1986 , pp. 791 - 809
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1986

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