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Analysis of permeability controls: a new approach

Published online by Cambridge University Press:  09 July 2018

C. A. Cade ,
I. J. Evans  and
S. L. Bryant
C. A. Cade
Affiliation:
BP Exploration Operating Company Limited, Uxbridge, Middlesex
I. J. Evans
Affiliation:
BP Exploration Operating Company Limited, Uxbridge, Middlesex
S. L. Bryant
Affiliation:
BP Chemicals, Grangemouth, UK
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Abstract

By modelling a range of rock-forming processes such as compaction and various styles of cementation, a new understanding of how they affect pore-system geometry, and hence permeability, has been gained. For example, almost identical permeability-porosity trends result from progressive compaction or grain overgrowth cementation in a clean sandstone, and these trends are curvilinear on the traditional log-linear plot. The steepening which defines the curve marks the onset of pore-throat blocking. Other cement styles, such as pore-filling carbonates or grain-rimming clays, show different porosity-permeability trends. This new understanding can be used predictively (predicting permeability from predictions of grain size and diagenetic style), or as a tool for identifying the important permeability controls in a set of field data. This latter application is presented and illustrated using data from a variety of sandstone types. This approach has important advantages over commonly used multivariate statistical analysis approaches. It can quickly provide a good understanding of what are (and are not) the important controls on permeability. It also provides a basis for more focused and meaningful statistical analysis to quantify these controls.

Type
Research Article
Information
Clay Minerals , Volume 29 , Issue 4 , October 1994 , pp. 491 - 501
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1994

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