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Petroleum Geoscience; February 2007; v. 13; no. 1; p. 63-67; DOI: 10.1144/1354-079305-677
© 2007 Geological Society of London
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Original Article

Sandstone compaction, grain packing and Critical State Theory

Øystein Pettersen

Centre for Integrated Petroleum Research, Allégt. 41, 5007 Bergen, Norway (e-mail: oystein.pettersen@cipr.uib.no)

Based on the physics of grain packing in a granular material, this paper demonstrates that sands or sandstones are modelled most correctly by Critical State Theory, which can be used to define a consistent compaction relationship for use in rock mechanics or reservoir simulation. The theoretical model is compared with experimental data for volume and permeability variation during loading or unloading.

KEYWORDS: compaction, failure model, reservoir simulation, rock mechanics, sandstone






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