The Maurice A. Biot Lecture 2017
The Maurice A. Biot LectureCompaction Localization, Permeability Evolution and
Monday, November 13, 2017
Effective Stress Behavior of Porous Rock
December 7, 2017 (3:00 - 4:00 pm)
Professor Teng-fong Wong
Chinese University of Hong Kong
How a porous rock fails in response to inelastic compaction, as well as the permeability evolution, have
significant impact on many applications related to natural energy resources and the environment. For a long time, the conventional thinking has been that the only mode of failure is by diffuse compaction, without any involvement of strain localization. However, in the past two decades field observations in porous sandstone have documented localized deformation in the form of relatively narrow tabular zones with intense compaction but negligible shear. Within such compaction bands, reduction of both porosity and connectivity can lead to significant permeability decrease and enhanced anisotropy, which can modify the hydrological flow field. Discovery of this intriguing phenomenon has motivated systematic experimental, theoretical and numerical investigations to probe the mechanics of compaction localization on multiple scales.
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