Experimental study of elastic wave propagation anisotropy and permeability anisotropy in an illitic shale

Colin Jones, P G Meredith

Research output: Chapter in Book/Report/Conference proceedingConference contribution

14 Citations (Scopus)

Abstract

Shales are highly anisotropic and are generally characterized by very low permeabilities. In this paper we report results of an experimental study of the relationship between elastic wave propagation anisotropy and permeability anisotropy of an illitic shale. Elastic wave velocity was measured as a function of angle relative to the bedding plane orientation. Radial compressional and shear wave velocities were measured around the circumference of a core taken parallel to the bedding of the shale. The shale was highly anisotropic. Permeability measurements were then taken for cores oriented in the directions of the maximum and minimum velocities. The permeability was measured using a novel steady-state-flow permeameter capable of measuring extremely low flow rates of water, brine, or oil. At low effective pressure the shale was highly anisotropic, but the anisotropy reduced to zero at high effective pressure. We compare the shale results with those from measurements on a sandstone and a tuff, where permeability anisotropy is maintained even up to the highest effective pressures used.

Original languageEnglish
Title of host publicationProceedings of the SPE/ISRM Rock Mechanics in Petroleum Engineering Conference
Pages307-313
Number of pages7
Volume2
DOIs
Publication statusPublished - 1998
EventSPE/ISRM: Rock Mechanics in Petroleum Engineering - Trondheim, Norway
Duration: 8 Jul 199810 Jul 1998

Conference

ConferenceSPE/ISRM: Rock Mechanics in Petroleum Engineering
Abbreviated titleEurock 98
CountryNorway
CityTrondheim
Period8/07/9810/07/98

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    Jones, C., & Meredith, P. G. (1998). Experimental study of elastic wave propagation anisotropy and permeability anisotropy in an illitic shale. In Proceedings of the SPE/ISRM Rock Mechanics in Petroleum Engineering Conference (Vol. 2, pp. 307-313) https://doi.org/doi:10.2118/47369-MS