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dc.contributor.authorCiz, Radim
dc.contributor.authorSiggins, A.
dc.contributor.authorGurevich, Boris
dc.contributor.authorDvorkin, J.
dc.date.accessioned2017-01-30T13:59:46Z
dc.date.available2017-01-30T13:59:46Z
dc.date.created2009-03-05T00:57:32Z
dc.date.issued2008
dc.identifier.citationCiz, Radim and Siggins, A. and Gurevich, Boris and Dvorkin, J. 2008. Influence of microheterogeneity on effective stress law for elastic properties of rocks. Geophysics. 73 (1): pp. E7-E14.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/37129
dc.identifier.doi10.1190/1.2816667
dc.description.abstract

Understanding the effective stress coefficient for seismic velocity is important for geophysical applications such as overpressure prediction from seismic data as well as for hydrocarbon production and monitoring using time-lapse seismic measurements. This quantity is still not completely understood. Laboratory measurements show that the seismic velocities as a function of effective stress yield effective stress coefficients less than one and usually vary between 0.5 and 1. At the same time, theoretical analysis shows that for an idealized monomineral rock, the effective stress coefficient for elastic moduli (and therefore also for seismic velocities) will always equal one. We explore whether this deviation of the effective stress coefficient from unity can be caused by the spatial microheterogeneity of the rock. The results show that only a small amount (less than 1%) of a very soft component is sufficient to cause this effect. Such soft material may be present in grain contact areas of many rocks and may explain the variation observed experimentally.

dc.publisherSociety of Exploration Geophysics
dc.titleInfluence of microheterogeneity on effective stress law for elastic properties of rocks
dc.typeJournal Article
dcterms.source.volume73
dcterms.source.number1
dcterms.source.startPageE7
dcterms.source.endPageE14
dcterms.source.issn00168033
dcterms.source.titleGeophysics
curtin.note

Published by the Society of Exploration Geophysicists.

curtin.note

Copyright © 2008 Society of Exploration Geophysicists.

curtin.note

The link to the journal’s home page is: http://segdl.aip.org/geophysics

curtin.accessStatusOpen access
curtin.facultyDepartment of Exploration Geophysics
curtin.facultyFaculty of Science and Engineering
curtin.facultyThe Western Australian School of Mines


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