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dc.contributor.authorFang, Xinding
dc.contributor.authorFehler, Michael
dc.contributor.authorZhu, Zhenya
dc.contributor.authorChen, Tianrun
dc.contributor.authorBrown, Stephen
dc.contributor.authorCheng, Arthur
dc.contributor.authorToksoz, M. Nafi
dc.contributor.otherMassachusetts Institute of Technology. Earth Resources Laboratory
dc.date.accessioned2014-09-30T14:06:09Z
dc.date.available2014-09-30T14:06:09Z
dc.date.issued2012
dc.identifier.urihttp://hdl.handle.net/1721.1/90467
dc.description.abstractFormation elastic properties near a borehole may be altered from their original state due to the stress concentration around the borehole. This could result in a biased estimation of formation properties but could provide a means to estimate in situ stress from sonic logging data. In order to properly account for the formation property alteration, we propose an iterative numerical approach to calculate the stress-induced anisotropy around a borehole by combining the rock physics model of Mavko et al. (1995) and a finite-element method. We show the validity and accuracy of our approach by comparing numerical results to laboratory measurements of the stress-strain relation of a sample of Berea sandstone, which contains a borehole and is subjected to uniaxial stress loading. Our iterative approach converges very fast and can be applied to calculate the spatially varying stiffness tensor of the formation around a borehole for any given stress state.en_US
dc.description.sponsorshipMassachusetts Institute of Technology. Earth Resources Laboratory (Founding Member Postdoctoral Fellowship)en_US
dc.language.isoen_USen_US
dc.publisherMassachusetts Institute of Technology. Earth Resources Laboratoryen_US
dc.relation.ispartofseriesEarth Resources Laboratory Industry Consortia Annual Report;2012-09
dc.subjectLogging
dc.subjectInversion
dc.titleAn approach for predicting stress-induced anisotropy around a boreholeen_US
dc.typeTechnical Reporten_US


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