dc.contributor.author | Fang, Xinding | |
dc.contributor.author | Fehler, Michael | |
dc.contributor.author | Zhu, Zhenya | |
dc.contributor.author | Chen, Tianrun | |
dc.contributor.author | Brown, Stephen | |
dc.contributor.author | Cheng, Arthur | |
dc.contributor.author | Toksoz, M. Nafi | |
dc.contributor.other | Massachusetts Institute of Technology. Earth Resources Laboratory | |
dc.date.accessioned | 2014-09-30T14:06:09Z | |
dc.date.available | 2014-09-30T14:06:09Z | |
dc.date.issued | 2012 | |
dc.identifier.uri | http://hdl.handle.net/1721.1/90467 | |
dc.description.abstract | Formation 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.sponsorship | Massachusetts Institute of Technology. Earth Resources Laboratory (Founding Member Postdoctoral Fellowship) | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | Massachusetts Institute of Technology. Earth Resources Laboratory | en_US |
dc.relation.ispartofseries | Earth Resources Laboratory Industry Consortia Annual Report;2012-09 | |
dc.subject | Logging | |
dc.subject | Inversion | |
dc.title | An approach for predicting stress-induced anisotropy around a borehole | en_US |
dc.type | Technical Report | en_US |