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Acoustic Logging While Drilling (LWD): Experimental Studies with Anisotropic Models

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dc.contributor.author Rao, Rama V. N.
dc.contributor.author Zhu, Zheny
dc.contributor.author Burns, Daniel R.
dc.contributor.author Toksoz, M. Nafi
dc.contributor.other Massachusetts Institute of Technology. Earth Resources Laboratory en_US
dc.date.accessioned 2011-12-21T20:51:07Z
dc.date.available 2011-12-21T20:51:07Z
dc.date.issued 2002
dc.identifier.uri http://hdl.handle.net/1721.1/67853
dc.description.abstract A model LWD tool (0.16" ID, 0.4" OD) was built to investigate its operation in an anisotropic formation. The tool consists of a dipole source and six dipole receivers capable of operating at several hundred kHz. The formation was a block of delabole slate with a borehole of 1.27 cm diameter. In an anisotropic °uid-¯lled borehole with a dipole source and dipole receiver ori- ented along the principal directions, dipole (°exural) modes are mainly observed. Weak compression and shear refracted arrivals are also discernable when they were not ob- scured by stronger arrivals. Further, modes corresponding to fast shear direction are evident in the slow shear direction measurement. With a model LWD tool in the °uid-¯lled borehole, and oriented in the fast and slow directions, the main arrivals were the corresponding °exural modes. Modes cor- responding to the fast shear direction are no longer evident in the slow shear direction measurments. These preliminary experiments suggest that, with an LWD tool in an anisotropic formation, arrivals sensitive to formation properties can be discerned. en_US
dc.description.sponsorship United States. Dept. of Energy (Grant DE-FG02-00ER15041) en_US
dc.description.sponsorship Massachusetts Institute of Technology. Borehole Acoustics and Logging Consortium en_US
dc.publisher Massachusetts Institute of Technology. Earth Resources Laboratory en_US
dc.relation.ispartofseries Earth Resources Laboratory Industry Consortia Annual Report;2002-02
dc.title Acoustic Logging While Drilling (LWD): Experimental Studies with Anisotropic Models en_US
dc.type Technical Report en_US
dc.contributor.mitauthor Rao, Rama V. N.
dc.contributor.mitauthor Zhu, Zheny
dc.contributor.mitauthor Burns, Daniel R.
dc.contributor.mitauthor Toksoz, M. Nafi
dspace.orderedauthors Rao, Rama V. N.; Zhu, Zheny; Burns, Daniel R.; Toksoz, M. Nafi en_US


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