Advanced Search
DSpace@MIT

Effects of source mismatch on multipole Logging

Research and Teaching Output of the MIT Community

Show simple item record

dc.contributor.author Byun, Joongmoo
dc.contributor.author Toksoz, M. Nafi
dc.contributor.author Rao, Rama V. N.
dc.contributor.other Massachusetts Institute of Technology. Earth Resources Laboratory en_US
dc.date.accessioned 2012-01-20T18:46:17Z
dc.date.available 2012-01-20T18:46:17Z
dc.date.issued 2004
dc.identifier.uri http://hdl.handle.net/1721.1/68622
dc.description.abstract The effects of mismatched multipole sources were investigated. Multipole sources considered here are those that they are constructed of monopoles with appropriate sign combination. To simulate mismatched dipole and quadrupole sources, we made the amplitude of one of monopoles smaller than those of the other monopoles. The dipole and quadrupole component were obtained with four monopole receiver array system by subtracting or adding appropriate responses. Mismatched dipole source excites nondipole modes in addition to the flexural mode. The strongest of these is the Stoneley mode, whose amplitude increases with increasing mismatch. Similarly, mismatched quadrupole sources produce nonquadrupole modes such as the Stoneley mode in addition to the screw mode. The amplitude of the Stoneley mode increases with mismatch. However, we can obtain the flexural mode by A-C and the screw mode by A-B+C-D processing, respectively. The Stoneley mode, which has the same amplitude at the same radial position from the borehole axis, is cancelled out by A-C and A-B+C-D processing as long as the tool is placed at the center of the borehole. en_US
dc.description.sponsorship Massachusetts Institute of Technology. Earth Resources Laboratory 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;2004-11
dc.title Effects of source mismatch on multipole Logging en_US
dc.type Technical Report en_US
dc.contributor.mitauthor Byun, Joongmoo
dc.contributor.mitauthor Toksoz, M. Nafi
dc.contributor.mitauthor Rao, Rama V. N.
dspace.orderedauthors Byun, Joongmoo; Toksoz, M. Nafi; Rao, Rama V. N. en_US


Files in this item

Name Size Format Description
BYUN.pdf 1.970Mb PDF

This item appears in the following Collection(s)

Show simple item record

MIT-Mirage