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dc.contributor.authorSun, B.
dc.contributor.authorBona, Andrej
dc.contributor.authorKing, A.
dc.contributor.authorZhou, B.
dc.date.accessioned2017-03-17T08:29:40Z
dc.date.available2017-03-17T08:29:40Z
dc.date.created2017-02-19T19:31:44Z
dc.date.issued2014
dc.identifier.citationSun, B. and Bona, A. and King, A. and Zhou, B. 2014. A comparison of coherency measurement using semblance and multiple signal classification, from a seismic-while-drilling perspective. Geophysics. 80 (3): pp. KS27-KS39.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/51099
dc.identifier.doi10.1190/GEO2014-0079.1
dc.description.abstract

© 2015 Society of Exploration Geophysicists.A diamond drill bit is usually considered to be an inadequate seismic vibration source. To detect and use weak drillbit-generated seismic wavefields in hard-rock drilling, we compared different coherency measures between a conventional method of semblance and a generalized multiple signal classification (MUSIC) algorithm. We tested the detectability and resolution differences between semblance and MUSIC with synthetic examples. MUSIC coherency has the advantage of higher resolution over semblance measurement when the source wavefronts are accurately predicted. In addition, we applied both methods to detect the coherent moveout of a diamond drill-bit signal from a hard rock seismic-whiledrilling experiment at Hillside, South Australia. We used the coherent moveout to estimate the overburden velocity around the borehole. We also performed interferometry migration using the coherency measurements to image the drillit position. Our analysis determined that the direct waves generated from a diamond drill bit at shallow depths can be successfully detected, allowing drill-bit imaging and the determination of formation velocity around the borehole.

dc.publisherSociety of Exploration Geophysics
dc.titleA comparison of coherency measurement using semblance and multiple signal classification, from a seismic-while-drilling perspective
dc.typeJournal Article
dcterms.source.volume80
dcterms.source.number3
dcterms.source.startPageKS27
dcterms.source.endPageKS39
dcterms.source.issn0016-8033
dcterms.source.titleGeophysics
curtin.departmentDepartment of Exploration Geophysics
curtin.accessStatusFulltext not available


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