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dc.contributor.authorPardo, David
dc.contributor.authorMatuszyk, Paweł Jerzy
dc.contributor.authorTorres-Verdín, Carlos
dc.contributor.authorMora Cordova, Angel
dc.contributor.authorMuga, Ignacio
dc.contributor.authorCalo, Victor M.
dc.date.accessioned2015-08-03T10:59:56Z
dc.date.available2015-08-03T10:59:56Z
dc.date.issued2013-02-13
dc.identifier.issn00168025
dc.identifier.doi10.1111/1365-2478.12022
dc.identifier.urihttp://hdl.handle.net/10754/562654
dc.description.abstractWe describe a numerical study to quantify the influence of tool-eccentricity on wireline (WL) and logging-while-drilling (LWD) sonic logging measurements. Simulations are performed with a height-polynomial-adaptive (hp) Fourier finite-element method that delivers highly accurate solutions of linear visco-elasto-acoustic problems in the frequency domain. The analysis focuses on WL instruments equipped with monopole or dipole sources and LWD instruments with monopole excitation. Analysis of the main propagation modes obtained from frequency dispersion curves indicates that the additional high-order modes arising as a result of borehole-eccentricity interfere with the main modes (i.e., Stoneley, pseudo-Rayleigh and flexural). This often modifies (decreases) the estimation of shear and compressional formation velocities, which should be corrected (increased) to account for borehole-eccentricity effects. Undesired interferences between different modes can occur at different frequencies depending upon the properties of the formation and fluid annulus size, which may difficult the estimation of the formation velocities. © 2013 European Association of Geoscientists & Engineers.
dc.description.sponsorshipThe work reported in this paper was funded by the University of Texas at Austin Research Consortium on Formation Evaluation, jointly sponsored by Anadarko, Aramco, Baker-Hughes, BG, BHP Billiton, BP, Chevron, ConocoPhillips, ENI, ExxonMobil, Halliburton, Hess, Marathon, Mexican Institute for Petroleum, Nexen, Pathfinder, Petrobras, Repsol-YPF, RWE, Schlumberger, Statoil, Total and Weatherford. The first author was partially funded by the Spanish Ministry of Sciences and Innovation under project MTM2010-16511, the Laboratory of Mathematics (UFI 11/52) and the Ibero-American Project CYTED 2011 (P711RT0278).
dc.publisherWiley
dc.subjectBorehole
dc.subjectEccentred
dc.subjectWireline
dc.titleInfluence of borehole-eccentred tools on wireline and logging-while-drilling sonic logging measurements
dc.typeArticle
dc.contributor.departmentEarth Science and Engineering Program
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentNumerical Porous Media SRI Center (NumPor)
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalGeophysical Prospecting
dc.contributor.institutionUniversity of the Basque Country (UPV/EHU) and IKERBASQUE (Basque Foundation for Sciences), Bilbao, Spain
dc.contributor.institutionThe University of Texas at Austin, Austin TX, United States
dc.contributor.institutionPontificia Universidad Católica de Valparaíso, Chile
dc.contributor.institutionUniversity of Science and Technology, Kraków, Poland
kaust.personCalo, Victor M.
kaust.personMora Cordova, Angel
dc.date.published-online2013-02-13
dc.date.published-print2013-06


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