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Title: Verification of velocity-resistivity relationships derived from structural joint inversion with borehole data
Authors: Moorkamp, Max
Roberts, A. W.
Jegen, M.
Heincke, B.
Hobbs, R. W.
First Published: 23-Jul-2013
Publisher: American Geophysical Union (AGU)
Citation: Geophysical Research Letters, 2013, 40 (14), pp. 3596-3601
Abstract: We present results of three-dimensional joint inversion of seismic, magnetotelluric, and gravity data over a marine salt dome. Such structures are difficult to image with a single method, and our results demonstrate how combining different techniques can yield improved results. More importantly, we examine the reliability of velocity-conductivity relationships derived from structure-coupled joint inversion approaches. Comparison with a seismic reflection section shows that our models match the upper limit of the salt. Furthermore, velocity and resistivity logs from a borehole drilled into the salt dome's flank match, within error, those recovered by the inversion. The good match suggests that the difference in length scale does not have a significant effect in this case. This provides a strong incentive to incorporate borehole data into the joint inversion in the future and substantiates approaches that use the relationships derived from joint inversion models for lithological classification.
DOI Link: 10.1002/grl.50696
ISSN: 0094-8276
eISSN: 1944-8007
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2013, American Geophysical Union. Deposited with reference to the publisher’s archiving policy available on the SHERPA/RoMEO website.
Appears in Collections:Published Articles, Dept. of Geology

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