Iterative joint inversion of P-wave and S-wave crosswell traveltime data

Tieyuan Zhu, Jerry M. Harris

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Joint inversion of multiple geophysical data-sets is promising to reduce uncertainties in independently inverted models. Here, we present an iterative joint inversion approach for P and S traveltime data using cross-gradient function as constraint term. This type of joint inversion scheme links independent inversions through iterations and the cross-gradient function. The primary advantage of this joint inversion strategy is to avoid determining relative weighting of different data-sets. To investigate the performance of this method, we test our algorithm in synthetic examples of P and S traveltime data and field data acquired in west Texas. The results of synthetic example show that the joint inversion significantly reduces the ambiguities of inverted models and improves the identification of boundaries. In results of field data, jointly inverted S velocities have better correlation with P velocities. Moreover, lithologies delineated from Vp/Vs map by joint inversion matches log data very well and also shows clearly a dipping structure below reservoir that was not shown in previous crosswell tomography results.

Original languageEnglish (US)
Title of host publicationSociety of Exploration Geophysicists International Exposition and 81st Annual Meeting 2011, SEG 2011
PublisherSociety of Exploration Geophysicists
Pages479-483
Number of pages5
ISBN (Print)9781618391841
StatePublished - Jan 1 2011
EventSociety of Exploration Geophysicists International Exposition and 81st Annual Meeting 2011, SEG 2011 - San Antonio, United States
Duration: Sep 18 2011Sep 23 2011

Publication series

NameSociety of Exploration Geophysicists International Exposition and 81st Annual Meeting 2011, SEG 2011

Other

OtherSociety of Exploration Geophysicists International Exposition and 81st Annual Meeting 2011, SEG 2011
CountryUnited States
CitySan Antonio
Period9/18/119/23/11

All Science Journal Classification (ASJC) codes

  • Geophysics

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