Estimation of presuure and saturation changes from 4D seismic AVO and time shift analysis
conference paper
An inversion scheme that solves for reservoir pressure and fluid saturation changes from time-lapse prestack seismic attributes and post-stack seismic timeshifts is presented. It makes use of three equations expressing the production induced changes as a function of changes in zero-offset and gradient reflectivity and of compressional wave time-shifts. The equations related to the AVO (amplitude-versus-offset) response are a revised form of Landro's (2001) equations. The inversion scheme has been successfully tested on a synthetic reservoir where seismic data have been modeled before and after two years production. The results show that changes in fluid properties can be approximated with fairly high accuracy.
Topics
TNO Identifier
280027
ISBN
9781605604749
Source title
70th European Association of Geoscientists and Engineers Conference and Exhibition - Incorporating SPE EUROPEC 2008, 9 June 2008 through 12 June 2008, Rome. Conference code: 78169
Pages
1163-1167
Files
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