Seismic monitoring of pressure depletion evaluated using azimuthal AVO data?

Faisal Al-Kindi, Colin MacBeth, Asghar Shams

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

Abstract

Azimuthal AVO is investigated as a possible tool for time-lapse monitoring of pressure depletion in reservoirs for which fluid replacement or the signature due to fluid movement is negligible. A feasibility study is carried out for both onshore and offshore acquisitions, which have non-repeatable geometries between the baseline and monitor surveys. Modeling, followed by anisotropy estimation reveals that lack of repeatability between the different survey vintages as a significant challenge, particularly in the presence of background noise. The condition of a repeatable geometry is more critical than for the P-P stacked response. For the geometry data used in this study, anisotropy estimates rapidly become unstable when pre-stack noise levels exceed 3 to 5 percent. Pressure drops in the reservoir must exceed 15 MPa in maximum fold areas for the OBC survey, and 7 MPa onshore, to permit detection of the corresponding anisotropy changes. The study suggests constraint using production data is necessary for more accurate resolution of pressure changes.

Original languageEnglish
Title of host publicationSEG Technical Program Expanded Abstracts 2006
PublisherSociety of Exploration Geophysicists
Pages3220-3224
Number of pages5
ISBN (Print)9781604236972
DOIs
Publication statusPublished - 2006
Event76th Society of Exploration Geophysicists International Exposition and Annual Meeting - New Orleans, Louisiana, United States
Duration: 1 Oct 20066 Oct 2006

Conference

Conference76th Society of Exploration Geophysicists International Exposition and Annual Meeting
CountryUnited States
CityNew Orleans, Louisiana
Period1/10/066/10/06

ASJC Scopus subject areas

  • Geophysics

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  • Cite this

    Al-Kindi, F., MacBeth, C., & Shams, A. (2006). Seismic monitoring of pressure depletion evaluated using azimuthal AVO data? In SEG Technical Program Expanded Abstracts 2006 (pp. 3220-3224). Society of Exploration Geophysicists. https://doi.org/10.1190/1.2370199