Constraining the petro-elastic model with a flatlander's interpretation of the 4d signal

E. Alvarez, C. MacBeth

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

Abstract

An analytic formulation is obtained that relates mapped time-lapsed seismic amplitudes and time-delays directly to the sum of reservoir pressure and saturation changes weighted by the principal groups of controlling parameters from the petroelastic model. Application to data from the North Sea and West Africa provides insight into how the petroelastic model controls the seismic response and the relative interplay between pressure and saturation changes for each reservoir type. These data, together with published literature examples, allow the identification of regions in the reservoir where the saturationdriven 4D signature dominates over the pressure-driven, or vice-versa. These observations are used to determine a simple constraint on the relative magnitude of the controlling groups of petroelastic model parameters. It is concluded that the evaluation of 4D seismic as saturation-or pressure-dominated is a key measurement for our understanding of the in situ petroelastic model.

Original languageEnglish
Title of host publication74th European Association of Geoscientists and Engineers Conference and Exhibition Incorporating EUROPEC 2012
PublisherEAGE Publishing BV
Pages2336-2341
Number of pages6
ISBN (Electronic)9789073834279
DOIs
Publication statusPublished - 4 Jun 2012
Event74th European Association of Geoscientists and Engineers Conference and Exhibition 2012 Incorporating SPE EUROPEC 2012 - Copenhagen, Denmark
Duration: 4 Jun 20127 Jun 2012

Conference

Conference74th European Association of Geoscientists and Engineers Conference and Exhibition 2012 Incorporating SPE EUROPEC 2012
CountryDenmark
CityCopenhagen
Period4/06/127/06/12

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geotechnical Engineering and Engineering Geology

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