A new approach for weak time-lapse anomaly detection using seismic attributes: Geology and production data integrated monitoring of miscible EOR-CO2 flood in carbonates

Abdelmoneam E. Raef*, Richard D. Miller, Alan P. Byrnes, Evan K. Franseen, W. Lynn Watney, William E. Harrison

*Corresponding author for this work

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

3 Citations (Scopus)

Abstract

Since the emergence of time-lapse, TL, seismic technology as a viable element of reservoir management, monitoring production and enhanced oil recovery programs, in carbonates, has been very challenging. Coupled effects of complicated petro-physical and/or lithofacies heterogeneities “difficult to model or image,” low compressibility “high stiffness,” and thinness of carbonates have made seismic monitoring a high-risk component of EOR programs requiring both highly repeatable 4D-seismic acquisition and weak anomaly-sensitive processing and interpretation approaches. Most important is the need to maximize interdisciplinary synergy among all reservoir management team members. In this study, we present a new non-differencing approach called “Parallel Progressive Blanking” (PPB) for detecting time-lapse seismic attributes anomalies. This approach is more efficient than differencing TL attributes and/or data in cases where weak anomalies are concealed by non-repeatable noise. Four 4D-seismic datasets, interpreted seismic lineaments, seismic facies, sedimentological models and production data provided a means of testing and validating the PPB approach of interpreting weak TL-seismic attributes of anomalous zones observed during a miscible EOR-CO2 flood. Using four TL-seismic datasets and applying the PPB approach, we have successfully monitored changes in seismic response related to the miscible EOR-CO2 bank in the Hall-Gurney Field in Kansas. A predicted “via reservoir simulation” CO2 breakthrough in April, 2004 in well 12 and an unpredicted delayed response from well 13 have been in compliance with the interpreted spatial outline of the injected CO2 bank. Changes in pump strategies between two seismic surveys resulted in retreating of the CO2 plume. Relatively fine (two months) survey-to-survey time spacing has assisted qualitative estimation of both reservoir heterogeneity and robustness of implementing the PPB approach, furthermore, dynamic flood management was aided by TL-findings.

Original languageEnglish
Title of host publicationSociety of Exploration Geophysicists - 75th SEG International Exposition and Annual Meeting, SEG 2005
PublisherSociety of Exploration Geophysicists
Pages2426-2429
Number of pages4
ISBN (Print)9781604236101
Publication statusPublished - 2005
Externally publishedYes
Event75th Society of Exploration Geophysicists International Exposition and Annual Meeting, SEG 2005 - Houston, United States
Duration: Nov 6 2005Nov 11 2005

Publication series

NameSociety of Exploration Geophysicists - 75th SEG International Exposition and Annual Meeting, SEG 2005

Conference

Conference75th Society of Exploration Geophysicists International Exposition and Annual Meeting, SEG 2005
Country/TerritoryUnited States
CityHouston
Period11/6/0511/11/05

ASJC Scopus subject areas

  • Geophysics

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