Improved reservoir modelling with time-lapse seismic data in a Gulf of Mexico gas condensate reservoir

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doi: 10.1144/1354-079302-512
Authors:Waggoner, J. R.; Cominelli, A.; Seymour, R. H.; Stradiotti, A.
Author Affiliations:Primary:
WesternGeco, Reservoir Services, West Sussex, United Kingdom
ENI/Agip Division, Italy
Imperial College, United Kingdom
Agip Petroleum, Houston, TX, United States
Volume Title:4D seismic technology
Volume Authors:Parker, J. R.; Bertelli, L.; Dromgoole, P.
Source:4D seismic technology, J. R. Parker, L. Bertelli and P. Dromgoole. Petroleum Geoscience, 9(1), p.61-71. Publisher: Geological Society Publishing House, London, United Kingdom. ISSN: 1354-0793
Publication Date:2003
Note:In English. 10 refs.; illus.
Summary:Time-lapse 3D- or 4D-seismic data have been tried in several fields to date, with some good case studies published to demonstrate the utility of the 4D seismic information. While another 4D case study would be useful, this paper describes two novel aspects of a recent application in the Gulf of Mexico. First, the target reservoir contains a gas condensate fluid under primary depletion, so pressure, rather than saturation, changes create the observed 4D acoustic response. Further, the primary impact of the pressure change is to the fluid composition as the initially dense gas phase lightens as condensate drops out below the dew point. The result was a 2.8% change in acoustic impedance predicted in the feasibility study. Second, the 4D seismic result was used to constrain an optimized history-matching procedure, along with the production data. After describing the method used, the paper will discuss the changes to the reservoir model that resulted. While the results should not be considered unique, they do give some insight into the structure of the reservoir that should be considered for optimal reservoir management.
Sections:Physical properties of rocks and minerals
Subjects:Acoustical properties; Body waves; Condensates; Elastic waves; Four-dimensional models; Geophysical methods; Natural gas; Optimization; P-waves; Petroleum; Petroleum engineering; Porosity; Reservoir properties; Seismic methods; Seismic waves; Simulation; Three-dimensional models; Atlantic Ocean; Gulf of Mexico; North Atlantic; Grand Isle Field
Abstract Numbers:03M/4918
Record ID:2003060923
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from The Geological Society, London, London, United Kingdom
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