4D using legacy seismic data on the Alwyn North oil field

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doi: 10.1144/1354-079302-538
Authors:Hubans, C.; Rapin, M.; Ottle, J. F.; Manin, M.; Harker, S. D.; Richardson, G.; Cooper, R.
Author Affiliations:Primary:
TotalFinaElf, Pau, France
CGG, France
TotalFinaElf Exploration UK PLC, United Kingdom
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.15-24. Publisher: Geological Society Publishing House, London, United Kingdom. ISSN: 1354-0793
Publication Date:2003
Note:In English. 10 refs.; illus., incl. sects., 2 tables, geol. sketch maps
Summary:This paper presents the results of 4D (time-lapse) seismic analysis of the westerly dipping Brent Group fault blocks of Alwyn North, a TotalFinaElf oil field located in the northern North Sea. Two legacy 3D surveys were used; one shot in 1980-1981, the second in 1996 with different sources, shooting directions and other acquisition and processing parameters. The Brent reservoir is of Middle Jurassic age, Alwyn North burial depths are in excess of 3000 m and oil production commenced in 1987. Careful processing and imaging of the amplitudes from the two surveys produced a visual qualitative comparison with hydrocarbon production, water injection and fluid movement within the reservoir. The 4D results show a close correspondence to the sweep determined by reservoir simulation after nine years of production and confirmed by well results. A third 3D survey was acquired in 2001, following commencement of miscible gas injection, and further 4D work is planned to follow on from the encouraging results of the present study.
Sections:Physical properties of rocks and minerals
Subjects:Bajocian; Brent Group; Enhanced recovery; Four-dimensional models; Geophysical methods; Jurassic; Mesozoic; Middle Jurassic; Oil and gas fields; Petroleum; Petroleum engineering; Seismic methods; Time factor; Atlantic Ocean; North Atlantic; North Sea; Alwyn North Field
Coordinates:N510000 N611000 E0110000 W0040000
Abstract Numbers:03M/4913
Record ID:2003060918
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from The Geological Society, London, London, United Kingdom
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