SWLGS Luncheon Topics
Updated Oct. 5, 2006
The Auger 4D Case Study: Exploiting A Gulf of Mexico Turbidite Field By The Use Of Time Lapsed Seismic Surveys
Jim Bikun, Tom Kratochvil, Charles Tixier, Helena Zirczy; Shell Exploration & Production Company, Inc.
Tim Beattie, Pete Bilinski, Elli Tchouparova, Klaas van Luik, Sid Weaver; Shell International Exploration & Production, Inc.
At Auger, Garden Banks 426 Field, Shell developed a succession of premier deepwater
Integration of 4D seismic snapshots with other surveillance tools illustrates the influx of the aquifer into the producing sands during the field’s productive life. Production logging in a dedicated monitor well in conjunction with 4D drainage snapshots reveal distinct vertical flow boundaries and potential bypassed hydrocarbons in the Pink (“S” Sand) reservoir. Recent drilling of the A-5ST validates the presence of bypassed Pink hydrocarbons and 4D expectations. Geochemical analysis, 4D analysis, and production logging indicates a production induced communication between geologically isolated sands in the O series sands. 4D snapshots also demonstrate a directionally controlled aquifer influx caused by seismically visible stratigraphic boundaries within the Yellow (“N” Sand) reservoir.
Redevelopment opportunities remaining at Auger as seen from 4D snapshots include: (1) undrained attic hydrocarbons, (2) unswept downdip and laterally isolated hydrocarbons, and (3) newly delineated deeper reservoir potential, illuminated when the overlying bright spots dimmed with production. Opportunities are being further evaluated to assess development options and economic viability.
Tom Kratochvil is a Senior Staff Geophysicist for Shell Oil Co., and has worked in