Time-lapse seismic observations of regional gas blowdown at Teal South

Document Type

Conference Proceeding

Publication Date

1-1-2012

Abstract

© 2012 SEG. In the late 1990's, a consortium studied ocean-bottom time-lapse seismic data from an oil field in the Gulf of Mexico. One set of observations suggested that nearby reservoirs, not under production, were affected adversely by production from one reservoir, through the regional decline in pressure, which was communicated through the water sands connecting these reservoirs via circuitous routes. The present study uses time-slices through the individual time-lapse volumes of instantaneous amplitude and their difference volume, providing a more-detailed spatial study than the initial study. We find direct evidence for the escape of hydrocarbons from one of the neighboring reservoirs and for the intrusion of water at the base of the producing reservoir. This supports many aspects of the original study, and suggests that monitoring for regional gas blow-down may be practical.

Publication Title

Society of Exploration Geophysicists International Exposition and 82nd Annual Meeting 2012, SEG 2012

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