System and process for secondary hydrocarbon recovery
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United States of America Patent
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Oct 22, 2002
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N/A
app pub date -
Nov 27, 2000
filing date -
May 12, 1998
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Abstract
A hydrocarbon reservoir undergoing secondary recovery is subject to a first and then at least a second gravity gradient survey in which a gravity gradiometer takes gradient measurements on the surface above the reservoir to define successive data sets. The differences between the first and subsequent gravity gradient survey yields information as to sub-surface density changes consequent to displacement of the hydrocarbon and the replacement thereof by the driveout fluid including the position, morphology, and velocity of the interface between the hydrocarbon to be recovered and the driveout fluid.
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