A pilot study was initiated to evaluate the feasibility of using legacy 3-D seismic time-lapse analysis as a reservoir monitoring tool to assist planning future development in a shallow oil and gas field in the Gulf of Mexico. The reservoir selected for initial evaluation was the shallowest of a series of stacked oil and gas pays. This choice was based on seismic data quality and the desire to eliminate any possible effects of production in overlying reservoirs.

The target reservoir produces gas from a faulted anticlinal trap at a depth of about 3000 ft, is normally pressured, and exhibits a...

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