Absolute and Relative Gravity Integration for High Precision 4D Reservoir Monitoring

A-26 ABSOLUTE AND RELATIVE GRAVITY DATA INTEGRATION FOR HIGH PRECISION 4D RESERVOIR MONITORING 1 Based on an estimate 3µGals per 1cm. EAGE 65th Conference & Exhibition — Stavanger Norway 2 - 5 June 2003 1 Abstract In October 2002 BP Exploration Alaska (BPXA) the primary operator of the Prudhoe Bay Oil Field began a large-scale water injection program to counter decreasing pressure on the Prudhoe Bay gas cap. To monitor the progress of the injection program surface gravity measurements will be taken once per year. Reservoir models require total measurement uncertainty to be better than ±10µGals a challenging specification to