Abstract

Reservoir pressure is a fundamental property of the reservoir and its depletion provides an insight in to the reservoir dynamics and drainage pattern. Reservoirs under geological condition in general have more preferred drainage path such as long axis or the fold axis compared to its orthogonal trend. This is expected as the fold axis follows a stress trend which is related to the facies distribution along and perpendicular to this axis. Post production pressure measurement at different part of the reservoir against zone of production can provide valuable data to understand the differential reservoir drainage. In one of the fields in western offshore of India, MDT pressures in different wells drilled at different times during field production provides valuable information to the drainage pattern and the depletion trend along various direction gives insight into the differential drainage as result of possible different flow zones . The pressure trends in turn provide an important input for reservoir simulation.