An Approach to Simulating the Effects of Water-induced Compaction in a north Sea Reservoir

摘要

Rock-compaction drive under waterflood re-pressurization has not bene accounted for previously in our flow-model studies for a Valhall waterflood. However, field observations form pilot water- Floods indicate an increase in permeability with the injection of Cool seawater into the chalk formation. Platform subsidence meas- Urements taken during the pilot waterflood also provide evidence Of a chalk/water interaction. Laboratory experiments on reservoir Core samples indicate an accelerated compaction effect as the flood Front passes through the sample. To assess the value of a large- Scale waterflood at Valhall, we have developed a new approach to Simulate the possible effects of water-induced rock compaction in Our black-oil flow models.