4D Seismic for Oil Rim Monitoring

A-03 4D SEISMIC FOR OIL RIM MONITORING Abstract 1 4D or time-lapse seismic methods are now being routinely used throughout Shell to monitor fluid movements in producing fields. In most cases 4D seismic data has been used to track the displacement of a single hydrocarbon phase by displacing water or to measure pressure changes. However the seismic response to fluid movements becomes considerably more complex when three fluid phases are involved. The problem is further complicated in fields with thin oil rims where the seismic response from the gas-oil contact (GOC) interferes with the seismic response from the oil-water contact