F-01 THE USE OF 4D SEISMIC IN RESERVOIR MANAGEMENT J MARCUS MARSH GRAEME BAGLEY ANDREW LEWIS JOHN MCGARRITY 1 Summary In mid 1999 BP acquired a 3-D survey over the West of Shetland area specifically for time-lapse interpretation of the reservoir dynamic behavior over the component fields. This was described at the EAGE meeting last year i . This formed a turning point in BP’s use of 4-D from experimentation to commercial use. The results were very useful in field management and well planning. Before that it had acquired a number of repeat 3-D seismic surveys which in addition to