Multi-component seismic monitoring of CO2 injection at Delhi Field, Louisiana

Time-lapse seismic often gives field wide information about fluid and pressure changes in a producing reservoir. The Reservoir Characterization Project at the Colorado School of Mines has collected two multi-component time-lapse seismic surveys over Delhi Field, Louisiana, USA to monitor CO2 injection into a producing oil reservoir. Multi-component time-lapse seismic data with good repeatability, coupled with rock physics modelling, has led to successful monitoring and interpretation of fluid and pressure changes in the reservoir interval. The combination of P and PS-wave amplitude changes, along with time-shift attributes, gives a clear picture of CO2 effectively sweeping the reservoir at Delhi Field, but also shows that large pressure changes in the western portion of the field have an effect on overburden layers.