An integrated rock/fluid physics and reservoir modeling process relates changes in fluid pressure and composition to changes in the seismic properties of the reservoir. Through calibration of the model with petrophysical relations, a quantitative interpretation of time-lapse seismic data is made. At Weyburn Field this process is used successfully to track a miscible CO2 flood. In further research, the forward model developed in this work could be extended to joint inversion of production and seismic data.
Weyburn Field is a fractured carbonate reservoir in the Williston Basin, Southern Saskatchewan (Churcher and Edmonds, 1994). The field is large, with 1.4 billion barrels of oil in place and to-date recovery of 24%. To improve oil recovery, a miscible CO2 flood is underway.
