Coupling 4-D Seismic Monitoring and Reservoir Simulation

John Fanchi
Chevron ETC, Houston, TX

Time-lapse (4D) seismic can be effectively integrated into the reservoir management process by combining the calculation of reservoir geophysical attributes with the reservoir flow simulation. This is achieved by embedding a petroelastic algorithm to calculate reservoir geophysical attributes (P-wave and S-wave velocities and impedances) directly within the flow simulator. Embedded petroelastic models can facilitate integration of 4D seismic in reservoir management; improve the overall efficiency of the 4D processing and interpretation cycle; better engage simulation engineers in the use of 4D seismic; and increase shelf life of production forecasts through better reservoir characterization and more reliable dynamic modeling. Examples will illustrate how this workflow may be used to assess the feasibility of conducting a time-lapse seismic survey, monitor fluid movement, determine the optimum time to schedule 3D seismic surveys for use in time-lapse seismic studies, improve reservoir characterization, make informed operational changes, and verify geologic sequestration of gases.

AAPG International Conference and Exhibition, Cape Town, South Africa 2008 © AAPG Search and Discovery