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