Summary

Time-lapse seismic monitoring of hydrocarbon reservoirs has been successfully applied to monitor fluid saturation changes in petroleum exploration. This technique can also be applied to environmental projects to monitor the sequestration of CO2 in a reservoir. Under most reservoir conditions, the CO2 can exist in the gaseous, liquid, or supercritical fluid (SCF) phase, depending on the reservoir pressure and temperature. The different phases of CO2 have different physical properties. These are also different from the properties of most hydrocarbons and brines. We have implemented a stochastic rock physics model and high-speed ray-Born seismic modeling to examine the seismic response of liquid and SCF CO2 injection into a brine saturated reservoir.

Keywords:
co 2, critical temperature, hydrocarbon reservoir, scf co 2, saturation, liquid co 2, injection, brine, sequestration, subsurface storage
Subjects:
Reservoir Characterization, Formation Evaluation & Management, Storage Reservoir Engineering, Seismic processing and interpretation, Seismic (four dimensional) monitoring, CO2 capture and sequestration
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2001. Society of Exploration Geophysicists
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