Monitoring of Reservoir Fluids Movement Based on Time-Lapse Microgravity Observations

B24 Monitoring of Reservoir Fluids Movement Based on Time-Lapse Microgravity Observations J. Mrlina* (Geophysical Institute ASCR) SUMMARY Monitoring of fluids in reservoirs has become an essential tool for the control of the development of hydrocarbon fields. Repeated microgravity measurements can determine especially gas-water or gas-oil contact displacement in time. Gravity modelling was performed to test such gravity monitoring effectiveness in case of gas storage and various cases of gas-water movement in reservoirs (pumping water-flooding etc.). The size of the gassaturated part of a reservoir sequence was changed in various directions as well as depth porosity and density contrasts between fluids.