Feasibility of Inverting 3-D FTG Data for Reservoir Monitoring

A-28 FEASIBILITY OF INVERTING 3-D FTG DATA FOR RESERVOIR MONITORING 1 Abstract Three-Dimensional Full Tensor Gradiometry (3-D FTG) acquisition system takes ultra sensitive realtime measurements of small gravity changes (gradients) caused by density differences in all directions. We have undertaken a numerical examination of the feasibility of using this system for reservoir monitoring. Special gravity modeling and inversion algorithms that can describe and predict the dynamic behavior of a hydrocarbon reservoir have been developed and tested on synthetic FTG data based on realistic 4-D petrophysical models. Our inversion yields estimates of uncertainty in hydrocarbon production data. Results show that the