Time-Lapse Seismic Modeling and Inversion Modeling and Inversion of CO2 Saturation for Sequestration and Enhanced Oil Recovery Final rept. (September 1, 2003-Decembr 31, 2005)

摘要

Injection of carbon dioxide (CO2) into subsurface aquifers for geologic storage/sequestration, and into subsurface hydrocarbon reservoirs for enhanced oil recovery, has become an important topic to the nation because of growing concerns related to global warming and energy security. In this project we developed new ways to predict and quantify the effects of CO2 on seismic data recorded over porous reservoir/aquifer rock systems. This effort involved the research and development of new technology to: (1) quantitatively model the rock physics effects of CO2 injection in porous saline and oil/brine reservoirs (both miscible and immiscible); (2) quantitatively model the seismic response to CO2 injection (both miscible and immiscible) from well logs (1D); and (3) perform quantitative inversions of time-lapse 4D seismic data to estimate injected CO2 distributions within subsurface reservoirs and aquifers.