Making CCS Pay for Itself: Storage Strategies in Geopressured-Geothermal Aquifers

摘要

Development of the current approach to carbon capture and sequestration from coal-fired power plants has several technical, environmental and economic constraints. Production of brine while storing CO2 in the aquifer greatly mitigates some of the technical and environmental difficulties. In the case of geopressured-geothermal aquifers, brine production can yield methane and geothermal energy that exceeds the energy required for the capture and storage process. A reservoir simulation study was performed on a simple geopressured-geothermal aquifer model to investigate the amount of produced energy versus amount of stored CO2. The power requirements for CO2 capture and pressurization of injected CO2 and brine were compared to the power that could be achieved from produced energy.