Coupled Carbon Dioxide Sequestration and Energy Production From Geopressured/Geothermal Aquifers
- Reza Ganjdanesh (University of Texas at Austin) | Steven Bryant (University of Texas at Austin) | Raymond Orbach (University of Texas at Austin) | Gary Pope (University of Texas at Austin) | Kamy Sepehrnoori (University of Texas at Austin)
- Document ID
- Society of Petroleum Engineers
- SPE Journal
- Publication Date
- April 2014
- Document Type
- Journal Paper
- 239 - 248
- 2013. Society of Petroleum Engineers
- 4.1.2 Separation and Treating, 5.9.2 Geothermal Resources, 5.1.5 Geologic Modeling, 4.1.5 Processing Equipment, 5.10.1 CO2 Capture and Sequestration, 5.5 Reservoir Simulation, 7.4.4 Energy Policy and Regulation, 6.5.3 Waste Management
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The current approach to carbon capture and sequestration (CCS) frompulverized-coal-fired power plants is not economically viable without eitherlarge subsidies or a very high price on carbon. Current schemes require roughlyone-third of a power-plant's energy for carbon dioxide (CO2) captureand pressurization. The production of energy from geopressured aquifers hasevolved as a separate, independent technology from the sequestration ofCO2 in deep, saline aquifers. A game-changing new idea is describedhere that combines the two technologies and adds another--the dissolution ofCO2 into extracted brine that is then reinjected. A systematicinvestigation covering a range of conditions was performed to explore the beststrategy for the coupled process of CO2 sequestration and energyproduction. Geological models of geopressured/geothermal aquifers weredeveloped with available data from studies of Gulf Coast aquifers. Thesegeological models were used to perform compositional reservoir simulations ofrealistic processes with coupled aquifer and wellbore models.
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