Numerical study of underground CO2 storage and the utilization in depleted gas reservoirs
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Beschreibung
Carbon capture and storage (CCS) is considered as the most promising technology for slowing down the atmospheric CO2 emissions. However, CCS has not been implemented on large scale because of the related risks and the lack of financial incentives. Regarding the risks associated with CCS, a parametric uncertainty analysis for CO2 storage was conducted and the general roles of different key geomechanical and hydrogeological parameters in response to CO2 injection were determined, which is beneficial for guiding time and effort spent mitigating the uncertainty to acquire trustworthy model forecasts and risk assessments. Regarding the financial incentives of CCS, co-injection of CO2 with impurities associated with enhanced gas recovery was analyzed, which is advantageous for decreasing the cost on gas separation and generating additional economic profit. In addition, the utilization of CO2 as cushion gas in the underground gas storage reservoir was proposed and analyzed, which can also be beneficial for improving the cost-effectiveness of CCS. Overall, this thesis is advantageous for promoting the application of CCS on large scale and mitigating the atmospheric CO2 emissions.
Autor*in
Cheng Cao
Themen in »Numerical study of underground CO2 storage and the utilization in depleted gas reservoirs«
Numerical simulation, THM coupling, TOUGH2MP-FLAC3D CO2 storage, CCS, CCUS, Multi-Phase Porous flow, Depleted gas reservoirs Uncertainty analysis, Distance correlation, Support vector regression Impurity gas, CO2-EGR, Natural gas storage, Cushion gas Numerische Simulation, THM-Kopplung, TOUGH2MP-FLAC3D CO2-Speicherung, CCS, CCUS, mehrphasig, poröser Fluss erschöpfte Gasspeicher, Unsicherheitsanalyse, Entfernungskorrelation Stützvektorregression, Verunreinigungsgas, CO2-EGR Erdgasspeicherung, Kissen Gas, Dämpfungsgas, Verunreinigung Erdgas, natural gas, Energiespeicher, energy storage, gas recovery Kohlenstoff, carbon, global warming, climate change, Klimawandel gas storage, Gasspeicher, pollution, Emissionen, Emissionenverlangsamung emissions slowdown, Kohlenstoffkreislaufwirtschaft circulation carbon economy