Modeling the Long-Term Isolation Performance of Natural and Engineered Geologic CO2 Storage Sites.

Johnson, J. W. ; Nitao, J. J. ; Morris, J. P.

Technical Information Center Oak Ridge Tennessee

关键词: Carbon dioxide;    Storage;    Predictive models;    Geochemistry;    Isolation;   

RP-ID  :  DE200515014513

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

The success of engineered geologic carbon dioxide storage hinges on our ability to identify optimal sites and forecast their long-term security. This ability, in turn, relies upon predictive models for assessing the relative effectiveness of carbon dioxide migration and sequestration processes (isolation performance) as a function of key target-formation and cap-rock properties (screening criteria). Our recent modeling work has focused on applying our unique computational toolbox to address this central issue of long-term hydrodynamic seal capacity in geologic carbon dioxide storage sites. In the present contribution, we review the methodology and fundamental results of this research; i.e., the reactive transport modeling approach, geochemical and geomechanical contributions to cap-rock permeability evolution during and after carbon dioxide influx, and a new conceptual framework for evaluating the net impact on long-term cap rock integrity of these contributions.