Uncertainty quantification for evaluating the impacts of fracture zone on pressure build‐up and ground surface uplift during geological CO2 sequestration

Jie Bao, Zhangshuan Hou, Yilin Fang, Huiying Ren and Guang Lin

Greenhouse Gases: Science and Technology, 2015, vol. 5, issue 3, 254-267

Abstract: A series of numerical test cases reflecting broad and realistic ranges of geological formation and fracture zone properties was developed to systematically evaluate the impacts of fracture zone on pressure build‐up and ground surface uplift during CO2 injection. Numerical test cases were conducted using a coupled hydro‐geomechanical simulator, eSTOMP‐RBSM (extreme‐scale Subsurface Transport over Multiple Phases, rigid‐body‐spring model). For efficient sensitivity analysis and reliable construction of a reduced‐order model, a quasi‐Monte Carlo sampling method was applied to effectively sample a high‐dimensional input parameter space to explore uncertainties associated with hydrologic properties. The uncertainty quantification results show that the impacts on geomechanical response from the fracture zone mainly depend on reservoir and fracture zone permeability. When the fracture zone permeability is two to three orders of magnitude smaller than the reservoir permeability, the fracture zone can be considered as an impermeable block that resists fluid transport in the reservoir, which causes pressure increase near the fracture zone. When the fracture zone permeability is close to the reservoir permeability, or higher than 10−15 m2 in this study, the fracture zone can be considered as a conduit that penetrates the caprock, connecting the fluid flow between the reservoir and the upper rock.© 2014 Society of Chemical Industry and John Wiley & Sons, Ltd

Date: 2015
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https://doi.org/10.1002/ghg.1456

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Persistent link: https://EconPapers.repec.org/RePEc:wly:greenh:v:5:y:2015:i:3:p:254-267

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