期刊
13TH INTERNATIONAL CONFERENCE ON GREENHOUSE GAS CONTROL TECHNOLOGIES, GHGT-13
卷 114, 期 -, 页码 3193-3201出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.egypro.2017.03.1449
关键词
geomechanics; coupled model; fracture; permeability; leakage; cap rock; CO2
资金
- European Commission FP7 project MIRECOL [608608]
- Statoil
- ENGIE
- Shell
Cap-rock integrity is of paramount importance during injection and subsequent long-term storage of CO2 in the subsurface. Preexisting (natural) and man-induced fractures in the cap rock represent potential flow paths out of the storage formation. In this study, a first-order semi-analytical model of flow through a vertical fracture penetrating cap rock is constructed taking the stress-dependent fracture permeability into account. The model is then applied to study the effects of in-situ stress normal to fracture on the flow rate through the fracture. The flow rate increases nonlinearly with the reservoir pressure, which is due to a combined effect of nonlinear fracture deformation law and the cubic law governing the flow rate. (C) 2017 The Authors. Published by Elsevier Ltd.
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