TOUGH-RDCA modeling of multiple fracture interactions in caprock during CO2 injection into a deep brine aquifer
文献类型：期刊论文
| 作者 | Feng, Xia-Ting2 ; Pan, Peng-Zhi1,2; Rutqvist, Jonny1; Yan, Fei2
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| 刊名 | COMPUTERS & GEOSCIENCES
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| 出版日期 | 2014 |
| 卷号 | 65页码:24-36 |
| 关键词 | RDCA TOUGH2 Multiple fractures interaction CO2 sequestration Fracture propagation |
| ISSN号 | 0098-3004 |
| DOI | 10.1016/j.cageo.2013.09.005 |
| 英文摘要 | The interaction between multiple fractures (e.g., hydraulic fractures and pre-existing natural fractures) is important in the analysis of a number of geoengineering applications, such as in the evaluation of the stability and integrity of caprock during underground CO2 sequestration. Here, we present new developments and applications of a model for analyzing coupled multiphase fluid flow and geomechanical processes during fracturing involving multiple fractures and their interactions. Based on a numerical code, i.e., rock discontinuous cellular automaton (RDCA), we introduce a discontinuous displacement function for representing multiple discontinuities, and develop an algorithm to deal with a propagating fracture that interacts with other discontinuities. By applying multiphase fluid pressure to fracture surfaces, the RDCA has the ability to simulate multiphase fluid flow-driven fracturing. The RDCA technique incorporates the discontinuity of the crack independently of the mesh, such that the cracks can be arbitrarily located within an element. This method does not require any remeshing for multiple cracks growth, an aspect that greatly reduces the complexity and improves efficiency in modeling multiple-fracture propagation. The RDCA is integrated with the TOUGH2 multiphase flow and heat-transport simulator by a sequential coupling algorithm, using mixed FORTRAN and C+ + programming. The coupled TOUGH2 and RDCA code is applied to simulate the multiple fracture interaction in caprock induced by CO2 injection into a deep brine aquifer. The simulation results show hydraulic fracture trajectory, fracture aperture, and pressures as a function of injection time. Fluid flow (driven by CO2 injection) into natural fractures and their transition to hydraulic fractures is simulated. The injection pressure profile shows the complexity of the fracturing and its impact on CO2 migration and caprock integrity. (C) 2013 Elsevier Ltd. All rights reserved. |
| WOS研究方向 | Computer Science ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000334005700004 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/3584]  |
| 专题 | 岩土力学所知识全产出_期刊论文 岩土力学所知识全产出 国家重点实验室知识产出_期刊论文 |
| 作者单位 | 1.Univ Calif Berkeley, Lawrence Berkeley Natl Lab 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; |
| 推荐引用方式 GB/T 7714 | Feng, Xia-Ting,Pan, Peng-Zhi,Rutqvist, Jonny,et al. TOUGH-RDCA modeling of multiple fracture interactions in caprock during CO2 injection into a deep brine aquifer[J]. COMPUTERS & GEOSCIENCES,2014,65:24-36. |
| APA | Feng, Xia-Ting,Pan, Peng-Zhi,Rutqvist, Jonny,&Yan, Fei.(2014).TOUGH-RDCA modeling of multiple fracture interactions in caprock during CO2 injection into a deep brine aquifer.COMPUTERS & GEOSCIENCES,65,24-36. |
| MLA | Feng, Xia-Ting,et al."TOUGH-RDCA modeling of multiple fracture interactions in caprock during CO2 injection into a deep brine aquifer".COMPUTERS & GEOSCIENCES 65(2014):24-36. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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