Research on random propagation method of hydraulic fracture based on zero-thickness cohesive element
In order to effectively simulate the process of random propagation of hydraulic fractures in fractured shale reservoirs, a new method of random propagation of hydraulic fractures based on the finite element mesh embedded with zero-thickness cohesive elements is proposed. This new method is based on...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SCIENCE PRESS , 16 DONGHUANGCHENGGEN NORTH ST, BEIJING, PEOPLES R CHINA, 100717
2021-01-01
|
| Series: | Rock and Soil Mechanics |
| Subjects: | |
| Online Access: | http://rocksoilmech.whrsm.ac.cn/EN/10.16285/j.rsm.2020.5805 |
| _version_ | 1811302856540553216 |
|---|---|
| author | LI Jun ZHAI Wen-bao CHEN Zhao-wei LIU Gong-hui ZHOU Ying-cao |
| author_facet | LI Jun ZHAI Wen-bao CHEN Zhao-wei LIU Gong-hui ZHOU Ying-cao |
| author_sort | LI Jun |
| collection | DOAJ |
| description | In order to effectively simulate the process of random propagation of hydraulic fractures in fractured shale reservoirs, a new method of random propagation of hydraulic fractures based on the finite element mesh embedded with zero-thickness cohesive elements is proposed. This new method is based on the topological data structure of element nodes and the splitting mode of mesh nodes. The accuracy and effectiveness of the random propagation method are verified by comparing with the analytical solution of KGD model and two kinds of laboratory experiments. Meanwhile, the influences of horizontal in-situ stress difference and reservoir heterogeneity on the process of random propagation of hydraulic fractures are evaluated by running numerical examples. The results show that: (1) the new method makes up for the deficiency that the cohesive element built-in ABAQUS platform can not effectively simulate the random propagation of hydraulic fractures; (2) under a higher horizontal in-situ stress difference condition, the stronger the heterogeneity of a shale reservoir is, the easier it is to reopen a high-angle natural fracture intersecting with hydraulic fractures. The proposed method can accurately describe the random propagation behavior of complex hydraulic fractures, and thus provide a novel means for numerical simulation of naturally fractured shale reservoirs. |
| first_indexed | 2024-04-13T07:36:50Z |
| format | Article |
| id | doaj.art-554a4eea3ce1484a87ce512904ff2649 |
| institution | Directory Open Access Journal |
| issn | 1000-7598 |
| language | English |
| last_indexed | 2024-04-13T07:36:50Z |
| publishDate | 2021-01-01 |
| publisher | SCIENCE PRESS , 16 DONGHUANGCHENGGEN NORTH ST, BEIJING, PEOPLES R CHINA, 100717 |
| record_format | Article |
| series | Rock and Soil Mechanics |
| spelling | doaj.art-554a4eea3ce1484a87ce512904ff26492022-12-22T02:56:07ZengSCIENCE PRESS , 16 DONGHUANGCHENGGEN NORTH ST, BEIJING, PEOPLES R CHINA, 100717Rock and Soil Mechanics1000-75982021-01-0142126527910.16285/j.rsm.2020.5805Research on random propagation method of hydraulic fracture based on zero-thickness cohesive element LI Jun0ZHAI Wen-bao1CHEN Zhao-wei2LIU Gong-hui3ZHOU Ying-cao41. College of Petroleum, China University of Petroleum-Beijing at Karamay, Karamay, Xinjiang 834000, China 2. College of Petroleum Engineering, China University of Petroleum-Beijing, Beijing 102249, China2. College of Petroleum Engineering, China University of Petroleum-Beijing, Beijing 102249, China 3. CNPC Engineering Technology R&D Company Limited, Beijing 102206, ChinaCNPC Engineering Technology R&D Company Limited, Beijing 102206, ChinaCollege of Petroleum Engineering, China University of Petroleum-Beijing, Beijing 102249, ChinaCNPC Engineering Technology R&D Company Limited, Beijing 102206, ChinaIn order to effectively simulate the process of random propagation of hydraulic fractures in fractured shale reservoirs, a new method of random propagation of hydraulic fractures based on the finite element mesh embedded with zero-thickness cohesive elements is proposed. This new method is based on the topological data structure of element nodes and the splitting mode of mesh nodes. The accuracy and effectiveness of the random propagation method are verified by comparing with the analytical solution of KGD model and two kinds of laboratory experiments. Meanwhile, the influences of horizontal in-situ stress difference and reservoir heterogeneity on the process of random propagation of hydraulic fractures are evaluated by running numerical examples. The results show that: (1) the new method makes up for the deficiency that the cohesive element built-in ABAQUS platform can not effectively simulate the random propagation of hydraulic fractures; (2) under a higher horizontal in-situ stress difference condition, the stronger the heterogeneity of a shale reservoir is, the easier it is to reopen a high-angle natural fracture intersecting with hydraulic fractures. The proposed method can accurately describe the random propagation behavior of complex hydraulic fractures, and thus provide a novel means for numerical simulation of naturally fractured shale reservoirs.http://rocksoilmech.whrsm.ac.cn/EN/10.16285/j.rsm.2020.5805naturally fractured shale reservoirrandom propagation of hydraulic fracturezero-thickness cohesive elementreservoir heterogeneitynumerical simulation |
| spellingShingle | LI Jun ZHAI Wen-bao CHEN Zhao-wei LIU Gong-hui ZHOU Ying-cao Research on random propagation method of hydraulic fracture based on zero-thickness cohesive element Rock and Soil Mechanics naturally fractured shale reservoir random propagation of hydraulic fracture zero-thickness cohesive element reservoir heterogeneity numerical simulation |
| title | Research on random propagation method of hydraulic fracture based on zero-thickness cohesive element |
| title_full | Research on random propagation method of hydraulic fracture based on zero-thickness cohesive element |
| title_fullStr | Research on random propagation method of hydraulic fracture based on zero-thickness cohesive element |
| title_full_unstemmed | Research on random propagation method of hydraulic fracture based on zero-thickness cohesive element |
| title_short | Research on random propagation method of hydraulic fracture based on zero-thickness cohesive element |
| title_sort | research on random propagation method of hydraulic fracture based on zero thickness cohesive element |
| topic | naturally fractured shale reservoir random propagation of hydraulic fracture zero-thickness cohesive element reservoir heterogeneity numerical simulation |
| url | http://rocksoilmech.whrsm.ac.cn/EN/10.16285/j.rsm.2020.5805 |
| work_keys_str_mv | AT lijun researchonrandompropagationmethodofhydraulicfracturebasedonzerothicknesscohesiveelement AT zhaiwenbao researchonrandompropagationmethodofhydraulicfracturebasedonzerothicknesscohesiveelement AT chenzhaowei researchonrandompropagationmethodofhydraulicfracturebasedonzerothicknesscohesiveelement AT liugonghui researchonrandompropagationmethodofhydraulicfracturebasedonzerothicknesscohesiveelement AT zhouyingcao researchonrandompropagationmethodofhydraulicfracturebasedonzerothicknesscohesiveelement |