期刊
ENGINEERING FRACTURE MECHANICS
卷 186, 期 -, 页码 195-207出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2017.10.013
关键词
Layered reservoir; Weak interface; Hydraulic fracture geometry; Cohesive zone method
类别
资金
- National Science and Technology Major Project of the Ministry of Science and Technology of China [2016ZX05006002]
- Key projects of Sichuan Provincial Department of Education [15ZA0045]
- National Natural Science Foundation of China [51374178]
- National outstanding youth fund [51525404]
- SWPU academic fund
Complex hydraulic fractures are often reported in layered formations as the existence of a geological discontinuity. A seepage-stress-damage coupled finite element model was built to study the hydraulic fracture propagation behavior of the X5 sandstone and shale layered reservoir in the western Sichuan basin. The cohesive zone method (CZM) based on damage mechanics was used to simulate hydraulic fracture initiation and propagation. The influence of geologic parameters and fracturing execution parameters on hydraulic fracture morphology were studied. The results show that hydraulic fractures are mainly penetrating the interface and extending along the interface to generate a branched fracture, while others are forming normal bi-wing fractures. (C) 2017 Elsevier Ltd. All rights reserved.
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