Journal
ENGINEERING FRACTURE MECHANICS
Volume 189, Issue -, Pages 232-245Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2017.11.020
Keywords
Hydraulic fracture; Analytical method; Natural fracture; Energy
Categories
Funding
- National Natural Science Foundation of China [11572249, 11772257]
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Hydraulic fracturing is a widely applied stimulation method to enhance the productivity of unconventional resources. The hydraulic fracturing operation in naturally fractured reservoirs is complex, and the fractures can intersect a natural interface such as a bedding plane. The hydraulic fracture may either cross or be arrested by slippage without dilation, and the fracture plane can be opened upon arriving the interface. In the current study, a theoretical approach to predict the fracture extension encountering a natural fracture under far field stresses is developed, based on the Griffith stability criterion. The critical fluid pressure required to cross the interface, open the natural fracture, or make slippage take place is obtained. New criteria to separate opening zone, arrest and crossing zone are proposed based on stress field difference. The theoretical predictions are compared with experimental data and show reasonable accuracy. (C) 2017 Elsevier Ltd. All rights reserved.
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