Volume 26 Issue 1
Feb.  2020
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WANG Hui, LIU Quansheng, 2020. Investigation on fracture propagation in fractured-cavity reservoirs based on FEMM-fracflow modelling. Journal of Geomechanics, 26 (1): 55-64. DOI: 10.12090/j.issn.1006-6616.2020.26.01.006
Citation: WANG Hui, LIU Quansheng, 2020. Investigation on fracture propagation in fractured-cavity reservoirs based on FEMM-fracflow modelling. Journal of Geomechanics, 26 (1): 55-64. DOI: 10.12090/j.issn.1006-6616.2020.26.01.006

Investigation on fracture propagation in fractured-cavity reservoirs based on FEMM-fracflow modelling

doi: 10.12090/j.issn.1006-6616.2020.26.01.006
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  • Received: 2019-01-11
  • Revised: 2019-06-16
  • Published: 2020-02-28
  • The propagation path of hydraulic fractures is critical to oil recovery in fractured-cavity reservoirs. Based on Hybrid Finite-element and Mesh-free Method-Fracflow (FEMM-Fracflow) numerical simulation platform, this paper explores the influence of natural caves, in-situ stress and injection velocity on the propagation path of hydraulic fractures in reservoirs. The simulation results show that when there are caves, the fracture propagates toward the cave. When the horizontal confining pressure is changed, the fracture propagates toward the cave obviously without applying horizontal confining pressure, and eventually connects with the cave; when the horizontal confining pressure of 50 MPa is applied, the trend of hydraulic fracture propagating toward the cave is obviously weakened; when injection velocity is changed, the fracture propagates toward the cave with the injection velocity of 0.05 kg/s, while the tendency of fracture propagating toward the cave is weakened with the injection velocity of 0.2 kg/s.

     

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