Journal of Changjiang River Scientific Research Institute ›› 2016, Vol. 33 ›› Issue (7): 63-67.DOI: 10.11988/ckyyb.20150234

• ROCK-SOIL ENGINEERING • Previous Articles     Next Articles

Simulation of Multi-hole Hydraulic Fracturing Using FDEM-flow Method

YAN Cheng-zeng1,2, ZHENG Hong3,4   

  1. 1.Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing 100124, China;
    2.College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China;
    3.Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China;
    4.State Key Laboratory of Geomechanics and Geotechnical Engineering, Chinese Academy of Sciences, Wuhan 430071, China
  • Received:2005-03-31 Published:2016-07-01 Online:2016-07-01

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Abstract: In order to instruct construction of hydraulic fracturing, with the proposed FDEM-flow method, we studied multi-hole hydraulic fracturing. When the pressure of hole H2 is small, crack starting from hole H1 hardly deflects toward hole H2; when water pressure of H2 is large, crack starting from H1 propagates to H2 obviously; while when pressures of H1 and H3 increase synchronously, crack extended downward from hole H1 deflects towards hole H3, and crack starting from hole H3 develops towards hole H1, and finally, two opposing propagation cracks form between H1 and H3. Results show that, direction of hydraulic fracturing cracks will be interfered by adjacent holes, hence the direction can be controlled through adjusting the pressure of adjacent holes; while the initiation water pressure that crack begins to occur can be reduced through the adjacent interference, which validated the rationality of synchronous hydraulic fracturing technology.

Key words: FEMDEM, FDEM-flow, multi-hole hydraulic fracturing, synchronous fracturing, fracture, stress interference

CLC Number: 

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