A 2D FDEM-FLOW METHOD FOR SIMULATING HYDRAULIC FRACTURING
YAN Chengzeng，ZHENG Hong，SUN Guanhua，GE Xiurun
(State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China)
Abstract：Hydraulic fracturing is a commonly-used technique in unconventional gas rupture(such as shale gas) exploration. A theoretical framework，called FDEM-flow method，for analyzing flow-structure interaction was proposed based on FEM/DEM. Combined with the recursive algorithm of searching the fracture network formed，a complete solution was developed to simulate the hydraulic fracturing of rock under the coupled action of fluid and solid in two-dimensional condition. The results from the proposed method agree well with the analytical solutions in two seepage cases，which verifies the correctness of the proposed method. An example of hydraulic fracturing was analyzed. The results demonstrate that the proposed method has a good potential in simulating hydraulic fracturing and that the method might provide a new way to simulate the hydraulic fracturing in the exploitation of shale gas.
张玉军. 尤卡山坑道规模试验热-气-应力耦合过程的离散元模拟[J]. 岩石力学与工程学报，2007，26(增2)：3 874-3 881.(ZHANG Yujun. Coupled thermo-gas-mechanical simulation for Yucca mountain drift scale test by discrete element method[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(Supp.2)：3 874-3 881.(in Chinese))
<body>Your browse does not support frame!</body> " target="_blank">
[5]
王伯军，张 霞，马德胜，等. 稠油出砂冷采颗粒离散元数学模型[J]. 石油勘探与开发，2011，38(4)：469-473.(WANG Bojun，ZHANG Xia，MA Desheng，et al. Discrete element method mathematical model of sand-carrying cold heavy oil production[J]. Petroleum Exploration and Development，2011，38(4)：469-473.(in Chinese))
[10]
刘晓丽，林 鹏，韩国峰，等. 裂隙岩质边坡渗流与非连续变形耦合过程分析[J]. 岩石力学与工程学报，2013，32(6)：1 248-1 256. (LIU Xiaoli，LIN Peng，HAN Guofeng，et al. Hydro-mechanical coupling process on rock slope stability based on discontinuous deformation analysis and discrete fracture network models[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(6)：1 248- 1 256.(in Chinese))
<body>Your browse does not support frame!</body> " target="_blank">
[14]
严成增，郑 宏，孙冠华，等. 基于OpenMP的二维FEM/DEM并行分析方法[J]. 岩土力学，2014：35(9)：2 717-2 724.(YAN Chengzeng，ZHENG Hong，SUN Guanhua，et al. The two-dimensional FEM/DEM parallel analysis method based on OpenMP[J]. Rock and Soil Mechanics，2014，35(9)：2 717-2 724.(in Chinese))
<body>Your browse does not support frame!</body> " target="_blank">
[18]
严成增，孙冠华，郑 宏，等. 二维FEM/DEM爆炸气体驱动下的岩体破裂[J]. 岩土力学，2015(待刊).(YAN Chengzeng，SUN Guanhua，ZHENG Hong，et al. The two-dimensional FEM/DEM parallel analysis method based on openmp[J]. Rock and Soil Mechanics，2015(to be pressed).(in Chinese))
<body>Your browse does not support frame!</body> " target="_blank">
[1]
张玉军，徐 刚. 核废料地质处置概念库锚喷支护坑道热-水-应力耦合效应的二维离散元分析[J]. 岩土力学，2013，34(增1)：430-436.(ZHANG Yujun，XU Gang. 2D distinct element analyses of thermo-hydro-mechanical coupling effects for a drift with bolt- shotcrete supporting in a conceptual nuclear waste repository[J]. Rock and Soil Mechanics，2013，34(Supp.1)：430-436.(in Chinese))
<body>Your browse does not support frame!</body> " target="_blank">
严成增，孙冠华，郑 宏，等. 基于局部单元劈裂的FEM/DEM自适应分析方法[J]. 岩土力学，2014：35(7)：2 064-2 070.(YAN Chengzeng，SUN Guanhua，ZHENG Hong，et al. Adaptive FEM/DEM analysis method based on the local splitting elements[J]. Rock and Soil Mechanics，2014：35(7)：2 064-2 070.(in Chinese))
<body>Your browse does not support frame!</body> " target="_blank">
王 媛. 单裂隙面渗流与应力的耦合特性[J]. 岩石力学与工程学报，2002，21(1)：83-87.(WANG Yuan. Coupling characteristic of stress and fluid flow within a single fracture[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(1)：83-87.(in Chinese))
[7]
刘泉声，吴月秀，刘 滨. 应力对裂隙岩体等效渗透系数影响的离散元分析[J]. 岩石力学与工程学报，2011，30(1)：176-183.(LIU Quansheng，WU Yuexiu，LIU Bin. Discrete element analysis about effect of stress on equivalent permeability of fractured rockmass[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(1)：176-183.(in Chinese))
[8]
张奇华，邬爱清. 三维任意裂隙网络渗流模型及其解法[J]. 岩石力学与工程学报，2010，29(4)：720-730.(ZHANG Qihua，WU Aiqing. Three-dimensional arbitrary fracture network seepage model and its solution method[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(4)：720-730.(in Chinese))
[11]
JIAO Y Y，ZHANG H Q，ZHANG X L，et al. A two-dimensional coupled hydromechanical discontinuum model for simulating rock hydraulic fracturing[J]. International Journal for Numerical and Analytical Method in Geomechanics，DOI：10.1002/nag.2314.
<body>Your browse does not support frame!</body> " target="_blank">
MUNJIZA A，ANDREWS K R F. Penalty function method for combined finite-discrete element systems comprising large number of separate bodies[J]. International Journal for Numerical Methods in Engineering，2000，49(11)：1 369-1 377.
<body>Your browse does not support frame!</body> " target="_blank">
2015, Vol. 34 
