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.
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2015, Vol. 34 
