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Numerical evaluation of the shear stimulation effect in naturally fractured formations

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Abstract

In shale gas fracking, the stimulated natural fracture system is often critical to the gas production. In this paper, we present the results of state-of-the-art modeling of a detailed parametric evolution of the shear stimulation effect in discrete fracture network (DFN) formations. Two-dimensional computational modeling studies have been used in an attempt towards understanding how naturally fractured reservoirs response in hydraulic fracturing. Simulations were conducted as a function of: (1) the in-situ stress ratio; (2) internal friction angle of DFN; (3) DFN orientation with the stress field; and (4) operational variables such as injection rate. A sensitivity study reveals a number of interesting observations resulting from these parameters on the shear stimulation in natural fracture system. This work strongly links the production technology, geomechanical evaluation and aids in the understanding and optimization of hydraulic fracturing simulations in naturally fractured reservoirs.

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Authors and Affiliations

  1. Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China

    Yu Wang, Xiao Li & RunQing Zhou

  2. School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian, 116024, China

    ChunAn Tang

Authors
  1. Yu Wang
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  2. Xiao Li
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  3. RunQing Zhou
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  4. ChunAn Tang
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Correspondence to Xiao Li.

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Wang, Y., Li, X., Zhou, R. et al. Numerical evaluation of the shear stimulation effect in naturally fractured formations. Sci. China Earth Sci. 59, 371–383 (2016). https://doi.org/10.1007/s11430-015-5204-5

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  • DOI: https://doi.org/10.1007/s11430-015-5204-5

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