点击次数：

论文类型：期刊论文

发表时间：2016-02-01

发表刊物：SCIENCE CHINA-EARTH SCIENCES

收录刊物：SCIE、EI

卷号：59

期号：2

页面范围：371-383

ISSN号：1674-7313

关键字：Hydraulic fracturing; DFN; Numerical simulation; Shear stimulation effect

摘要：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.