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simulation of hydraulic fracture propagation in fractured coal seams with continuum-discontinuum elements
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نویسنده
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zhou haifeng ,gao hui ,feng chun ,sun zizheng
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منبع
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journal of applied and computational mechanics - 2021 - دوره : 7 - شماره : 4 - صفحه:2185 -2195
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چکیده
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Creating new fracture networks in coal seams with natural fractures through hydraulic fracturing techniques is an effective method for exploiting coalbed methane. in this paper, a continuumdiscontinuum element method (cdem) is developed for simulating and assessing hydraulic fracture propagation in coal seams. an elastic-damage-fracture model is proposed for capturing the deformation and cracking processes of fractured coal. a stress-fracture percolation relation is implemented to simulate the hydro-mechanical coupling processes. the influence of x-direction angles, mechanical strengths, distances and lengths of natural fractures are analyzed in detail. the results are potentially useful to optimize the fracturing design.
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کلیدواژه
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continuum-discontinuum element method (cdem) ,hydraulic fracturing ,fractured coal ,hydro-mechanical coupling
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آدرس
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xian university of science and technology, college of energy engineering, china. shenhua shendong coal group corporation ltd, daliuta town shenmu county, china, hebei university of technology, school of civil and transportation engineering, china, chinese academy of sciences, institute of mechanics, china, shandong university, school of qilu transportation, china. shandong university, shenzhen research institute, china
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پست الکترونیکی
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zizheng.sun@sdu.edu.cn
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Authors
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