现代地质2012，Vol.26Issue(3)：527-532,6.
沁水盆地南部煤储层水力压裂裂缝发育特征的数值模拟研究
Numerical Simulation Research on Propagation of Hydraulic Fractures of Coal Reservoir in South Qinshui Basin
摘要
Abstract
Taking the south Qinshui basin as researching area and the 3# coal bed as the researching target, a geological model of this area was set up on the base of the characteristics of the field stress and the triaxial stress test results of coal samples from Sihe coal mine in Jincheng. Using finite element software ANSYS as the platform, this research simulated the changing law that the geological factors including ground stress and Young's modulus of coal reservoirs influence on the initiation pressure and propagation of the fracture. The results show that the initiation pressure keeps constant when the maximum horizontal principal stress changes, but increases with the minimum horizontal principal stress increasing, and the variation range is between 10 MPa and 25 MPa. The maximum fracture length and the maximum fracture width keep unchanged with the increasing of the maximum horizontal principal stress, but decrease with the rising of the minimum horizontal principal stress and Young's modulus. The maximum fracture length has the highest probability to range between 36 m and 83 m. The results coincide well with the field data. This achievement would provide a reference for hydrofracturing design of coalbed methane well in south Qinshui basin.关键词
水力压裂/数值模拟/弹性模量/地应力场/沁水盆地南部Key words
hydraulic fracturing/ numerical simulation/ Young's modulus/ ground stress/ south Qinshui basin分类
天文与地球科学引用本文复制引用
王晓锋,唐书恒,解慧,李忠城,黄家会..沁水盆地南部煤储层水力压裂裂缝发育特征的数值模拟研究[J].现代地质,2012,26(3):527-532,6.基金项目
国家"973"计划项目(2009CB219604) （2009CB219604）
国家自然科学基金项目(40972108) （40972108）
国家科技重大专项项目(2011ZX05034003). （2011ZX05034003）
