Impact of Induced Stress on Fracture Initiation of Horizontal Wells with Perforation
Based on the superposition theorem and elasticity theory,a numerical model for calculating initiation pressure of staged fracturing perforated horizontal well is abstractly presented in this paper.Results indicate that the stress induced by initial fracture is influenced by fracture spacing,and when the initial fracture length is constant,the induced stress along wellbore axis direction decreases gradually until the combined stress field tends to the in-situ stress field.The optimum perforation orientation is in stress condition of this paper is 0°.Induced stress can increase subsequent fractures initiation pressure,and increase with the fracture length.When fracture length is constant,the increase level of initiation pressure decreases rapidly with the increase of fracture spacing.Results from the analytical and numerical models used in this study are interpreted with a particular effort to enlighten the causes of abnormally high treating pressures during hydraulic fracture treatments,as well as engineers study recovery techniques.
perforation horizontal well staged fracturing stress field induced stress initiation pressure
Guangfeng LIU Zhikai LV Shunli HE Wen ZHAO Hongjun LU
Key Laboratory for Petroleum Engineering of the Ministry of Education,China University of Petroleum, Petrochina Changqing Oilfield Company Xi”an,China
国内会议
北京
英文
269-274
2011-10-20（万方平台首次上网日期，不代表论文的发表时间）