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射孔水平井分段压裂起裂压力理论研究
引用本文:吕志凯,何顺利,罗富平,陆红军,王文雄.射孔水平井分段压裂起裂压力理论研究[J].石油钻探技术,2011,39(4):72-76.
作者姓名:吕志凯  何顺利  罗富平  陆红军  王文雄
作者单位:石油工程教育部重点实验室(中国石油大学(北京)),北京 102249;2.中国中化石油勘探开发有限公司,北京 100031;3.中国石油长庆油田分公司超低渗透研究中心,陕西西安 710061;4.中国石油长庆油田分公司油气工艺研究院,陕西西安 710061
摘    要:综合考虑井筒内压、原始地应力分布、先压水力裂缝的诱导应力等因素,根据叠加原理及弹性力学理论,建立了射孔水平井分段压裂起裂压力计算模型,分析了初始及后续裂缝的起裂规律。研究结果表明,初始裂缝产生的诱导应力分布受裂缝间距影响。当初始裂缝缝长一定时,沿井筒方向诱导应力逐步降低,直至地应力场趋于原始地应力场;射孔水平井裂缝起裂受射孔方位角的影响,最佳射孔方位由井筒周围地应力分布决定;先压裂缝产生的诱导应力场会导致后续裂缝的起裂压力增大,这种影响会随着裂缝半缝长的增大而增强;半缝长一定时,起裂压力的增加幅度随着裂缝间距的增加递减。 

关 键 词:射孔完井  水平井  分段压裂  应力场  诱导应力  起裂压力
收稿时间:2018-11-09

Study on Hydraulic Fracture Initiation Pressure of Staged Fracturing in Perforated Horizontal Wells
Lii Zhikai,He Shunli,Luo Fuping,Lu Hongjun,Wang Wenxiong.Study on Hydraulic Fracture Initiation Pressure of Staged Fracturing in Perforated Horizontal Wells[J].Petroleum Drilling Techniques,2011,39(4):72-76.
Authors:Lii Zhikai  He Shunli  Luo Fuping  Lu Hongjun  Wang Wenxiong
Affiliation:1.MOE Key Laboratory of Petroleum Engineering,China University of Petroleum(Beijing),Beijing, 102249,China;2.Petroleum Exploration & Production Company,Sinochem,Beijing,100031,China;3.Research Center of Super-low Permeability Reservoir;Changqing Oilfield Branch,Xi’ an,Shaanxi,710061,China; 4.Oil & Gas Technology Research Institute,Changqing Oilfield Branch,Xi’an,Shaanxi,710061,China)
Abstract:Based on the superposition and elasticity theory,a theoretical model of initiation pressure calculation in staged fracturing of perforated horizontal well was developed while considering the effect of wellbore pressure,formation stress distribution,and stress induced by hydraulic fracture.The change of initial and subsequent fractures initiation was studied.The results show that the stress induced by initial fracture is influenced by fracture spacing.When the initial fracture length is constant,the induced ...
Keywords:perforated completion  horizontal well  staged fracturing  stress field  induced stress  initiation pressure  
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