螺旋射孔参数对地层破裂压力的影响  

Effect of Spiral Perforation Parameters on Formation Fracture Pressure

作　　者：薛世峰[1] 孙春海 于海彬[3] 孙峰[1] 

机构地区：[1]中国石油大学(华东)储运与建筑工程学院,山东青岛266580 [2]中石化宁波工程有限公司,浙江宁波315103 [3]胜利油田分公司胜利采油厂,山东东营257061

出　　处：《油气井测试》2015年第6期11-13,73,共3页Well Testing

基　　金：国家科技重大专项"动态负压与优化射孔技术(2011ZX02006-002);国家自然科学基金"稠油热采中THM耦合机制及储层破裂演化研究(51304230)共同资助

摘　　要：水力压裂中一般都会进行射孔作业,而螺旋射孔是目前油气开采中常用的一种射孔工艺。建立"套管-水泥环-地层"的三维分层有限元数值模型,结合某油田的实际地应力情况及射孔数据运用单一变量理论,分析了螺旋射孔各参数对地层破裂压力的影响:1射孔密度和射孔方位角对其影响较大。地层破裂压力随射孔密度的增加而降低,而随射孔方位角的增加而增加。射孔时,尽量选取高孔密、低方位角射孔。2射孔深度和射孔孔径对地层破裂压力影响不大。地层破裂压力随前者的增加而降低,随后者的增加而增加。3射孔相位角对地层破裂压力的影响呈波动状,应尽量选取45°相位射孔。In hydraulic fracturing,perforating operation is generally applied and spiral perforation is a commonly used in developing for oil and gas wells. The three-dimensional layered finite element numerical model of ' casing,cement ring and formation has been built,a single variable theory is used by combing with the actual earth stress situation of the certain oilfield and perforation data to analyze the influence of various parameters of the spiral perforation on the formation fracture pressure. That are 1 the influence of perforation density and perforation azimuth is bigger. Formation fracture pressure decreases with increasing perforation density,increases with the increase of the perforation azimuth. High-density,low azimuth perforation is selected as far as possible. 2The effect of perforating depth and the perforation aperture on formation fracture pressure is not bigger. Formation fracture pressure decreases with the increase of the former,and then increases with that of latter. 3The influence of perforation phase angle on the formation fracture pressure is undulating,45 degrees phase of perforating should be chosen.

关 键 词：螺旋射孔 破裂压力 数值模拟 射孔参数 影响因素 

分 类 号：TE257[石油与天然气工程—油气井工程]