高含水复杂断块油田加密井井位智能优选方法及其应用

发布时间：2018-12-30 11:01

【摘要】：高含水复杂断块油田地下剩余油高度分散、多层叠置、犬牙交错,对老油田二次开发新钻高效加密井的井位优选提出了苛刻的要求。通过研究复杂断块油藏剩余油分布特点,分析了井位优选的主要影响因素。利用复杂断块油田三维地质模型和油藏数值模拟后的多种三维场数据,以剩余可动油量为目标函数,以油井控制半径、经济极限井距和经济极限剩余可动油量为约束条件,建立了剩余可动油量计算模型,并给出了复杂断块油田单井控制范围和主要参数的计算方法,实现了直井、斜井井位的单因素智能优选。采用模糊综合评判方法综合考虑影响井位优化的多种因素,建立了多因素井位优选方法。通过编制相应的计算机软件,实现了复杂断块油田加密井井位智能优选的精细化和定量化。该方法应用于大港港西油田二区二次开发工程中,优选出的井位符合油藏动、静态认识,钻井实施后取得了良好的开发效果,为高含水复杂断块油田持续效益开发提供了技术支撑。
[Abstract]:The underground remaining oil in high water-cut complex fault block oilfield is highly dispersed, multi-layer superimposed and interlaced, which puts forward harsh requirements for the selection of high efficiency infill wells in the secondary development of old oil fields. By studying the distribution characteristics of remaining oil in complex fault block reservoir, the main influencing factors of well location optimization are analyzed. Using 3D geological model of complex fault block oilfield and various 3D field data after reservoir numerical simulation, taking residual movable oil quantity as objective function, taking well control radius, economic limit well spacing and economic limit remaining movable oil quantity as constraint conditions. The calculation model of residual movable oil quantity is established, and the calculation method of control range and main parameters of single well in complex fault block oilfield is given. The single factor intelligent selection of vertical well and inclined well location is realized. The fuzzy comprehensive evaluation method is used to synthetically consider many factors affecting well location optimization, and a multi-factor well location optimization method is established. By compiling the corresponding computer software, the intelligent selection of infill well location in complex fault block oil field is realized in detail and quantificationally. This method has been applied to the secondary development project in the second area of Dagang Gang West Oilfield. The selected well location accords with the dynamic and static understanding of the reservoir, and good development effect has been obtained after the drilling implementation. It provides technical support for sustainable benefit development of complex fault block oilfield with high water cut.
【作者单位】：中国石油勘探开发研究院;中石油煤层气有限责任公司;中国石油天然气集团公司尼罗河公司;中国石油大港油田公司勘探开发研究院;中国石油大学石油工程学院;
【基金】：国家重大科技专项(2016ZX05010-002) 中国石油天然气股份有限公司科技专项(2016B-1202)资助
【分类号】：TE347

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