吉木萨尔陆相页岩水平井压裂后产量影响因素分析  

Production Sensitivity Analysis of Fractured Horizontal Wells in Jimusar Continental Shale

作　　者：孙翰文 费繁旭 高阳[2] 喻高明[1] 辛显康 Sun Hanwen;Fei Fanxu;Gao Yang;Yu Gaoming;Xin Xiankang(Yangtze University,Wuhan,Hubei 430100,China;PetroChina Xinjiang Oilfield Company,Karamay,Xinjiang 834000,China)

机构地区：[1]长江大学,湖北武汉430100 [2]中国石油新疆油田分公司,新疆克拉玛依834000

出　　处：《特种油气藏》2020年第2期108-114,共7页Special Oil & Gas Reservoirs

基　　金：国家“973”项目“典型陆相致密油藏高效开发模式研究”(2015CB250906);中石油新疆重大科技专项“准噶尔盆地二叠系致密油有效动用技术研究与应用”(2017E-0402)。

摘　　要：吉木萨尔二叠系芦草沟组陆相页岩油藏储量巨大,但开发时间短,产量影响因素不明。为明确各因素对压裂后自喷期产量的影响,结合矿区实际数据,采用一元线性回归法及灰色关联分析法,对生产井高产期30 d和1、2、3 a累计产油量展开研究。结果表明:在油井自喷生产前中期Ⅰ类钻遇率、每米加砂量、砂比、总加砂量、原油黏度等因素影响较大,钻遇油层长度、压裂液量、每米加液量、有效厚度、有效孔隙度次之,级数、含油饱和度、改造长度影响相对较小。随油井生产时间增加,自喷生产后期有效孔隙度、有效厚度等地质因素对产能影响逐渐变大。压裂后自喷期产量主控因素的确定,可有效提高水平井产量,降低开发成本,对后续开发具有指导意义。The continental shale oil reservoirs of the Permian Lucaogou Formation in Jimusar is characterized by large-scale reserve and is limited by short production time and unclear of production influencing factors. Field production data was taken to clarify the effects of various factors on the flowing production after fracturing. Unary linear regression and grey correlation analysis were used to analyze the 30-day cumulative oil production in high production stage,1-year cumulative oil production,2-year cumulative oil production and 3-year cumulative oil production. Research indicates that in the early-middle flowing production stage,the main-controlling factors include drilling ratio of Category-I reservoir,sand volume per meter,sand ratio,total sand volume and oil viscosity,followed by oil reservoir drilling length,fracturing fluid volume,fracturing fluid volume per meter,effective reservoir thickness and effective porosity,and the less influencing factors include stage-number,oil saturation and fracturing length. The influence of geological factors on production gradually increase in the late flowing production stage,which include effective porosity,net thickness,etc. The identification of main-controlling factors in the late flowing production stage after fracturing could effectively enhance horizontal well production and reduce development cost,which could provide certain guidance for subsequent development.

关 键 词：陆相页岩油 压裂 水平井 一元线性回归 灰色关联理论 芦草沟组 

分 类 号：TE348[石油与天然气工程—油气田开发工程]