低渗透油田小井距注CO_2方案优化研究

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英文篇名：Study on Optimization of Small Well Spacing CO_2 Injection Plan in Low Permeability Oilfields 作者：马力 ; 欧阳传湘 ; 林飞 ; 宋岩 英文作者：MA Li;OUYANG Chuan-xiang;LIN Fei;SONG Yan;School of Petroleum Engineering, Yangtze University;Jilin Oilfield Carbon Dioxide Development Company; 关键词：二氧化碳驱 ; 小井距 ; 低渗透 ; 透镜体砂岩油藏 英文关键词：Carbon dioxide flooding;;Small well spacing;;Low permeability;;Lens body sandstone reservoir 中文刊名：SYHH 英文刊名：Contemporary Chemical Industry 机构：长江大学石油工程学院;吉林油田二氧化碳开发公司; 出版日期：2018-02-28 出版单位：当代化工 年：2018 期：v.47;No.265 语种：中文; 页：SYHH201802047 页数：4 CN：02 ISSN：21-1457/TQ 分类号：155-158

摘要

为解决大情字井油田水驱控制程度低,注水压力高,开采效果差以及长岭气田天然气的脱碳埋存难问题,决定大情字井油田开展小井距CO_2混相驱替试验。为研究CO_2驱油机理,提高注气开发效果,通过数值模拟技术并结合矿场试验,对开发层系划分、井网部署、注入方式、注气速度、气水段塞比以及油井流压等参数进行了优化,确定优化方案如下:确定青一段7、11、12和14小层为注气试验层;采用五点法井网,注采井距为225 m,采用气水交替的方式注入,年注气速度为0.07 HCPV,气水比为1:1,油井流压为12 MPa。经矿场实施结果表明,小井距注CO_2驱替,增油效果明显,并且试验周期短,能有效解决地层压力亏空、水驱见效慢以及砂体控制程度低等问题,并且选择物性相近,具有良好隔层的油层注气,采用气水交替的注入方式可有效抑制小井距易气窜问题,更大程度提高油田采收率。
        In order to solve the problem of low water flooding control, high water injection pressure, poor production effect and decarburization of natural gas in Changling gas field, the experiment of small well spacing CO2 mixed-phase displacement in Daqingzijing oilfield was carried out. In order to study the mechanism of CO2 flooding and improve the effect of gas injection development, the numerical simulation technology and field test were used to optimize the parameters, including development layer division, well pattern deployment, injection mode, gas injection rate, and so on. The optimized scheme was determined as follows: 1, 11, 12, and 14 small layers were set for the gas injection test layer; the five-point well pattern was used, and the well spacing was 225 m; gas and water alternate injection way was used, the annual injection rate was 0.07 HCPV, ratio of gas to water was 1: 1, oil flow pressure was 12 MPa. The implementation results showed that the stimulation effect of small well spacing CO2 flooding was obvious, and the test period was short, small well spacing CO2 flooding effectively solved the problem of formation pressure deficit, water drive slowness and low control degree of sand body. Choosing the oil layer with similar physical properties and good septum for gas injection, and using gas and water alternating injection method, effectively inhibited the small well spacing gas channeling problem, and oil recovery was increased.

引文

[1]王磊.HZ油田特低渗油藏压裂后有效开发研究与应用[J].天然气与油,2016,34(04):50-54+8-9.
    [2]李保振,张健,李相方,康晓东,张贤松.中国海上油田注气开发潜力分析[J].天然气与石油,2016,34(01):58-62+11.
    [3]史玉胜,赵宇明,张丽颖,陈跃军,胡伟.泉28断块注天然气混相驱开发效果影响因素分析[J].天然气与石油,2015,33(01):49-53+9-10.
    [4]郭沙沙,梅海燕,王怀龙,张茂林.不同注入气对裂缝性油藏原油高压物性的影响[J].天然气与石油,2014,32(06):61-64+12.
    [5]马超群,刘德华,黄磊,范虎,孟凡池.高含水期油藏开发方式选择及最优方案设计[J].天然气与石油,2012,30(03):60-63+102.
    [6]吕蓓,马庆,程宏杰.长岩心注CO2气水交替驱试验模拟研究[J].天然气与石油,2015,33(02):69-72+12.
    [7]杨胜来,陈浩,冯积累,周代余,李芳芳,章星.塔里木油田改善注气开发效果的关键问题[J].油气地质与采收率,2014,21(01):40-44+113.
    [8]王芳,罗辉,任玉飞,范维玉,梁明,张超.降低CO2驱混相压力的发展现状[J].石油化工高等学校学报,2015,28(06):93-97.
    [9]杨红,吴志伟,余华贵,江绍静,朱庆祝,奥洋洋.低渗油藏水驱后CO2潜力评价及注采方式优选[J].石油与天然气化工,2015,44(03):89-93.
    [10]杨红,余华贵,黄春霞,王伟,赵永攀,王维波.低渗油藏水驱后CO2驱潜力评价及注入参数优化[J].断块油气田,2015,22(02):240-244.