焦天宇
JIAO Tianyu

• 1:中国石油大庆油田有限责任公司提高采收率项目部

摘要(Abstract)：

针对大庆油田一类油层聚驱后剩余油储量大、原井网聚驱后提高采收率幅度低的难题，以长垣油田北部为切入点，深入研究了一类油层聚驱后化学驱变流线方式的井网优化方式。在深刻剖析原井网原流线化学驱效果差原因的基础上，利用流线含油饱和度数学模型优化设计流线转变方式，应用物理模拟实验方法及现场试验进行效果验证。结果表明：聚驱后原井网原流线二次化学驱效果差的原因主要是主流线部位含油饱和度相对较低，理论上确定最佳布井方式应在原井网滞留区处，即原井网原流线旋转一次45°处加密或重构布井，室内物理模拟及现场试验表明流线转变后滞留区处剩余油得到了有效动用，提高采收率幅度为8.3百分点。为此，大庆长垣北部一类油层聚驱后化学驱井网优化应重点考虑原井网原流线旋转一次45°加密或重构布井的流线转变方式。
In view of problems of large remaining oil reserves and low incremental recovery after polymer flooding in original well patterns in Daqing Oilfield,well pattern optimization of streamline variation mode for Class Ⅰ reservoirs after polymer flooding is studied through taking the north of Placanticline oilfield as starting point. Based on analysis of the cause of original streamline poor effect of chemical flooding in original well pattern,the streamline transformation mode is optimized by using streamline oil saturation mathematical model,and the effect is verified by physical simulation experiment and field test. The results show that the poor effect of secondary chemical flooding of original streamline in original well pattern after polymer flooding is mainly due to relatively low oil saturation at the main streamline. Theoretically,it is determined that the best well displacement should be infilling or reconstructing in the retention area of original well pattern,i.e. the original streamline of original well pattern rotates 45° once. Lab physical simulation and field test show that the remaining oil in retention area is effectively produced after streamline transformation,and recovery is increased by 8.3 percentage points. Therefore original streamline of original well pattern rotating 45° once is recommended for well pattern optimization after polymer flooding in Class Ⅰ reservoirs in north Daqing Placanticline.

关键词(KeyWords)： 大庆长垣北部;聚驱后化学驱;变流线;原井网旋转45°
north Daqing Placanticline;chemical flooding after polymer flooding;streamline variation;original pattern rotating 45°

Abstract:

Keywords:

基金项目(Foundation): 中国石油天然气股份有限公司重大科技专项“化学驱后提高采收率技术研究与试验”（2016E-0207）

作者(Author): 焦天宇
JIAO Tianyu

DOI: 10.19597/j.issn.1000-3754.202112009

参考文献(References)：

• [1]王德民，程杰成，吴军政，等.聚合物驱油技术在大庆油田的应用[J].石油学报，2005,26(1):74-78.WANG Demin,CHENG Jiecheng,WU Junzheng,et al.Application of polymer flooding technology in Daqing Oilfield[J].Acta petrolei sinaca,2005,26(1):74-78.
• [2]王启民，冀宝发，隋军，等.大庆油田三次采油技术的实践与认识[J].大庆石油地质与开发，2001,20(2):1-8.WANG Qimin,JI Baofa,SUI Jun,et al.Practice and knowledge of tertiary recovery technique in Daqing Oilfield[J].Petroleum Geology&Oilfield Development in Daqing,2001,20(2):1-8.
• [3]杨文武.B区块主力油层聚驱后变流线井网调整研究[J].石油化工高等学校学报，2021,34(2):54-59.YANG Wenwu.Research of well pattern adjustment by streamline variation on main productive layers in post-polymer flooding block B[J].Journal of Petrochemical Universities,2021,34(2):54-59.
• [4]吕远.孤东油田二区Ng5聚驱后井网调整对策研究[J].内蒙古石油化工，2019,29(3):105-107.LüYuan.Study on adjustment and countermeasure of well network after polymer flooding in second area Ng5 in Gudong Oilfield[J]. Inner Mongolia Petrochemical Industry, 2019, 29(3):105-107.
• [5]李丽娟.大庆油田一类油层聚驱后聚表剂驱油技术[J].大庆石油地质与开发，2013,32(3):118-122.LI Lijuan.Oil displacing technique by polymer and surfactant after polymer flooding for type-1 oil reservoir in Daqing Oilfield[J].Petroleum Geology&Oilfield Development in Daqing,2013,32(3):118-122.
• [6]刘曼玉.一类油层聚驱后弱碱三元复合驱提高采收率[J].化学工程与装备，2021,50(10):28-30.LIU Manyu. Weak base ASP flooding after polymer flooding improves oil recovery[J]. Chemical Engineering&Equipment,2021,50(10):28-30.
• [7]苍榕.聚驱后小井距高浓度聚驱油层动用状况分析[J].化学工程与装备，2019,48(2):183-185.CANG Rong. Analysis of production status of high concentration polymer flooding reservoir with small well spacing after polymer flooding[J]. Chemical Engineering&Equipment, 2019, 48(2):183-185.
• [8]魏勋.S区块一类油层聚驱后强碱区块深度调剖技术研究与应用[J].化学工程与装备，2019,48(6):98-99.WEI Xun.Research and application of deep profile control technology for a class of oil reservoir in S block after polymer flooding in strong alkali block[J]. Chemical Engineering&Equipment,2019,48(6):98-99.
• [9]白振强，吴胜和，付志国.大庆油田聚合物驱后微观剩余油分布规律[J].石油学报，2013,34(5):924-931.BAI Zhenqiang,WU Shenghe,FU Zhiguo.The distribution of microscopic remaining oils after polymer flooding in Daqing Oilfield[J].Acta Petrolei Sinica,2013,34(5):924-931.
• [10]孙建英，方艳君.聚驱后剩余油分布及挖潜技术研究[J].大庆石油地质与开发，2005,24(4):37-39.SUN Jianying, FANG Yanjun. Remaining oil distribution and techniques for further development after polymer flooding[J].Petroleum Geology&Development in Daqing,2005,24(4):37-39.
• [11]侯健，杜庆军，束青林，等.聚合物驱宏观剩余油受效机制及分布规律[J].石油学报，2010,31(1):96-99.HOU Jian, DU Qingjun, SHU Qinglin, et al. Macroscopic response mechanism and distribution rules of remaining oil in polymer flooding[J].Acta Petrolei Sinica,2010,31(1):96-99.
• [12]闫坤，韩培慧，曹瑞波，等.聚驱后优势渗流通道流线数值模拟识别方法的建立及应用[J].油气藏评价与开发，2019,21(2):33-37.YAN Kun,HAN Peihui,CAO Ruibo,et al.Establishment and application of numerical simulation identification method for dominant seepage channels after polymer flooding[J].Reservoir Evaluation and Development,2019,21(2):33-37.
• [13]禹影.聚合物驱后油层优势渗流通道识别与治理[J].大庆石油地质与开发，2017,36(4):101-105.YU Ying. Identification and control of the preferential seepage channels for the oil reservoirs after the polymer flooding[J].Petroleum Geology&Oilfield Development in Daqing,2017,36(4):101-105.
• [14]汪萍，常毓文，唐玮，等.聚合物驱油后提高采收率优化研究[J].特种油气藏，2011,18(4):73-76.WANG Ping,CHANG Yuwen,TANG Wei,et al.EOR optimization after polymer flooding[J]. Special Oil&Gas Reservoir,2011,18(4):73-76.
• [15]孟令伟，康万利，王志伟，等.聚驱后等流度提高采收率室内驱油实验研究[J].中国科技论文，2009,4(6):436-440.MENG Lingwei, KANG Wanli, WANG Zhiwei, et al. Experimental research in laboratory on equi-mobility improving oil recovery after polymer flooding[J].Sciencepaper Online, 2009, 4(6):436-440.
• [16]张伟.基于流线模拟法的示踪剂解释方法研究与应用[D].青岛：中国石油大学（华东），2018.ZHANG Wei.Study and application of tracer testing interpretation based on streamline simulation method[D]. Qingdao:China University of Petroleum(East China),2018.
• [17]刘海波.大庆油区长垣油田聚合物驱后优势渗流通道分布及渗流特征[J].油气地质与采收率，2014,21(5):69-72.LIU Haibo. Dominant flowing channels distribution and seepage characteristics after polymer flooding in Daqing Oilfield[J].Petroleum Geology and Recovery Efficiency, 2014, 21(5):69-72.
• [18]孟凡顺，孙铁军，朱炎，等.利用常规测井资料识别砂岩储层大孔道方法研究[J].中国海洋大学学报（自然科学版），2007,49(3):463-468.MENG Fanshun,SUN Tiejun,ZHU Yan,et al.A study on the method to identify large pore paths using conventional well logging data in sandstone reservoirs[J].Periodical of Ocean University of China(Natural Science Edition),2007,49(3):463-468.
• [19]何胡军，王秋语，程会明，等.孤岛中一区聚合物驱后储层参数变化规律[J].石油与天然气地质，2010, 31(2):255-259.HE Hujun,WANG Qiuyu,CHENG Huiming,et al. A study on reservoir parameter changes after polymer injection in Block 1 of the central Gudao[J]. Oil&Gas Geology, 2010, 31(2):255-259.
• [20]陈文林.大庆油田四次采油凝胶颗粒+聚合物驱技术研究[J].特种油气藏，2020,27(5):106-112.CHEN Wenlin. Research on gel particles+polymer flooding technology for quaternary oil recover in Daqing Oilfield[J].Special Oil&Gas Reservoirs,2020,27(5):106-112.
• [21]刘海成.孤岛油田层系井网互换油井致效机制及见效模式[J].油气地质与采收率，2021,28(5):109-115.LIU Haicheng.Study on response mechanism and mode of oil well after layer and well pattern interchange in Gudao Oilfield[J].Petroleum Geology and Recovery Efficiency,2021,28(5):109-115.