高含水期油田的注采关系调整和挖潜开采研究
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摘要
目前,关于高含水油田矢量注采的文献大多以定性或策略性结论为主,缺乏定量研究,在实际应用中有一定的局限性。通过引用等饱和度前缘界面来定义体积波及系数,利用数值模拟技术,建立了一套体积波及系数的评价方法。基于该方法进行了反九点井网转五点井网条件下的矢量注采波及系数评价,并绘制相应图版,以指导井组矢量注采优化。研究表明,对于平面均质储层,水平井变井网后"强注强采"模式开发效果更佳:新加密水平采油井高液量生产,最佳液量600 m3/d;边角井转注后维持高注采比,最优注采比为角井1.2~1.4,边井1.0~1.2;原水井降低注采比,最优注采比0.5~0.75。Q油田先导试验井组表明,矢量注采优化调整能够改善水驱波及,控水稳油,提高水驱采收率,对于经历类似井网调整的海上油田具有很好的推广应用价值。
At present,the document about vector injection-production in high Water cut Oilfield mostly provides a qualitative or strategic conclusion,which lacks quantitative research and has certain limitations in practical application. In this paper,an evaluation method of volumetric sweep efficiency is established by using numerical simulation technique after isosaturation front surface is introduced to define volumetric sweep efficiency. Based on the method,a vector injection-production sweep efficiency evaluation is conducted and relation charts between volumetric sweep efficiency and injection-production ratio are mapped out which offer a guide to injection and production. Research shows,for homogeneous reservoir,intensive injection and production provides a better development effect. The infilling horizontal well should produce on a high liquid level( 600 m3/d),the original water well should inject at a low injectionproduction ratio( 0. 5 ~ 0. 75) and the new inverted water well should inject at a high injection-production ratio( corner well 1. 2 ~ 1. 4,edge well 1. 0 ~ 1. 2). The results of pilot well group in Oilfield Q indicate thatvector injection-production could improve water flooding sweep efficiency and enhance the oil recovery,which has a great value of application and dissemination for those similar offshore oilfields after well pattern adjustment.
At present,the document about vector injection-production in high Water cut Oilfield mostly provides a qualitative or strategic conclusion,which lacks quantitative research and has certain limitations in practical application. In this paper,an evaluation method of volumetric sweep efficiency is established by using numerical simulation technique after isosaturation front surface is introduced to define volumetric sweep efficiency. Based on the method,a vector injection-production sweep efficiency evaluation is conducted and relation charts between volumetric sweep efficiency and injection-production ratio are mapped out which offer a guide to injection and production. Research shows,for homogeneous reservoir,intensive injection and production provides a better development effect. The infilling horizontal well should produce on a high liquid level( 600 m3/d),the original water well should inject at a low injectionproduction ratio( 0. 5 ~ 0. 75) and the new inverted water well should inject at a high injection-production ratio( corner well 1. 2 ~ 1. 4,edge well 1. 0 ~ 1. 2). The results of pilot well group in Oilfield Q indicate thatvector injection-production could improve water flooding sweep efficiency and enhance the oil recovery,which has a great value of application and dissemination for those similar offshore oilfields after well pattern adjustment.
引文
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[14]刘超,廖新武,李廷礼,等.海上特低幅构造稠油底水油藏水平井开发策略[J].特种油气藏,2013,20(4):81-84.Liu Chao,Liao Xinwu,Li Tingli,et al.Horizontal Well Strategy for Offshore Heavy Oil Reservoir with Bottom Water in Ultra-Low Relief Structure[J].Special Oil&Gas Reservoirs,2013,20(4):81-84.
[15]马超群,刘德华,黄磊,等.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(3):60-63.Ma Chaoqun,Liu Dehua,Huang Lei,et al.Selection of High Watery Period Oil Reservoir Development Options and Optimal Option Design[J].Natural Gas and Oil,2012,30(3):60-63.
[16]程林松.渗流力学[M].北京:石油工业出版社,2011:93-100.Cheng Linsong.Fluid Mechanics in Porous Medium[M].Beijing:Petroleum Industry Press,2011:93-100.
[17]武兵厂,姚军,吕爱民.水平井与垂直井联合井网波及系数研究[J].石油学报,2006,27(4):85-88.Wu Bingchang,Yao Jun,Lv Aimin.Research on Sweep Efficiency in Horizontal-Vertical Combined Well Pattern[J].Acta Petrolei Sinica,2006,27(4):85-88.
[18]姜汉桥,姚军.油藏工程原理与方法[M].东营:中国石油大学出版社,2006:40-46.Jiang Hanqiao,Yao Jun.Theory and Method of Reservoir Engineering[M].Dongying:China University of Petroleum Press,2006:40-46.
[19]曹仁义,周焱斌,熊琪,等.低渗透油藏平面波及系数评价及改善潜力[J].油气地质与采收率,2015,22(1):74-77.Cao Renyi,Zhou Yanbin,Xiong Qi,et al.Evaluation and Improvement of Areal Sweep Efficiency for Low Permeability Reservoir[J].Petroleum Geology and Recovery Efficiency,2015,22(1):74-77.
[20]张连枝,程时清,付随艺,等.多分支水平井注采井网波及系数研究[J].天然气与石油,2013,31(2):55-57.Zhang Lianzhi,Cheng Shiqing,Fu Suiyi,et al.Study on Sweep Efficiency of Well Pattern with Vertical Injector and Multilateral Horizontal Producer[J].Natural Gas and Oil,2013,31(2):55-57.
[21]杨胜来,魏俊之.油层物理学[M].北京:石油工业出版社,2004:70-79.Yang Shenglai,Wei Junzhi.Reservoir Physics[M].Beijing:Petroleum Industry Press,2004:70-79.
[2]贾晓飞,李其正,杨静,等.基于剩余油分布的分层调配注水井注入量的方法[J].中国海上油气,2012,24(3):38-40.Jia Xiaofei,Li Qizheng,Yang Jing,et al.A Method to Allocate Injection Volume for Separate Layers in a Water-Injection Well Based on the Remaining Oil Distribution[J].China Offshore Oil and Gas,2012,24(3):38-40.
[3]王新华,黄建林,敖科,等.BP神经网络在井组配注中的应用[J].钻采工艺,2006,29(2):112-113.Wang Xinhua,Huang Jianlin,Ao Ke,et al.The Application of BP Neural Network in Well Group Injection[J].Drilling&Production Technology,2006,29(2):112-113.
[4]张俊.矢量化井网技术在胜二区沙二9-10中的应用[J].内江科技,2013,34(1):89.Zhang Jun.The Application of Vector Well Pattern Technique in E2S29-10 of Sheng Er Area[J].Neijiang Science and Technology,2013,34(1):89.
[5]伍志敏.稠油油田高含水期注采结构优化技术研究[D].大庆:大庆石油学院,2009.Wu Zhimin.The Research of Optimization Technology for Injection-Production Structure on High Water Cut Stage in Heavy Oil Field[D].Daqing:Daqing Petroleum Institute,2009.
[6]崔文富,赵红兵,吴伟,等.胜陀油田特高含水期油藏矢量层系井网产液结构调整研究[J].石油天然气学报,2012,34(6):127-131.Cui Wenfu,Zhao Hongbing,Wu Wei,et al.WellPattern Regulation in Liquid Producing Structure of Vector Stratum Series at Extra-high Water-cut Stage in Shengtuo Oilfield[J].Journal of Oil and Gas Technology,2012,34(6):127-131.
[7]李玲,黄炳光,谭星平,等.多元回归方法确定井组配注量[J].新疆石油地质,2006,27(3):357-358.Li Ling,Huang Bingguang,Tan Xingping,et al.Injection Allocation Rate Determination of Well Groups Using Multiple Regression Method[J].Xinjiang Petroleum Geology,2006,27(3):357-358.
[8]刘丽杰.胜坨油田特高含水后期矢量开发调整模式及应用[J].油气地质与采收率,2016,23(3):111-115.Liu Lijie.Vector Development Adjustment Modes and Its Application in Late Extra-high Water Cut Stage of Shengtuo Oilfield[J].Petroleum Geology and Recovery Efficiency,2016,23(3):111-115.
[9]赖书敏,魏明.特高含水后期矢量开发调整技术研究及应用[J].科学技术与工程,2015,15(7):50-52.Lai Shumin,Wei Ming.Research and Application of Vector Adjustment Development Technology in UltraHigh Water Cut Stage Reservoirs[J].Science Technology and Engineering,2015,15(7):50-52.
[10]苏彦春,李廷礼.海上砂岩油田高含水期开发调整实践[J].中国海上油气,2016,28(3):83-90.Su Yanchun,Li Tingli.Practice of Development Adjustment in Offshore Sandstone Oilfields in High Water Cut Stage[J].China Offshore Oil and Gas,2016,28(3):83-90.
[11]赵志峰.河流相砂岩油藏特高含水期井网调整技术研究[D].东营:中国石油大学,2007.Zhao Zhifeng.Study on Wel Pattern Adjustment Technology of Fluvial Sandstone Reservoir for Extremely High Water-cut Stage[D].Dongying:China University of Petroleum,2007.
[12]唐晓红.埕岛油田中高含水期综合调整对策研究[J].油气地质与采收率,2011,18(6):90-93.Tang Xiaohong.Comprehensive Adjustment Study on Chengdao Offshore Oilfield in Medium or High Water Cut Development Stage[J].Petroleum Geology and Recovery Efficiency,2011,18(6):90-93.
[13]姜振海.特高含水期水驱油藏井网调整效果研究[J].科学技术与工程,2011,11(9):2087-2089.Jiang Zhenhai.The Study on Well Pattern Adjustment Effect of Water Flooding Reservoir during Ultra High Water Cut Period[J].Science Technology and Engineering,2011,11(9):2087-2089.
[14]刘超,廖新武,李廷礼,等.海上特低幅构造稠油底水油藏水平井开发策略[J].特种油气藏,2013,20(4):81-84.Liu Chao,Liao Xinwu,Li Tingli,et al.Horizontal Well Strategy for Offshore Heavy Oil Reservoir with Bottom Water in Ultra-Low Relief Structure[J].Special Oil&Gas Reservoirs,2013,20(4):81-84.
[15]马超群,刘德华,黄磊,等.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(3):60-63.Ma Chaoqun,Liu Dehua,Huang Lei,et al.Selection of High Watery Period Oil Reservoir Development Options and Optimal Option Design[J].Natural Gas and Oil,2012,30(3):60-63.
[16]程林松.渗流力学[M].北京:石油工业出版社,2011:93-100.Cheng Linsong.Fluid Mechanics in Porous Medium[M].Beijing:Petroleum Industry Press,2011:93-100.
[17]武兵厂,姚军,吕爱民.水平井与垂直井联合井网波及系数研究[J].石油学报,2006,27(4):85-88.Wu Bingchang,Yao Jun,Lv Aimin.Research on Sweep Efficiency in Horizontal-Vertical Combined Well Pattern[J].Acta Petrolei Sinica,2006,27(4):85-88.
[18]姜汉桥,姚军.油藏工程原理与方法[M].东营:中国石油大学出版社,2006:40-46.Jiang Hanqiao,Yao Jun.Theory and Method of Reservoir Engineering[M].Dongying:China University of Petroleum Press,2006:40-46.
[19]曹仁义,周焱斌,熊琪,等.低渗透油藏平面波及系数评价及改善潜力[J].油气地质与采收率,2015,22(1):74-77.Cao Renyi,Zhou Yanbin,Xiong Qi,et al.Evaluation and Improvement of Areal Sweep Efficiency for Low Permeability Reservoir[J].Petroleum Geology and Recovery Efficiency,2015,22(1):74-77.
[20]张连枝,程时清,付随艺,等.多分支水平井注采井网波及系数研究[J].天然气与石油,2013,31(2):55-57.Zhang Lianzhi,Cheng Shiqing,Fu Suiyi,et al.Study on Sweep Efficiency of Well Pattern with Vertical Injector and Multilateral Horizontal Producer[J].Natural Gas and Oil,2013,31(2):55-57.
[21]杨胜来,魏俊之.油层物理学[M].北京:石油工业出版社,2004:70-79.Yang Shenglai,Wei Junzhi.Reservoir Physics[M].Beijing:Petroleum Industry Press,2004:70-79.