特高含水期驱替倍数量化表征及调整对策
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摘要
特高含水期油藏经过长期注水开发,在平面、纵向上存在驱替不均衡现象,影响水驱开发效果。为了达到均衡驱替的目的,利用数值模拟技术提出了驱替倍数量化表征方法,识别表征油藏不同位置处驱替程度的差异,根据驱替倍数与剩余油饱和度及采出程度的关系对其进行分级评价,将特高含水期油藏分为弱驱富集区、强驱替区、高耗水区和无效注水4个区域,并确定了不同区域驱替倍数的分布模式,在此基础上形成了提高弱驱富集区驱替倍数,转变强驱替区液流方向,注采调配控制高耗水区,封堵调控遏制无效注水等均衡驱替技术对策。针对双河油田Ⅷ-Ⅸ油组提出了井网调整优化方案,现场实施后提高水驱采收率1.43%,应用效果较好。
After the long-term water flooding,the oil reservoirs in the ultra-high water cut stage have unbalanced displacement in the plane and vertical direction,which affects their development effect.In order to achieve the equilibrium displacement,a numerical simulation technique was proposed to quantitatively characterize the displacement multiple and identify the difference in the displacement degree at different positions of the reservoir.According to the relationship among displacement multiple,residual oil saturation,and percentage recovery of OOIP,the displacement multiple was graded and evaluated.The ultra-high water cut reservoir was divided into four zones:weak displacement zone,strong displacement zone,high water consumption zone,and ineffective water injection zone.The distribution pattern of displacement multiple in different zones was determined,basis on this,the strategies for improving the displacement multiple of the weak displacement zone,changing the direction of liquid flow in the strong displacement zone,controlling the high water consumption zone by injection and production,and restraining and regulating the ineffective water injection were formed.The well pattern adjustment and optimization scheme of theⅧ-Ⅸoil zones in Shuanghe Oilfield was proposed.After the implementation,the waterflood recovery factor was increased by 1.43%,which achieved good application results.
After the long-term water flooding,the oil reservoirs in the ultra-high water cut stage have unbalanced displacement in the plane and vertical direction,which affects their development effect.In order to achieve the equilibrium displacement,a numerical simulation technique was proposed to quantitatively characterize the displacement multiple and identify the difference in the displacement degree at different positions of the reservoir.According to the relationship among displacement multiple,residual oil saturation,and percentage recovery of OOIP,the displacement multiple was graded and evaluated.The ultra-high water cut reservoir was divided into four zones:weak displacement zone,strong displacement zone,high water consumption zone,and ineffective water injection zone.The distribution pattern of displacement multiple in different zones was determined,basis on this,the strategies for improving the displacement multiple of the weak displacement zone,changing the direction of liquid flow in the strong displacement zone,controlling the high water consumption zone by injection and production,and restraining and regulating the ineffective water injection were formed.The well pattern adjustment and optimization scheme of theⅧ-Ⅸoil zones in Shuanghe Oilfield was proposed.After the implementation,the waterflood recovery factor was increased by 1.43%,which achieved good application results.
引文
[1]吴晓慧.大庆长垣油田特高含水期水驱精细挖潜措施后产量变化规律[J].大庆石油地质与开发,2018,37(5):71-75.WU Xiaohui.Changed laws of the production after waterflooding finely-tapped-potential stimulations for Daqing Placanticline Oilfields at the stage of extra-high watercut[J].Petroleum Geology&Oilfield Development in Daqing,2018,37(5):71-75.
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[5]崔传智,刘力军,丰雅,等.基于均衡驱替的分段注水层段划分及合理配注方法[J].油气地质与采收率,2017,24(4):67-71.CUI Chuanzhi,LIU Lijun,FENG Ya,et al.Layer classification and rational sectional water injection allocation method based on equilibrium displacement[J].Petroleum Geology and Recovery Efficiency,2017,24(4):67-71.
[6]严科,张俊,王本哲,等.平面非均质油藏均衡水驱调整方法研究[J].特种油气藏,2015,22(5):86-89.YAN Ke,ZHANG Jun,WANG Benzhe,et al.Balance water flooding adjustment of plane heterogeneous reservoirs[J].Special Oil&Gas Reservoirs,2015,22(5):86-89.
[7]吕洲,王玉普,李莉,等.油气储层岩心实验的样本量设计[J].石油实验地质,2018,40(4):589-594.LüZhou,WANG Yupu,LI Li,et al.Sample size design for oil and gas reservoir core-plug experiments[J].Petroleum Geology&Experiment,2018,40(4):589-594.
[8]王继强,岳圣杰,宋瑞文,等.特高含水期油田水驱特征曲线优化研究[J].特种油气藏,2017,24(5):97-101.WANG Jiqiang,YUE Shengjie,SONG Ruiwen,et al.Optimization of characteristic curves for water flooding operations in development of oilfields in stages with extremely high water cut[J].Special Oil&Gas Reservoirs,2017,24(5):97-101.
[9]赵艳武,杜殿发,王冠群,等.水驱油田特高含水期含水率预测模型[J].特种油气藏,2016,23(5):110-113.ZHAO Yanwu,DU Dianfa,WANG Guanqun,et al.Water-cut prediction model of waterflooding oilfield with extra-high water-cut[J].Special Oil&Gas Reservoirs,2016,23(5):110-113.
[10]耿正玲.特高含水期多层油藏纵向均衡驱替优化研究[D].东营:中国石油大学(华东),2013.GENG Zhengling.The optimization research of vertical equilibrium displacement for multilayer reservoir in ultra-high water cut stage[D].Dongying:China University of Petroleum(East China),2013.
[11]陈波.特高含水油田有效注水增产对策研究[D].成都:西南石油大学,2012.CHEN Bo.Study on countermeasures for yield increasing by effective water injection in ultra-high water cut oilfields[D].Chengdu:Southwest Petroleum University,2012.
[12]王平,姜瑞忠,王公昌,等.高含水期水驱状况影响因素数值模拟研究[J].天然气与石油,2012,30(4):36-38.WANG Ping,JIANG Ruizhong,WANG Gongchang,et al.Numerical simulation of factors affecting water-flooding in high watercut stage[J].Natural Gas and Oil,2012,30(4):36-38.
[2]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.
[3]柏明星,张志超,梁健巍.中高渗透砂岩油田优势流场识别与调整[J].油气地质与采收率,2017,24(1):100-105.BAI Mingxing,ZHANG Zhichao,LIANG Jianwei.Identification and adjustment of streamline field in middle-high permeability sandstone oilfield[J].Petroleum Geology and Recovery Efficiency,2017,24(1):100-105.
[4]黄迎松.特高含水阶段油藏水驱规律研究[J].特种油气藏,2018,25(1):95-99.HUANG Yingsong.Waterflooding performance of oil reservoir in ultra-high water-cut stage[J].Special Oil&Gas Reservoirs,2018,25(1):95-99.
[5]崔传智,刘力军,丰雅,等.基于均衡驱替的分段注水层段划分及合理配注方法[J].油气地质与采收率,2017,24(4):67-71.CUI Chuanzhi,LIU Lijun,FENG Ya,et al.Layer classification and rational sectional water injection allocation method based on equilibrium displacement[J].Petroleum Geology and Recovery Efficiency,2017,24(4):67-71.
[6]严科,张俊,王本哲,等.平面非均质油藏均衡水驱调整方法研究[J].特种油气藏,2015,22(5):86-89.YAN Ke,ZHANG Jun,WANG Benzhe,et al.Balance water flooding adjustment of plane heterogeneous reservoirs[J].Special Oil&Gas Reservoirs,2015,22(5):86-89.
[7]吕洲,王玉普,李莉,等.油气储层岩心实验的样本量设计[J].石油实验地质,2018,40(4):589-594.LüZhou,WANG Yupu,LI Li,et al.Sample size design for oil and gas reservoir core-plug experiments[J].Petroleum Geology&Experiment,2018,40(4):589-594.
[8]王继强,岳圣杰,宋瑞文,等.特高含水期油田水驱特征曲线优化研究[J].特种油气藏,2017,24(5):97-101.WANG Jiqiang,YUE Shengjie,SONG Ruiwen,et al.Optimization of characteristic curves for water flooding operations in development of oilfields in stages with extremely high water cut[J].Special Oil&Gas Reservoirs,2017,24(5):97-101.
[9]赵艳武,杜殿发,王冠群,等.水驱油田特高含水期含水率预测模型[J].特种油气藏,2016,23(5):110-113.ZHAO Yanwu,DU Dianfa,WANG Guanqun,et al.Water-cut prediction model of waterflooding oilfield with extra-high water-cut[J].Special Oil&Gas Reservoirs,2016,23(5):110-113.
[10]耿正玲.特高含水期多层油藏纵向均衡驱替优化研究[D].东营:中国石油大学(华东),2013.GENG Zhengling.The optimization research of vertical equilibrium displacement for multilayer reservoir in ultra-high water cut stage[D].Dongying:China University of Petroleum(East China),2013.
[11]陈波.特高含水油田有效注水增产对策研究[D].成都:西南石油大学,2012.CHEN Bo.Study on countermeasures for yield increasing by effective water injection in ultra-high water cut oilfields[D].Chengdu:Southwest Petroleum University,2012.
[12]王平,姜瑞忠,王公昌,等.高含水期水驱状况影响因素数值模拟研究[J].天然气与石油,2012,30(4):36-38.WANG Ping,JIANG Ruizhong,WANG Gongchang,et al.Numerical simulation of factors affecting water-flooding in high watercut stage[J].Natural Gas and Oil,2012,30(4):36-38.
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