渤海Q油田隔夹层发育底水稠油油藏精细注采技术
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摘要
渤海Q油田底水稠油油藏隔夹层发育区域水平井提液效果差、注入水驱油效果不明显,针对该问题开展了精细注采技术研究。采用油藏工程方法,推导了隔夹层参数对产量影响大小的控制系数的表达式,结合油水两相渗流产能公式研究了隔夹层对产液量的控制作用;通过数值模拟和正交试验分析了注入水驱油效果差的原因,研究了隔夹层对注入水驱油的影响;针对笼统注水隔夹层上、下部吸水极度不均的情况,提出了依托隔夹层的层内分段注水新技术,并确定出了分段注水时各注水段的最优注采比。隔夹层发育底水稠油油藏精油注采技术在渤海Q油田进行了现场应用,取得了很好的效果。研究与实践表明,相同含水率条件下,产液量越大所需生产压差越大;对于隔夹层发育的底水油藏,"层内分段注水+大泵提液"高效开发模式具有很好的增油效果,可为海上稠油油藏高效开发提供理论依据和生产经验。
In bottom-water viscous oil reservoirs with interlayers in Bohai Q Oilfield,the horizontal wells experienced poor liquid enhancement effect and the injected water flooding efficiency was unobvious.Researches on fine injection-production were carried out to solve this problem.The reservoir engineering method was used to deduce the expression of control coefficient reflecting the influence of interlayer parameters on productivity,and together with oil-water two-phase seepage productivity formula,the control effect of interlayer on liquid production capacity was studied.By means of numerical simulation and orthogonal tests,the reasons of poor water flooding efficiency were analyzed,and the influence of interlayer on water flooding was studied.In view of the extremely uneven water absorption on the upper and lower parts of interlayers for commingled water injection,a new interlayer-based intrastratal staged water injection technology was proposed and the optimal injection/production ratio for each stage of water injection was determined.The studied fine injection-production technology for bottom-water viscous oil reservoir with interlayer was applied in Bohai Q Oilfield and achieved satisfying effect.The research and application results show that under the same water cut,the larger the liquid production capacity,the greater the production pressure difference should be.For bottom water reservoirs with interlayers,the efficient development mode of"intrastratal staged water injection+liquid enhancement by large-capacity pump"has achieved good oil production enhancement performance,which can provide theoretical basis and production experience for efficient development of offshore viscous oil reservoirs.
In bottom-water viscous oil reservoirs with interlayers in Bohai Q Oilfield,the horizontal wells experienced poor liquid enhancement effect and the injected water flooding efficiency was unobvious.Researches on fine injection-production were carried out to solve this problem.The reservoir engineering method was used to deduce the expression of control coefficient reflecting the influence of interlayer parameters on productivity,and together with oil-water two-phase seepage productivity formula,the control effect of interlayer on liquid production capacity was studied.By means of numerical simulation and orthogonal tests,the reasons of poor water flooding efficiency were analyzed,and the influence of interlayer on water flooding was studied.In view of the extremely uneven water absorption on the upper and lower parts of interlayers for commingled water injection,a new interlayer-based intrastratal staged water injection technology was proposed and the optimal injection/production ratio for each stage of water injection was determined.The studied fine injection-production technology for bottom-water viscous oil reservoir with interlayer was applied in Bohai Q Oilfield and achieved satisfying effect.The research and application results show that under the same water cut,the larger the liquid production capacity,the greater the production pressure difference should be.For bottom water reservoirs with interlayers,the efficient development mode of"intrastratal staged water injection+liquid enhancement by large-capacity pump"has achieved good oil production enhancement performance,which can provide theoretical basis and production experience for efficient development of offshore viscous oil reservoirs.
引文
[1]薛永超,程林松,张继龙.夹层对底水油藏开发及剩余油分布影响研究[J].西南石油大学学报(自然科学版),2010,32(3):101-106.XUE Yongchao,CHENG Linsong,ZHANG Jilong.The study on inter-bedded stratum model control in bottom water reservoir development and remaining oil distribution[J].Journal of Southwest Petroleum University(Science&Technology Edition),2010,32(3):101-106.
[2]张宗檩.正韵律厚油层层内夹层对水平井挖潜效果的影响分析[J].油气地质与采收率,2004,11(3):46-47.ZHANG Zonglin.Analysis of intrastratal interbed influence on the result of tapping the potential of the horizontal well in positive rhythm and thick oil-bearing formations[J].Petroleum Geology and Recovery Efficiency,2004,11(3):46-47.
[3]葛丽珍,李廷礼,李波,等.海上边底水稠油油藏大泵提液增产挖潜矿场试验研究[J].中国海上油气,2008,20(3):173-177.GE Lizhen,LI Tingli,LI Bo,et al.A field test study on increasing production by big-pump enhanced liquid for offshore heavy oil reservoirs with edge or bottom water[J].China Offshore Oil and Gas,2008,20(3):173-177.
[4]ZHANG Peng,WEN Xianhuan,GE Lizhen,et al.Existence of flow barriers improves horizontal well production in bottom water reservoirs[R].SPE 115348,2008.
[5]陈林,彭彩珍,孙雷,等.水驱油藏开发后期提液稳产研究[J].石油地质与工程,2007,21(6):47-49.CHEN Lin,PENG Caizhen,SUN Lei,et al.Research on enhanced liquid to keep steady production in development late stage of water:flooding reservoirs[J].Petroleum Geology and Engineering,2007,21(6):47-49.
[6]雷克林,王新海,陈建华.八面河油田莱5-4块中高含水期不同井型提液分析研究[J].石油天然气学报,2011,33(7):141-144.LEI Kelin,WANG Xinhai,CHEN Jianhua.Fluid lifting analysis approach of different types of wells in Block Lai 5-4of Bamianhe Oilfield at high water-cut stage[J].Journal of Oil and Gas Technology,2011,33(7):141-144.
[7]吴家文,王家春,刘剑,等.基于剩余油分布的分层注水方案优选[J].大庆石油学院学报,2006,30(4):12-15.WU Jiawen,WANG Jiachun,LIU Jian,et al.Optimization method for layered water injection project based on the distribution of remaining oil[J].Journal of Daqing Petroleum Institute,2006,30(4):12-15.
[8]郑小杰,钟伟,段洪泽,等.强底水油藏注水开发可行性研究[J].断块油气田,2015,22(2):234-236,250.ZHENG Xiaojie,ZHONG Wei,DUAN Hongze,et al.Feasibility study of waterflooding development for strong bottom water reservoir[J].Fault-Block Oil&Gas Field,2015,22(2):234-236,250.
[9]程秋菊,冯文光,彭小东,等.底水油藏注水开发水淹模式探讨[J].石油钻采工艺,2012,34(3):91-93.CHENG Qiuju,FENG Wenguang,PENG Xiaodong,et al.Discussion on flooding pattern for bottom water reservoirs driveling by water-injection[J].Oil Drilling&Production Technology,2012,34(3):91-93.
[10]JOSHI S D.Augmentation of well production using slant and horizontal wells[R].SPE 15375,1986.
[11]袁淋,李晓平,李松岑.低渗水驱油藏水平井见水后产能研究新方法[J].岩性油气藏,2015,27(3):127-132.YUAN Lin,LI Xiaoping,LI Songcen.New method for productivity study of horizontal well after water breakthrough in low permeability water flooding reservoir[J].Lithologic Reservoirs,2015,27(3):127-132.[编辑令文学]
[2]张宗檩.正韵律厚油层层内夹层对水平井挖潜效果的影响分析[J].油气地质与采收率,2004,11(3):46-47.ZHANG Zonglin.Analysis of intrastratal interbed influence on the result of tapping the potential of the horizontal well in positive rhythm and thick oil-bearing formations[J].Petroleum Geology and Recovery Efficiency,2004,11(3):46-47.
[3]葛丽珍,李廷礼,李波,等.海上边底水稠油油藏大泵提液增产挖潜矿场试验研究[J].中国海上油气,2008,20(3):173-177.GE Lizhen,LI Tingli,LI Bo,et al.A field test study on increasing production by big-pump enhanced liquid for offshore heavy oil reservoirs with edge or bottom water[J].China Offshore Oil and Gas,2008,20(3):173-177.
[4]ZHANG Peng,WEN Xianhuan,GE Lizhen,et al.Existence of flow barriers improves horizontal well production in bottom water reservoirs[R].SPE 115348,2008.
[5]陈林,彭彩珍,孙雷,等.水驱油藏开发后期提液稳产研究[J].石油地质与工程,2007,21(6):47-49.CHEN Lin,PENG Caizhen,SUN Lei,et al.Research on enhanced liquid to keep steady production in development late stage of water:flooding reservoirs[J].Petroleum Geology and Engineering,2007,21(6):47-49.
[6]雷克林,王新海,陈建华.八面河油田莱5-4块中高含水期不同井型提液分析研究[J].石油天然气学报,2011,33(7):141-144.LEI Kelin,WANG Xinhai,CHEN Jianhua.Fluid lifting analysis approach of different types of wells in Block Lai 5-4of Bamianhe Oilfield at high water-cut stage[J].Journal of Oil and Gas Technology,2011,33(7):141-144.
[7]吴家文,王家春,刘剑,等.基于剩余油分布的分层注水方案优选[J].大庆石油学院学报,2006,30(4):12-15.WU Jiawen,WANG Jiachun,LIU Jian,et al.Optimization method for layered water injection project based on the distribution of remaining oil[J].Journal of Daqing Petroleum Institute,2006,30(4):12-15.
[8]郑小杰,钟伟,段洪泽,等.强底水油藏注水开发可行性研究[J].断块油气田,2015,22(2):234-236,250.ZHENG Xiaojie,ZHONG Wei,DUAN Hongze,et al.Feasibility study of waterflooding development for strong bottom water reservoir[J].Fault-Block Oil&Gas Field,2015,22(2):234-236,250.
[9]程秋菊,冯文光,彭小东,等.底水油藏注水开发水淹模式探讨[J].石油钻采工艺,2012,34(3):91-93.CHENG Qiuju,FENG Wenguang,PENG Xiaodong,et al.Discussion on flooding pattern for bottom water reservoirs driveling by water-injection[J].Oil Drilling&Production Technology,2012,34(3):91-93.
[10]JOSHI S D.Augmentation of well production using slant and horizontal wells[R].SPE 15375,1986.
[11]袁淋,李晓平,李松岑.低渗水驱油藏水平井见水后产能研究新方法[J].岩性油气藏,2015,27(3):127-132.YUAN Lin,LI Xiaoping,LI Songcen.New method for productivity study of horizontal well after water breakthrough in low permeability water flooding reservoir[J].Lithologic Reservoirs,2015,27(3):127-132.[编辑令文学]