改善注聚油层动用程度的合理压力系统
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摘要
针对注聚中后期含水率急速上升、各油层动用程度差异大的现象,提出了一种改善油层动用程度的新方法,分阶段合理调整压力系统确定阶段产液水平,并已在矿场试验中取得了较好的效果。以大庆喇嘛甸油田为例,应用数值模拟技术研究了调整流压后产液量、压力、含水率等多项开发指标的变化规律,对比开发效果表明,聚合物驱保持6 MPa(较高)-2 MPa(较低)-6 MPa(较高)流压时,注聚1.0PV后含水率降低1.46%,聚驱采出程度提高约2.43%,各层开发动用程度最好。
For the phenomenon that the rapid rise of water cut and a big difference in using degree between various layer types in the late stage of polymer injection,a new method that has achieved good results in field test is proposed.The flow pressure can be reasonably adjusted by stage andproduction levels can also be determined.For example,Lamadian Daqing Oilfield,variation of development indicators(such as production,pressure profile,etc)is studied after adjusting flow pressure through numerical simulation techniques.Compared to development effect,it is showed that when flow pressure is kept 6 MPa(higher)-2 MPa(lower)-6 MPa(higher),water cut is reduced by 1.46 percentage points,and degree of polymer flooding cumulative recovery is reduced by about 2.43 percentage points after 1.0PV is injected,of which producing degree is best.
For the phenomenon that the rapid rise of water cut and a big difference in using degree between various layer types in the late stage of polymer injection,a new method that has achieved good results in field test is proposed.The flow pressure can be reasonably adjusted by stage andproduction levels can also be determined.For example,Lamadian Daqing Oilfield,variation of development indicators(such as production,pressure profile,etc)is studied after adjusting flow pressure through numerical simulation techniques.Compared to development effect,it is showed that when flow pressure is kept 6 MPa(higher)-2 MPa(lower)-6 MPa(higher),water cut is reduced by 1.46 percentage points,and degree of polymer flooding cumulative recovery is reduced by about 2.43 percentage points after 1.0PV is injected,of which producing degree is best.
引文
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[2]王代流.河流相沉积油藏聚合物驱油开发效果的影响因素[J].油气地质与采收率,2009,16(1):62-65.Wang Dailiu.Influencing factors of the effect of polymer flooding production in oil reservoirs of fluvial facies sedimentation[J].Petroleum Geology and Recovery Efficiency,2009,16(1):62-65.
[3]赵政涛.大庆B过渡带葡一组油层聚合物驱油开发研究[D].长春:吉林大学,2012.
[4]马艳,周生友,刘大猛,等.改善双河油田二类储量高温聚合物驱开发效果对策研究[J].石油地质与工程,2010,24(6):82-84.Ma Yan,Zhou Shengyou,Liu Dameng,et al.Countermeasures to improve the development effect of class II reserves with high temperature polymer flooding in Shuang-he oilfield[J].Petroleum Geology and Engineering,2010,24(6):82-84.
[5]耿娜,杨东东,刘小鸿,等.渤海油田聚合物驱储层吸水剖面变化特征及影响因素研究[J].石油天然气学报,2013,35(7):127-130.Geng Na,Yang Dongdong,Liu Xiaohong,et al.Injection profile behaviors and its influential factors of polymer flooding reservoir in bohai oilfield[J].Journal of Oil and Gas Technology,2013,35(7):127-130.
[6]侯维虹.聚合物驱油层吸水剖面变化规律[J].石油勘探与开发,2007,34(4):478-482.Hou Weihong.Water injection profile variation of oil layers under polymer flooding[J].Petroleum Exploration and Development,2007,34(4):478-482.
[7]文华.萨中二三类油层开发效果及二三结合开发调整研究[D].大庆:大庆石油学院,2008.
[8]张晓芹,关恒.改善二类油层聚合物驱开发效果的途径[J].大庆石油地质与开发,2005,24(4):81-83.Zhang Xiaoqin,Guan Heng.Methods to improve development results of polymer flooding in class II reservoirs[J].Petroleum Geology&Oilfield Development in Daqing,2005,24(4):81-83.
[9]柴方源.提高聚合物驱开发效果研究及经济效益分析[D].北京:中国地质大学(北京),2013.
[10]闫文华.大庆油田二类油层改善聚驱效果方法研究[D].大庆:大庆石油学院,2008.
[11]何婷.注水开发油藏合理压力系统评价[J].辽宁化工,2011,40(11):1176-1178.He Ting.Evaluation of reasonable pressure system in water-injection development of oil field[J].Liaoning Chemical Industry,2011,40(11):1176-1178.