聚驱后油藏超高相对分子质量聚合物驱油技术
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摘要
河南油田已实施聚驱的开发单元中,共有18个区块已经转入后续水驱,聚合物驱后油藏仍然具有一定的潜力,进一步提高聚驱后油藏采出程度具有重要意义。根据河南油田生产需求,通过室内实验筛选评价了多种聚合物产品,实验结果表明:超高相对分子质量聚合物的增黏性以及黏弹性明显优于普通聚合物,其在地下渗流过程中具备更高的流度调整能力及驱油效率,聚合物驱后注入超高相对分子质量聚合物,可再次提高采收率10.5百分点。通过油藏数值模拟方法优化设计出最佳聚合物驱注采参数,并在下二门油田进行了15口注入井、36口采油井的超高相对分子质量聚驱现场应用,现场效果表明:超高相对分子质量聚合物驱技术可以作为聚驱后油藏进一步提高采收率的接替技术进行推广应用。
Eighteen polymer-flooded blocks of Henan Oilfield have entered the follow-up water flooding stage, there still exists a certain potential to be exploited for the polymer-flooded oil reservoir, so further enhancing the produced degree of this kind of the oil reservoir possesses very important significance. According to the production requirements of the oilfield, with the help of the laboratory experiments, many polymer products were selected and evaluated. The experimental results show that the increases of the UHMWP viscosity and viscoelasticity are obviously better than those of the ordinary polymers, and moreover this kind of polymer possesses pretty higher fluidity adjusting ability and oil displacing efficiency in the process of underground flow, the injected UHMWP after the polymer flooding can further enhance the oil recovery by 10.5 percentage points. With the help of the reservoir numerical simulating method, the optimal injection-production parameters of the polymer flooding were optimized, and moreover the UHMW polymer flooding was applied in 15 injecting wells and 36 producing wells in Xiaermen Oilfield, the field effects show that the UHMW polymer flooding technique can be regarded as the replacing technology and generalized for further enhancing the oil reservoir recovery after the polymer flooding.
Eighteen polymer-flooded blocks of Henan Oilfield have entered the follow-up water flooding stage, there still exists a certain potential to be exploited for the polymer-flooded oil reservoir, so further enhancing the produced degree of this kind of the oil reservoir possesses very important significance. According to the production requirements of the oilfield, with the help of the laboratory experiments, many polymer products were selected and evaluated. The experimental results show that the increases of the UHMWP viscosity and viscoelasticity are obviously better than those of the ordinary polymers, and moreover this kind of polymer possesses pretty higher fluidity adjusting ability and oil displacing efficiency in the process of underground flow, the injected UHMWP after the polymer flooding can further enhance the oil recovery by 10.5 percentage points. With the help of the reservoir numerical simulating method, the optimal injection-production parameters of the polymer flooding were optimized, and moreover the UHMW polymer flooding was applied in 15 injecting wells and 36 producing wells in Xiaermen Oilfield, the field effects show that the UHMW polymer flooding technique can be regarded as the replacing technology and generalized for further enhancing the oil reservoir recovery after the polymer flooding.
引文
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[9]张雪玲.大庆油田二类油层聚合物驱产油量模型应用[J].特种油气藏,2016,23(2):128-131.ZHANG Xueling.Polymer flooding production forecast model application in Class Ⅱ reservoir of Daqing Oilfield[J].Special Oil & Gas Reservoirs,2016,23(2):128-131.
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[12]张凡,何生,李洪生,等.二次聚合物驱微观可视模型驱油实验研究[J].石油地质与工程,2011,25 (1):111-114.ZHANG Fan,HE Sheng,LI Hongsheng,et al.Oil displacement experiment study of micro visual model in secondary polymer flooding[J].Petroleum Geology and Engineering,2011,25 (1):111-114.
[13]姚光庆,陶光辉,邱坤态.河南油田聚合物驱增油效果评价方法探讨[J].西安石油学院学报,2003,18 (3):28-31.YAO Guangqing,TAO Guanghui,QIU Kuntai.Study on evaluation of increasing oil production by polymer flooding in Henan Oilfield[J].Journal of Xi’an Petroleum Institute,2003,18 (3):28-31.
[14]孙风涛,杨永利,关振良,等.下二门油田剩余油分布状况及控制因素分析[J].海洋石油,2004,24(3):78-79.SUN Fengtao,YANG Yongli,GUAN Zhenliang,et al.The status and dominant factors of oil remained distribution in Xiaermen Oilfield[J].Offshore Oil,2004,24(3):78-79.
[15]徐学品,赵庆,黎锡瑜,等.下二门油田聚合物驱开发实践及认识[J].断块油气田,2002,9(3):50-51.XU Xuepin,ZHAO Qing,LI Xiyu,et al.Polymer flooding in high permeable and viscous Xiaermen Oilfield[J].Fault-Block Oil and Gas Field,2002,9(3):50-51.
[16]林杨,皇海权,王琦,等.高浓度、大段塞聚合物驱技术室内研究及矿场应用[J].油田化学,2014,31(2):274-277.LIN Yang,HUANG Haiquan,WANG Qi,et al.Laboratory research and field application of polymer flooding tecnology with high concentration and large pore volume[J].Oilfield Chemistry,2014,31(2):274-277.
[17]徐辉,孙秀芝,韩玉贵,等.超高分子量聚合物性能评价及微观结构研究[J].石油钻探技术,2013,41(3):114-118.XU Hui,SUN Xiuzhi,HAN Yugui,et al.Performance evaluation and microstructure study of ultra high molecular weight polymer[J].Petroleum Drilling Techniques,2013,41(3):114-118.
[2]樊中海,吕连海.河南油田聚合物驱矿场实践及经济效益浅析[J].河南石油,1999,13(6):1-6.FAN Zhonghai,Lü Lianhai.Field application of polymer flooding in Henan Oilfield and economic benefits analysis[J].Henan Oil,1999,13(6):1-6.
[3]李长宏.下二门油田核二段Ⅱ油组普通稠油油藏二次聚合物驱实践与认识[J].石油天然气学报,2012,34(5):121-124.LI Changhong.Practice and cognition of secondary polymer flooding in general heavy-oil reservoirs in Eh2 of Xiaermen Oilfield[J].Journal of Oil and Gas Technology,2012,34(5):121-124.
[4]姜建伟,郭恩常,王中华,等.双河油田提高非主力层动用挖潜技术对策研究[J].石油地质与工程,2011,25(4):87-89.JIANG Jianwei,GUO Enchang,WANG Zhonghua,et al.Study on potential exploitation measures of non-essential series of strata in Shuanghe Oilfield[J].Petroleum Geology and Engineering,2011,25(4):87-89.
[5]李洪生.正韵律油藏聚合物驱后泡沫驱超覆作用研究[J].特种油气藏,2018,25(1):100-103.LI Hongsheng.Overlapping effect of foal-flooding in the positive-rhythm reservoir after polymer-flooding[J].Special Oil & Gas Reservoirs,2018,25(1):100-103.
[6]邬侠,孙尚如,胡勇,等.聚合物驱后剩余油分布物理模拟实验研究[J].大庆石油地质与开发,2003,22(5):55-57.WU Xia,SUN Shangru,HU Yong,et al.Laboratory evaluation of distribution characteristics of remaining oil after polymer flooding[J].Petroleum Geology & Oilfield Development in Daqing,2003,22(5):55-57.
[7]王艳霞.双河油田Ⅳ5-11层系剩余油分布与复合驱井网重组研究[J].石油地质与工程,2012,26(1):29 -32.WANG Yanxia.Research on residual oil distribution and well pattern reconstruction of IV5-11 layer series with combination flooding of Shuanghe Oilfield[J].Petroleum Geology and Engineering,2012,26(1):29-32.
[8]韩培慧,赵群,穆爽书,等.聚合物驱后进一步提高采收率途径的研究[J].大庆石油地质与开发,2006,25(5):81-84.HAN Peihui,ZHAO Qun,MU Shuangshu,et al.Study on further EOR after polymer flooding[J].Petroleum Geology & Oilfield Development in Daqing,2006,25(5):81-84.
[9]张雪玲.大庆油田二类油层聚合物驱产油量模型应用[J].特种油气藏,2016,23(2):128-131.ZHANG Xueling.Polymer flooding production forecast model application in Class Ⅱ reservoir of Daqing Oilfield[J].Special Oil & Gas Reservoirs,2016,23(2):128-131.
[10]殷代印,项俊辉,房雨佳.低渗透油藏微乳液驱微观剩余油驱替机理研究[J].特种油气藏,2017,24(5):136-140.YIN Daiyin,XIANG Junhui,FANG Yujia.Study on microemulsion flooding mechanism for the residual oil in low-permeability reservoirs[J].Special Oil & Gas Reservoirs,2017,24(5):136-140.
[11]卢祥国,张云宝.聚合物驱后进一步提高采收率方法及其作用机理研究[J].大庆石油地质与开发,2007,26(6):113-118.LU Xiangguo,ZHANG Yunbao.EOR methods after polymer flooding and their action mechanisms[J].Petroleum Geology & Oilfield Development in Daqing,2007,26(6):113-118.
[12]张凡,何生,李洪生,等.二次聚合物驱微观可视模型驱油实验研究[J].石油地质与工程,2011,25 (1):111-114.ZHANG Fan,HE Sheng,LI Hongsheng,et al.Oil displacement experiment study of micro visual model in secondary polymer flooding[J].Petroleum Geology and Engineering,2011,25 (1):111-114.
[13]姚光庆,陶光辉,邱坤态.河南油田聚合物驱增油效果评价方法探讨[J].西安石油学院学报,2003,18 (3):28-31.YAO Guangqing,TAO Guanghui,QIU Kuntai.Study on evaluation of increasing oil production by polymer flooding in Henan Oilfield[J].Journal of Xi’an Petroleum Institute,2003,18 (3):28-31.
[14]孙风涛,杨永利,关振良,等.下二门油田剩余油分布状况及控制因素分析[J].海洋石油,2004,24(3):78-79.SUN Fengtao,YANG Yongli,GUAN Zhenliang,et al.The status and dominant factors of oil remained distribution in Xiaermen Oilfield[J].Offshore Oil,2004,24(3):78-79.
[15]徐学品,赵庆,黎锡瑜,等.下二门油田聚合物驱开发实践及认识[J].断块油气田,2002,9(3):50-51.XU Xuepin,ZHAO Qing,LI Xiyu,et al.Polymer flooding in high permeable and viscous Xiaermen Oilfield[J].Fault-Block Oil and Gas Field,2002,9(3):50-51.
[16]林杨,皇海权,王琦,等.高浓度、大段塞聚合物驱技术室内研究及矿场应用[J].油田化学,2014,31(2):274-277.LIN Yang,HUANG Haiquan,WANG Qi,et al.Laboratory research and field application of polymer flooding tecnology with high concentration and large pore volume[J].Oilfield Chemistry,2014,31(2):274-277.
[17]徐辉,孙秀芝,韩玉贵,等.超高分子量聚合物性能评价及微观结构研究[J].石油钻探技术,2013,41(3):114-118.XU Hui,SUN Xiuzhi,HAN Yugui,et al.Performance evaluation and microstructure study of ultra high molecular weight polymer[J].Petroleum Drilling Techniques,2013,41(3):114-118.