泡沫堵水体系工艺参数优选实验研究
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摘要
针对海上油田长期水驱开发后油井水窜严重、含水率过高严重影响油井质量的问题,通过室内实验,对泡沫堵水体系进行了评价优选:确定SD型起泡剂的最佳质量分数为1.0%,HK海水速溶型聚合物为稳泡剂,最优质量分数为0.1%。综合上述实验结果,得到最优泡沫堵剂体系为1.0%SD型起泡剂+0.1%HK海水速溶型聚合物。通过泡沫堵水三维模拟实验装置,对泡沫注入参数进行优选,实验结果表明,该泡沫体系最优段塞注入量为0.3～0.5 PV,最优注入时机为含水率80%～90%时,此条件下三维岩心综合采收率提升幅度最大,分流效果最佳,且注泡沫后含水率下降漏斗最为明显。
After long term waterflooding,there is serious water channeling in the oil wells in offshore oilfield,and the water cut of produced fluid is high,which can be improved by foam water plugging technology.Through laboratory experiments,the foam water plugging system was optimized:the best mass fraction of SD foaming agent is 1%;HK sea water soluble polymer was selected as foam stabilizer and its optimal mass fraction is 0.1%.The optimum foam water plugging system is 1.0% SD foaming agent +0.1%HK seawater soluble polymer.The foam injection parameters were optimized through three dimensional foam water plugging simulation device.The experimental results show that the optimum slug of the foam system is 0.3～0.5 PV,and the optimal injection time is the water-cut of 80%～90%.Under these conditions,the comprehensive recovery factor of three dimensional cores is the highest,the diversion effect is the best,and the water-cut decreasing funnel is the most obvious after foam injection.
After long term waterflooding,there is serious water channeling in the oil wells in offshore oilfield,and the water cut of produced fluid is high,which can be improved by foam water plugging technology.Through laboratory experiments,the foam water plugging system was optimized:the best mass fraction of SD foaming agent is 1%;HK sea water soluble polymer was selected as foam stabilizer and its optimal mass fraction is 0.1%.The optimum foam water plugging system is 1.0% SD foaming agent +0.1%HK seawater soluble polymer.The foam injection parameters were optimized through three dimensional foam water plugging simulation device.The experimental results show that the optimum slug of the foam system is 0.3～0.5 PV,and the optimal injection time is the water-cut of 80%～90%.Under these conditions,the comprehensive recovery factor of three dimensional cores is the highest,the diversion effect is the best,and the water-cut decreasing funnel is the most obvious after foam injection.
引文
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[9] LI S,LI Z,LI B.Experimental study and application on profile control using high-temperature foam[J].Journal of Petroleum Science & Engineering,2011,78(3):567-574.
[10] 王佩华.泡沫堵水调剖技术综述[J].钻采工艺,2000,23(2):60-61.WANG Peihua.Overview on technology of water shutoff/profile control agent of foam[J].Drilling & Production Technology,2000,23(2):60-61.
[11] JIA Y P,WANG Y F,LONG H E,et al.Influencing factors for polyacrylamide/polyethyleneimine gelling fluid as water shutoff/profile modification agent[J].Oilfield Chemistry,2007,24(4):316-319.
[12] EXPECTATIVAS E A T.Experimental study on the mechanism of the foam profile control and channel plugging[J].Journal of Chongqing University of Science & Technology,2011,16(4):507-532.
[13] LIAO J.Gel treatment field application survey for water shut off in production wells[J].Dissertations & Theses - Gradworks,2014,5732:196-210.
[14] 刘中春,侯吉瑞,岳湘安,等.泡沫复合驱微观驱油特性分析[J].石油大学学报(自然科学版),2003,5(1):42-44.LIU Zhongchun,HOU Jirui,YUE Xiang'an,et al.Analysis of microscopic displacement characteristics of foam flooding[J].Journal of China University of Petroleum(Edition of Natural Science),2003,5(1):42-44.
[15] ZUTA J,FJELDE I.Transport of a CO2-foaming agent during CO2-foam processes in fractured chalk rock [C].SPE-121253,2009.
[2] 周伟,肖建洪,陈辉,等.发泡剂筛选试验及在油井堵水调剖中的应用[J].石油天然气学报,2002,24(1):64-65.ZHOU Wei,XIAO Jianhong,CHEN Hui,et al.Screening test of foaming agent and its application in water shutoff and profile control of oil wells[J].Journal of Oil and Gas Technology,2002,24(1):64-65.
[3] ZHAO G,DAI C,ZHANG Y,et al.Enhanced foam stability by adding comb polymer gel for in-depth profile control in high temperature reservoirs[J].Colloids & Surfaces A Physicochemical & Engineering Aspects,2015,482(3):115-124.
[4] EXPECTATIVAS E A T.Experimental study on the mechanism of the foam profile control and channel plugging[J].Journal of Chongqing University of Science & Technology,2011,16(4):507-532.
[5] 何万雄.我国泡沫型堵水调剖剂的应用现状与发展趋势研究[J].中国石油和化工标准与质量,2011,31(6):46.HE Wanxiong.Application status and development trend of foam water shutoff and profile control agents in China[J].China Petroleum and Chemical Standard and Quality,2011,31(6):46.
[6] WANG H T,YI Xiangyi,LI Xiangfang,et al.Experiment on CO2 foam profile control in high temperature and high salinity reservoir[J].Xinjiang Petroleum Geology,2009,30(5):641-643.
[7] 赵长久,麻翠杰,杨振宇,等.超低界面张力泡沫体系驱先导性矿场试验研究[J].石油勘探与开发,2005,32(1):127-130.ZHAO Changjiu,MA Cuijie,YANG Zhenyu,et al.Pilots of ultra-low interfacial tension foam flooding[J].Petroleum Exploration & Development,2005,32(1):127-130.
[8] 戴彩丽,冯海顺,简家斌,等.耐高温冻胶泡沫选择性堵水剂:适用于东海气田高温气藏堵水稳产[J].天然气工业,2015,35(3):60-67.DAI Caili,FENG Haishun,JIAN Jiabin,et al.A Selective water-plugging system with heat-resistant gel foam:a case study from the East Sea Gas Field[J].Natural Gas Industry,2015,35(3):60-67.
[9] LI S,LI Z,LI B.Experimental study and application on profile control using high-temperature foam[J].Journal of Petroleum Science & Engineering,2011,78(3):567-574.
[10] 王佩华.泡沫堵水调剖技术综述[J].钻采工艺,2000,23(2):60-61.WANG Peihua.Overview on technology of water shutoff/profile control agent of foam[J].Drilling & Production Technology,2000,23(2):60-61.
[11] JIA Y P,WANG Y F,LONG H E,et al.Influencing factors for polyacrylamide/polyethyleneimine gelling fluid as water shutoff/profile modification agent[J].Oilfield Chemistry,2007,24(4):316-319.
[12] EXPECTATIVAS E A T.Experimental study on the mechanism of the foam profile control and channel plugging[J].Journal of Chongqing University of Science & Technology,2011,16(4):507-532.
[13] LIAO J.Gel treatment field application survey for water shut off in production wells[J].Dissertations & Theses - Gradworks,2014,5732:196-210.
[14] 刘中春,侯吉瑞,岳湘安,等.泡沫复合驱微观驱油特性分析[J].石油大学学报(自然科学版),2003,5(1):42-44.LIU Zhongchun,HOU Jirui,YUE Xiang'an,et al.Analysis of microscopic displacement characteristics of foam flooding[J].Journal of China University of Petroleum(Edition of Natural Science),2003,5(1):42-44.
[15] ZUTA J,FJELDE I.Transport of a CO2-foaming agent during CO2-foam processes in fractured chalk rock [C].SPE-121253,2009.