泡沫体系改善早期聚合物驱效果实验研究
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摘要
为探索海上油田早期聚合物驱后进一步提高采收率的途径,开展了注入泡沫体系改善早期聚合物驱效果实验研究。采用双管并联岩心实验,研究聚合物驱注入不同尺寸泡沫体系以及不同含水率时注入泡沫体系对岩心采收率的影响。实验结果表明:注入泡沫体系的聚合物驱比纯聚合物驱可进一步提高采收率9.9%;随着泡沫体系注入量的增加,提高采收率幅度也增大,注入0.5 PV泡沫体系比0.3 PV泡沫体系的聚合物驱可提高采收率6.9%,相比纯聚合物驱可提高16.3%。在早期聚合物驱后的高含水率阶段注入泡沫体系,注入时机越晚,提高采收率幅度越大,在注入相同尺寸泡沫体系条件下(0.3 PV),含水率为98%时注入泡沫体系的聚合物驱比含水率为85%时注入采收率可提高9.9%。说明含水率阶段对于泡沫体系的稳定性有重要影响,泡沫体系注入时机越晚,泡沫体系越稳定且强度越大,泡沫体系聚合物驱建立阻力的有效时间越长,对于低渗透层的动用效果越好,采收率提高幅度越大。
Paralleled cores flooding experiments were carried out to evaluate effect of foam flooding after polymer floodingunder different water cut. The experimental results showed that polymer flooding followed by 0.3 PV foam slug could im-prove additional 9.9% oil recovery. The larger size of foam slug was,the more enhanced oil recovery could reach. The oil re-covery in the polymer flooding followed by more 0.5 PV foam slug increased by 6.9% than that in the polymer flooding fol-lowed by 0.3 PV foam slug,or 16.3% more than that in the polymer flooding only. When the foam was injected at differenthigh water cut stage after early polymer flooding,the higher the water cut was,the greater the oil recovery increased. Fol-lowed by same foam slug injection size(0.3 PV),when 85% and 98% water cut was reached respectively,it was found thatoil recovery in the polymer flooding could increase by 9.9% more. The results showed that the water cut stage had an impor-tant influence on the stability of the foam. The later foam was injected,the weaker crude oil defoaming effect was in thehigh permeability layers,the foam would be more stable and stronger,effective time of resistance retaining would be longer,the low permeability layers would be better exploited.
Paralleled cores flooding experiments were carried out to evaluate effect of foam flooding after polymer floodingunder different water cut. The experimental results showed that polymer flooding followed by 0.3 PV foam slug could im-prove additional 9.9% oil recovery. The larger size of foam slug was,the more enhanced oil recovery could reach. The oil re-covery in the polymer flooding followed by more 0.5 PV foam slug increased by 6.9% than that in the polymer flooding fol-lowed by 0.3 PV foam slug,or 16.3% more than that in the polymer flooding only. When the foam was injected at differenthigh water cut stage after early polymer flooding,the higher the water cut was,the greater the oil recovery increased. Fol-lowed by same foam slug injection size(0.3 PV),when 85% and 98% water cut was reached respectively,it was found thatoil recovery in the polymer flooding could increase by 9.9% more. The results showed that the water cut stage had an impor-tant influence on the stability of the foam. The later foam was injected,the weaker crude oil defoaming effect was in thehigh permeability layers,the foam would be more stable and stronger,effective time of resistance retaining would be longer,the low permeability layers would be better exploited.
引文
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[13]元福卿,王其伟,李宗阳,等.油相对泡沫稳定性的影响规律[J].油气地质与采收率,2015,22(1):118-121.YUAN Fuqing,WANG Qiwei,LI Zongyang,et al.Relationship between oil and foam stability[J].Petroleum Geology and Recovery Efficiency,2015,22(1):118-121.
[14]RAI Y,TAKAHAMA T,SAGARA Y,et al.Microvisual and coreflood studies of foam interactions with a light crude oil[J].SPEReservoir Engineering,1993,8(3):201-206.
[15]ZARGARTALEBI M,KHARRAT R,BARATI N.Enhancement of surfactant flooding performance by the use of silica nanoparticles[J].Fuel,2015,143:21-27.
[16]SINGH R,MOHANTY K K.Synergy between nanoparticles and surfactants in stabilizing foams for oil recovery[J].Energy&Fuels,2015,29(2):467-479.
[17]SINGH R,MOHANTY K K.Foam flow in a layered,heterogeneous porous medium:A visualization study[J].Fuel,2017,197:58-69.
[18]LU Teng,LI Zhaomin,ZHOU Yan.Flow behavior and displacement mechanisms of nanoparticle stabilized foam flooding for enhanced heavy oil recovery[J].Energies,2017,10(4):560.
[19]孙琳,赵凡琪,张芸,等.高温高盐底水油藏氮气泡沫压锥实验研究[J].油气地质与采收率,2017,24(6):97-102.SUN Lin,ZHAO Fanqi,ZHANG Yun,et al.An experimental study of coning control with nitrogen foam in high-temperature and high-salinity bottom water reservoirs[J].Petroleum Geology and Recovery Efficiency,2017,24(6):97-102.
[20]寇永强.坨11区块泡沫驱油的室内研究与现场实践[J].油田化学,2005,22(2):184-187.KOU Yongqiang.Foam flood to enhance oil recovery in block Tuo-11:laboratory study and field practice[J].Oilfield Chemistry,2005,22(2):184-187.
[21]康宵瑜,王维波,汤瑞佳,等.空气泡沫驱油技术在低温特低渗油藏中的应用--以甘谷驿油田唐80井区为例[J].非常规油气,2016,3(3):68-74.KANG Xiaoyu,WANG Weibo,TANG Ruijia,et al.Application of air-foam flooding to low-temperature and ultralow-permeability reservoir-a case study of Tang80 well area in Ganguyi Oilfield[J].Unconventional Oil&Gas,2016,3(3):68-74.
[22]陈玉英,刘子聪,陈清伟,等.百色油田泡沫驱油效果初步分析[J].油田化学,1998,(2):141-145.CHEN Yuying,LIU Zicong,CHEN Qingwei,et al.A preliminary analysis of the field results of foam flood in Baise oil fields[J].Oilfield Chemistry,1998,(2):141-145.
[23]ZHU T,AND Doo,KHATANIAR S.Improving the foam performance for mobility control and improved sweep efficiency in gas flooding[J].Industrial&Engineering Chemistry Research,2004,43(15):4 413-4 421.
[2]王杰祥,张琪,李爱山,等.注空气驱油室内实验研究[J].中国石油大学学报:自然科学版,2003,27(4):73-75.WANG Jiexiang,ZHANG Qi,LI Aishan,et al.Laboratary experiment on efficiency of air injection displacement[J].Journal of the University of Petroleum,China:Edition of Natural Science,2003,27(4):73-75.
[3]赵凤兰,屈鸣,吴颉衡,等.缝洞型碳酸盐岩油藏氮气驱效果影响因素[J].油气地质与采收率,2017,24(1):69-74.ZHAO Fenglan,QU Ming,WU Jieheng,et al.Influencing factors of the effect of nitrogen gas drive in fractured-vuggy carbonate reservoir[J].Petroleum Geology and Recovery Efficiency,2017,24(1):69-74.
[4]郑泽宇,朱倘仟,侯吉瑞,等.碳酸盐岩缝洞型油藏注氮气驱后剩余油可视化研究[J].油气地质与采收率,2016,23(2):93-97.ZHENG Zeyu,ZHU Tangqian,HOU Jirui,et al.Visible research on remaining oil after nitrogen flooding in fractured-cavity carbonate reservoir[J].Petroleum Geology and Recovery Efficiency,2016,23(2):93-97.
[5]王友启,周梅,聂俊.提高采收率技术的应用状况及发展趋势[J].断块油气田,2010,17(5):628-631.WANG Youqi,ZHOU Mei,NIE Jun.Application status and development trend of EOR technology[J].Fault-Block Oil&Gas Field,2010,17(5):628-631.
[6]高淑玲,张鹤川,闫伟,等.聚驱后井网加密高质量浓度聚合物驱提高采收率试验[J].大庆石油地质与开发,2016,35(3):94-98.GAO Shuling,ZHANG Hechuan,YAN Wei,et al.High-concentration polymer flooding field test with well infilling after polymer flooding[J].Petroleum Geology&Oilfield Development in Daqing,2016,35(3):94-98.
[7]陈朝辉.边水油藏聚合物驱风险分析[J].特种油气藏,2016,23(1):116-119.CHEN Zhaohui.Polymer flooding risk assessment in edge-aquifer reservoir[J].Special Oil&Gas Reservoirs,2016,23(1):116-119.
[8]王杰祥,李娜,孙红国,等.非均质油层空气泡沫驱提高采收率试验研究[J].石油钻探技术,2008,36(2):4-6.WANG Jiexiang,LI Na,SUN Hongguo,et al.Experiment study of improved oil recovery through air foam flooding in heterogeneous reservoir[J].Petroleum Drilling Techniques,2008,36(2):4-6.
[9]陈辉.非均质油藏特高含水开发期空气泡沫驱实验研究[J].山东大学学报:工学版,2011,41(1):120-125.CHEN Hui.Experimental studies on air-foam flooding in a heterogeneous reservoir at late high water cut stage[J].Journal of Shandong University:Engineering Science,2011,41(1):120-125.
[10]王德民,程杰成,吴军政,等.聚合物驱油技术在大庆油田的应用[J].石油学报,2005,26(1):74-78.WANG Demin,CHENG Jiecheng,WU Junzheng,et al.Application of polymer flooding technology in Daqing Oilfield[J].Acta Petrolei Sinica,2005,26(1):74-78.
[11]李兆敏,孙茂盛,林日亿,等.泡沫封堵及选择性分流实验研究[J].石油学报,2007,28(4):115-118.LI Zhaomin,SUN Maosheng,LIN Riyi,et al.Laboratory study on foam plugging and selective divided-flow[J].Acta Petrolei Sinica,2007,28(4):115-118.
[12]SHOKROLLAHI A,GHAZANFARI M H,BADAKHSHAN A.Application of foam floods for enhancing heavy oil recovery through stability analysis and core flood experiments[J].Canadian Journal of Chemical Engineering,2015,92(11):1 975-1 987.
[13]元福卿,王其伟,李宗阳,等.油相对泡沫稳定性的影响规律[J].油气地质与采收率,2015,22(1):118-121.YUAN Fuqing,WANG Qiwei,LI Zongyang,et al.Relationship between oil and foam stability[J].Petroleum Geology and Recovery Efficiency,2015,22(1):118-121.
[14]RAI Y,TAKAHAMA T,SAGARA Y,et al.Microvisual and coreflood studies of foam interactions with a light crude oil[J].SPEReservoir Engineering,1993,8(3):201-206.
[15]ZARGARTALEBI M,KHARRAT R,BARATI N.Enhancement of surfactant flooding performance by the use of silica nanoparticles[J].Fuel,2015,143:21-27.
[16]SINGH R,MOHANTY K K.Synergy between nanoparticles and surfactants in stabilizing foams for oil recovery[J].Energy&Fuels,2015,29(2):467-479.
[17]SINGH R,MOHANTY K K.Foam flow in a layered,heterogeneous porous medium:A visualization study[J].Fuel,2017,197:58-69.
[18]LU Teng,LI Zhaomin,ZHOU Yan.Flow behavior and displacement mechanisms of nanoparticle stabilized foam flooding for enhanced heavy oil recovery[J].Energies,2017,10(4):560.
[19]孙琳,赵凡琪,张芸,等.高温高盐底水油藏氮气泡沫压锥实验研究[J].油气地质与采收率,2017,24(6):97-102.SUN Lin,ZHAO Fanqi,ZHANG Yun,et al.An experimental study of coning control with nitrogen foam in high-temperature and high-salinity bottom water reservoirs[J].Petroleum Geology and Recovery Efficiency,2017,24(6):97-102.
[20]寇永强.坨11区块泡沫驱油的室内研究与现场实践[J].油田化学,2005,22(2):184-187.KOU Yongqiang.Foam flood to enhance oil recovery in block Tuo-11:laboratory study and field practice[J].Oilfield Chemistry,2005,22(2):184-187.
[21]康宵瑜,王维波,汤瑞佳,等.空气泡沫驱油技术在低温特低渗油藏中的应用--以甘谷驿油田唐80井区为例[J].非常规油气,2016,3(3):68-74.KANG Xiaoyu,WANG Weibo,TANG Ruijia,et al.Application of air-foam flooding to low-temperature and ultralow-permeability reservoir-a case study of Tang80 well area in Ganguyi Oilfield[J].Unconventional Oil&Gas,2016,3(3):68-74.
[22]陈玉英,刘子聪,陈清伟,等.百色油田泡沫驱油效果初步分析[J].油田化学,1998,(2):141-145.CHEN Yuying,LIU Zicong,CHEN Qingwei,et al.A preliminary analysis of the field results of foam flood in Baise oil fields[J].Oilfield Chemistry,1998,(2):141-145.
[23]ZHU T,AND Doo,KHATANIAR S.Improving the foam performance for mobility control and improved sweep efficiency in gas flooding[J].Industrial&Engineering Chemistry Research,2004,43(15):4 413-4 421.
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