表面活性剂对长庆超低渗砂岩油藏化学渗吸的影响
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摘要
以长庆油田超低渗储层Y284区块为研究对象,通过静态渗吸、油水界面张力、润湿性以及油水黏度比测量等实验,研究了表面活性剂性能对化学渗吸采收率的影响。结果表明:在超低渗Y284砂岩储层中,阴离子型表面活性剂的渗吸效果最好,并且阴离子亲油基碳链长度的增加可以增强渗吸作用;溶液p H大于两性离子等电点时,甜菜碱型表面活性剂可促进渗吸作用;阳离子表面活性剂不适用于砂岩油藏的化学渗吸采油中;当界面张力处于10-1m N/m数量级时,界面张力下降,渗吸采收率升高,当界面张力处于10-2m N/m数量级时,界面张力上升,渗吸采收率升高;表面活性剂可以改善岩石表面润湿性,增强渗吸作用;给出了油砂静态渗吸的毛管数表达式,润湿相黏度的适当增加或非湿相黏度的降低有利于毛管数的增加,可以增大渗吸采收率。
Taking Y284 Block in the low-permeability reservoir of Changqing Oilfield as the object of the study,with the help of the experiments on imbibition,interfacial tension,wettability and oil-water viscosity ratio,the effect of surfactant performance on chemical imbibition recovery was studied. The achievements show that in ultralow permeability sandstone reservoir,the anionic surfactants have the best imbibition effect,and the increase of the lipophilic group carbon number can enhance the imbibition recovery. When the pH value of the solution is greater than the zwitterionic isoelectric point,betaine surfactants can promote the imbibition. Cationic surfactants are not suitable for chemical imbibition in sandstone reservoirs. The imbibition recovery rises when the interfacial tension decreases at the interfacial tension of 10-1 m N/m level,the imbibition recovery increases when the interfacial tension rises at the interfacial tension of 10-2 m N/m level. Surfactant improves the wettability of rock and enhance the imbibition capability. The expression of the capillary number for the oil sand imbibition of is given. The appropriate increase of wetting phase viscosity or the decrease of non-wetting phase viscosity are favorable for increasing capillary number and increasing the imbibition recovery.
Taking Y284 Block in the low-permeability reservoir of Changqing Oilfield as the object of the study,with the help of the experiments on imbibition,interfacial tension,wettability and oil-water viscosity ratio,the effect of surfactant performance on chemical imbibition recovery was studied. The achievements show that in ultralow permeability sandstone reservoir,the anionic surfactants have the best imbibition effect,and the increase of the lipophilic group carbon number can enhance the imbibition recovery. When the pH value of the solution is greater than the zwitterionic isoelectric point,betaine surfactants can promote the imbibition. Cationic surfactants are not suitable for chemical imbibition in sandstone reservoirs. The imbibition recovery rises when the interfacial tension decreases at the interfacial tension of 10-1 m N/m level,the imbibition recovery increases when the interfacial tension rises at the interfacial tension of 10-2 m N/m level. Surfactant improves the wettability of rock and enhance the imbibition capability. The expression of the capillary number for the oil sand imbibition of is given. The appropriate increase of wetting phase viscosity or the decrease of non-wetting phase viscosity are favorable for increasing capillary number and increasing the imbibition recovery.
引文
1许建红,马丽丽.低渗透裂缝性油藏自发渗吸渗流作用[J].油气地质与采收率,2015,22(3):111-114Xu Jianhong,Ma Lili. Spontaneous imbibition in fractured low permeability reservoir[J]. Petroleum Geology and Oil Efficiency,2015,22(3):111-114
2 彭昱强,韩冬,郭尚平,等.无机盐对亲水砂岩化学渗吸的影响[J].特种油气藏,2009,16(5):71-75Peng Yuqiang,Han Dong,Guo Shangping,et al. Effect of inorganic salt on chemical imbibition behavior of water-wet sandstone[J]. Special Oil&Gas Reservoirs,2009,16(5):71-75
3 周万富,王鑫,卢祥国,等.致密油储层动态渗吸采油效果及其影响因素[J].大庆石油地质与开发,2017,36(3):148-155Zhou Wanfu,Wang Xin,Lu Xiangguo,et al. Effects of the dynamic imbibition recovery and its influencing factors for the tight oil reservoirs[J]. Petroleum Geology&Oilfield Development in Daqing,2017,36(3):148-155
4 韦青,李治平,王香增,等.裂缝性致密砂岩储层渗吸机理及影响因素——以鄂尔多斯盆地吴起地区长8储层为例[J].油气地质与采收率,2016,23(4):102-107Wei Qing,Li Zhiping,Wang Xiangzeng,et al. Mechanism and influence factors of imbibition in fractured tight sandstone reservoir:An example from Chang8 reservoir of Wuqi area in Ordos Basin[J]. Petroleum Geology and Oil Efficiency,2016,23(4):102-107
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6 李爱芬,凡田友,赵琳.裂缝性油藏低渗透岩心自发渗吸实验研究[J].油气地质与采收率,2011,18(5):67-69Li Aifen,Fan Tianyou,Zhao Lin. Experimental study on spontaneous imbibition of low permeability cores in fractured reservoirs[J]. Petroleum Geology and Oil Efficiency,2011,18(5):67-69
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8 孟庆帮,刘慧卿,王敬.天然裂缝性油藏渗吸规律[J].断块油气田,2014,21(3):330-334Meng Qingbang,Liu Huiqing,Wang Jing. Imbibition law of naturally fractured reservoirs[J]. Fault-Block Oil and Gas Field,2014,21(3):330-334
9 王向阳,杨正明,刘学伟,等.致密油藏大模型逆向渗吸的物理模拟实验研究[J].科学技术与工程,2018,18(8):43-48Wang Xiangyang,Yang Zhengming,Liu Xuewei,et al. Physical model experiment of large scale model using countercurrent imbibition in tight oil reservoirs[J]. Science Technology and Engineering,2018,18(8):43-48
10 Washburn E W. The dynamics of capillary flow[J]. Physical Review,1921,17(3):273-283
11 Mirzaeipaiaman A,Masihi M. Scaling equations for oil/gas recovery from fractured porous media by counter-current spontaneous imbibition:From development to application[J]. Energy Fuels,2013,27(8):4662-4676
12 Liang B,Jiang H,Li J,et al. Investigation of oil saturation development behind spontaneous imbibition front using nuclear magnetic resonance(NMR)T2[J]. Energy Fuels,2017,31:473-481
13 张翼,马德胜,朱友益.化学渗吸采油理论与实验新方法[M].北京:科学出版社,2018Zhang Yi,Ma Desheng,Zhu Youyi. New theoretical and experimental methods of chemical imbibition oil recovery[M]. Beijing:Science Press,2018
14 江敏.长庆低渗透油藏渗吸采油体系研究[D].北京:中国地质大学(北京),2016Jiang Min. Study on percolation recovery system of Changqing low permeability reservoir[D]. Beijing:China University of Geosciences(Beijing),2016
15 王业飞,徐怀民,齐自远,等.原油组分对石英表面润湿性的影响与表征方法[J].中国石油大学学报(自然科学版),2012,36(5):155-159Wang Yefei,Xu Huaimin,Qi Ziyuan,et al. Effects of crude fractions on quartz surface wettability and characterization method[J].Journal of China University of Petroleum(Edition of Natural Science),2012,36(5):155-159
16 李英,郝树萱.十二烷基甜菜碱的界面活性及其体系的相态研究[J].化学物理学报,1998,11(3):283-288Li Ying,Hao Shuxuan. Studies on the interfacial activity and phase behavior of dodecyl betaine[J]. Chinese Journal of Chemical Physics,1998,11(3):283-288
17 蔡明隽.十四烷基对二甲苯磺酸钠合成与性能研究[D].长春:吉林大学,2016Cai Mingjun. Synthesis and properties of fourteen alkyl p-xylene sulfonate[D]. Changchun:Jilin University,2016
18 牛丽伟,姜贵璞,卢祥国,等.三元复合体系性能及其对驱油效率影响研究[J].油田化学,2014,31(2):290-294Niu Liwei,Jiang Guipu,Lu Xiangguo,et al. The Performance of ASP compound syetem and its effect on flooding efficiency[J]. Oilfield Chemistry,2014,31(2):290-294
19 Wang D,Liu C,Wu W,et al. Novel surfactants that attain ultralow interfacial tension between oil and high salinity formation water without adding alkali,salts,co-surfactants,alcohols and solvents[J]. Nature,2010,292(5824):629-631
20 朱友益,侯庆锋,简国庆,等.化学复合驱技术研究与应用现状及发展趋势[J].石油勘探与开发,2013,40(1):90-96Zhu Youyi,Hou Qingfeng,Jian Guoqing,et al. Current development and application of chemical combination flooding technique[J]. Petroleum Exploration and Development,2013,40(1):90-96
21 Chen H,Fan H,Zhang Y,et al. Investigations on the driving forces of the fluorocarbon surfactant-assisted spontaneous imbibition using thermogravimetric analysis(TGA)[J]. RSC Advances,2018(8):38196-38203
22 Meng Q,Liu H,Wang J,et al. Effect of wetting-phase viscosity on cocurrent spontaneous imbibition[J]. Energy Fuels,2016,30(2):835-843
23 Rokhforouz M R,Amiri H A A. Pore-level Influence of micro-fracture parameters on visco-capillary behavior of two-phase displacements in porous media[J]. Advances in Water Resources,2018,113(3):260-271
2 彭昱强,韩冬,郭尚平,等.无机盐对亲水砂岩化学渗吸的影响[J].特种油气藏,2009,16(5):71-75Peng Yuqiang,Han Dong,Guo Shangping,et al. Effect of inorganic salt on chemical imbibition behavior of water-wet sandstone[J]. Special Oil&Gas Reservoirs,2009,16(5):71-75
3 周万富,王鑫,卢祥国,等.致密油储层动态渗吸采油效果及其影响因素[J].大庆石油地质与开发,2017,36(3):148-155Zhou Wanfu,Wang Xin,Lu Xiangguo,et al. Effects of the dynamic imbibition recovery and its influencing factors for the tight oil reservoirs[J]. Petroleum Geology&Oilfield Development in Daqing,2017,36(3):148-155
4 韦青,李治平,王香增,等.裂缝性致密砂岩储层渗吸机理及影响因素——以鄂尔多斯盆地吴起地区长8储层为例[J].油气地质与采收率,2016,23(4):102-107Wei Qing,Li Zhiping,Wang Xiangzeng,et al. Mechanism and influence factors of imbibition in fractured tight sandstone reservoir:An example from Chang8 reservoir of Wuqi area in Ordos Basin[J]. Petroleum Geology and Oil Efficiency,2016,23(4):102-107
5 李继山.表面活性剂体系对渗吸过程的影响[D].北京:中国科学院研究生院,2006Li Jishan. Effect of surfactant system on imbibition process[D]. Beijing:Graduate School of Chinese Academy of Sciences,2006
6 李爱芬,凡田友,赵琳.裂缝性油藏低渗透岩心自发渗吸实验研究[J].油气地质与采收率,2011,18(5):67-69Li Aifen,Fan Tianyou,Zhao Lin. Experimental study on spontaneous imbibition of low permeability cores in fractured reservoirs[J]. Petroleum Geology and Oil Efficiency,2011,18(5):67-69
7 高陪.致密砂岩储层渗吸特征实验研究[D].西安:西安石油大学,2016Gao Pei. Experimental study on the imbibition characteristics of tight sandstone reservoirs[D]. Xi'an:Xi'an Petroleum University,2016
8 孟庆帮,刘慧卿,王敬.天然裂缝性油藏渗吸规律[J].断块油气田,2014,21(3):330-334Meng Qingbang,Liu Huiqing,Wang Jing. Imbibition law of naturally fractured reservoirs[J]. Fault-Block Oil and Gas Field,2014,21(3):330-334
9 王向阳,杨正明,刘学伟,等.致密油藏大模型逆向渗吸的物理模拟实验研究[J].科学技术与工程,2018,18(8):43-48Wang Xiangyang,Yang Zhengming,Liu Xuewei,et al. Physical model experiment of large scale model using countercurrent imbibition in tight oil reservoirs[J]. Science Technology and Engineering,2018,18(8):43-48
10 Washburn E W. The dynamics of capillary flow[J]. Physical Review,1921,17(3):273-283
11 Mirzaeipaiaman A,Masihi M. Scaling equations for oil/gas recovery from fractured porous media by counter-current spontaneous imbibition:From development to application[J]. Energy Fuels,2013,27(8):4662-4676
12 Liang B,Jiang H,Li J,et al. Investigation of oil saturation development behind spontaneous imbibition front using nuclear magnetic resonance(NMR)T2[J]. Energy Fuels,2017,31:473-481
13 张翼,马德胜,朱友益.化学渗吸采油理论与实验新方法[M].北京:科学出版社,2018Zhang Yi,Ma Desheng,Zhu Youyi. New theoretical and experimental methods of chemical imbibition oil recovery[M]. Beijing:Science Press,2018
14 江敏.长庆低渗透油藏渗吸采油体系研究[D].北京:中国地质大学(北京),2016Jiang Min. Study on percolation recovery system of Changqing low permeability reservoir[D]. Beijing:China University of Geosciences(Beijing),2016
15 王业飞,徐怀民,齐自远,等.原油组分对石英表面润湿性的影响与表征方法[J].中国石油大学学报(自然科学版),2012,36(5):155-159Wang Yefei,Xu Huaimin,Qi Ziyuan,et al. Effects of crude fractions on quartz surface wettability and characterization method[J].Journal of China University of Petroleum(Edition of Natural Science),2012,36(5):155-159
16 李英,郝树萱.十二烷基甜菜碱的界面活性及其体系的相态研究[J].化学物理学报,1998,11(3):283-288Li Ying,Hao Shuxuan. Studies on the interfacial activity and phase behavior of dodecyl betaine[J]. Chinese Journal of Chemical Physics,1998,11(3):283-288
17 蔡明隽.十四烷基对二甲苯磺酸钠合成与性能研究[D].长春:吉林大学,2016Cai Mingjun. Synthesis and properties of fourteen alkyl p-xylene sulfonate[D]. Changchun:Jilin University,2016
18 牛丽伟,姜贵璞,卢祥国,等.三元复合体系性能及其对驱油效率影响研究[J].油田化学,2014,31(2):290-294Niu Liwei,Jiang Guipu,Lu Xiangguo,et al. The Performance of ASP compound syetem and its effect on flooding efficiency[J]. Oilfield Chemistry,2014,31(2):290-294
19 Wang D,Liu C,Wu W,et al. Novel surfactants that attain ultralow interfacial tension between oil and high salinity formation water without adding alkali,salts,co-surfactants,alcohols and solvents[J]. Nature,2010,292(5824):629-631
20 朱友益,侯庆锋,简国庆,等.化学复合驱技术研究与应用现状及发展趋势[J].石油勘探与开发,2013,40(1):90-96Zhu Youyi,Hou Qingfeng,Jian Guoqing,et al. Current development and application of chemical combination flooding technique[J]. Petroleum Exploration and Development,2013,40(1):90-96
21 Chen H,Fan H,Zhang Y,et al. Investigations on the driving forces of the fluorocarbon surfactant-assisted spontaneous imbibition using thermogravimetric analysis(TGA)[J]. RSC Advances,2018(8):38196-38203
22 Meng Q,Liu H,Wang J,et al. Effect of wetting-phase viscosity on cocurrent spontaneous imbibition[J]. Energy Fuels,2016,30(2):835-843
23 Rokhforouz M R,Amiri H A A. Pore-level Influence of micro-fracture parameters on visco-capillary behavior of two-phase displacements in porous media[J]. Advances in Water Resources,2018,113(3):260-271