驱油用两性离子型双子表面活性剂的合成及应用
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摘要
针对低渗油藏水驱及常规表面活性剂驱开发效果较差的问题,通过实验研制了一种新的两性离子型双子表面活性剂LSN-104,并在室内评价了其界面活性、耐温性能、抗盐性能、润湿性能以及驱油效果。性能评价结果表明:LSN-104具有良好的界面活性以及耐温抗盐性能,当LSN-104质量分数为0.5%时,在温度为120℃或NaCl质量浓度为60 g/L或CaCl_2质量浓度为5 g/L的条件下,界面张力仍能维持在10~(-3)mN/m数量级;LSN-104的加入能明显减小石蜡片表面的接触角,使亲油性表面转变为亲水性,具有良好的润湿反转能力;注入0.5 PV质量分数为0.5%的LSN-104溶液,能使低渗岩心水驱后的采收率提高15.65百分点。现场应用结果表明,注入表面活性剂LSN-104后,采油井见效率达100%,各采油井均呈现出产油量上升、含水率下降的趋势,增油效果显著,取得了明显的施工效果。
In view of the poor development effect of water flooding and conventional surfactant flooding in low permeability reservoirs, a new type of amphoteric ion gemini surfactant LSN-104 was developed by experiment, and its interfacial activity,temperature resistance, salt resistance, wettability and oil displacement effect were evaluated in the laboratory. The results show that the zwitterionic gemini surfactants have good interfacial activity and good temperature resistance and salt resistance. When the amount of LSN-104 is 0.5%, the interfacial tension can remain within the range of 10~(-3) mN/m at the temperature of 120 ℃, the concentration of 60 g/L NaCl and 5 g/L CaCl_2. The addition of surfactant can reduce the contact angle of the surface of the paraffin surface obviously, making the oil-based surface change to hydrophilic, and have good wetting reversal ability. When 0.5 PV of 0.5% LSN-104 is injected, the recovery rate of the low permeability rock after water flooding can be increased by 15.65%. The results of field construction show that the efficiency of production well is 100% after the injection of gemini surfactants. All production wells show the trend of increasing oil production and water cut. The cumulative effect of oil increase is remarkable, and obvious construction effect has been achieved.
In view of the poor development effect of water flooding and conventional surfactant flooding in low permeability reservoirs, a new type of amphoteric ion gemini surfactant LSN-104 was developed by experiment, and its interfacial activity,temperature resistance, salt resistance, wettability and oil displacement effect were evaluated in the laboratory. The results show that the zwitterionic gemini surfactants have good interfacial activity and good temperature resistance and salt resistance. When the amount of LSN-104 is 0.5%, the interfacial tension can remain within the range of 10~(-3) mN/m at the temperature of 120 ℃, the concentration of 60 g/L NaCl and 5 g/L CaCl_2. The addition of surfactant can reduce the contact angle of the surface of the paraffin surface obviously, making the oil-based surface change to hydrophilic, and have good wetting reversal ability. When 0.5 PV of 0.5% LSN-104 is injected, the recovery rate of the low permeability rock after water flooding can be increased by 15.65%. The results of field construction show that the efficiency of production well is 100% after the injection of gemini surfactants. All production wells show the trend of increasing oil production and water cut. The cumulative effect of oil increase is remarkable, and obvious construction effect has been achieved.
引文
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[2]党海龙,王小锋,段伟,等.鄂尔多斯盆地裂缝性低渗透油藏渗吸驱油研究[J].断块油气田,2017,24(5):687-690.
[3]杜庆龙.长期注水开发砂岩油田储层渗透率变化规律及微观机理[J].石油学报,2016,37(9):1159-1164.
[4]范成成.阴离子表面活性剂与无机盐相互作用的理论研究[D].青岛:中国石油大学(华东),2014.
[5]卫龙,沈一丁,严海南,等.高性能耐温耐盐阳/阴离子表面活性剂复合型驱油体系性能的研究[J].石油化工,2015,44(2):206-211.
[6]赵涛涛,宫厚健,徐桂英,等.阴离子表面活性剂在水溶液中的耐盐机理[J].油田化学,2010,27(1):112-118.
[7]刘霜,唐善法,刘湘,等.阴离子双子表面活性剂性能研究[J].断块油气田,2011,18(1):110-112.
[8]王佳.一种双子表面活性剂的合成及在采油中的应用[J].科学技术与工程,2012,12(12):2956-2958.
[9]胡小冬,熊玉娟,刘霜,等.阴离子双子表面活性剂的油水界面张力[J].断块油气田,2012,19(1):130-132.
[10]郭宇.耐温抗盐型复合表面活性剂驱油体系的合成及应用[J].断块油气田,2018,25(2):258-261.
[11]胡小冬,熊玉娟,欧阳向南,等.阴离子双子表面活性剂驱油体系研究[J].石油与天然气化工,2012,41(1):79-81.
[12]武俊文,熊春明,雷群,等.阳离子型双子表面活性剂在制备耐高温、高矿化度泡排剂中的应用[J].石油钻采工艺,2016,38(2):256-259.
[13]任海晶,李移乐,王晓晖,等.两性双子表面活性剂驱油剂提高原油采收率研究[J].化工技术与开发,2016,45(3):1-3.
[14]张珍仙.非对称结构双子型两性离子表面活性剂的研究[D].上海:上海大学,2012.
[15]张玉娟.双季铵盐双磺酸盐型表面活性剂的合成及应用[D].西安:西北大学,2016.
[16]杨浩珑,向祖平,李龙,等.CO2泡沫双子表面活性剂清洁压裂液研究与试验[J].石油钻探技术,2018,46(2):92-97.
[17]王友启.高钙镁油藏烷醇酰胺类表面活性剂及其复配体系驱油性能研究[J].石油钻探技术,2018,46(3):98-102.
[18]牟洪亮,丁伟,刘向斌,等.两性双子表面活性剂合成研究进展[J].日用化学工业,2017,47(8):468-475.
[19]赵田红,董阳阳,彭国峰,等.两性双子表面活性剂的合成及性能评价[J].应用化工,2011,40(7):1219-1221.
[20]韩世岩,高福刚,方桂珍,等.一种新颖的松香酰基甘氨酸型两性双子表面活性剂的合成及性能分析[J].现代化工,2011,31(5):39-41.
[21]高南,李国荣,陈旭东.双子表面活性剂的合成及应用研究进展[J].日用化学工业,2014,44(11):644-651.
[22]王增宝.耐温抗盐表面活性剂驱油体系研究[D].青岛:中国石油大学(华东),2010.
[23]韩玉贵.耐温抗盐驱油用化学剂研究进展[J].西南石油大学学报(自然科学版),2011,33(3):149-153.