阳离子聚合物铬冻胶的研制与性能评价
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摘要
针对高强度铬冻胶堵剂普遍成胶过快的问题,通过优选阳离子聚合物并利用铝溶胶对配方进行优化,制得适用于深部调剖的阳离子聚合物有机铬冻胶堵剂,并对其性能进行了评价。结果表明,对于丙烯酰胺(AM)/丙烯酰氧乙基三甲基氯化铵(DAC)二元共聚物有机铬冻胶,其阳离子度越低,成胶时间越长;铝溶胶可以有效延缓阳离子聚合物有机铬冻胶成胶时间,并能提高其强度和长期稳定性;阳离子聚合物有机铬冻胶体系最优配方为0.8%聚合物Y5(阳离子度5%)+0.3%醋酸铬+0.2%铝溶胶,90℃下的成胶时间为55 h,成胶后弹性模量为16.6 Pa,属于高强度冻胶;该冻胶堵剂注入性好,同时具有较好的抗剪切性和耐温抗盐性,封堵率可达96%以上,满足深部调剖对堵剂的要求。图4表8参18
In order to deal with the issue that high strength chromium gel always had high crosslinking speed,the formula of plugging agent was optimized by selecting cationic polymer and using of alumina sol. The chromium gel plugging agent suitable for deep profile control was developed and its performance was evaluated. The results showed that for acrylamide(AM)/acryloyloxyethyltrimethylammonium chloride(DAC)binary copolymer organic chromium gel,the lower the cationic degree,the longer the gelation time was. Alumina sol could effectively delay the gelation time of cationic polymer chromium gel and improve its strength and long-term stability. The optimum formula of chromium gel system was 0.8% polymer Y5 with 5% cationic degree,0.3% chromium acetate and 0.2% aluminum sol. The gelation time was 55 h at 90℃ and the elastic modulus was 16.6 Pa,which belonged to high-strength gel. The plugging agent had good injection ability and strong shear resistance. Meanwhile,it had strong temperature and salt resistance,and its blocking rate could reach more than 96%. This plugging agent had long gelation time and strong plugging performance,which could satisfy the requirements of deep profile control.
In order to deal with the issue that high strength chromium gel always had high crosslinking speed,the formula of plugging agent was optimized by selecting cationic polymer and using of alumina sol. The chromium gel plugging agent suitable for deep profile control was developed and its performance was evaluated. The results showed that for acrylamide(AM)/acryloyloxyethyltrimethylammonium chloride(DAC)binary copolymer organic chromium gel,the lower the cationic degree,the longer the gelation time was. Alumina sol could effectively delay the gelation time of cationic polymer chromium gel and improve its strength and long-term stability. The optimum formula of chromium gel system was 0.8% polymer Y5 with 5% cationic degree,0.3% chromium acetate and 0.2% aluminum sol. The gelation time was 55 h at 90℃ and the elastic modulus was 16.6 Pa,which belonged to high-strength gel. The plugging agent had good injection ability and strong shear resistance. Meanwhile,it had strong temperature and salt resistance,and its blocking rate could reach more than 96%. This plugging agent had long gelation time and strong plugging performance,which could satisfy the requirements of deep profile control.
引文
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[12]何曼如,王江波,李洛锋,等.延缓交联聚合物深度调驱技术在靖安油田长6油藏的应用[J].中国西部科技,2011,10(18):37-40.
[13]曹广胜,王培伦,周芷仪,等.缓冲法对铬体系调剖剂长期成胶效果评价[J].当代化工,2018,47(8):1725-1728.
[14]王斌,王栋,李补鱼.一种深部调剖用聚合物/有机铬冻胶体系[J].油田化学,1999,16(1):24-26.
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[17]叶波,熊炜,徐进,等.深部调剖用延迟交联体系研究[J].钻采工艺,2005,28(3):104-106.
[18] MAERKER J M. Shear degradation of partially hydrolyzed polyacrylamide solutions[J]. Soc Pet Eng J,1975,15(4):311-322.
[2]李玉飞.有机铬的合成及延缓交联性能研究[D].黑龙江:东北石油大学,2015:3-4.
[3]周林然,卢渊,伊向艺.聚合物冻胶类堵剂在油田堵水中的应用[J].内蒙古石油化工,2005,15(10):82-84.
[4]刘安昌,郭庆红.铬离子交联聚丙烯酰胺冻胶堵水剂[J].化工科技,1999,7(l):35-37.
[5]安显荣,刘锐.有机铬冻胶调剖技术在朝阳沟油田的应用[J].大庆石油地质与开发,2004,23(6):76-77.
[6]戴彩丽,王业飞,赵福麟.缓交联铬冻胶体系影响因素分析[J].石油大学学报,2002,26(6):56-59.
[7]熊春明,唐孝芬.国内外堵水调剖技术最新进展及发展趋势[J].石油勘探与开发,2007,34(1):83-88.
[8]周高宁,李柏林,牛瑞霞.延迟交联调剖技术概况[J].广州化工,2006,34(1):21-23.
[9]高志勇,邹小萍,于永生,等.深部调剖高效延缓交联剂的研究与评价[J].石油钻采工艺,2002,24(5):59-62.
[10]刘文静,贾寒,曹金园,等.一种延迟交联铬冻胶的研制及性能评价[J].油田化学,2016,33(2):235-239.
[11]戴彩丽,周洪涛,张贵才.影响酸性铬冻胶成冻因素的研究[J].油田化学,2002,19(1):29-32.
[12]何曼如,王江波,李洛锋,等.延缓交联聚合物深度调驱技术在靖安油田长6油藏的应用[J].中国西部科技,2011,10(18):37-40.
[13]曹广胜,王培伦,周芷仪,等.缓冲法对铬体系调剖剂长期成胶效果评价[J].当代化工,2018,47(8):1725-1728.
[14]王斌,王栋,李补鱼.一种深部调剖用聚合物/有机铬冻胶体系[J].油田化学,1999,16(1):24-26.
[15] SWIECINSKI F,REED P. The thermal stability of polyacrylamides in EOR applications[C].//SPE Improved Oil Rocovery Conference. Tulsa,Oklahoma,USA,2016:1-17.
[16]赵群.冻胶类调剖剂性能评价方法及适用条件研究[D].黑龙江:大庆石油学院,2004:4-23.
[17]叶波,熊炜,徐进,等.深部调剖用延迟交联体系研究[J].钻采工艺,2005,28(3):104-106.
[18] MAERKER J M. Shear degradation of partially hydrolyzed polyacrylamide solutions[J]. Soc Pet Eng J,1975,15(4):311-322.