长效抗剪切聚合物驱油剂的合成及性能
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摘要
为了提升驱油用聚合物在苛刻油藏环境中的耐温与抗盐性,设计合成了一种以多元胺-丙烯酸甲酯为聚合前体,具有超支化结构的聚酰胺-胺类单体,并在此基础上合成了一种长效抗剪切聚合物(LSRP)。考查了聚合单体浓度、引发温度、聚合时间、引发剂组成和加量及水解度等因素对LSRP溶液黏度的影响,采用FTIR和1HNMR表征了单体及聚合物结构,对聚合物增黏、抗剪切、抗盐、注入性及驱油性能进行了评价。结果表明:聚合物LSRP具有较好的增黏能力、抗剪切性和稳定性,当原油黏度70～300 m Pa·s时,室内驱油实验采收率较水驱增加20%以上,矿场试验注入后期压力平稳上升。
In order to improve the temperature resistance and salt resistance of polymer used in oil displacement in harsh reservoir environment,a kind of polyamide-amine monomer with hyperbranched structure was designed and synthesized using polyamine-methyl acrylate as polymer precursor,and a long-term shear resistant polymer( LSRP) was synthesized on this basis. The effects of monomer concentration,initiation temperature,polymerization time,the composition and dosage of initiator and hydrolysis degree on the viscosity of LSRP solution were investigated. The structures of the monomer and polymer were characterized by FTIR and 1H NMR. The viscosity,shear resistance,salt resistance,injectivity and oil displacement properties of the polymer were evaluated. The results show that the polymer LSRP has good viscosity increasing ability,shear resistance and salt resistance. When the viscosity of crude oil is 70 ～ 300 m Pa. s,the oil recovery of laboratory flooding experiment is increased by more than 20% compared with water flooding,and the pressure rises steadily in the late injection stage of field test.
In order to improve the temperature resistance and salt resistance of polymer used in oil displacement in harsh reservoir environment,a kind of polyamide-amine monomer with hyperbranched structure was designed and synthesized using polyamine-methyl acrylate as polymer precursor,and a long-term shear resistant polymer( LSRP) was synthesized on this basis. The effects of monomer concentration,initiation temperature,polymerization time,the composition and dosage of initiator and hydrolysis degree on the viscosity of LSRP solution were investigated. The structures of the monomer and polymer were characterized by FTIR and 1H NMR. The viscosity,shear resistance,salt resistance,injectivity and oil displacement properties of the polymer were evaluated. The results show that the polymer LSRP has good viscosity increasing ability,shear resistance and salt resistance. When the viscosity of crude oil is 70 ～ 300 m Pa. s,the oil recovery of laboratory flooding experiment is increased by more than 20% compared with water flooding,and the pressure rises steadily in the late injection stage of field test.
引文
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[19]薛新生,张健,舒政,等.剪切方式对疏水缔合聚合物溶液性能的影响[J].油气地质与采收率,2013,20(1):59-62.XUE Xinsheng,ZHANG Jian,SHU Zheng,et al. Study on effects of shear-mode on properties of hydrophobic associating polymer solution[J]. Petroleum Geology and Recovery Efficiency,2013,20(1):59-62.
[2] WEVER D,PICCHIONI F,BROEKHUIS A A. Polymers for enhanced oil recovery:a paradigm for structure-property relationship in aqueous solution[J]. Progress in Polymer Science,2011,36(11):1558-1628.
[3]谢晓庆,冯国智,刘立伟,等.海上油田聚合物驱后提高采收率技术[J].油气地质与采收率,2015,22(1):93-97.XIE Xiaoqing,FENG Guozhi,LIU Liwei,et al. Study on enhanced oil recovery technology after polymer flooding in offshore oilfield[J]. Petroleum Geology and Recovery Efficiency,2015,22(1):93-97.
[4]张怀平,许凯,曹现福,等.疏水缔合水溶性聚合物聚合方法的研究进展[J].石油化工,2006,35(7):695-700.ZHANG Huaiping,XU Kai,CAO Xianfu,et al. Progresson research for preparation of water-soluble hydrophobic associating polymer[J]. Petrochemical Technology,2006,35(7):695-700.
[5]冯茹森,王用良,郭拥军,等. AM/Na AA/MJ-16三元疏水缔合共聚物的光引发聚合研究[J].油田化学,2011,28(3):254-258.FENG Rusen,WANG Yongliang,GUO Yongjun,et al.Study on AM/Na AA/MJ-16 ternary hydrophobically associating copolymers by photoinitiation polymerization[J].Oilfield Chemistry,2011,28(3):254-258.
[6]郑性能,叶仲斌,叶正荣,等.树枝状分子驱油剂的合成和评价[J].新疆石油地质,2009,30(5):637-640.ZHENG Xingneng,YE Zhongbin,YE Zhengrong,et al.Synthesis of oil-displacing agent with dendritic molecules and its evaluation[J]. Xinjiang Petroleum Geology,2009,30(5):637-640.
[7]孙全力,王爱蓉,张军,等.疏水缔合聚合物APP4流变性能实验研究[J].成都理工大学学报(自然科学版),2012,39(1):104-106.SUN Quanli,WANG Airong,ZHANG Jun,et al. Rheological properties of hydrophobic associative polymer APP4[J]. Journal of Chengdu University of Technology(Science&Technology Edition),2012,39(1):104-106.
[8] LAI Nanjun,DONG Wan,YE Zhongbin,et al. A watersoluble acrylamide hydrophobically associating polymer:synthesis,characterization,and properties as EOR chemical[J]. Journal of Applied Polymer Science,2013,129(4):1888-1896.
[9]付美龙,刘传宗,张伟,等.一种新型疏水缔合聚合物的合成及性能评价[J].西安石油大学学报(自然科学版),2013,28(5):92-95.FU Meilong,LIU Chuanzong,ZHANG Wei,et al. Synthesis and performance evaluation of a new hydrophobic associating polymer[J]. Journal of Xi'an Shiyou University(Natural Science Edition),2013,28(5):92-95.
[10]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.HAN Yugui. Chemicals in heat tolerate and salt resistant flooding[J]. Journal of Southwest Petroleum University(Science&Technology Edition),2011,33(3):149-153.
[11]彭晓春,彭小宏,赵建青,等.改性两性聚酰胺-胺阳离子树状聚合物的制备、表征及絮凝脱水性能的研究[J].石油化工,2005,34(10):986-989.PENG Xiaochun,PENG Xiaohong,ZHAO Jianqing,et al.Preparation and characterization of novel polyamideaminemodified cationic dendrmier and its flocculating and dewatering performances[J]. Petrochemical Technology,2005,34(10):986-989.
[12]董雯.新型耐温抗盐聚合物增黏剂的合成及性能评价[J].西安石油大学学报(自然科学版),2014,29(5):75-79.DONG Wen. Synthesis and performance evaluation of a new polymer thickener resisting to high temperature and salt[J]. Journal of Xi'an Shiyou University(Natural Science Edition),2014,29(5):75-79.
[13]蒋文超,叶仲斌,苟绍华,等.含咪唑结构丙烯酰胺聚合物驱油剂的合成[J].西南石油大学学报(自然科学版),2014,36(6):143-149.JIANG Wenchao,YE Zhongbin,GOU Shaohua,et al. Synthesis of imidazoline modified acrylamide-based copolymer as EOR chemical[J]. Journal of Southwest Petroleum University(Science&Technology Edition),2014,36(6):143-149.
[14]CAMAIL M,MARGAILLAN A,MARTIN I,et al. Synthesis of N-alkyl-and N-arylalkylacrylamides and micellar copolymerization with acrylamide[J]. European Polymer J,2000,36(3):1853-1863.
[15]钟传蓉,黄荣华,代华.水溶性疏水缔合聚合物单体的合成[J].化学世界,2004(8):437-441.ZHONG Chuanrong,HUANG Ronghua,DAI Hua. Synthesis of monomers of water-soluble hydrophobically associating polymers[J]. Chemical World,2004(8):437-441.
[16]中国石油天然气总公司.驱油用丙烯酰胺类聚合物性能测定:SY/T 5862—93[S].北京:石油工业出版社,1993.
[17]施雷庭,贾天泽,叶仲斌,等.剪切作用对疏水缔合聚合物溶液分子聚集行为的影响[J].油气地质与采收率,2011,18(2):49-51.SHI Leiting,JIA Tianze,YE Zhongbin,et al. Shearing effect on the assembling behavior of hydrophobic associative polymer solution[J]. Petroleum Geology and Recovery Efficiency,2011,18(2):49-51.
[18]胡科,张健,陈文娟,等.采出液中聚合物浓度准确测定方法及应用[J].油田化学,2017,34(2):356-360.HU Ke,ZHANG Jian,CHEN Wenjuan,et al. Method for accurate determination of polymer concentration in flooding-polymer produced fluid and its application[J]. Oilfield Chemistry,2017,34(2):356-360.
[19]薛新生,张健,舒政,等.剪切方式对疏水缔合聚合物溶液性能的影响[J].油气地质与采收率,2013,20(1):59-62.XUE Xinsheng,ZHANG Jian,SHU Zheng,et al. Study on effects of shear-mode on properties of hydrophobic associating polymer solution[J]. Petroleum Geology and Recovery Efficiency,2013,20(1):59-62.