高温油藏暂堵剂的制备与性能研究
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摘要
针对现有油田暂堵剂耐盐性差、在高温地层条件下凝胶时间较短的问题,设计研发了以丙烯酰胺(AM)、丙烯酸(AA)、功能单体2-丙烯酰胺-2-甲基丙磺酸(AMPS)为主要原料,N,N-亚甲基双丙烯酰胺(BIS)为交联剂,高温引发剂过氧化二异丙苯为引发体系,利用溶液聚合法合成了一种耐温耐盐性化学胶塞暂堵剂.研究了引发剂加量、交联剂加量、固含量以及增韧剂加量对聚合物凝胶的成胶时间、溶胀度及压缩强度的影响.结果表明:该体系的凝胶时间大于2,h,在矿化度为2.2×105,mg/L的模拟地层水中溶胀度可以达到9,g/g,压缩量为80%,条件下强度大于0.4,MPa,在330,℃下没有明显的热分解,适用于高温高盐油藏的堵漏工作.
To improve poor salt-tolerance and short gelation time at high-temperature of plugging agents in oilfield,a new salt-toleration and temperature-resistant temporary plugging agent was synthesized by solution copolymerization of acrylamide(AM),acrylic acid(AA)and 2-acrylamido-2-methyl-propane sulfonic acid(AMPS) with initiator dicumyl peroxide(DCP)and the crosslinking agent N,N-methylenebbisacrylamide.The effects of reactant contents on polymer gel's gelation time,swelling degree and compressive strength were studied,including the solid content and contents of the initiator,crosslinking agent,and thickening agent.The results show that the gelation time of this system is more than 2,h,the swelling degree can reach 9,g/g in the simulated formation water with the mineralization degree of 2.2×105,mg/L and its strength is more than 0.4,MPa under the compression rate of 80%,.Thermal decomposition was not observed at the temperature of 330,℃.These new polymer materials can be used in plugging work under the condition of high-temperature and salt reservoir.
To improve poor salt-tolerance and short gelation time at high-temperature of plugging agents in oilfield,a new salt-toleration and temperature-resistant temporary plugging agent was synthesized by solution copolymerization of acrylamide(AM),acrylic acid(AA)and 2-acrylamido-2-methyl-propane sulfonic acid(AMPS) with initiator dicumyl peroxide(DCP)and the crosslinking agent N,N-methylenebbisacrylamide.The effects of reactant contents on polymer gel's gelation time,swelling degree and compressive strength were studied,including the solid content and contents of the initiator,crosslinking agent,and thickening agent.The results show that the gelation time of this system is more than 2,h,the swelling degree can reach 9,g/g in the simulated formation water with the mineralization degree of 2.2×105,mg/L and its strength is more than 0.4,MPa under the compression rate of 80%,.Thermal decomposition was not observed at the temperature of 330,℃.These new polymer materials can be used in plugging work under the condition of high-temperature and salt reservoir.
引文
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[3]吴轩宇,任晓娟,李盼,等.用于裂缝性地层的体膨颗粒钻井液堵漏剂TP-2的制备与性能研究[J].油田化学,2016,33(2):191-194.Wu Xuanyu,Ren Xiaojuan,Li Pan,et al.Preparation and properties of body expansion granulation drilling fluid plugging agent TP-2 for fractured strata[J].Oilfield Chemistr,2016,33(2):191-194(in Chinese).
[4]Yu Z,Li Y,Sha O,et al.Synthesis and properties of amphiprotic polyacrylamide microspheres as water shutoff and profile control[J].Journal of Applied Polymer Science,2016,133(17):1-9.
[5]王中华.聚合物凝胶堵漏剂的研究与应用进展[J].精细与专用化学品,2011,19(4):16-20.Wang Zhonghua.Research and application progress of the polymer gel plugging agent[J].Fine and Specialty Chemicals,2011,19(4):16-20(in Chinese).
[6]于澄.聚合物凝胶堵漏技术研究[D].北京:中国地质大学工程学院,2016.Yu Cheng.Polymer Gel Plugging Technology Research[D].Beijing:Faculty of Engineering,China University of Geosciences,2016(in Chinese).
[7]Kant K.Study of the gelation and rheological behavior of carboxymethyl cellulose-polyacrylamide graft copolymer hydrogel[J].Journal of Dispersion Science&Technology,2015,36(6):877-884.
[8]Singh R,Mahto V.Study of the polymer concentration and polymer/crosslinker ratio effect on gelation time of a novel grafted polymer gel for water shutoff using a central composite design method[J].Polymers for Advanced Technologies,2016,27(2):204-212.
[9]高玉军.耐高温耐盐聚丙烯酰胺类调堵剂的研究[D].武汉:武汉工程大学材料科学与工程学院,2013.Gao Yujun.Study on High Temperature and Salt Tolerance Polyacrylamide Plugging Agents[D].Wuhan:School of Materials Science and Engineering,Wuhan Institute of Technology,2013(in Chinese).
[10]Moghadam A M.Gelation time of hexamethylenetetramine polymer gels used in water shutoff treatment[J].Journal of Petroleum Science and Technology,2012,2(2):3-11.
[11]Majid R,Mohsen V S,Farhad S,et al.Investigation of rheological properties of polyacrylamide/chromium triacetate hydrogels performed for water shutoff treatment in oil reservoirs[J].Journal of Dispersion Science&Technology,2014,35(1):56-63.
[12]Zhang L,Pu C,Zheng L,et al.Synthesis and performance evaluation of a new kind of gel used as water shutoff agent[J].Journal of Petroleum Exploration&Production Technology,2016,6(3):433-440.
[13]王欢,张萍,陈佑宁.氧化石墨烯/聚海藻酸钠丙烯酸凝胶的制备及溶胀性能研究[J].精细石油化工,2017,34(1):34-39.Wang Huan,Zhang Ping,Chen Youning.Preparation and swelling properties of grapheme oxide/poly(sodium alginate-co-acrylic acid)absorbent hydrogel nanocomposites[J].Speciality Petrochemicals,2017,34(1):34-39(in Chinese).
[14]柳明珠,曹丽歆,马松梅,等.耐盐性高吸水树酯的制备及性能[J].高分子材料科学与工程,2005,21(1):280-283.Liu Mingzhu,Cao Lixin,Ma Songmei,et al.Preparation of superabsorbent resistant to saline solution and study on its properties[J].Polymer Materials Science&Engineering,2005,21(1):280-283(in Chinese).