本体聚合法制备低分子量水基钻井液降粘剂
|
摘要
采用本体聚合的方法,以苯乙烯(St)和马来酸酐(MA)为原料制备苯乙烯-马来酸酐聚合物(SMA),采用氯磺酸进一步磺化后得到低分子量的水基钻井液降粘剂磺化苯乙烯-马来酸酐(SSMA)。研究了单体配比、聚合温度、引发剂用量以及链转移剂用量对产物降粘性能的影响。结果表明,SMA的最佳合成条件为:在St与MA的摩尔比为1∶1的条件下,聚合温度为65℃,引发剂的用量为单体总质量的1.5%,链转移剂的用量为单体总质量的4%,经磺化改性制得的SSMA降粘剂能显著降低钻井液的粘度。利用红外光谱仪、凝胶色谱仪和差热分析仪对聚合物进行表征,可知所合成的聚合物结构与设计结构基本一致,重均分子量在3 000~5 000之间,分子量较低;通过热重分析曲线可知,在289℃左右失重保持在90%以上,聚合物热稳定性能良好。
Styrene-maleic anhydride polymer( SMA) was prepared by bulk polymerization from styrene( St) and maleic anhydride( MA),then sulfonated to obtain styrene-maleic anhydride( SSMA) by used as water-based drilling fluid viscosity reducing agent. The effects of monomer ratio,polymerization temperature,initiator content,and chain transfer agent content on the viscosity reduction of the product were studied. The results showed that the optimum synthesis conditions of SMA were as follows: molar ratio of St and MA was 1 ∶ 1,the polymerization temperature was 65 ℃,the content of initiator was 1. 5%( total weight of monomer),and the content of chain transfer agent was 4%( total weight of monomer). Viscosity reducer SSMA obtained by sulfonation can significantly reduce the viscosity of the drilling fluid. The polymers were characterized by infrared spectroscopy,gel chromatography,and differential thermal analysis.The polymer structure was consistent with the design structure and had low molecular weigh the weight average molecular weight is 3 000 ~ 5 000. The thermogravimetric analysis curve showed that the weight loss at 289 ℃ was maintained at 90% or more,the polymer exhibited good thermal stability.
Styrene-maleic anhydride polymer( SMA) was prepared by bulk polymerization from styrene( St) and maleic anhydride( MA),then sulfonated to obtain styrene-maleic anhydride( SSMA) by used as water-based drilling fluid viscosity reducing agent. The effects of monomer ratio,polymerization temperature,initiator content,and chain transfer agent content on the viscosity reduction of the product were studied. The results showed that the optimum synthesis conditions of SMA were as follows: molar ratio of St and MA was 1 ∶ 1,the polymerization temperature was 65 ℃,the content of initiator was 1. 5%( total weight of monomer),and the content of chain transfer agent was 4%( total weight of monomer). Viscosity reducer SSMA obtained by sulfonation can significantly reduce the viscosity of the drilling fluid. The polymers were characterized by infrared spectroscopy,gel chromatography,and differential thermal analysis.The polymer structure was consistent with the design structure and had low molecular weigh the weight average molecular weight is 3 000 ~ 5 000. The thermogravimetric analysis curve showed that the weight loss at 289 ℃ was maintained at 90% or more,the polymer exhibited good thermal stability.
引文
[1]Mahto V,Sharma V P.Rheological study of a water based oil well drilling fluid[J].Journal of Petroleum Science&Engineering,2004,45(1/2):123-128.
[2]鄢捷年.钻井液工艺学[M].东营:石油大学出版社,2001:127-148,222-235.
[3]曹书金,王雅新,卢景峰,等.耐温抗盐降粘剂的研制及评价[J].精细石油化工进展,2012,13(7):31-34.
[4]樊泽霞,王杰祥,孙明波,等.磺化苯乙烯-水解马来酸酐共聚物降粘剂SSHMA的研制[J].油田化学,2005(3):195-198.
[5]周玲.磺化苯乙烯-马来酸酐共聚物的合成及其性能研究[D].南京:南京理工大学,2007.
[6]何铁林.水处理化学品手册[M].北京:化学工业出版社,2000.
[7]边靖生,李波.国内钻井液用降粘剂的研究应用进展[J].广东化工,2013(1):69-70.
[8]邱广明.苯乙烯和马来酸酐共聚物的合成及其功能化膜和微球的研究[D].杭州:浙江大学,2006.
[9]张永明,朱红,王芳辉,等.改性纳米Si O2/磺化聚苯乙烯-马来酸酐降粘剂的研究[J].功能材料,2009,40(3):498-500.
[10]罗跃,胡红亮,王志龙,等.钻井液用降黏剂磺化苯乙烯-马来酸酐聚合物的合成与评价[J].精细石油化工进展,2011,12(1):13-15.
[11]中华人民共和国能源部.SY/T 5243—91水基钻井液用降粘剂评价程序[S].北京:石油工业出版社,2007.
[2]鄢捷年.钻井液工艺学[M].东营:石油大学出版社,2001:127-148,222-235.
[3]曹书金,王雅新,卢景峰,等.耐温抗盐降粘剂的研制及评价[J].精细石油化工进展,2012,13(7):31-34.
[4]樊泽霞,王杰祥,孙明波,等.磺化苯乙烯-水解马来酸酐共聚物降粘剂SSHMA的研制[J].油田化学,2005(3):195-198.
[5]周玲.磺化苯乙烯-马来酸酐共聚物的合成及其性能研究[D].南京:南京理工大学,2007.
[6]何铁林.水处理化学品手册[M].北京:化学工业出版社,2000.
[7]边靖生,李波.国内钻井液用降粘剂的研究应用进展[J].广东化工,2013(1):69-70.
[8]邱广明.苯乙烯和马来酸酐共聚物的合成及其功能化膜和微球的研究[D].杭州:浙江大学,2006.
[9]张永明,朱红,王芳辉,等.改性纳米Si O2/磺化聚苯乙烯-马来酸酐降粘剂的研究[J].功能材料,2009,40(3):498-500.
[10]罗跃,胡红亮,王志龙,等.钻井液用降黏剂磺化苯乙烯-马来酸酐聚合物的合成与评价[J].精细石油化工进展,2011,12(1):13-15.
[11]中华人民共和国能源部.SY/T 5243—91水基钻井液用降粘剂评价程序[S].北京:石油工业出版社,2007.