摘要
以顺丁烯二酸酐及二乙醇胺为原料,采用“一步熔融法”合成了端羟基超支化聚酯酰胺(HBP-OH);以环氧氯丙烷改性HBP-OH制得端基为氯甲基的超支化聚酯酰胺(HBP-ECH);以三乙胺改性HBP-ECH制得端基为季铵基的超支化聚酯酰胺(HBP-L),其结构经IR表征。研究了HBP-L的静态防膨率、耐水洗能力及对岩心的渗透伤害率。结果表明:HBP-L加量为1wt%时,粘土防膨率为90.36%;经10次水洗后,其防膨率仍超过85%;模拟地层温度为45℃时,HBP-L对岩心的渗透伤害率仅3.86%。采用XRD和Zeta电位法分析了HBP-L对粘土水化膨胀及运移分散的抑制机理。结果表明:经1wt%HBP-L处理的粘土,其晶层间距为6.91nm,较去离子水处理层间距(4.71nm)小;粘土表面的zeta电位由-39.2mV升高至-19.6mV。
HBP-OH,a hydroxyl-terminated hyperbranched polyesteramide was prepared from maleic anhydride and diethanolamine by one-step melting method. HBP-OH was modified with epichlorohydrin to prepare a hyperbranched polyesteramide with chloromethyl-terminal group(HBP-ECH). HBP-L,a hyperbranched polyesteramide with end-group of quaternary ammonium(HBP-L) was synthesized through the modification of HBP-ECH with triethylamine. HBP-L was characterized by infrared spectroscopy and used as a clay stabilizer for oil-field flooding. The results showed that the anti-swelling rate of HBP-L was 90.36% when the addition of HBP-L was 1 wt %. After washed for ten times,the anti-swelling rate was still above 85%,and when the simulated formation temperature was 45 ℃,permeability damage rate to core was only 3.86%. XRD and Zeta potential method were used to reveal the inhibition mechanism of HBP-L on clay hydration swelling and dispersing migration. The results indicated that the interlayer spacing of clay treated with 1 wt %HBP-L was 6.91 nm,which was smaller than deionized water treated clay(4.71 nm),and the zeta potential of clay surface increases from -39.2 mV to -19.6 mV.
作者
李治衡
董平华
岳明
刘欢
LI Zhi-heng;DONG Ping-hua;YUE Ming;LIU Huan(State Key Laboratory Offshore Oil Exploitation,CNOOC China Ltd.,Tianjin Branch,Tianjin 300459,China;College of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu 610500,China)
出处
《合成化学》
CAS
北大核心
2019年第10期788-792,共5页
Chinese Journal of Synthetic Chemistry
基金
中海油天津分公司“动态复杂压力体系下提升固井质量的水泥浆优化工艺及评价技术研究”(CCL2018TJTSWST0378)
关键词
超支化聚合物
粘土稳定剂
制备
防膨率
抑制机理
hyperbranched polymer
clay stabilizer
preparation
anti-swelling rate
inhibition mechanism
