水合物抑制剂聚N甲氧基N甲基丙烯酰胺的研究  

Study on poly-N-methoxy-N-methylacrylamide as hydrate inhibitor

作　　者：史言康 李志元 刘丽强 滕厚开 徐慧 王素芳 赵清顺 韩恩山[1] SHI Yankang;LI Zhiyuan;LIU Liqiang;TENG Houkai;XU Hui;WANG Sufang;ZHAO Qingshun;HAN Enshan(College of Chemical Engineering,Hebei University of Technology,Tianjin 300401,China;CNOOC(Tianjin)Oilfield Chemical Co.,Ltd.,Tianjin 300452,China;CenerTech Tianjin Chemical Research&Design Institute Co.,Ltd.,Tianjin 300131,China;Beijing Zhongtian Lanqing Environment Technology Co.,Ltd.,Beijing 100102,China)

机构地区：[1]河北工业大学化工学院,天津300401 [2]中海油(天津)油田化工有限公司,天津300452 [3]中海油天津化工研究设计院有限公司,天津300131 [4]北京中天兰清环境科技有限公司,北京100102

出　　处：《工业水处理》2023年第10期157-162,共6页Industrial Water Treatment

基　　金：河北省自然科学基金项目(E2022202095)。

摘　　要：深海油田开采过程由于存在低温高压条件,管道中会因形成水合物而造成堵塞。设计并合成了新型水合抑制剂聚N-甲氧基-N-甲基丙烯酰胺(polyMEHAMs),以实现延缓水合物形成的目的。结果表明,polyMEHAMs在相对分子质量达到2.51×10~6(polyMEHAMs-6)时,具有明显的抑制水合物效果,其在去离子水中的浊点为63℃;在烷烃水体积比为1∶4、polyMEHAMs-6抑制剂投加量为2 500 mg/L、初始压力为4.0 MPa条件下,过冷度为10.8℃和12.3℃时polyMEHAMs-6抑制水合物的诱导时间分别为10.7 h和13.7 h,其在过冷度12.3℃下对水合物的抑制性能优于10.8℃。机理探索实验表明,疏水性—OCH_(3)基团与酰胺O==C—NHCH_(3)基团形成的O==C—NCH_(3)—OCH_(3)结构具有延缓水合物形成的能力。In the process of deep-sea oil field exploitation,due to the existence of low-temperature and high-pressure conditions,hydrates can form in the pipeline,causing blockage.A new type of hydration inhibitor poly(N-methoxy-Nmethylacrylamide)(polyMEHAMs) was designed and synthesized to delay the formation of hydrates.The results showed that when the polyMEHAMs had a relative molecular weight of 2.51×10^(6)(polyMEHAMs-6),it had a significant inhibitory effect on hydrates,with a cloud point of 63 ℃ in deionized water.Under the conditions of alkane and water volume ratio of 1:4,polyMEHAMs-6 inhibitor dosage of 2 500 mg/L and initial pressure of 4.0 MPa,the induction time of polyMEHAMs-6 inhibiting hydrates at subcooling of 10.8 ℃ and 12.3 ℃ were 10.7 hours and 13.7 hours,and the inhibition performance of inhibitors at subcooling of 12.3 ℃ was better than that at subcooling of 10.8 ℃.The mechanism exploration experiment showed that the hydrophobic—OCH_(3) group and the amide O=C-NHCH_(3) group formed O=C-NCH_3-OCH_(3) structure,which had the ability to delay hydrates formation.

关 键 词：天然气水合物 水合物抑制剂 丙烯酰胺聚合物 

分 类 号：X703[环境科学与工程—环境工程]