基于吩噻嗪自组装的页岩抑制剂研究  

Study on shale inhibitor based on phenothiazine self-assembly

作　　者：唐睿 刘丹洁 文科 李振 罗元 奉庆萤 朱光芹 TANG Rui;LIU Dan-jie;WEN Ke;LI Zhen;LUO Yuan;FENG Qing-ying;ZHU Guang-qin(Drlling Engineering Research Institute,SINOPEC Southwest Petroleum Engineering Co.,Ltd.,Deyang,Sichuan,618000,Chian)

机构地区：[1]中国石化西南石油工程有限公司钻井工程研究院,四川德阳618000

出　　处：《化学研究与应用》2024年第1期144-150,共7页Chemical Research and Application

基　　金：西南石油工程公司科研项目(XN-2022-0015)资助。

摘　　要：针对当前页岩抑制剂的抑制性不足,影响上部泥岩地层钻进的问题,本文设计并合成了一种含有长链、吩噻嗪等疏水基团的小阳离子聚合物SWPE。采用FT-IR、~(1)H NMR、GPC和TG对SWPE进行结构表征;以油田钻井常用的聚胺抑制剂NH-1为对照,评价SWPE的抑制性和配伍性;最后,基于泥岩岩屑表面的官能团、电性、微观形貌、元素含量、润湿性等变化,提出吸附包被机理。实验结果表明,SWPE表现出比NH-1更好的抑制效果,是一种非常有潜力的页岩抑制剂。To solve the problem of poor inhibition performance of current inhibitors during the drilling process of upper mudstone formations,a small cationic polymer SWPE containing hydrophobic groups,such as long alkyl chain and phenothiazine,was designed and synthesized.The structure of SWPE was characterized by FT-IR,~(1)H NMR,GPC and TG.The inhibition and compatibility performances of SWPE were evaluated using NH-1,a commonly used inhibitor in oilfield drilling,as the control.Ultimately,according to the changes of functional groups,electrical properties,micromorphology,element content and wettability of mudstone cuttings surface,a coating mechanism based on adsorption is proposed.The experimental results show that SWPE is a promising shale inhibitor with better performance than NH-1.

关 键 词：页岩抑制剂 小阳离子聚合物 疏水膜 抑制机理 自组装 

分 类 号：O636.41[理学—高分子化学]