新型抗高温耐盐高效泥岩抑制剂合成与应用  

Synthesis and Application of a New High Temperature High Performance Salt Resistant Shale Inhibitor

作　　者：侯杰[1] 刘永贵[1] 宋广顺[1] 宋涛[1] 闫晶[1] 赵晓竹[1] 

机构地区：[1]大庆钻探工程公司钻井工程技术研究院,黑龙江大庆163413

出　　处：《钻井液与完井液》2016年第1期22-27,共6页Drilling Fluid & Completion Fluid

基　　金：大庆钻探工程公司科研项目"高性能水基钻井液体系研究与应用"(KN/2013-04)

摘　　要：目前常用的季铵盐、阳离子型抑制剂抑制性相对不足,在室内合成的聚胺抑制剂JY-1虽然抑制性较强,但其稳定性和抗温性均存在一定局限性。针对这种情况,在对JY-1结构进行剖析的基础上,对分子结构进行了重新设计,采用两步法自主合成出一种抗高温、耐盐的低分子量抑制剂JY-2。根据正交实验结果,得知其最佳合成条件为：反应温度220~240℃,反应时间4~5 h,催化剂加量为0.10%,单体B与多元醇摩尔比为1：1.8,还原剂加量为1.0%。红外光谱等检测结果表明,JY-2分子结构与设计相符,含有仲胺、叔胺基团,分子量适中（508 g/mol）,无毒性,不含易断裂的醚.键,推测出产物分子式为C_（23）H_（66）N_7O_4。抑制性评价、配伍性研究等室内实验表明,JY-2的抑制性与国外聚胺产品相当,比国内常用聚胺产品强,且长效抑制性好;与淡水和盐水钻井液都具有良好的配伍性,还具有一定的降滤失作用,适宜加量为0.5%~1.0%。以JY-2为核心处理剂的水基钻井液在大庆古693-104-平104井进行了应用,解决了嫩江组和姚家大段泥岩地层极易水化的难题,应用井段井径扩大率仅为7.1%,机械钻速为7.11 m/h。研究结果表明,JY-2抑制性突出、稳定性好,抗温可达180℃,能够应用于高水敏和易水化泥页岩地层。Quaternary ammonium salts and cationic inhibitive agents presently used are not strong enough in shale inhibition, Polyamine （such as JY-1）, although strong enough, has deficiencies in molecular stability and high temperature tolerance. To improve the molecular stability and high temperature tolerance of polyamine inhibitive agents, a high temperature salt resistant low molecular weight polyamine, JY-2, was synthesized, based on the profiling and re-design of molecular structure of YY-1. The optimum synthesis condition of JY-2 is as follows： reaction temperature 220-240 ℃, reaction time 4-5 h, catalyst concentration 0.10%, molar ratio of monomer B and a polyhydric alcohol 1 ： 1.8, reducing agent concentration 1.0%. IR spectroscopy showed that the actual molecular structure of JY-2 is conforming to the designed molecular structure, containing secondary amine and tertiary amine groups. JY-2 has moderate molecular weight （508 g/mo0, is nontoxic and contains no weak ether bonds. Laboratory analyses recommended that the molecular formula of JY-2 should be C23H66N704.JY-2 has inhibitive capacity similar to that of polyamines produced abroad, and is much more inhibitive than those presently used in China. JY-2 has good long-time inhibitive performance, and good compatibility with other additives used in fresh water base and saltwater base drilling fluids. Optimum treatment of JY-2 is 0.5%-1.0%. Water base drilling fluid using JY-2 as the main additive has been used the well Gu693-104-Ping104 in Daqing, solving the extremely water sensitive shale and clay stones of the Nenjiang Formation and Yaojia Formation. Percent of hole enlargement （hole section drilled with the JY-2 mud） was only 7.1%, and ROP was 7.11 m/h. Study and field application show that JY-2 has outstanding inhibitive capacity, good molecular stability and is tolerant to high temperatures to 180 ℃, and can be used in drilling highly water sensitive shale formations.

关 键 词：钻井液添加剂 抑制剂 聚胺 抗高温 耐盐 泥页岩地层 合成 环境保护 

分 类 号：TE254.3[石油与天然气工程—油气井工程]