新型高温酸化缓蚀剂的制备及性能评价  

Synthesis and performance of a novel acidizing corrosion inhibitor for high temperature reservoirs

作　　者：王业飞[1] 王婧 杨震 杨江 郭雷 WANG Yefei;WANG Jing;YANG Zhen;YANG Jiang;GUO Lei(School of Petroleum Engineering,China University of Petroleum(East China),Qingdao 266580,Shandong,China;School of Petroleum Engineering,Liaoning Petrochemical University,Fushun 113001,Liaoning,China;School of Material and Chemical Engineering,Tongren University,Tongren 554300,Guizhou,China)

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580 [2]辽宁石油化工大学石油化工学院,辽宁抚顺113001 [3]铜仁学院材料与化学工程学院,贵州铜仁554300

出　　处：《化工进展》2024年第10期5712-5722,共11页Chemical Industry and Engineering Progress

基　　金：国家重点研发计划政府间国际科技创新合作重点专项(2021YFE0107000);国家自然科学基金面上项目(52074339)。

摘　　要：为了更好地减缓油气田高温酸化下金属的腐蚀,研究出一种耐高温且配方简单的复合酸化缓蚀剂。以喹啉和氯化苄为原料,采用“一锅法”制备得到了一种新型稠杂环季铵盐(BQD)缓蚀主剂。通过添加甲酸、乌洛托品等复配剂,经过单因素失重法优选,得到一种配方简单的新型高温酸化缓蚀剂GS-1,通过电化学测试、表面形貌分析研究其缓蚀性能,采用分子模拟的方法研究BQD的缓蚀机理。结果表明,GS-1缓蚀剂在添加量为3%时,在160℃下盐酸与土酸的酸化环境中,N80钢片的腐蚀速率分别降低至41.63g/(m^(2)·h)、31.94g/(m^(2)·h),均可达行业标准要求;GS-1缓蚀剂可在N80钢片表面形成一层吸附保护层,属于兼具抑制阳极和阴极反应的混合型缓蚀剂;量子化学计算及分子动力学模拟表明,BQD的缓蚀活性优于常见的苄基喹啉季铵盐缓蚀剂(BQC),同时BQD分子是以共轭平面为基准,与金属基底平行的角度被吸附于界面上,具有更加高效的缓蚀性能。In order to better slow down the corrosion of metal under high temperature acidification in oil and gas fields,a compound acidizing corrosion inhibitor with high temperature resistance and simple formula was investigated.A novel fused heterocyclic quaternary ammonium salt(BQD)was prepared by‘one-pot’reaction with quinoline and benzyl chloride as raw materials.A novel high temperature acidizing corrosion inhibitor GS-1 with simple formula was obtained by weight loss method optimization of single factor analysis with synthetic BQD as the main agent,adding formic acid,urotropine and other compound agents.At the same time,its inhibition performance was studied by electrochemical test,surface morphology analysis and quantum chemical calculation.And the inhibition mechanism of BQD was studied by molecular simulation.The results showed that when the dosage of GS-1 corrosion inhibitor was 3%,the corrosion rates of N80 steel sheets in hydrochloric acid and mud acid at 160℃were 41.63g/(m^(2)·h)and 31.94g/(m^(2)·h),respectively,which were better than the requirements of industry standards.The high temperature inhibitor GS-1 could form an adsorption protective film on the surface of N80 steel sheets,which could inhibit the mixed corrosion inhibitor of anode and cathode reaction at the same time.Quantum chemical calculations and molecular dynamics simulations indicated that the corrosion inhibition activity of BQD was better than that of the common benzylquinoline quaternary ammonium salt corrosion inhibitor(BQC).At the same time,the BQD molecule was based on the conjugated plane and was adsorbed on the interface at an angle parallel to the metal substrate,which had more better inhibition performance.

关 键 词：新型稠杂环季铵盐 缓蚀性能 高温酸化 腐蚀 电化学 量子化学计算 分子模拟 

分 类 号：TQ047.6[化学工程]