一种新型高温酸化缓蚀剂的制备及其应用  

Study and Application of a New Corrosion Inhibitor for High Temperature Acidization

作　　者：张朔 吕选鹏 刘德正 徐庆祥 马田力 黄其 

机构地区：[1]中国石油集团渤海钻探工程有限公司,天津300457

出　　处：《钻井液与完井液》2017年第5期100-105,共6页Drilling Fluid & Completion Fluid

基　　金：中石油渤海钻探工程有限公司项目"高温酸化缓蚀剂的研究"(2016JXJF-01)

摘　　要：为了满足高温高压井酸化施工的需求,以3-甲基吡啶,氯化苄为主要原料,合成了一种吡啶类季铵盐。在吡啶类季铵盐中复配一定比例的增效剂和表面活性剂,制备出一种新型高温酸化缓蚀剂HTCI-2,并对其基本性能进行评价。由评价结果可知,在180℃、16 MPa,20%HCl或者土酸,4.5%加量条件下,N80试片的腐蚀速率为38.1 g/(m2·h)和39.6 g/(m2·h)。通过SEM电镜扫描、EDS能谱测试和极化曲线测试可以看出,HTCI-2为一种以抑制阳极反应过程为主的混合型缓蚀剂。HTCI-2能在N80钢片表面形成一层致密的保护膜,有效地阻止酸液和钢铁表面的接触。HTCI-2不含有毒的炔类化合物,与常用的酸化添加剂配伍性良好。在滨深油田滨深22-8井进行了现场试验,工程施工顺利。A pyridine quaternary ammonium salt has been developed to satisfy the needs of HTHP acidization operations. The pyridine quaternary ammonium salt was synthesized with 3-methryl pyridine and benzyl chloride as the main raw materials, and a certain ratio of extender and surfactant were added to the product to produce a corrosion inhibitor, HTCI-2 used in high temperature acidizing operations. Evaluation of HTCI-2 showed that the corrosion rate of an N80 coupon was 38.1 g/（m2fh） or 39.6 g/（m2fh） under these conditions 180 ℃,16 MPa, 20% HCl （or 12%HCl ＋ 3%HF） and 4.5% of HTCI-2. SEM analyses, EDS energy spectrum and polarization curve experiments showed that HTCI-2 is a hybrid corrosion inhibitor that functions through inhibiting anodic reaction. By forming a tight flming against the surface of N80 coupon, HTCI-2 effectively prevents the surface of the steel from being contacted with acids. HTCI-2 is free of toxic alkyne compounds, and is compatible with commonly used additives for acidizing operations. Acidizing job in the well Binshen22-8 in Binshen block was conducted smoothly.

关 键 词：吡啶类季铵盐 缓蚀剂高温酸化 电镜扫描 增效剂 表面活性剂 极化曲线 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]