高温多元热流体注采缓蚀剂的性能  

Performance of Corrosion Inhibitor in High Temperature Multi-component Thermal Fluid

作　　者：赵利昌[1] 马增华[1] 孙永涛[1] 林涛[1] 刘海涛[1] 王少华[1] 孙云豹[1] 何金杯[2] 王江顺[2] 付朝阳[2] 

机构地区：[1]中海油田服务股份有限公司,天津300450 [2]华中科技大学化学与化工学院,武汉430074

出　　处：《腐蚀与防护》2013年第1期64-66,70,共4页Corrosion & Protection

基　　金：国家重大科技专项(2011ZX05057-005-001)

摘　　要：多元热流体注采技术在渤海油田应用期间,油管腐蚀问题严重,针对该工艺研发出COSL-1缓蚀剂,现场应用腐蚀抑制情况良好。利用失重法和电化学极化对COSL-1缓蚀剂在二氧化碳和氧气共存条件下进行了研究,结果表明该缓蚀剂在90℃2MPa CO2和0.02MPa O2模拟注采溶液中的缓蚀率达到95%以上。动电位测试表明缓蚀剂主要通过改变阳极过程起缓蚀作用,在N80钢表面的吸附满足Langmuir吸附等温式。Multi-component thermal fluid exploitation enhanced the recovery factor of thick oil greatly in Bohai Oilfield, but also caused severe corrosion of oil tubes. Corrosion inhibitor COSL-1 was developed to prevent the corrosion with good result in oil well. The inhibition performance of COSL-1 was investigated by weight loss and polarization curves. The inhibition efficiency can reach 950% in simulated solution with 2 MPa CO2 and 0. 02 MPa 02 at 90 ℃. Electrochemical tests show that inhibitor COSL-1 belongs to mixed-type inhibitor and prohibits the corrosion anodic process principally, and the adsorption behavior of the inhibitor on steel N80 obeys the Langmuir isothermal equation.

关 键 词：多元热流体 N80钢 二氧化碳 氧气 缓蚀剂 

分 类 号：TG174.42[金属学及工艺—金属表面处理]