大庆油田油水井套管手镯阳极防腐室内模拟实验  

INDOOR EXPERIMENTAL SIMULATION OFANTICORROSION PERFORMANCE OF BRACELET ANODE FOR OIL-WATER WELLS IN DAQING OILFIELD

作　　者：陈月勋[1] 朱殿瑞[1] 李福军[1] 李晓川[1] 

机构地区：[1]大庆石油学院,大庆163318

出　　处：《腐蚀科学与防护技术》2007年第6期442-443,共2页Corrosion Science and Protection Technology

基　　金：黑龙江省专利基金(黑财字[2004]135号);黑龙江省青年基金Q00C039号

摘　　要：提出了适合大庆地区的套管防腐技术—手镯阳极套管防腐技术,通过室内模拟实验确定手镯式阳极的最佳组合方式.结果表明,每只手镯式阳极极化半径超过9m,极化场呈辐射状.在浅表层100m内每一根套管固定一个手镯式阳极是最佳的组合方式;套管保护电位均负于-850mV(SCE),套管保护电流可极化到地下100m.In view of the fact that casing corrosion leakage gets more and more intense year by year in oil- water wells in Daqing oilfield, we made a survey on the corrosion situation of casings in oil-water well and the relevant corrosivity of soils of the oil field. The result indicated that the casing corrosion is induced by many factors. Corresponding to the distribution of oil-water wells in Daqing Oil Field, for which an anticor- rosion technology by means of the so called bracelet anode is proposed. The technology is applicable to the new drilling oil-water well as well as the oil-water of put out casing in Daqing oilfield. Through the experi- ment in laboratory, we define the best arrangement of bracelet anodes. The result indicated that the effective polarization radius of bracelet anodes is larger than 9 m. The best arrangement is that a bracelet anode is fixed in every casing within a depth up to 100m deep. The protection potential of the casing is below - 850 mV（SCE） ,whilst the protectiveness offered by polarization current may reach up to 100 m in depth.

关 键 词：套管 手镯阳极 防腐 极化半径 保护深度 

分 类 号：TG174.3[金属学及工艺—金属表面处理]