深井套管阴极保护的计算与分析  

CALCULATION AND ANALYSIS OF CATHODIC PROTECTION FOR DEEP WELL CASINGS

作　　者：赵健[1] 常守文[1] 张莉华[1] 孙魁[2] 赵应龙[2] 

机构地区：[1]中国科学院金属研究所,金属腐蚀与防护国家重点实验室,沈阳110016 [2]江汉油田设计研究院,钱江433123

出　　处：《腐蚀科学与防护技术》2003年第5期282-284,共3页Corrosion Science and Protection Technology

摘　　要：对江汉油田 30 0 0多米深的王 5 9井套管的阴极保护电位的分布进行了计算 ,计算结果与实测结果的相对误差均小于 8% .尽管如此 ,在阴极保护电流从 5A增大到 2 0A的情况下 。With the development of oil and gas fields in Western China,both the number and the depth of oil and gas wells increase very rapidly.To understand the performance of cathodic protection of a deep well,a cathodic protection system was applied to a Well W59 in the Jianghan Oilfield,which has a depth of over 3000 meters.The cathodic potential distribution induced by the impressed current was calculated for the well and compared with the downhole measured potentials.It follows that the differences between the calculated and measured potentials was less than 8%.However,the well casings were not cathodically protected completely though the cathodic currents were changed from 5A to 20A.

关 键 词：深井 套管 阴极保护 电位 计算 油田 腐蚀 

分 类 号：TE983[石油与天然气工程—石油机械设备] TG174.41[金属学及工艺—金属表面处理]