含低H2S和中等CO2气井的电化学腐蚀问题研究  

CORROSION PROBLEMS INDUCED BY WATERS CONTAINING LOW H_2S AND MEDIUM CO_2 FROM GAS WELLS AT A GAS FIELD

作　　者：曾亚勤[1] 李琼玮[1] 杨全安[1] 李明星[1] 何淼[1] 胡兴民[2] 

机构地区：[1]中国石油长庆油田公司油气工艺研究院,西安710018 [2]中国石油长庆油田公司采气一厂,靖边718500

出　　处：《腐蚀科学与防护技术》2009年第3期257-259,共3页Corrosion Science and Protection Technology

摘　　要：对近年来某气田低含H2S、中含CO2气井在不同产水量和产出水矿化度下的井筒碳钢管柱的腐蚀情况进行了分类分析,通过理论和室内试验研究了影响油管腐蚀的主要参数条件,明确电化学腐蚀特征.发现导致油管严重腐蚀和局部穿孔的主因是高矿化度的地层产出水、复杂的井下环境参数和特定的H2S/CO2分压,为今后减缓和控制腐蚀提出了研究方向.A survey on tubing corrosion case history ,which was induced by waters with low H2S and medium COg from gas wells in a gas field. While a review on the relevant operation parameters of production was also made. In order to understand the corrosion phenomenon of tubing steel in the field, series of corrosion test of tubing steel in well liquors was also conducted. The results demonstrate that the main factors responsible to the corrosion are the high brine content of well water,specific partial pressure of H2S and CO2 as well as the parameters of complex environments of wells. Then several measures such as surface treatment of tubing and new inhibitors etc. were proposed to solve the corrosion problems.

关 键 词：电化学腐蚀 气井 穿孔 高矿化度 地层产出水 

分 类 号：TG172.32[金属学及工艺—金属表面处理]