油田集输管线多介质环境腐蚀机理及防护技术  

Multi-media environment corrosion mechanism and protection technology of gathering and transportation pipeline in oilfield

作　　者：姬忠文 陈守民 苟利鹏 马琦力 JI Zhongwen;CHEN Shoumin;GOU Lipeng;MA Qili(Oil Production Technology Research Institute,No.5 Oil Production Plant,Changqing Oilfield,Dingbian 718615,China)

机构地区：[1]长庆油田第五采油厂采油工艺研究所,陕西定边718615

出　　处：《应用化工》2024年第7期1612-1615,共4页Applied Chemical Industry

基　　金：国家自然科学基金(21376189);中国石油长庆油田科技创新项目(2023CQKY-1185)。

摘　　要：针对姬塬油田某集输管线频繁发生刺漏、腐蚀失效的问题,开展了水质分析、腐蚀结垢产物分析、腐蚀挂片表面微观形貌及元素组分分析,研究了CO_(2)、H_(2)S、溶解氧、Cl^(-)及结垢离子多介质环境下腐蚀机理,腐蚀结垢治理方法进行了优选。结果表明,造成管道腐蚀的主要因素是CO_(2)-H_(2)S-Cl^(-)共存腐蚀和细菌腐蚀在局部腐蚀的发展过程中起促进作用造成的,通过采用新型缓蚀剂和涂层结合防腐技术,现场腐蚀速率降低至0.0118 mm/a,最大限度地减缓或降低集输管道的腐蚀,延长其使用寿命。In view of the problems of frequent leakage and corrosion failure in a gathering and transportation pipeline in Jiyuan Oilfield,water quality analysis,corrosion and scaling product analysis,surface morphology and element composition analysis were carried out.The corrosion mechanism under multi-media environment of CO_(2),H_(2)S,dissolved oxygen,Cl^(-)and scaling ions was studied,and the corrosion and scaling treatment methods were optimized.The results show that the main factors causing pipeline corrosion are CO_(2)-H_(2)S-Cl^(-)co-existing corrosion and bacterial corrosion,which promote the development of local corrosion.By new corrosion inhibitor and coating combined anti-corrosion technology,the on-site corrosion rate is reduced to 0.0118 mm/a,which can minimize or reduce the corrosion of gathering and transportation pipelines,and extend its service life.

关 键 词：集输管线 腐蚀速率 腐蚀机理 防腐措施 

分 类 号：TQ085[化学工程]