某油气水混输不保温海底管道的腐蚀原因及控制措施  

Corrosion Causes and Control Measures of Uninsulated Subsea Pipeline for Oil,Gas and Water Transport

作　　者：杨根全 张峙 胡丽华 王治国 陈大江 YANG Genquan;ZHANG Zhi;HU Lihua;WANG Zhiguo;CHEN Dajiang(CNOOC China Limited Zhanjiang Branch,Zhanjiang 524057,China;CNOOC Research Institute Co.,Ltd.,Beijing 100028,China)

机构地区：[1]中海石油(中国)有限公司湛江分公司,湛江524057 [2]中海油研究总院有限责任公司,北京100028

出　　处：《腐蚀与防护》2024年第9期120-125,共6页Corrosion & Protection

摘　　要：对某油气水混输不保温海底管道开展了多次智能内检测,发现在不同时间段海底管道前段及中段存在大量局部腐蚀缺陷点。通过腐蚀模拟试验、通球清管产物及微生物测试分析、海底管道温度变化曲线分析等手段,对该海底管道腐蚀原因进行了系统分析。结果表明:海底管道前段及中段产生大量腐蚀缺陷点的原因是硫酸盐还原菌和腐生菌,以及沉积物垢下腐蚀相互作用,不同时间段海底管道缺陷点发生位置不同是由物流入口温度变化从而改变管道沿程温降引起的。近年来,采取了加强通球清管措施、调整杀菌剂的注入、监测杀菌剂杀菌效果等措施后,海底管道腐蚀状况得到了缓解,腐蚀状况未见明显加剧。The intelligent internal inspection show that many corrosion defects were found in the front and middle sections of an oil,gas and water mixed transportation uninsulated subsea pipeline.The corrosion causes of the subsea pipeline were analyzed by simulated corrosion experiment,pigging products and microbial test analysis,and temperature change curve analysis.The results show that a lot of number of corrosion defects in the front and middle sections of the pipeline were caused by the interaction between SRB and TGB which induced corrosion and underdeposit corrosion.The different locations of the defects in the subsea pipeline at different time were caused by temperature drop along with pipeline because of the change in the inlet temperature.In recent years,measures such as adding pigging,adjusting the injection of bactericide and monitoring the effect of bactericide have been taken,the corrosion of subsea pipeline has been alleviated,and the corrosion has not accelerated significantly.

关 键 词：海底管道 微生物腐蚀 沉积物垢下腐蚀 

分 类 号：TG988.2[金属学及工艺—钳工工艺]