硫酸盐还原细菌处理海底输油管线的研究与应用

Research and Application of Sulfate Reducing Bacteria in Treating Submarine Oil Pipeline

某油田钻井平台CEPX的海底注入管线已投入运行,对管线进行了现场采样,发现管线中硫酸根还原细菌(SRB)数量已达10000个/mL,总锈蚀量已达15%。经试验和理论计算,该海底输油管线的锈蚀是由于SRB造成的锈蚀所致。为解决这一难题,采用优化药剂、优化注入点、改变药剂的投加量和投加量、减少清管时间等方法,解决了注入管线中硫酸根还原细菌的问题,达到了抑制管线腐蚀的目的。

The subsea injection pipeline of a certain oilfield drilling platform CEPX has been put into operation.Field sampling was conducted on the pipeline,and it was found that the number of sulfate reducing bacteria(SRB)in the pipeline has reached 10000/mL,with a total corrosion rate of 15%.According to experiments and theoretical calculations,the corrosion of the submarine oil pipeline is caused by SRB corrosion.To solve this problem,this project plans to adopt methods such as optimizing reagents,optimizing injection points,changing the dosage and dosage of reagents,and reducing cleaning time to solve the problem of sulfate reducing bacteria in the injection pipeline,thereby achieving the goal of inhibiting pipeline corrosion.