对服役于高硫高盐原油中的失效管段的化学成分和显微组织进行分析，对产出水进行微生物检测，采用扫描电子显微镜（SEM）、能谱仪（EDS）及X射线衍射（XRD）等手段对腐蚀产物进行分析。结果表明：微生物腐蚀（MIC）是导致管道发生腐蚀泄漏的主要原因。油田产量低于预期造成管内原油低流速、含水率高于预期，以及停产后未及时清管造成游离水析出并沉积在管道底部，这些都为硫酸盐还原菌（SRB）等细菌的滋生繁殖创造了有利条件，从而导致管道的腐蚀失效。介质中的H₂S、CO₂以及Cl^-共同参与了腐蚀过程。

Corrosion failure of oil pipelines in a high-sulfur and high-salt oilfield was analyzed by means of chemical composition and microstructure analyses, microbiological detection of produced water, as well as corrosion morphology observation and corrosion product analysis using SEM, EDS, XRD etc. The results show that microbiological-induced corrosion (MIC) was the main reason of corrosion leakage of the pipeline. The oil production lower than expection resulted in low flow rate of the crude oil in the pipeline, the water cut was higher than expection. And the pipeline was not cleaned in time after the production, causing free water to precipitate at the bottom of pipeline. All of these created favorable conditions for the breeding and reproduction of sulfate reducing bacteria (SRB) and thus led to corrosion failure of the pipeline. H₂S, CO₂ and Cl^- in the corrosive medium jointly participated in the corrosion process.