Sixty-eight pipeline failures occurred at the gas-gathering stations located in the southwestern section of a shale gas field, whereas no failures were reported for the corresponding pipelines in the northeastern section of the same field. This paper reports a comprehensive comparative analysis of the pipeline failures in the two sections of the field. Failure case statistical analyses, environmental media inspection, matrix materials examination, macro- and microscopic morphologies observation, corrosion products detection, and CFD analysis were carried out to understand the significant difference between two sections in terms of pipeline failures. Our analyses demonstrate that an abundance of bacteria were present in the water produced in both sections of the shale gas field. Most of the pipeline failures occurred after approximately 1 year. The number of failures tended to increase significantly over 3 years of service. Pitting corrosion at the bottom of pipelines, erosion-corrosion and weld corrosion at elbows were identified as the key contributing causes of the pipeline failures. Microbiologically influenced corrosion (MIC) and under-deposit corrosion was the root cause of sixty-six percent of pitting corrosion failures at the bottom of the pipelines. Erosion-corrosion and weld corrosion at elbows totally accounted for 34% of failures. Flow characteristics in the pipelines were finally determined to be one of the underlying causes of the notable difference in the corrosion behavior of the pipelines in the two sections. Pertinent countermeasures have been proposed in this paper. It is hoped that this work will help corrosion engineers involved with designing, monitoring, and managing pipelines to improve their designs and subsequent monitoring and treatment of pipelines to prevent premature failure of gathering pipelines in shale gas fields.

页岩气田西南段的集气站发生了68条管线故障，而同一地区东北段的相应管线则没有发生故障的报道。本文报告了该领域两个部分中管道故障的全面比较分析。进行了故障案例统计分析，环境介质检查，基体材料检查，宏观和微观形态观察，腐蚀产物检测以及CFD分析，以了解在管道故障方面两段之间的显着差异。我们的分析表明，在页岩气田两段所产生的水中都存在大量细菌。大多数管道故障是在大约1年后发生的。在服务3年后，故障数量趋于显着增加。管道底部的点蚀，肘部的腐蚀腐蚀和焊缝腐蚀被认为是造成管道故障的主要原因。受微生物影响的腐蚀（MIC）和沉积不足腐蚀是造成管道底部点蚀腐蚀故障的百分之六十六的根本原因。肘部的腐蚀腐蚀和焊缝腐蚀占故障总数的34％。最终确定管道中的流动特性是造成这两部分管道腐蚀行为显着差异的根本原因之一。本文提出了相应的对策。希望这项工作将有助于腐蚀工程师参与设计，监控，