埋地油气管道腐蚀风险管控体系的构建

Construction of Corrosion Risk Management and Control System for Underground Oil-Gas Pipelines

腐蚀风险是影响埋地油气管道安全的重要因素,如何全面识别腐蚀风险,并将其降低到可接受范围,对油气管道的安全运行具有重要意义。通过对国内油气管道腐蚀防控技术应用和管理中普遍存在的问题进行剖析,全面识别腐蚀风险因素,从腐蚀防护系统、腐蚀防护制度、管道内外检测、基于腐蚀的管道数字孪生体4个方面进行分析,构建了完善的腐蚀风险管控体系。设计阶段应建立完善的腐蚀防护系统;运行阶段应做到外防与内控并重,建全腐蚀防护制度,抓好腐蚀风险分级管控及干扰源的源头防治;设定统一的数据参考点,实现管道内外检测数据对齐;建立基于腐蚀大数据的管道数字孪生体,实时映射管道的腐蚀现状,为管理决策提供依据。

Corrosion risk is an important part of the safety management of buried oil and gas pipelines.How to comprehensively identify the corrosion risk and reduce it to an acceptable range is very significant for the safe operation of oil and gas pipelines.By analyzing the typical problems existing in the application and management of oil and gas pipeline corrosion prevention and control technology in China,the paper comprehensively identified the corrosion risk factors,analyzed them from four aspects:corrosion protection system,corrosion protection institution,internal and external detection of pipeline and digital twin of pipeline based on corrosion,and built a perfect corrosion risk management and control system.Then it is shown that perfect corrosion protection system shall be established in the design stage;In the operation stage,both external prevention and internal control should be paid equal attention,including establishing the whole corrosion protection institution,and enhancing the hierarchical control of corrosion risk and the source prevention and control of interference sources.In addition,uniform data reference points should be set so as to make the alignment of pipeline internal and external inspection data;The digital twin of pipeline based on corrosion big data should be established to map the corrosion status of pipeline in real time,and thus provide basis for management decision-making.