电磁涡流在盐穴型储气库中的应用实践

Application of Electromagnetic Eddy Current Technology in Salt-Cavern Gas Storage Facilities

摘要: 在盐穴型、枯竭油气藏及含水层三类储气库中，盐穴型储气库因注采速度快、循环效率高，成为天然气储运系统中用于调峰与战略储备的关键设施。盐穴型储气库管道因其壁厚大(16 mm)、介质流速低、且采用非标清管阀进行收发作业，导致传统无损检测技术(如漏磁、超声)难以适用。本文以某储气库为例(壁厚16 mm)，详细阐述了针对性解决方案，包括采用定制化涡流检测器、优化收发工艺等，并通过对现场检测数据的分析，评估了管道内部的金属损失状况、分布规律和腐蚀速率，并结合开挖实证：电磁涡流技术能够有效、准确地完成此类复杂工况下管道的内检测，填补了行业技术空白，为其下一步在管道内检测中推广应用提供借鉴。

Abstract: Among the three types of natural gas storage facilities—salt cavern, depleted reservoir, and aquifer—salt cavern storage is characterized by its high injection/withdrawal rate and cycling efficiency, making it a critical infrastructure in natural gas storage and transportation systems for peak shaving and strategic reserves. However, the pipelines in salt cavern storage pose significant challenges for conventional non-destructive testing (NDT) techniques (such as magnetic flux leakage inspection and ultrasonic inspection) due to their large wall thickness, low medium flow velocity, and the use of non-standard pigging valves for launching and receiving operations. This paper presents a case (wall thickness is 16 mm) study of a specific salt cavern storage facility and elaborates on tailored solutions, including the adoption of customized eddy current testing tools and optimized pigging procedures. Through analysis of excavation data, the internal metal loss conditions, distribution patterns, and corrosion rates of the pipeline were evaluated. It shows that electromagnetic eddy current technology can effectively and accurately perform internal inspections under such complex conditions, filling a technological gap in the industry and providing a reference for its further application and promotion in pipeline internal inspections.