页岩气远程采气监控系统级防腐技术研究与应用

Research and Application of System-Level Anti-Corrosion Technology for Shale Gas Remote Gas Production Monitoring System

摘要: 随着全球能源结构向清洁低碳转型，页岩气作为非常规天然气资源，在保障国家能源安全和实现“双碳”目标中具有战略意义。然而，页岩气开采过程中面临CO₂腐蚀、气井水淹和有毒有害气体泄漏等技术瓶颈，传统开采模式存在监测滞后、防腐剂浪费及人工依赖度高的问题。文章基于GWDC和孚泰油气装备有限公司的研发成果，介绍了一种页岩气远程采气监控系统及防腐技术。该系统集成实时监测、智能防腐、风险预警和远程协同功能，通过多参数传感器、闭环调控专利技术和信息化平台，实现气体成分分析(CO₂测量精度 > 95%、水蒸气 > 97%)、缓蚀剂动态注入和风险预警。应用结果表明，该系统在24口页岩气井中累计安全生产121.16万工时，井下管柱平均腐蚀率降至0.023 mm/a，较人工加注对比井的0.156 mm/a降低85.26%，防腐剂单井年均消耗量减少28.3%，显著提升了开采安全性和经济性。本研究为页岩气智能开采提供了关键技术支撑，契合国家能源安全战略。

Abstract: With the global energy structure transforming to clean and low-carbon, shale gas, as an unconventional natural gas resource, is of strategic significance in ensuring national energy security and achieving the “dual carbon” goals. However, shale gas exploitation faces technical bottlenecks such as CO₂ corrosion, gas well water logging, and leakage of toxic and harmful gases. Traditional exploitation modes have problems including lagging monitoring, waste of corrosion inhibitors, and high dependence on manual labor. Based on the R&D achievements of GWDC and Futai Oil & Gas Equipment Co., Ltd., this paper introduces a remote gas production monitoring system and anti-corrosion technology for shale gas. The system integrates real-time monitoring, intelligent anti-corrosion, risk early warning and remote collaboration functions. Through multi-parameter sensors, patented closed-loop control technology and an informatization platform, it realizes gas component analysis (CO₂ measurement accuracy > 95%, water vapor > 97%), dynamic injection of corrosion inhibitors and risk early warning. The application results show that the system has achieved a total safe production of 1,211,600 man-hours in 24 wells in Jilin Oilfield and Daqing Oilfield. The average corrosion rate of downhole tubing is reduced to 0.023 mm/a, which is 85.26% lower than 0.156 mm/a of the manual injection comparison wells, and the average annual consumption of corrosion inhibitor per well is reduced by 28.3%, significantly improving the safety and economic efficiency of exploitation. This study provides key technical support for intelligent shale gas exploitation and is in line with the national energy security strategy.