摘要
随着四川盆地高含硫气田的持续上产,深层/超深层、特高含H2S气体等愈发恶劣的工况环境对气田腐蚀控制提出了更高要求.围绕高含硫气田腐蚀控制难点及需求,系统梳理总结了近年来高含硫气田在材料腐蚀分析与评选、缓蚀剂防腐、腐蚀监/检测、腐蚀控制管理信息化4大方面取得的腐蚀控制技术最新研究进展和开发效果,提出了腐蚀控制关键技术的发展方向和建议.研究结果表明:①形成了 H2S分压大于1 MPa条件下的腐蚀分析和耐蚀材料评选技术体系,建成了国内唯一高含硫气田腐蚀与防护现场试验基地,支撑了国产化双金属复合管、耐蚀合金的大规模应用;②自主研发了集输系统碳钢配套用长效膜缓蚀剂、抑泡缓蚀剂和防冻缓蚀剂新体系并实现了国产化工业应用,性能较国际同类产品提高16％,同步解决了易发泡、水合物堵塞等生产问题;③研发了钢质管道全线腐蚀风险分布定量评价技术,形成了基于腐蚀单元划分及风险排序的野外远程在线集群监/检测体系,实现了全区域、全系统、全流程覆盖;④建立了腐蚀异常数据智能识别和腐蚀地图构建技术,自主研发了具备大数据管理、腐蚀预测、风险评估及实时预警、腐蚀控制管理功能的腐蚀智能诊断与管控平台,形成了腐蚀信息化管理能力.结论认为,中国高含硫气田腐蚀控制技术已全面实现国产化,建议在金属/非金属耐蚀新材料全生命周期适应性、多因素耦合下腐蚀机理、多功能缓蚀剂研发、腐蚀智能化管控应用等方面加强技术攻关,强化科研生产一体化和生产运行腐蚀综合管理,助力中国高含硫气田开发迈上新台阶.
Abstract
Along with the continuous production of high-sulfur gas fields in the Sichuan Basin,the harsh working conditions,for instance,in(ultra-)deep development and with extremely high H2S content,have raised stringent requirements for corrosion control.This paper reviews the recent researches in respect of corrosion control in high-sulfur gas fields,especially in four aspects:material corrosion analysis and assessment,corrosion inhibitor protection,corrosion monitoring/inspection,and informationization of corrosion control management,and proposes the prospect of key technologies for corrosion control.The following results are obtained.First,a technical system for corrosion analysis and corrosion-resistant material selection under the condition of H2S partial pressure greater than 1 MPa is established and the only field test base for corrosion control in high-sulfur gas fields in China is built,which support the large-scale application of domestic double-metal composite pipes and corrosion-resistant alloys.Second,a new group of long-lasting film corrosion inhibitor,foam suppression corrosion inhibitor,and anti-freezing corrosion inhibitor for carbon steel in the gathering and transportation system was independently developed and has been applied for domestic industrial purpose.These products demonstrate a performance of 16％higher than international equivalents,and help address the problems in production,such as foaming and hydrate plugging.Third,a quantitative evaluation technology for corrosion risks across steel pipelines is developed,and a field remote online cluster monitoring/inspection technology based on corrosion unit division and risk ranking is formed to allow for regional,system-wide,and whole-process coverage.Fourth,technologies for intelligent identification of corrosion anomaly data and corrosion mapping are developed,and an intelligent corrosion diagnosis and control management platform with capabilities of big data management,corrosion prediction,risk assessment & early warning,and corrosion control management is developed.These technologies and platform enable the information technology-based corrosion management.It is believed that the corrosion control technology for high-sulfur gas fields has been localized in China.It is recommended to devote more efforts in materials and technologies with respect to the lifecycle adaptability of new metal/non-metal corrosion-resistant materials,the corrosion mechanism of materials under multi-factor coupling,the development of multi-functional corrosion inhibitors,and the application of intelligent corrosion control,in integrated research and production,and in corrosion management in both production and operation,helping the high-sulfur gas field development in China to reach a new level.
维普
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