环氧类内涂层在酸性气田集输管道适用条件探究  

Study on the applicable conditions of epoxy inner coating in the gathering and transportation pipeline of sour gas field

作　　者：张楠革 顾锡奎[1,2,3] 闫静 吴华[1,2,3] Zhang Nange;Gu Xikui;Yan Jing;Wu Hua(Research Institute of Natural Gas Technology,PetroChina,Southwest Oil&Gasfield Company,Chengdu,Sichuan,China;National Energy R&D Center of High Sulfur Gas Exploitation,Chengdu,Sichuan,China;High Sulfur Gas Exploitation Pilot Test Center,CNPC,Chengdu,Sichuan,China)

机构地区：[1]中国石油西南油气田公司天然气研究院 [2]国家能源高含硫气藏开采研发中心 [3]中国石油天然气集团公司高含硫气藏开采先导试验基地

出　　处：《石油与天然气化工》2020年第2期58-62,68,共6页Chemical engineering of oil & gas

基　　金：中国石油天然气股份有限公司重大科技专项“西南油气田天然气上产300亿立方米关键技术研究与应用——四川盆地气田开发地面系统安全清洁高效运行关键技术研究与应用”(2016E-0610)。

摘　　要：为探究酸性气田集输管道中各腐蚀影响因素对环氧类防腐内涂层关键性能指标的影响,确定内涂层在酸性气田集输管道的适用条件,实验室采用动态高温高压釜模拟现场不同的工况条件对涂层样品进行浸泡实验。通过涂层测厚仪、涂层附着力测试仪、绝缘电阻测试仪分别测试涂层在实验前后的厚度、附着力、绝缘性能及表面形貌的变化,进而探究不同的腐蚀影响因素对环氧类内涂层关键性能指标的影响。实验表明:环氧类防腐内涂层在H 2S质量浓度低于20 g/m^3、CO 2质量浓度低于100 g/m^3、液相流速低于2 m/s的腐蚀环境中具有一定的适应性,涂层的关键性能指标(厚度、绝缘电阻等)变化不明显;环氧类内涂层初步具备在酸性气田集输管线应用的条件。In order to explore the influence of various corrosion factors on the key performance indicators of epoxy anti-corrosion inner coating in gathering pipeline of sour gas field,and determine the applicable conditions of inner coating in the gathering pipeline of sour gas field,immersion experiments of coating samples are carried out with simulated different working conditions by a dynamic high temperature autoclave in the laboratory.The thickness,adhesion,insulation performance and surface morphology of epoxy coating are measured by coating thickness tester,coating adhesion tester and insulation resistance tester before and after,and then the influence of different corrosion factors on the key performance indicators of epoxy coating are explored.The experiments show that epoxy anti-corrosion inner coating has certain adaptability in corrosive environment including hydrogen sulfide concentration is lower than 20 g/m^3,carbon dioxide concentration is lower than 100 g/m^3 and liquid flow rate is lower than 2 m/s.The key performance indicators(thickness,insulation resistance,etc.)of the coating do not change significantly.The epoxy inner coating can preliminary apply in the gathering pipeline of sour gas field.

关 键 词：酸性气田 H 2S CO 2 内涂层 流速 

分 类 号：TE988.2[石油与天然气工程—石油机械设备]