油气集输用热塑性塑料气体渗透性研究现状  

Research on Gas Permeation of Thermoplastics Used in Oil and Gas Pipelines

作　　者：李厚补 张学敏[2] 毛学强[3] 戚东涛 李振禄[3] 王明冲[3] 

机构地区：[1]石油管材及装备材料服役行为与结构安全国家重点实验室,陕西西安710077 [2]长安大学材料学院,陕西西安710064 [3]中国石油塔里木油田公司,新疆库尔勒841000

出　　处：《天然气与石油》2016年第1期84-88,12-13,共5页Natural Gas and Oil

基　　金：国家自然科学基金项目"油气耦合介质在热塑性塑料中的渗透特性及机理研究"(51304236)

摘　　要：耐腐蚀性能优良的热塑性塑料内衬复合管在含H_2S/CO_2油气集输领域的应用受到广泛关注。但在使用过程中,气体组分在热塑性塑料中的渗透导致部分内衬起泡失效,或逸出外界环境,给管线运行和生态环境带来安全隐患。系统分析了热塑性塑料渗透性的国内外研究现状,发现当前对油气集输环境下油气耦合介质在热塑性塑料中的渗透过程及规律等科学问题的解释还未见报道,而更未涉及对油气集输条件下热塑性塑料渗透机理的研究。建议应在充分考虑油气介质耦合作用、材料结构形态、外界物理场作用的基础上,全面、系统地研究油气多相介质在热塑性塑料中的渗透规律,建立材料在实际应用工况条件下的渗透率计算公式。同时,结合软件计算模拟,揭示油气耦合介质在热塑性塑料中的渗透机理。该研究不仅能为现有常用热塑性塑料的耐介质渗透性提供判定依据,还可为高阻隔热塑性内衬材料的研发提供借鉴。Application of thermoplastic lined with composite pipes in gathering and transportation of oil and gas which contains H_2S/CO_2 has attracted a wide spread attention due to its good corrosion resistance performance.However,gas permeation in thermoplastic trends to result in liner blistering or leaking,which will bring hidden danger to pipeline operation and environment.Systematically analyzed are current situations of researches on permeability of thermoplastics at home and abroad.Unfortunately,no information on permeation behaviors and mechanism of coupled oil and gas in thermoplastics are available up to now.It is proposed that full consideration is given to the coupled effect of oil and gas,material structural morphology and external physical fields,conducted is a comprehensive and systematic research on the permeation behavior of coupled oil and gas in thermoplastics,established is a suitable permeability calculation equation of thermoplastics under the actual working conditions.Meanwhile,the permeation mechanism of thermoplastics shall be fully studied in combination with software calculation and simulation.Such researches can not only provide decision basis for estimating permeation properties of traditional thermoplastics,but also can provide reference for improving their permeation properties.

关 键 词：热塑性塑料 渗透机理 油气环境 集输 渗透系数 酸性气体 起泡 

分 类 号：TE977[石油与天然气工程—石油机械设备]