塔河油田集输管道内FeS的形成及自燃风险  

Risk analysis on formation and spontaneous combustion of FeS in gathering pipeline of Tahe Oilfield

作　　者：高淑红[1] 张江江[1] 张志宏[1] 陈微[1] 

机构地区：[1]中国石化西北油田分公司,新疆乌鲁木齐830011

出　　处：《油气储运》2014年第1期111-114,共4页Oil & Gas Storage and Transportation

摘　　要：塔河油田集输管道输送介质具有高含H2S、高含CO2及高含氯离子的特点,在无氧且低流速环境下,易生成FeS等腐蚀产物,FeS具有自燃性,一旦发生自燃将会引发火灾和爆炸事故。采用X-射线衍射测试方法对腐蚀产物组分进行分析,在H2S、CO2共存体系下,腐蚀产物以FeCO3、FeO(OH)、Fe3O4为主,铁的硫化物以FeS为主,但含量较低。采用加热的方式,利用固体自燃点测试仪对不同组分的7个腐蚀产物混合物进行自燃特性分析,结果表明:FeCO3可以表现出一定放热,但不会发生自燃;对于FeCO3与FeS形成的混合物,当两者质量比为15:10、单质硫磺的质量分数为2.67%时,FeCO3和FeS混合物自燃点为189.08℃,易发生自燃,建议在现场断管作业中采取预防FeS自燃的措施。(图2,表2,参6)。The corrosion product FeS in the gathering pipeline of Tahe Oilfield is hypergolic. Once FeS spontaneously combusts, it will trigger fire and explosion accidents. The oil and gas in the pipeline has high contents of H2S, CO2 and chloride ion, and are likely to form corrosion products like FeS, etc. in the anaerobic environment with low flow velocity. X-ray diffraction test is adopted to analyze the components of corrosion products. It is found that under the coexisting condition of H2S and CO2, the corrosion products are mainly composed of FeCO3, FeO（OH）and Fe304, while the sulfide of ferrum is mainly FeS with low content. Spontaneous combustion characteristics of seven corrosion products mixtures of different components are analyzed with solid spontaneous combustion point tester by heating. Results show that FeCO3 gives out heat, but it can not combust spontaneously. For the mixture of FeCO3 and FeS, when the mass ratio of them is 15：10 and the mass fraction of elemental sulfur is 2.67%, the spontaneous ignition temperature of the mixture of FeCO3 and FeS is 189.08 ℃ and the mixture is therefore prone to combusts spontaneously. It is suggested to take precautions to prevent FeS＇s spontaneous combustion in field pipeline＇s fire work. （2 Figures, 2 Tables, 6 References）

关 键 词：塔河油田 集输管道 腐蚀产物 FES 自燃 

分 类 号：TE88[石油与天然气工程—油气储运工程]