LNG液化工艺在边远分散井中的应用分析  

Application analysis of LNG liquefaction technology in outlying dispersed well

作　　者：计维安[1] 温冬云[1] 

机构地区：[1]中国石油西南油气田公司天然气研究院

出　　处：《石油与天然气化工》2014年第1期39-43,共5页Chemical engineering of oil & gas

摘　　要：分析了天然气脱硫、脱水、脱碳、脱汞及凝液回收等预处理工艺对边远分散井的适应性,同时对阶式制冷循环、混合冷剂(MRC)制冷循环和膨胀机制冷循环3种天然气液化工艺应用于边远分散井的工作特性进行了对比。阶式制冷由于工艺复杂不适用于边远分散井。MRC制冷操作弹性大、能耗低、适应性较强,可在大多数边远分散井应用。膨胀机制冷操作简单、占地面积小且易橇装化,适合在工况较为稳定且有较高井口压力的场合应用。从当前的技术水平来看,不含硫、低含碳且重烃含量低的单井更适合进行LNG液化工艺的应用和推广。Adaptability of natural gas pretreatment process including desulfurization,dehydra-tion,decarburization,demercuration and condensate recovery in outlying dispersed well are ana-lyzed.In order to be used in outlying dispersed well,working characteristics of three natural gas liquefaction processes including cascade refrigeration cycle,mixed refrigerant refrigeration cycle and expander refrigeration cycle have also been compared.The process of cascade refrigeration cycle is too complex to be suitable for outlying dispersed well.MRC refrigeration has high flexi-bility,low energy consumption and strong adaptability,therefore it can be used to most of outlying dispersed wells.Expander refrigeration is characterized by simple operation,small occupied area and easy to be skid-mounted,so it is suitable for stable operation conditions and higher well head pressure. So far as current technology level,the sing wells containing no sulfur,low car-bon dioxide and low heavy hydrocarbon content are more suitable for outlying dispersed well.

关 键 词：LNG 液化 边远分散井 脱硫 脱水 脱碳 脱汞 凝液回收 

分 类 号：TE646[石油与天然气工程—油气加工工程]