塔里木油田采出天然气低温下产液烃特征研究  

Study on liquid hydrocarbons production characteristics of natural gas produced in tarim oilfield at low temperature

作　　者：刘煌[1] 王舰 图孟格勒 李瑞景 杨硕孔 LIU Huang;WANG Jian;TUMENG Gee;LI Ruijin;YANG Shuokong(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,Sichuan,China;Quality Inspection Center of PetroChina Tarim Oilfield Company,Korla 841000,Xinjiang,China;Guangzhou Gas Group Co.,Ltd.,Guangzhou 510150,Guangdong,China)

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500 [2]中国石油塔里木油田公司质量检测中心,新疆库尔勒841000 [3]广州燃气集团有限公司,广东广州510150

出　　处：《低碳化学与化工》2023年第4期141-146,共6页Low-Carbon Chemistry and Chemical Engineering

基　　金：国家自然科学基金(21606184)。

摘　　要：高效回收天然气中的低碳轻烃,具有重要的经济价值。为了确定塔里木油田不同区块采出天然气低温(243.15 K)下的产液烃能力,首先采用保压取样法,在现场处理站取得了天然气样品;然后进行了高压低温相平衡实验;基于相态实验结果,建立了天然气闪蒸热力学预测模型;最后结合物料衡算,确定了天然气低温下的产液烃能力,7个天然气样品潜在产液烃量TZ(处理站代号,下同)为596.42 g/m^(3)、YH为177.10 g/m^(3)、DN为145.52 g/m^(3)、LN为39.23 g/m^(3)、DB为27.28 g/m^(3)、KL为4.59g/m^(3)以及YM为60.23 g/m^(3)。研究结果与现场实际数据匹配良好,对现场天然气处理站运行工况设定和低温脱烃装置建设具有指导作用。Efficient recovery of low carbon light hydrocarbons from natural gas has important economic value.To accurately determine the ability of natural gas produced in different blocks of the Tarim oilfield to produce liquid hydrocarbons at low temperature(243.15 K),natural gas samples were obtained from the on-site treatment station by using the pressure preserving sampling method,and then the high-pressure and low-temperature phase equilibrium experiment was carried out.Based on the results of the phase state experiment,the thermodynamic prediction model of natural gas flash was established.Finally,combined with material balance,the liquid hydrocarbon capacity of natural gas at low temperature was determined.The potential liquid hydrocarbon production of seven natural gas samples,TZ(processing station code,the same as below) is 596.42 g/m^(3),YH is 177.10g/m^(3),DN is 145.52 g/m^(3),LN is 39.23 g/m^(3),DB is 27.28 g/m^(3),KL is 4.59 g/m^(3),and YM is 60.23 g/m^(3).The results of the study match well with the actual field data,and have a guiding role in setting the operating conditions of on-site natural gas treatment stations and constructing low-temperature dehydrocarbon devices.

关 键 词：天然气 液烃 相平衡 闪蒸模型 保压取样 

分 类 号：TE642[石油与天然气工程—油气加工工程]