二氧化碳驱油返回气提质利用方案比选  

Comparison and selection of return gas quality upgrading and utilization schemes in carbon dioxide enhanced oil recovery

作　　者：康玉阳[1] 刘松林[1] 金勇[1] 廉东 白友国[1] 张向阳[1] KANG Yuyang;LIU Songlin;JIN Yong;LIAN Dong;BAI Youguo;ZHANG Xiangyang(SINOPEC Jiangsu Oilfield Branch No.1 Oil Production Plant,Yangzhou 225000,Jiangsu,China)

机构地区：[1]中国石化江苏油田分公司采油一厂,江苏扬州225000

出　　处：《能源化工》2023年第4期27-31,共5页Energy Chemical Industry

摘　　要：为了更好地利用井口返回气中的二氧化碳和烃类,针对某油田二氧化碳驱油返回气的气源特征,结合油井装置现场实际情况,对二氧化碳和烃的分离及提质利用进行了研究,提出了2种二氧化碳驱油返回气的提质利用方案,对比了工艺脱水效果及膜分离效果,分析了应重点解决的问题。结果表明,直接对返回气进行压缩、预冷、干燥、脱水后再进行膜分离脱碳是较经济可行的方案,利用级间抽出气体的位能和减压冷量不足以弥补气体循环带来的压缩功耗。In order to better utilize the carbon dioxide and hydrocarbons in the returned gas from the wellhead,the study is conducted on the separation and utilization of carbon dioxide and hydrocarbons based on the gas source characteristics of the return gas in carbon dioxide enhanced oil recovery in a oilfield,combined with the actual situation of the oil well.Two quality improvement and utilization schemes for the return gas are proposed,and the dehydration and membrane separation effects of the process are compared.The problems that should be focused on are analyzed.The results show that it is more economical and feasible to directly compress,precool,dry,dehydrate and then decarbonize it by membrane separation.The potential energy of interstage extracted gas and the reduced pressure cooling capacity are insufficient to compensate for the compression power consumption caused by gas circulation.

关 键 词：二氧化碳 驱油 返回气 提质利用 

分 类 号：TE357.45[石油与天然气工程—油气田开发工程] TQ028.1[化学工程]