海上平台伴生气脱酸工艺技术改进和评价  

Improvement and evaluation of deacidification process technology for offshore platform associated gas

作　　者：葛怀栋 GE Huaidong(Shenzhen Company,CNOOC)

机构地区：[1]中海石油(中国)有限公司深圳分公司,山东省德州市251500

出　　处：《石油石化节能与计量》2025年第1期1-5,共5页Energy Conservation and Measurement in Petroleum & Petrochemical Industry

摘　　要：为实现海上油田伴生气的深度处理和综合利用,在梳理常规醇胺法脱酸工艺的基础上,通过增加级间冷却器、实施富液分流和优化醇胺溶液配方等措施,形成了改进工艺流程,通过单因素分析确定了关键参数对工艺的影响趋势,分析了改进工艺对不同生产阶段的适应性。结果表明,MDEA质量分数应控制在30%~35%,PZ质量分数应控制在2%~3%,级间冷却温度的变化与工艺能耗呈反比,再沸器温度的变化与工艺能耗呈正比;优化后,生产前期的脱碳单位能耗可从4.79 GJ/t降低至4.34 GJ/t,降幅9.39%;该工艺可适用于伴生气量10×10^(4)~17×10^(4) Nm^(3)/d、CO_(2)含量14.32%~25.64%的工况,且回流罐气相可直接用于后续的CCUS驱油使用。研究结果可为海上油田伴生气脱酸系统的节能改造提供理论依据和实际参考。In order to realize the advanced treatment and comprehensive utilization of associated gas in offshore oilfields,the improved process has been formed by adding inter-stage coolers,implementing rich liquid diverting and optimizing the formulation of alcohol amine solution on the basis of combing the conventional deacidification process.The influence trend of key parameters on the process is determined by single factor analysis,and the adaptability of the improved process on the different production stages is analyzed.The results show that the mass fraction of MDEA and PZ should be controlled 30%~35%and 2%~3%separately.The change of inter-stage cooling temperature is inversely proportional to process energy consumption while the change of reboiler temperature is positively proportional to process energy consumption.After optimization,the unit energy consumption of decarbonization in the early stage of production can be reduced from 4.79 GJ/t to 4.34 GJ/t,with a decrease of 9.39%.The process can be applied to the working condition range of associated gas volume of 10×10^(4)~17×10^(4) Nm^(3)/d and CO_(2) content of 14.32%~25.64%,and the gas phase of return tank can be directly used for subsequent CCUS flooding.The research results can provide theoretical basis and practical reference for energy conservation transformation of associated gas deacidification system in offshore oilfield.

关 键 词：海上平台 伴生气 脱酸 参数优化 脱碳单位能耗 

分 类 号：TE54[石油与天然气工程—油气田开发工程]