海上气举井筒温度预测模型及影响因素研究  

Research on Offshore Gas Lift Wellbore Temperature Prediction Model and Influencing Factors

作　　者：曹砚锋 邹明华 陈欢 杨阳 刘凯 张晓彤 CAO Yanfeng;ZOU Minghua;CHEN Huan;YANG Yang;LIU Kai;ZHANG Xiaotong(NKLOOGE(National Key Laboratory of Offshore Oil and Gas Exploitation),Beijing 102209,China;CNOOC Research Institute Ltd.,Beijing 100028,China;Yangtze University,Wuhan,Hubei 430100,China)

机构地区：[1]海洋油气高效开发全国重点实验室,北京102209 [2]中海油研究总院有限责任公司,北京100028 [3]长江大学,湖北武汉430100

出　　处：《北京石油化工学院学报》2024年第2期31-37,共7页Journal of Beijing Institute of Petrochemical Technology

基　　金：国家自然科学基金资助项目(62173049)。

摘　　要：针对海上油井的油套环空注天然气进行气举作业,建立了基于稳态压力分布模型与天然气物性参数的井筒瞬态温度分布计算模型。结合现场数据研究和分析了气举注入气温度、流量、组分及压力对气举过程中井筒温度分布的影响规律。结果表明:注入温度对井筒前段温度分布影响较大,但由于海水的干扰其作用的深度被极大限制;提高注入流量可以使井筒内流体温度明显降低;随着气体组分中CO_(2)含量的增加与CH_(4)含量的减少,井筒内天然气流体的温度明显增大;提高注入压力仅对海水段井筒温度能够产生影响,对地层段井筒温度无明显影响。A transient temperature distribution calculation model of wellbore based on steady-state pressure distribution model and physical parameters of natural gas was established for gas lift operation by injecting natural gas into the annulus of oil casing of offshore oil wells.Combined with the field data,the influence of gas injection temperature,flow rate,components and pressure on the temperature distribution of the wellbore during gas lift was studied and analyzed.The results showed that the injection temperature had a large effect on the temperature distribution in the front part of the wellbore,but the depth of its effect was greatly limited by the interference of seawater.Increasing the injection flow rate led to a significant reduction in fluid temperature in the wellbore.The temperature of the natural gas fluid in the wellbore increased significantly as the CO_(2) content of the gas components increased with the decrease in CH_(4) content.Increasing the injection pressure could have an effect on the fluid temperature in the seawater section and had no significant effect on the wellbore temperature in the formation section.

关 键 词：注天然气 海上油井 井筒温度 物性参数 耦合计算 

分 类 号：TE319[石油与天然气工程—油气田开发工程]