地下储气库井筒流动与传热模型研究  

Study on Wellbore Flow and Heat Transfer Model for Underground Gas Storage

作　　者：薛文第 王艺[1] 陈哲 XUE Wendi;WANG Yi;CHEN Zhe(National Engineering Research Center of Oil and Gas Pipeline Transportation Safety/MOE Key Laboratory of Petroleum Engineering/Beijing Key Laboratory of Urban Oil and Gas Distribution Technology,China University of Petroleum,Beijing 102249,China)

机构地区：[1]中国石油大学(北京)油气管道输送安全国家工程研究中心/石油工程教育部重点实验室/城市油气输配技术北京市重点实验室,北京102249

出　　处：《工程热物理学报》2025年第3期909-917,共9页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.51576210)。

摘　　要：针对以二氧化碳为垫层的地下储气新技术需要,本文提出一种改进的地下储气库井筒流动与传热模型及其求解方法。数学模型上,引入流向因子以适应地下储气库注采的井筒气体流向交替变化特点,建立非稳态井筒导热模型,突破了Ramey解析模型的稳态假设限制,同时着重考虑二氧化碳在井筒流动中相态转换的影响。求解方法上,提出井筒流动压降非线性模型,采用牛顿迭代法全井筒整体求解,解决了传统逐点迭代法的不稳定问题,计算时间至少缩短了40%。To address the need for new technology in underground gas storage with carbon dioxide as the cushion gas,an improved underground gas storage wellbore flow and heat transfer model and its solution method are proposed in this paper.In terms of the mathematical model,a flow direction factor is introduced to adapt to the alternating gas flow direction in the wellbore for injection and extraction in underground gas storage.An unsteady wellbore thermal conduction model is established,overcoming the limitations of the Ramey’s analytical model.The impact of phase transitions in carbon dioxide flow in the wellbore is also considered.In terms of the solution method,a nonlinear model for wellbore flow pressure drop is proposed.The whole wellbore is solved by Newton iteration method,which solves the instability issues of the conventional point-by-point iteration method and reduces the computation time at least 40%.

关 键 词：地下储气库 碳封存 井筒 流动和传热 数值模拟 

分 类 号：TE822[石油与天然气工程—油气储运工程]