焊管2025，Vol.48Issue(9)：35-39,5.DOI:10.19291/j.cnki.1001-3938.2025.09.006
电加热对煤层气井筒内超临界二氧化碳传热特性影响研究
Research on Heat Transfer Characteristics of Supercritical Carbon Dioxide in Coalbed Methane Wellbores
摘要
Abstract
To address the lack of research on the heat transfer characteristics of multi-field coupled supercritical carbon dioxide under in-situ conditions,a numerical calculation model of heat-fluid-solid coupling downhole electric heating supercritical carbon dioxide heat transfer was established.By simulating the flow and heat transfer process of supercritical carbon dioxide in vertical wellbore,the heat transfer characteristics of supercritical carbon dioxide under different formation pressure and heating power were analyzed.The results show that the temperature of supercritical carbon dioxide increases with the increase of heating power.When the heating power increases from 3 kW/m to 4 kW/m,the temperature of sheath and supercritical carbon dioxide rises sharply,and the rise of sheath temperature is much larger than that of supercritical carbon dioxide.When the formation pressure increases from 8 MPa to 12 MPa,the pressure drop,heat transfer coefficient and supercritical carbon dioxide velocity decrease,and the supercritical carbon dioxide temperature does not change significantly.关键词
超临界CO2/煤层气/井筒/电加热/传热特性Key words
supercritical carbon dioxide/coalbed methane/wellbore/electric heating/heat transfer characteristics分类
能源科技引用本文复制引用
王创业,葛腾泽,董亮亮,杨小平,徐小虎,师阳,周超..电加热对煤层气井筒内超临界二氧化碳传热特性影响研究[J].焊管,2025,48(9):35-39,5.基金项目
中国石油集团公司关键核心技术攻关项目"井下大功率电加热器研制"(项目编号2024ZG23) （项目编号2024ZG23）
中联煤层气国家工程研究中心有限责任公司科技项目"井下二氧化碳电加热装置设计与研发"(项目编号2024-ZXKJ-06) （项目编号2024-ZXKJ-06）
中石油煤层气有限责任公司科技项目"超临界二氧化碳驱替、热解与封存技术研究"(项目编号2024-KJ-17). （项目编号2024-KJ-17）
