【摘要】 针对新能源背景下油田生产的绿电资源难以消纳及CO₂驱矿场应用中油气难以混相的难题，经过室内实验发现电场可以强化储层CO₂驱油气混相，提出面向矿场应用的“电场+CCUS”新模式。实验结果表明：电场可以有效提高致密砂岩储层CO₂驱油效率，且存在最佳的电场强度，其中，以1 V/cm的电场强度作用效果最好，可促使驱油效率达到71.25%，相比未加电场作用下的驱油效率（55.34%），增幅可达28.75%；通过对不同电场强度下的出口端原油开展气相色谱和傅里叶红外光谱分析发现，电场可以促使原油中的重质组分含量下降，中质组分含量上升；基于原油组分结果利用单烷烃形成复配模拟油，采用高温高压可视化反应釜开展油气混相实验发现，电场作用后的模拟油最小混相压力为21.6 MPa，相比电场施加前的模拟油最小混相压力（22.5 MPa），最小混相压力下降了4%。研究表明，电场通过调控原油组分增强CO₂—原油的混相能力，进而提高了CO₂驱油效果，为“电场+CCUS”新模式在矿场规模化应用提供理论和技术支撑。更多还原

【Abstract】 This study aims to tackle the challenges of underutilized wind and solar-generated green electricity in oilfields under the context of renewable energy and the difficulty of achieving CO2-oil miscibility in field applications.Laboratory experiments reveal that electric fields can enhance oil-gas miscibility during CO2 flooding.On this basis,a novel “Electric Field+ CCUS” model for field applications is proposed.Experimental results demonstrate that electric fields can significantly improve CO2 flooding efficiency in tight sandstone reservoirs,with an optimal electric field strength identified.Specifically,an electric field strength of 1 V/cm yielded the best oil displacement efficiency of 71.25%,representing a28.75%increase compared to the 55.34%efficiency observed without the electric field.Gas chromatography and Fourier transform infrared spectroscopy analyses of crude oil at the outlet under varying electric field intensities indicate that the electric field contributes to a decrease in the content of heavy components and an increase in that of medium components.Based on the component analysis of crude oil,single alkanes were used to reconstitute simulated oil blends.High-temperature and high-pressure visual reactor experiments demonstrate that the minimum miscibility pressure(MMP)of the simulated oil treated with the electric field is 21.6 MPa,exhibiting a4%reduction compared to the MMP of 22.5 MPa before application of the electric field.The study shows that electric fields can enhance CO2-oil miscibility by modulating crude oil components,thereby improving CO2 flooding efficiency.This provides both theoretical and technical support for the large-scale application of the“Electric Field+CCUS” model in oilfields.更多还原