Full text loading...
This study has designed a CO2 flooding microscopic sandstone model using core samples from Chang 8 reservoir of Jiyuan oilfield, Ordos Basin. By modifying the core holder for the microscopic sandstone model to withstand high temperature and pressure, a set of high-temperature and high-pressure CO2 flooding microscopic visualization displacement apparatus has been established. This apparatus accurately characterizes the CO2 flooding seepage characteristics of ultra-low permeability reservoir cores and analyzes the influencing factors of CO2 flooding efficiency. It aims to provide theoretical guidance for future field trials and practical applications of CO2 flooding in this type of reservoir.