A comprehensive analysis of factors influencing CO2-oil displacement in sandstones under reservoir conditions by online nuclear magnetic resonance testing

Abstract Carbon Capture, Utilization and Storage-Enhanced Oil Recovery (CCUS-EOR) technology can effectively improve crude oil recovery while simultaneously sequestering CO 2 in geological formations to reduce emissions. The distribution and migration patterns of oil and gas in reservoir rock masses remain one of the key issues worthy of study, among which CO 2 -oil displacement experiments are the most direct research method. Nuclear Magnetic Resonance (NMR) provides technical assurance for the