Abstract
This paper describes experimental research on two-phase flow of supercritical CO_2 and water in a Berea sandstone core. We used a magnetic resonance imaging (MRI) technique to directly visualize the distribution of supercritical CO_2 injected into the sandstone core containing water. In-situ saturation distributions were successfully visualized under the temperature and pressure conditions corresponding to the aquifers at the depth of about 900m with a projection method every 10 seconds. A new coreflood interpretation method proposed by Good field et al. was applied to in-situ saturation data to evaluate two-phase flows in sandstone directly. We have experimentally demonstrated that capillary dispersion rate could be evaluated as a function of water saturation independent of viscosity and buoyancy.
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