摘要
•We have developed a new core flood test for the characterization of transverse dispersion and dilution in three dimensions in natural-rock media.•Dt were calculated using three different methods: (1) fitting to an analytical solution, (2) from the second-central moment and (3) from the dilution index.•Dt decreased with distance due to flow focusing.•Sub-linear behavior of Dt with Pe was observed in the power law regime.•The reactor ratios were high confirming the homogeneity of the Berea sandstone.