Measuring method for anisotropic permeability by non-uniform radial flow in a whole core

A comprehensive method to measure the formation plane anisotropic permeability was proposed.The core was bored through along the central axis.The testing fluid was injected into the core cylinder from the central hole and formed a plane radial flow perpendicular to the core axis and then flowed out from the core side surface.The solution of the flow in the core was obtained by the solution of the flow from a circular anisotropic reservoir with a steady pressure boundary to a center well.The flow rate in every direction was measured.The directions of the maximum flow rate and the minimum flow rate are respectively the maximum and minimum directions of the principal permeability.The principal permeability values were calculated by the pressure difference between the inside and outside of the core and flow velocity on the core side surface in the principal permeability directions.The calculation formulas were proposed on the flow analysis.The actual measured core data are in good agreement with the results of theoretical analysis.