Patent ID: 7693677
Filing Date: 2010-04-06
Classification: G01N

Abstract:
1. A method of determining a 3D distribution of absolute permeability in a heterogeneous sample to a flow of fluid therein, comprising: providing a 3D porosity map obtained from the sample; performing a static measurement of the 3D porosity map of the sample; performing at least one viscous miscible displacement test during which an evolution of differential pressure is determined on either side of the sample; determining a 1D absolute permeability profile along the sample using evolution of the differential pressure; constructing a 3D permeability map from the 3D porosity map; estimating a simulated differential pressure by simulating numerically a viscous miscible test from the 3D permeability map and the 1D absolute permeability profile; and determining the 3D distribution of the absolute permeability of the heterogeneous sample by modifying at least once the 3D permeability map to minimize a difference between the simulated differential pressure and differential pressure measured over of time.