Patent ID: 7082812
Filing Date: 2006-08-01
Classification: G01N

Abstract:
1. A method for evaluating, with a single equipment, physical parameters of a fragmented porous medium from rock fragments taken in this medium, comprising a stage of immersing fragments contained in a containment chamber in a liquid and of intermittently communicating the chamber containing the fragments with a source of liquid under pressure comprising an accumulator containing an elastic volume of liquid, so as to compress the gas trapped in the pores of the rock, a stage of measuring the volume of liquid injected, a stage of modelling the evolution of the volume of liquid injected from a priori selected initial values at least for permeability and the residual gas saturation, and a stage of iterative adjustment of the value of the physical parameters of the rock fragments so as to obtain the best possible adjustment of the modelled evolution of the volume injected with the measured evolution of the volume injected in the chamber, characterized in that: during the stage of immersion, in the liquid, of the fragments contained in the containment chamber, the volume of liquid injected is measured by measuring the concomitant pressure variation in said accumulator.