Patent Document ID: 8583378
Application ID: 12466460
Patent Flag: 1

Claim One:
1. Method of estimating physical parameters of a geological formation having a plurality of layers, comprising the following steps: equipping a well passing through the geological formation with a tube open at its bottom end; filling the tube and a bottom part of an annular space situated around the tube in the well with a first fluid; filling the rest of the annular space with at least one second fluid so that the fluids exhibit an interface in the annular space; disturbing a hydraulic balance of the fluids in the well; measuring the trend of quantities relating to properties of the fluids in the well based on all of the plurality of layers in contact with the first and second fluids; performing computer simulations of the hydraulic behaviour of the fluids having a disturbed balance in the well, each simulation using a model taking into account the plurality of layers, calculating a permeation flow rate of the first fluid into the layers of the plurality of layers in contact with the first fluid, calculating a permeation flow rate of the second fluid into the layers of the plurality of layers in contact with the second fluid, and using a set of values for said physical parameters of the plurality of layers of the geological formation and giving rise to a simulated trend of said quantities; and comparing the measured and simulated trends of said quantities to identify an optimum set of values for said physical parameters of the plurality of layers of the geological formation.