Institut Francais Du Pe'trole

Philippe Poulain

Marc Fleury

Patrick Egermann

Gabriel Ringot

Jean-Claude Marchand

A method and device is disclosed for evaluating simultaneously, and with the same equipment, the electric resistivity and flow parameters of a porous medium, from experimental measurements obtained from at least one multi-flow type displacement experiment which has application in oil reservoir development. The method continuously measures as a function of time the differential pressure between two ends of a sample, the electric resistivity of the sample and, for each stabilization step, at least two values of a displaced fluid production volume are also measured. A continuous curve of the displaced fluid production volume, from which flow parameters are estimated by means of a numerical flow simulator, is then deduced therefrom.

Method and device for evaluating flow parameters and electric parameters of porous medium

The invention is a process and device for performing successive drainage and imbibition phases of a first electrically-conducting fluid and a second fluid of lower density than the first fluid, in a porous sample (,) by means of a centrifuge. Each sample is placed in a main chamber (,) of an elongate vessel (,) fastened to the end of an arm of the centrifuge, together with a spacer (,) whose volume is so selected that, on the one hand, the interface between the two fluids does not come into contact with the sample in operation and, on the other hand, the volume of chamber (,) remaining free around the sample and the associated spacer is greater than, but preferably close to the pore volume of the sample, so as to maximize the displacement amplitude of the interface for a given variation of the volume of fluid displaced. A capacitive sonde (,) in an auxiliary cavity (,), connected to an outer measuring device, is used for measuring the displacements of the interface. The invention has applications of surveying of rocks taken from an underground reservoir.

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Carrières sous Poissy, France

Philippe Poulain