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Innov.pro

Sondex Limited

Robert Dovis

Jean-Pierre Martin

Jean-Michel Fedele

Damien Despax

Methods and devices for determining the quality of an oil well reserve or the like delivering a given fluid derived from a productive layer, by measuring the response R of the well. The method implemented by the device comprises modulating the fluid flow rate ( ) in the well ( ) by a sinusoidal function with a controllable preventer ( ), and measuring the variations in flow rate and pressure of the fluid respectively with a flow meter ( ) and a pressure sensor ( ), the response Rc of the well ( ); if the productive layer comprises a damaged zone having a positive formation damage of non-null thickness, is obtained by the equation (I), and the response Rf of the well; if the productive layer comprises a fracture having a negative formation damage, is obtained by the equation (II). The invention is applicable to oil prospecting.

Method and device for determining the quality of an oil well reserve

The present invention relates to analysis tools for analyzing the ground , from a surface thereof, by means of a sonde having a given analysis lobe and a resolution time T. The tool of the invention is essentially characterized by the fact that it comprises a drive head driven to move in continuous translation at a speed V relative to the surface and along a direction parallel to the surface , a skid , means for associating the sonde and the skid so that the sonde can analyze the rocks contained in its lobe , and means for coupling together the drive head and the skid so that the two elements can be displaced relative to each other along the direction over a distance D. The tool of the invention finds a particularly advantageous application in analyzing oil-bearing rocks surrounding the wall of an oil well , in order to determine both the distribution of the porosity of the rocks, and their associated permeability.

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Aix-en-Provence, France

Robert Dovis