Sondex Limited

Innov.pro

Damien Despax

Jean-Pierre Martin

Jean-Michel Fedele

Robert Dovis

The present invention relates to a method of evaluating the hydraulic potential of a porous stratum defined between two depths zand z, the method consisting in generating periodic modulation in the rate of flow from the well, in lowering down the well and in activating for a few periods at the depth za measuring PLT sonde, in extracting from the resulting measurements the amplitude &#x394;Qof the sinusoidal component of the flow rate modulation relating to one of the imposed periods T, the amplitude &#x394;Pof the sinusoidal component of the pressure modulation relating to the same period T, and the phase delay of the pressure sinewave relative to the flow rate sinewave &#x3c6;,    

Method of determining the per strata reserve quality of an oil well

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.

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Aix-en-Provence, France

Damien Despax