METHOD AND DEVICE FOR DETERMINING THE QUALITY OF AN OIL WELL RESERVE

摘要

The invention concerns 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 inventive method implemented by the device is characterised in that it consists in modulating the fluid flow rate (4) in the well (1) by a sinusoidal function by means of a controllable preventer (5), and in measuring the variations in flow rate and pressure of the fluid respectively with a flow meter (7) and a pressure sensor (9), the response Rc of the well (1); 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.