DOWNHOLE LOCAL SOLID PARTICLES COUNTING PROBE, PRODUCTION LOGGING TOOL COMPRISING THE SAME AND SAND ENTRY INVESTIGATION METHOD FOR HYDROCARBON WELLS

摘要

A downhole local solid particles counting probe (1) for counting solid particles (101) in a fluid (100) present in a hydrocarbon well in production comprising:an elongated and flexible protective tube (2) defining an internal cavity (5) terminating by a membrane wall (3) defining a tip (4), the protective tube (2) and the membrane wall (3) isolating the internal cavity (5) from the fluid (100) of the hydrocarbon well, the protective tube (2) and membrane wall (3) are made of metal or metal alloy and have a thickness (ei) such as to resist to the downhole hydrocarbon well pressure;a passive acoustic sensor (6) mounted inside the internal cavity (5), the passive acoustic sensor (6) having a front side (7) mechanically coupled on the membrane wall (3) of the tip (4);a characteristic dimension of the passive acoustic sensor (6) is similar to solid particles (101) average characteristic dimension, ranging from 0.5 mm to 1.5 mm, and a characteristic dimension of the membrane wall (3) defining the tip (4) ranges from 1 mm to 2 mm; andthe passive acoustic sensor (6) is arranged to detect acoustic waves (30) generated by solid particles (101) impacting the membrane wall (3) defining the tip (4) so as to resolve an individual impact from a single solid particle and to produce a signal representative of a count of solid particles.