METHOD FOR ESTIMATING EITHER FLOWBACK OR THE RESERVOIR FLUID PRODUCTION RATE FROM EITHER ONE INDIVIDUAL INLET OR THE CONTRIBUTION FROM SEVERAL INLETS SEPARATED BY INTERVALS IN A WELLBORE LOCATED IN AN OIL AND/OR GAS RESERVOIR

摘要

The present invention is related to a method for estimating either flowback or the reservoir fluids production rate from either one individual inlet or the contribution from several inlets separated by intervals in a wellbore located in an oil and/or gas reservoir. This invention enables the optimization of the number of the inlet separated by intervals and to maximize production. The wellbore according to the invention comprises a casing with a plurality of magnetic irregularity elements, specifically as casing collars in a preferred example of the invention. These magnetic irregularity elements generate magnetic perturbations within the casing. According to the method, one or more sensor elements are delivered in such a way that the flow drags them while the sensor elements record in time the magnetic perturbations generated by the magnetic irregularity elements. The location of the magnetic irregularity elements is known and the reading of perturbations allows estimating the velocity of the sensor element along the path direction of the casing, specifically the evolution of said velocity, and then the velocity of the fluid.