Patent ID: 9348058
Filing Date: 2016-05-24
CPC Classification: E21B,G01V,G06F

Claim Text:
1. A method for determining an inflow profile and parameters of a bottom-hole area in a multipay well comprising: changing a production rate of a perforated multipay well, measuring independently for each pay zone a temperature of a fluid flowing into the well from a pay zone through a perforation channel as a function of time, using a sensor located opposite the perforated channel, determining for each pay zone a derivative of the measured temperature by logarithm of a time passed after the well production rate has been changed, calculating a specific production rate q value for each pay zone as where A is a value of the determined derivative when it becomes constant, ε 0 is a Joule-Thomson coefficient, η—a fluid viscosity, k e —a reservoir permeability, calculating a production rate Q of each pay zone as Q=q·h where h is a thickness of a pay zone and determining the well inflow profile as a sum of the calculated production rates Q of all the pay zones.