METHOD AND DEVICE FOR QUANTITATIVE DOWNHOLE MONITORING OF MULTIPHASE FLOW Russian patent published in 2024 - IPC E21B47/11 E21B43/38 E21B49/08 

FIELD: oil, gas and coke-chemical industry.

SUBSTANCE: group of inventions relates to a method and a device for quantitative downhole monitoring of a multiphase flow containing at least two phases of any of oil, water or gas in an oil well. Method comprises using at least one discharge chamber comprising a flow phase separation section, a delay chamber, one or more outlet ports, at least two flow limiters, an indicator outlet system with one or more indicators, separation of the withdrawn flow in the discharge chamber into a low-density flow phase and a high-density flow phase. At least one indicator is released into said delay chamber. Separated low-density flow phase is passed through at least a first flow restrictor, and the high-density flow phase is passed through at least a second flow restrictor. Low-density flow phase and the high-density flow phase with an indicator are washed out from the discharge chamber through outlet ports into the local flow inside the well. Said at least one indicator is monitored in produced flow at detection point downstream of outlet ports. Concentration of said one or more indicators in controlled flow is measured.

EFFECT: increased efficiency of downhole monitoring of multiphase flow in oil well.

29 cl, 47 dwg