METHOD FOR DETERMINING FLOW RATES AND DENSITY OF FORMATION FLUID OF OIL FORMATIONS AND LAYERS OF REDUCED, LOW AND ULTRALOW PRODUCTIVITY Russian patent published in 2013 - IPC E21B47/10 G01P5/00 G01N9/10 

FIELD: oil and gas industry.

SUBSTANCE: method for determining the flow rate and the density of formation fluid of oil formations consists in shaping of signals when a sensitive element passes through the specified levels in the well. Measurement of time intervals between signals, with further calculation of the flow rate of the formation in relation to distance between specified levels to time interval between the appropriate pulses. Measurement of movement speed of several sensitive elements is performed. Flow rate of each next above-lying oil formation or layer is determined as difference between previous and current measurements. Density of formation fluid is determined as integral density value of the last sensitive element that floated up to the surface and that one that did not float up to the surface.

EFFECT: improving measurement reliability of flow rate and density of formation fluid.

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