FIELD: petroleum industry.
SUBSTANCE: invention relates to the field of petroleum and gas industry, in particular, to the field of operation of horizontal boreholes, and can be used in the development of petroleum, gas, and gas condensate fields. The method includes using tracer tags characterising the operation of the borehole, followed by analysing the contents of the tracer tags in the borehole fluid. In the implemention of the method, at least one chamber containing tracer tags is temporarily installed along the length of the borehole during operation in the flow of borehole fluid, configured to be removed and/or moved in the borehole, said being suitable for isolation into the surrounding borehole fluid in order to determine the interval inflow and phase composition of the borehole fluid.
EFFECT: possibility of obtaining qualitative and quantitative information on the inflow of fluids from various intervals of the layer.
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