FIELD: oil and gas industry.
SUBSTANCE: this invention is referred to methods for determining properties of productive formations at oil and gas deposits, in particular to an assessment of their properties. The method for determining the properties of a productive formation drilled by a well includes injection of fluid with a variety of tracer agents of a submicron size to the well bore and productive formation, waiting of flowback and determination of the formation properties. These properties are defined by an analysis of variations in the tracer distribution function against the size and type in the injected and produced fluid.
EFFECT: more efficient assessment of the porous formation properties.
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