METHOD OF QUANTITATIVE EVALUATION OF INFLOW PROFILE IN HORIZONTAL OIL WELLS WITH MULTISTAGE HFF Russian patent published in 2019 - IPC E21B47/103 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil production, in particular, to control of development of oil deposits by field-geophysical methods of wells investigations (FGI), and can be used for performance and interpretation of field-geophysical investigations of operating horizontal oil wells (HW) with multi-stage hydraulic fracturing of formation (MSHFF), to estimate inflow profile in order to justify intensification and optimization of formation. Method involves target injection of a temperature-contrast labeled substance into the formation and subsequent measurement of temperature distribution along the length of the barrel. At the same time in order to increase the accuracy of the method by estimating the fractions of the MSHFF seams/ports shares in the influx in the process selection conditions, as well as by excluding from calculations of invalid a priori information on heat conductivity of the formation, the well is started on a process selection mode, the range of required durations of which provides the required for calculation of the temperature anomalies contrast in the inflow intervals and at that is sufficient for cleaning formation from pumped liquid, is determined by criterion: 0.1⋅G_∑/Q<ΔT<0.3⋅G_∑/Q, where G_∑ – total volume of injected liquid (m³), Q is averaged process sampling yield (m³/day), after which the fraction of formations in the tributary is estimated based on the calorimetric mixing effect.

EFFECT: high accuracy of determining the fraction of contributions of individual perforated intervals of the HW or ports of MSHFF layout into total influx in operational low- and medium-rate oil wells, where the task can not be solved using flowmetering methods.

1 cl, 3 dwg