METHOD OF DETERMINING EFFICIENCY OF GEOLOGICAL AND TECHNICAL MEASURES Russian patent published in 2024 - IPC E21B47/10 E21B43/16 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry and can be used to determine efficiency of geological and technical activities in production or injection wells. Disclosed is a method for determining the efficiency of a geological and technical measure, which includes determining, through time intervals, the actual accumulated oil withdrawals in the period after the application of the geological and technical measure. At that, recording through time intervals of operational parameters of the well, on which the geological and technical action was carried out, and operational indicators of operation of surrounding wells in perimeter of two steps of grid of production facility during duration of effect from performance of geological and technical measures. At that, registration of operating parameters of wells is carried out at least once a month, and in case of recording of operating performance of wells more than twice a month, arithmetic average value is taken as operating performance of well. As operational indicators of operation of wells, on which geological and technical action is carried out, the following is used: daily oil flow rate, measured in t/day; or daily intake, measured in m³/day, at the same time if the well is producing, daily flow rate is recorded, if the injection well – daily intake. Only daily oil flow rate measured in t/day is used as operational parameters of operation of surrounding wells. Further, responding wells are determined in the perimeter of two grid pitches of the production facility, for this purpose, in pairs, the operational indicator of the well, on which the geological and technical measure was carried out, is compared with the operational indicators of the wells of the environment, and establishing the correlation relationship in the coordinated changes in the operating performance of the wells using the Kendall or Spearman rank correlation technique. Responding wells are those whose correlation coefficient is equal to 0.5 and higher in module of number. Efficiency of the performed geological and technical measures is determined by calculating the total production for the well, on which the geological and technical measures were carried out, and by surrounding reacting wells during the duration of the effect from the geological and technical measures.

EFFECT: simplification, as well as increased objectivity and reliability of the method for determining the efficiency of geological and technical measures, including in injection wells.

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