METHOD OF EVALUATION OF PARAMETERS OF FRACTURES OF FORMATION HYDRAULIC FRACTURING FOR HORIZONTAL WELL Russian patent published in 2021 - IPC E21B47/10 

FIELD: mining.

SUBSTANCE: invention relates to a method of measuring parameters of hydraulic fracturing cracks in horizontal wells with multiple hydraulic fracturing of the formation. Method comprises measuring non-stationary temperature profiles of produced fluid along well length in annular clearance between casing string and rock during production after well shutdown or after change of well flow rate. Position of anomalies in measured temperature profiles of produced fluid is used to define areas of location of hydraulic fracturing cracks along well length. From the rate of change of measured temperatures in areas of arrangement of fractures of hydraulic fracturing hydraulic conductivity of the fracture, flow rate of the crack and degree of reduction of the flow rate of the fracture, wherein in case of absence of influence of hydraulic conductivity of hydraulic fracture crack on flow rate of this fracture water content of fluid produced from crack is estimated by value of temperature change measured after extraction with duration of at least one month with constant flow rate.

EFFECT: technical result consists in enabling assessment of hydraulic conductivity of individual fractures of hydraulic fracturing, their flow rates, as well as assessment of water content of produced fluid.

8 cl, 17 dwg