METHOD OF ANALYSING HORIZONTAL WELLS WITH MULTISTAGE HYDRAULIC FRACTURING IN LOW-PERMEABILITY HEADERS Russian patent published in 2020 - IPC E21B47/10 E21B47/06 

FIELD: oil, gas and coke-chemical industries.

SUBSTANCE: proposed invention relates to oil industry and can be used for monitoring operation of horizontal wells (HS) with hydraulic fracturing (MHF) Method includes recording and interpretation by best combination of flow rate and bottomhole pressure, determination of permeability, skin factor, average half-length and average conductivity of hydraulic fracturing cracks and formation boundary parameters. At that, data of mini-hydraulic fracturing of the formation are additionally interpreted, field geophysical survey is carried out to determine profile of inflow with subsequent interpretation of obtained data. Flow rate and bottomhole pressure data are interpreted by calculating half-lengths of each fracture of hydraulic fracturing by numerical minimization of calculated yields of fractures and actual fracture yields, measured during field geophysical survey to determine inflow profile. At that, sum of half-lengths of cracks found is equal to product of number of cracks on average half-length of cracks, obtaining updated permeability values, skin-factor, average conductivity of hydraulic fracturing cracks and parameters of formation boundaries, by best matching method by interpreting data on production rate and bottom-hole pressure with allowance for found values of half-lengths of each fracture of hydraulic fracturing of formation and initial formation pressure obtained during interpretation of data of mini hydraulic fracturing of formation.

EFFECT: technical result is improved quality of data interpretation of flow rate and bottomhole pressure of HS with MHF.

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