FIELD: oil and gas production.
SUBSTANCE: invention relates to oil and gas production and can be used in systems of on-line control of mode of operation of downhole rod pumping installations. Method of definition of output of oil wells is in that by means of dynamograph it is received dynamometre card of operation of downhole rod pumping installations (DRPI), it is defined value of output by rate of filling of pump piston of installation at its motion with open delivery valve. Additionally it is created mathematical model of system "well - rod pumping installation". At stage of identification of mathematical model parametres to particular downhole rod pumping installation it is calculated by means of mathematical model individual theoretical dynamometre card of property-sheet mode of downhole rod pumping installation. For this there are successively changed parametres of system "well - rod pumping installation", it is compared calculation dynamometre card of property-sheet mode of downhole rod pumping installation with practical dynamometre card of property-sheet mode of downhole rod pumping installation from database of dynamometre card by this well up to achievement of minimal by defined criteria rate of its divergence. At the stage of usage of mathematical model for definition of output it is imitated operation of installation by means of mathematical model, considering current values of effort on bars and piston stripping, measured by dynamograph. At achievement of minimal by defined criteria rate of divergence of practical and calculated by mathematical model of dynamometre card it is calculated exact moment of closing of forcing valve, corresponding rate of underflow of pump, proportional to output of oil well.
EFFECT: increasing definition accuracy of current output of well ensured by more accurate analytical identification of operation cycle of DRPI and accurate definition of closing moment of delivery flap.
3 cl, 6 dwg, 1 ex
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