METHOD FOR SEPARATE DERERMINATION OF THE AMOUNT OF DISSOLVED GAS AND CAP GAS IN ASSOCIATED PETROLEUM GAS Russian patent published in 2021 - IPC G01N33/26 

FIELD: oil and gas.

SUBSTANCE: invention is designed for use when operating wells with a gas ratio exceeding the gas content. The method for the separate determination of the amount of dissolved gas and gas cap gas in associated petroleum gas includes joint production of gas and gas caps dissolved in oil from an oil and gas reservoir, hydrodynamic studies, including technological measurements of associated gas flow rate, while determining the proportion of dissolved gas in the associated gas for the produced gas, a hydrodynamic model is built with the option of passive indicators, using functions that reflect changes in the relative phase permeabilities, physical properties of the fluid and reservoir, material balance, based on the model, the amount of gas dissolved in oil in reservoir conditions at the time of the start of reservoir development is determined, marking it with a special passive indicator, then the model is adapted on the basis of historical operating data and hydrodynamic studies of wells, by achieving minimal deviations of the calculated and historical data in terms of the dynamics of bottomhole and reservoir pressures, oil flow rates, water and gas, based on passive indicators, the accumulated and current production of dissolved gas is determined for all production wells at each specific point in the development time of the reservoir.

EFFECT: technical result is to ensure possibility of determining the proportion of dissolved gas and gas of a gas cap in associated petroleum gas during the development of oil and gas deposits.

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