METHOD OF DETERMINING VOLUME OF HYDROCARBONS LOSSES IN WELLS Russian patent published in 2017 - IPC E21B47/10 

FIELD: oil and gas industry.

SUBSTANCE: method consists in that a stationary pressure sensor is installed in a well inter-tube space at the well head for registration of its readings in continuous time mode. The calculation of volume of associated oil gas extracted from the well for reporting period is carried out by sections of continuous pressure reduction in the inter-tube space in sensor zone, wherein up to atmospheric pressure according to the formula: , where V_loss - volume of light hydrocarbons losses in the form of associated oil gas discharged into atmosphere from well for reporting period; D is internal diameter of the casing string, m; d - outer diameter of the tubing string, m; H_dyn - is the dynamic liquid level in the inter-tube space at the time I of the discharge of the associated oil gas in the atmosphere, m; R_wh - indication of wellhead pressure sensor in the inter-tube space at the initial moment of the process of reducing the intertube pressure of the gas to atmospheric pressure, Pa; R_dyn - associated oil gas pressure in the zone of the dynamic liquid level at the initial moment of the process of reducing the intertube pressure of the gas to atmospheric pressure, Pa (determined by calculation, for example, by Laplacian-Babine formula); R_atm - atmospheric pressure equal to 1.013⋅10⁵ Pa; n is the number of short-term drops in well head pressure to atmospheric pressure for the reporting period.

EFFECT: accuracy of determination.

3 dwg