METHOD OF OPERATING GAS OR GAS CONDENSATE WELL Russian patent published in 2025 - IPC E21B43/12 

FIELD: obtaining oil and gas from wells.

SUBSTANCE: invention relates to oil and gas industry and can be used in operation of gas and gas condensate wells. Disclosed is a method of operating a gas or gas condensate well equipped with a tubing string, in which, without killing the well, a central tubing string (CTS) is lowered into it and installed concentrically with the tubing with formation of annular space (AS), after which the space of CTS and AS is shut off and pressure in the CTS is measured, taking into account of which the current formation pressure is calculated. Then, with closed space of the CTS, the well is operated with removal of gas-liquid flow (GLF) along the AS. At the same time well operation is carried out in several modes, changing flow rate of GLF in each mode. At that, in each of the modes, the GLF is extracted, during the time required for its stabilization, as well as in each mode pressure at the AS wellhead, pressure at the CTS wellhead are measured, and the GLF flow rate is measured by means of a double-phase flow meter (DFM). Thereafter, current bottomhole pressure is calculated based on pressure measured at the CTS wellhead in each mode. Based on the calculated values of the current bottomhole and current formation pressure and the values of the flow rate of the GLF, the coefficients of the filtration resistance of the formation are calculated; also, according to the measured values of the flow rate of the GLF in each mode, the water-gas factor is calculated and its dependence on the well flow rate is determined. After that, operating mode of the well is established. At the same time, first, in the operating mode, extraction is carried out along the AS, and control of the well operation is carried out by changing the flow rate of the GLF through the CTS. Then, the well characteristics are calculated during operation in the AS, graphs of the well flow rate dependence on the bottomhole pressure during operation in AS and the diagram of the bottomhole characteristics of the formation are plotted, and the working mode is determined by the right point of intersection of the graphs of the well flow rate versus bottomhole pressure during operation in the AS and the bottomhole characteristic of the formation. According to the graph of well flow rate dependence on bottomhole pressure of the well, the well flow rate is determined at current formation and wellhead pressures. Thereafter, flow rate in the well is set equal to the value of said calculated flow rate, and further operation of the well is carried out.

EFFECT: increased efficiency of gas and gas condensate wells and increased efficiency of its operation due to provision of minimization of pressure losses at maximum increase of production capacity of gas well.

1 cl, 6 dwg