METHOD FOR OPERATING GAS WELLS AT LATER STAGE OF NATURAL GAS FIELD DEVELOPMENT AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2021 - IPC E21B43/12 E21B43/40 

FIELD: gas fields development.

SUBSTANCE: method for operating gas wells at a late stage in the development of natural gas fields is claimed. The method includes the production of a gas-liquid mixture from wells. Separation of free gas from liquid and its subsequent supply to the inlet of the mixing chamber of the jet apparatus, which reduces the wellhead pressure of gas wells and increases the actual flow rate of the produced gas-liquid mixture from the bottom of the well. A high-pressure flow for ejection of a low-pressure gas is created with a water-methanol solution, which is used in the recirculation mode. The captured produced gas is separated in the first section of the bullet due to centrifugal and gravitational forces and is directed through the gas pipeline-loop to the complex gas treatment unit. Part of this gas is sampled, which is periodically pumped into the annulus of individual production wells to remove the accumulated column of liquid from their tubing. The selection of tubing is carried out by the APCS according to the values of the parameters controlled by its telemechanics system at the wellheads, which make it possible to identify the wells that require this operation. The degassed liquid released in the separator is sent to the second section of the bullet, from which it is pumped back into the field formation below the level of the gas-water contact through the least productive or inactive well of the cluster. The well has the maximum distance from the bottom of other wells in the cluster. Also claimed is a device for implementing the method.

EFFECT: increasing (maintaining) the production rate of wells, ensuring stable technological modes of well operation at the final stage of the development of gas fields, increasing the gas recovery factor, as well as expanding the field of application of jet devices in gas production.

2 cl, 1 dwg