SELECTION OF THE OPTIMAL METHOD OF OPERATION FOR GAS-LIFT WELLS OPERATING IN OFFSHORE CONDITIONS AND EVALUATION OF ITS EFFICIENCY

Abstract

As the field is developed, the operating conditions of the wells deteriorate; the product is hydrated, the hydrostatic pressure of the fluid column increases, a high-viscosity emulsion is formed, the pressure loss due to friction in the wellbore and discharge line increases, which increases the wellbore and wellhead pressures, the effective gas factor decreases, and the required specific gas consumption increase. When gas is supplied to the pipe space through compressors, the liquid level decreases and increases in the pump-compressor pipes. When the liquid level reaches the shoe as a result of gas supply, the gas-liquid mixture enters the pump-compressor pipes and mixes with the liquid. As a result, the density of such a gas-liquid mixture is less than the density of the liquid entering the formation, and the level of the liquid in the pump-compressor pipes rises. The more gas is supplied, the lower the density of the mixture, and the higher the mixture. In the case of continuous supply of compressed gas to the well, the gas-liquid mixture rises to the mouth of the well. After the gas-gas mixture is removed from the well, a new amount of liquid enters the well from the formation. Production of a gas lift well - the amount of gas injected, the depth of unloading of the pump-compressor pipes (submersible depth), the diameter of the lifting pipes, the viscosity of the liquid, etc. depends on factors.. Keywords: Gas-lift, optimal operating mode, well, well pressure, compressor, pipe