METHOD OF FORMING A WATER-GAS MIXTURE FOR PUMPING IN A PERFORMANCE WELL AND A CONTROL SYSTEM FOR ITS IMPLEMENTATION Russian patent published in 2017 - IPC E21B43/16 G05D11/00 

FIELD: oil and gas industry.

SUBSTANCE: according to the method, a gas-water mixture is formed for pumping into the injection well. This is done by means of a mixer that is connected at the inlet to the water pipeline and the gas pipeline. The mixer is made with the possibility of a controlled reduction of the inlet pressure and enabling the perturbations in the formation system of the water-gas mixture to be extinguished by the gas valve. Measuring the water and gas pressures in the water and gas lines, is made respectively, before and after the control valves and monitor the pressure differences thereon to control the flow of water or gas. Gas consumption is limited within the operating range. To do this, the resulting pressure drops are compared with a given value of the minimum pressure drop. If the actual pressure drop is greater than the preset minimum, the target water and gas flow rates continue to be maintained. If the actual pressure drop becomes equal to or less than the specified minimum differential pressure, then the control signal to the valve via the gas is applied to the valve via the gas to reduce the flow rate of the injected gas. It is supported on the control valve on the water by injecting it into the well, ensuring self-tuning of the operating mode of the well for pumping the water-gas mixture. How to implement a system to manage the process of formation of water-gas compounds for injection into an injection well.

EFFECT: achieving stabilization of water-gas injection of the mixture in the injection hole, preventing excessive wellhead pressure due to borehole gas phase.

2 cl, 2 dwg