PRODUCED WATER DISCHARGE METHOD AT WELL PADS Russian patent published in 2014 - IPC B01D17/00 

FIELD: oil and gas industry.

SUBSTANCE: produced water discharge method at the well pads includes input of gas-and-water mixture containing solid suspended particles to a settling pipeline and further to an inclined tubular water separator, discharge of water from the lower section, discharge of gas and oil from the upper section of the water separator and treatment of the separated water by its input to hydrophobic oil layer of the water treatment plant with regulated boundary of water and oil phases, discharge of treated water from the water treatment plant to a pit with an electric-centrifugal pump and subsequent water pumping to an injector located at the same well pad with producers. Input of treated water to the water treatment plant is made to the water phase below the hydrophobic layer, at that before input treated water is mixed with a part of gas separated in the water separator with provision of its volume in water within the range of 0.3-0.4 unit fractions.

EFFECT: improving efficiency and degree of treatment of discharged water.

2 dwg