Separating device for extracting reinjection water from high-water-content oil well produced liquid

Abstract

The invention discloses a separating device for extracting reinjection water from high-water-content oil well produced liquid. The separating device comprises a rotating cylinder and a shell. The rotating cylinder can be driven by a motor and a rotating shaft to rotate in the shell, the rotating cylinder is internally provided with an impeller, a main separating wheel, an oil discharging disc, a flow-guiding wheel, a water blocking wheel and a drainage disc, and the impeller, the main separating wheel, the oil discharging disc, the flow-guiding wheel, the water blocking wheel and the drainage disc partition the rotating cylinder into a liquid inlet rotating acceleration section, a main separating section, an oil discharging section, an oil-in-water emulsion secondary separating section and a drainage section; and after the oil well produced liquid entering the rotating cylinder from the shell is separated, water is drained into a drainage pipeline from the shell through the drainage disc and can be directly input into a reinjection water pipeline, separated oil or a high-oil-content oil-water mixture is input into an oil discharging pipeline from the shell through the oil discharging disc, and separated gas is input into a gas discharging pipeline from the shell. The separating device can meet the requirements for an oil delivery pipeline, a part of water extracted from the high-water-content oil well produced liquid and having the good water quality indexes is used for in-situ reinjection, and in-situ treatment and in-situ reinjection of the oil well produced liquid are realized.

Description

technical field [0001] The invention relates to in-situ treatment equipment for oil well production fluid in the petroleum industry, in particular to a separation device for extracting reinjection water from high water content oil well production fluid. Background technique [0002] As the oilfield exploitation enters a period of high water cut, the water cut of the produced liquid continues to rise and has reached 80%-98% at present. On the one hand, this increases the burden on the production liquid transportation system and downstream processing equipment. On the other hand, because the reservoir needs a large amount of water injection, the water after centralized treatment at the downstream joint station must be transported to the injection site through a long-distance pipeline network. Wells, which inadvertently form a long-distance water roaming cycle, which not only consumes a lot of heat and electricity, but also causes the problem of poor compatibility between reinj...

AI Technical Summary

Problems solved by technology

Since there is no special separation mechanism for the oil-in-water emulsion in the existing separator, it is impossible for this layer of emulsion containing more oil to cross the oil-water interface and enter the oil-distributing channel, and it will be discharged from the separator with the oil. Continuously accumulate in situ until it diffuses into the water body, resulting in an increase in the oil content in the effluent, which cannot meet the water quality requirements for oil field injection

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