Oil-water pre-separation device and treatment method based on oilfield associated gas from air flotation

An oil-water separation device and oilfield associated gas technology, which is applied in the treatment of hydrocarbon oil, mechanical dehydration/demulsification, petroleum industry, etc., can solve the problems of long separation time, low efficiency, small application range, etc., and achieve great market potential , broad application prospects, and the effect of reducing investment costs

Active Publication Date: 2022-04-08
BC P INC CHINA NAT PETROLEUM CORP +3
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Problems solved by technology

[0003] The present invention provides a self-air flotation oil-water pre-separation device and treatment method based on oilfield associated gas, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the long separation time of existing oil-water separation devices that use gravity sedimentation separation , the problem of low efficiency and the problem of small application range of some centrifugation and cyclone separation limited by the amount of incoming liquid

Method used

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  • Oil-water pre-separation device and treatment method based on oilfield associated gas from air flotation
  • Oil-water pre-separation device and treatment method based on oilfield associated gas from air flotation

Examples

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Embodiment 1

[0018] Embodiment 1: as attached figure 1 As shown, the self-air flotation oil-water pre-separation device based on oilfield associated gas includes a tank body. The inside of the tank body is divided into interconnected pretreatment chamber 1, gravity sedimentation separation chamber 2 and crude oil buffer chamber 3 from left to right. Between the treatment chamber 1 and the gravity sedimentation separation chamber 2, a baffle plate 10 is arranged to communicate with the upper and lower parts of the pretreatment chamber 1 and the gravity sedimentation separation chamber 2 respectively. The front and rear inner walls of the left part are fixedly installed together. The lower part of the pretreatment chamber 1 is fixedly equipped with a liquid distribution device. The tank body is provided with a liquid inlet pipe 9 communicating with the liquid distribution device. A liquid level stabilizing device 12 is installed in the pretreatment chamber 1 beyond the baffle plate 10, and t...

Embodiment 2

[0034] Example 2: The treatment method based on the oilfield associated gas self-air flotation oil-water pre-separation device uses the associated gas flotation in the oil well produced fluid to separate the tiny oil droplets that could not be separated by gravity settlement, and press The above method is carried out: the oilfield production fluid enters the liquid distribution main pipe 6 of the liquid distribution device from the liquid inlet pipe 9 on the top of the tank body, enters the pretreatment chamber 1 through the liquid outlet 11 on the liquid distribution branch pipe 7, and the production fluid The associated gas escapes from the liquid and carries crude oil with low density to float up to realize pre-separation. When the liquid level exceeds the baffle 10, it turns over the baffle 10 and enters the gravity sedimentation separation chamber 2, and the oil-water separation device 14 realizes the separation. For further oil-water separation, the oil layer is on the to...

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Abstract

The invention relates to the technical field of oil-water separation of oil well production fluid, and is an oil-water pre-separation device and treatment method based on oilfield associated gas self-floating oil and water. chamber, the gravity sedimentation separation chamber and the crude oil buffer chamber, and a baffle plate 1 is arranged between the pretreatment chamber and the gravity sedimentation separation chamber to respectively connect the upper part and the lower part of the pretreatment chamber and the gravity sedimentation separation chamber. The invention fully utilizes the associated gas in the oil well production fluid as the air flotation gas source, accelerates the separation of crude oil and produced water, and then realizes the uniform escape of the associated gas in the liquid phase through the liquid distribution device, forming an effective air flotation Use this function to reduce the size of the equipment, reduce the investment cost, improve the efficiency of oil-water separation and achieve the expected separation effect without setting up external facilities. It has broad application prospects and great market potential.

Description

technical field [0001] The invention relates to the technical field of oil-water separation of oil well production fluid, and relates to a self-air flotation oil-water pre-separation device and treatment method based on oil field associated gas. Background technique [0002] At present, the oil-water separation of oilfield production fluids at home and abroad mainly adopts gravity sedimentation or centrifugation, cyclone separation and other methods. Before oil-water separation, the associated gas in the production fluid is separated. Generally, gravity sedimentation or centrifugation and cyclone separation methods are used for separation, and oil and water are required to have a certain density difference. The disadvantages of gravity sedimentation are long time, low separation efficiency, and large volume of equipment. Centrifugal and cyclone separation The disadvantage is that it is greatly affected by the change of incoming liquid volume, and its application is limited t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G33/06
CPCC10G33/06C10G2300/1033C10G2300/208
Inventor 戚亚明黄强吴昊王立龙张斌樊军张侃毅李龙蒋旭刁建华严文强贾庆鹏王超苏朋龙王昱培
Owner BC P INC CHINA NAT PETROLEUM CORP
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