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Low-interfacial-tension efficient oil-gas-water separation method and device

A technology of interfacial tension and separation method, which is applied in the direction of separation method, liquid separation, chemical instruments and methods, etc., can solve the problems of poor separation effect, complicated process flow, high dehydration cost and high temperature, and achieve size reduction, separation efficiency improvement, The effect of shortening the dehydration time

Pending Publication Date: 2021-02-09
BC P INC CHINA NAT PETROLEUM CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a low interfacial tension and high-efficiency oil-gas-water separation method and device, which overcomes the deficiencies of the prior art above, and can effectively solve the problems of complex technological process, dehydration cost and Problems with high temperature and poor separation effect

Method used

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  • Low-interfacial-tension efficient oil-gas-water separation method and device
  • Low-interfacial-tension efficient oil-gas-water separation method and device
  • Low-interfacial-tension efficient oil-gas-water separation method and device

Examples

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Embodiment 1

[0018]Example 1: As attachedfigure 1As shown, the low interfacial tension and high-efficiency oil-gas-water separation method is carried out according to the following steps: In the first step, the oil well gas-produced liquid mixture enters the water washing chamber A, and is pre-separated by the liquid distribution device below the water washing chamber A. The discharged gas flows above the water washing chamber A and enters the separation chamber C through the mist trapping net 13 to capture the liquid phase carried in the gas. The gas is discharged from the gas collecting bag 9 on the top of the oil chamber D; the second step is pre-separation When the discharged water-containing crude oil enters the coalescing chamber B and flows through the packing 18 in the coalescing chamber B, the fluid is forced to continuously change the velocity and flow direction, increasing the collision and coalescence probability of water droplets and water droplets, and oil droplets and oil droplets...

Embodiment 2

[0023]Example 2: As attachedfigure 1As shown, the device for implementing a low interfacial tension and high-efficiency oil-gas-water separation method includes a washing chamber A, a coalescing chamber B, a separation chamber C, and an oil chamber D. The right port of the washing chamber A is fixedly connected with the left port of the coalescing chamber B, The right port of coalescing chamber B is fixedly connected with the left port of separation chamber C, the right port of separation chamber C is fixedly connected with the left port of oil chamber D, and the liquid inlet pipe 1 is fixedly installed in the washing chamber A, and the top inlet of the liquid inlet pipe 1 extends To the outside of washing room A, the lower part of washing room A is equipped with liquid distributor 2. The bottom of liquid inlet pipe 1 is fixedly connected with the top inlet of liquid distributor 2, and the bottoms of washing chamber A, coalescence chamber B and separation chamber C are all fixed A s...

Embodiment 3

[0025]Example 3: As attachedfigure 1As shown, as an optimization of the above-mentioned embodiment 2, in-situ level gauges 7 are fixedly installed in the washing chamber A, the separation chamber C, and the oil chamber D.

[0026]According to the needs, install the in-situ level gauge 7 in the washing room A and the separation room C. On the one hand, it can automatically remind the replacement of the backwash packing 18 according to the liquid level difference, and on the other hand to prevent the gas phase from running out; install on-site in the oil chamber D Liquid level gauge 7, to prevent oil and gas in the gas phase; an oil-water interface regulator is installed in the separation chamber C to monitor the height of the oil-water interface. The height of the oil-water interface can be adjusted according to the different amount and water content of the incoming liquid to ensure the dehydration time and prevent water Emulsified oil is automatically collected in the separation chambe...

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Abstract

The invention relates to the technical field of oil-gas-water separation of petroleum and natural gas, in particular to a low-interfacial-tension efficient oil-gas-water separation method and device.According to the method, a gas-liquid mixture produced by an oil well enters a washing chamber and is pre-separated by a liquid distribution device, gas is discharged from a gas collection bag at thetop of an oil chamber, water-containing crude oil enters a coalescence chamber and flows through a hydrophilic filler, low interfacial tension is formed under the synergistic effect of a demulsifier,then the water-containing crude oil undergoes round hole rectification and parallel rectification and then enters a separation chamber for oil-water separation, separated upper-layer crude oil entersan oil chamber, produced water is discharged, an emulsion is collected and then discharged, and purified crude oil is discharged through an oil outlet. The device comprises the washing chamber, the coalescence chamber, the separation chamber and the oil chamber. According to the invention, low interfacial tension is formed through the synergistic effect of demulsification, physical coalescence, rectification and the like, so a dehydration temperature can be effectively reduced, dehydration time is shortened, separation efficiency is improved, and meanwhile the beneficial effects that an equipment size is reduced, engineering investment is reduced, operation energy consumption is reduced and oilfield development benefits are improved are achieved.

Description

Technical field[0001]The invention relates to the technical field of oil, gas and water separation of petroleum and natural gas, and is a low interfacial tension and high efficiency oil, gas and water separation method and device.Background technique[0002]At present, the main principle of oil-gas-water separation of produced fluids in domestic and foreign oilfields is gravity sedimentation separation, which uses the difference in density of oil, gas and water to separate them according to process requirements; the main principles of oil-water separation also include thermochemical dehydration, electric dehydration, centrifugal dehydration, ceramics Separation methods such as particles, thermochemistry is to use a demulsifier to adsorb on the oil-water interface film at a certain temperature to reduce the oil-water interfacial tension, thereby destroying the stability of the emulsion, changing the type of emulsion, and achieving the purpose of oil-water separation; electric dehydrati...

Claims

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Application Information

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IPC IPC(8): B01D17/025B01D17/05B01D17/04
CPCB01D17/0208B01D17/04B01D17/042
Inventor 李龙黄强夏新宇戚亚明程宏杰朱卫权张侃毅叶洋蒋程彬刁建华陶保林顾凯贾庆鹏孙士平苏艳丽
Owner BC P INC CHINA NAT PETROLEUM CORP
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