A method and device for controlling the viscosity loss of mixed polymers in oil extraction wastewater

A technology for oil production sewage and viscosity loss, applied in the direction of oxidized water/sewage treatment, etc., can solve the problem of large solution viscosity loss, achieve the effects of increasing contact area, reasonable reuse, and ensuring accuracy

Inactive Publication Date: 2011-12-14
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] One object of the present invention is to provide a kind of method of controlling the viscosity loss of the mixed polymer of oil production sewage, another purpose of the present invention is to provide the device used in the method for controlling the viscosity loss of the mixed polymer of oil production sewage, it is used to solve existing The problem of large viscosity loss of polymer solution prepared by sewage in technology

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  • A method and device for controlling the viscosity loss of mixed polymers in oil extraction wastewater
  • A method and device for controlling the viscosity loss of mixed polymers in oil extraction wastewater
  • A method and device for controlling the viscosity loss of mixed polymers in oil extraction wastewater

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Embodiment 1

[0041] The method and device for controlling the viscosity loss of the mixed polymer solution of the oil extraction wastewater of the present invention were used for confidentiality tests. The polymer flooding oil extraction wastewater was used as the raw water, and the flow rate was 12m. 3 / h Pump into the vertical water collection tank 1, and carry out the first to fifth steps of the present invention. Through the first stage test of the technical scheme of the present invention, the influent flow rate is 12m 3 / h, the oxygen exposure pressure is 0.15MPa, and the oxygen exposure time is 7 seconds, the optimal oxygen content of the sewage system is 6.50mg / L, and the fitting establishes the corresponding inlet water flow and oxygen exposure pressure when the optimal oxygen content is reached. The relationship between the oxygen exposure time is:

[0042] Q=0.21×32×3600×10 6 ×k×P / (8.314×298×D O ×t)

[0043] In the formula: Q——influent flow, m 3 / h;

[0044] P-oxygen exposure pressure,...

Embodiment 2

[0056] Use polymer flooding oil production wastewater as raw water, with a flow rate of 25m 3 / h Pump into the vertical water collection tank 1, and carry out the first to fifth steps of the present invention. Through the first stage test of the technical scheme of the present invention, the influent flow rate is 25m 3 / h, the oxygen exposure pressure is 0.22MPa, and the oxygen exposure time is 15 seconds, the optimal oxygen content of the sewage system is 6.48mg / L, and the fitting is established when the optimal oxygen content is reached, the corresponding inlet water flow and oxygen exposure pressure, The relationship between the oxygen exposure time, the relationship also meets the description of embodiment 1, wherein in this embodiment D O =6.48mg / L.

[0057] Using the optimal oxygen content of the sewage system determined in the first stage above to be 6.48mg / L as a guide, the vertical water collection tank with an inlet flow of 25m 3 / h is pumped into the oil production waste...

Embodiment 3

[0062] Use polymer flooding oil production wastewater as raw water, with a flow rate of 18m 3 / h Pump into the vertical collecting tank 1, and carry out the first to fifth steps of the present invention. Through the first stage test of the technical scheme of the present invention, the influent flow rate is 18m 3 / h, the oxygen exposure pressure is 0.18MPa, and the oxygen exposure time is 10 seconds, the optimal oxygen content of the sewage system is 6.70mg / L, and the fitting is established when the optimal oxygen content is reached, the corresponding inlet water flow and oxygen exposure pressure, The relationship between the oxygen exposure time, the relationship also meets the description of embodiment 1, wherein in this embodiment D O =6.70mg / L.

[0063] Using the optimal oxygen content of the sewage system determined in the first stage above to be 6.70mg / L as a guide, the vertical water collection tank with an inlet flow of 18m 3 / h is pumped into the oil production wastewater,...

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Abstract

The invention relates to a method and a device for controlling the viscosity loss of an oil extraction waste water blended polymer. The method for controlling the viscosity loss of the oil extraction waste water blended polymer comprises: pumping oil extraction waste water into a vertical water collection tank by using a frequency-variable and speed-adjustable vortex pump, and at the same time, compressing the air into the vertical water collection tank to aerate oil extraction waste water in the vertical water collection tank; recording aeration time, monitoring the water content in an action time of the incoming water flow by using a dissolved oxygen tester jointed with a water discharge pipe, working out the variation relationship under a certain flow rate among an aeration pressure, an aeration time and oxygen content in treated water, and determining the optimal oxygen content of a waste water system; and under the guidance of the flow rate, pressure and time parameters corresponding to the optimal oxygen content, pumping the oil extraction waste water into the vertical water collection tank for aeration, and diluting mother solution of a polymer by using the aerated waste water. In the invention, the problem of vague reasonable oxygen content definition of waste water treated by an aeration technique is solved scientifically and effectively, and the method and the devicehave high operability and practicality.

Description

1. Technical Field: [0001] The invention relates to the technology of tertiary oil recovery polymer flooding surface technology, using the produced sewage to dilute the polymer mother liquor technology, and specifically relates to a method and device for controlling the viscosity loss of the mixed polymer of the oil production sewage. 2. Background technology: [0002] As oilfield development enters a period of high water cut, the amount of produced sewage in the surface system is increasing year by year. According to the quality control index of injected water suitable for formations with different permeability, the corresponding treatment and reinjection of this type of sewage have become current The best plan for comprehensive treatment of oilfield produced wastewater. Similarly, in the tertiary oil recovery polymer flooding development block, in order to save precious clean water resources, the research and application of the production sewage to dilute the polymer mother liq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72
Inventor 刘扬王志华钟会影魏立新庞仁山
Owner NORTHEAST GASOLINEEUM UNIV
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