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Method and device for controlling viscosity loss of oil extraction waste water blended polymer

A technology of oil extraction sewage and viscosity loss, applied in the direction of oxidized water/sewage treatment, etc., can solve the problem of large loss of solution viscosity, and achieve the effect of increasing the oxygen content of the water body, reducing the viscosity loss, and ensuring the polymerization viscosity

Inactive Publication Date: 2012-11-21
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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  • Method and device for controlling viscosity loss of oil extraction waste water blended polymer
  • Method and device for controlling viscosity loss of oil extraction waste water blended polymer
  • Method and device for controlling viscosity loss of oil extraction waste water blended polymer

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Embodiment 1

[0041] Adopt the method and the device of the present invention to control the viscosity loss of the mixed polymer solution of oil production sewage to carry out a confidentiality test, use the polymer flooding oil production sewage as raw water, and take the flow rate as 12m 3 / h is pumped into the vertical water collection tank 1, and the first step to the fifth step of the present invention is carried out, and by the first stage test of the technical solution of the present invention, it is 12m to obtain the inflow flow 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. The relationship between 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 rate, m 3 / h;

[0044] P——Oxygen exposure pressure, MPa;

[0045] t——oxygen exposure time, second;

[0046] D. O ——The best dissolved oxygen content in water,...

Embodiment 2

[0054] Use polymer flooding oil production sewage as raw water, with a flow rate of 25m 3 / h is pumped into the vertical water collection tank 1, and the first step to the fifth step of the present invention is carried out, and by the first stage test of the technical solution of the present invention, it is 25m to obtain the influent flow 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 corresponding influent flow rate and oxygen exposure pressure, The relation between oxygen exposure time, its relation also satisfies the description in embodiment 1, wherein in the present embodiment D O =6.48mg / L.

[0055] Using the optimal oxygen content of the sewage system determined in the first stage above as 6.48mg / L as a guide, the water flow rate to the vertical water collection tank is 25m 3 / h pumped into the oil production sewage, the oxygen exposure pressure was 0.22MP...

Embodiment 3

[0059] Use polymer flooding oil production sewage as raw water, with a flow rate of 18m 3 / h is pumped into the vertical water collecting tank 1, and the first step to the fifth step of the present invention is carried out, and by the first stage test of the technical solution of the present invention, it is 18m to obtain the inflow flow 3 / h, oxygen exposure pressure 0.18MPa, and oxygen exposure time 10 seconds, the optimal oxygen content of the sewage system is 6.70 mg / L, and the corresponding influent flow rate and oxygen exposure pressure, The relation between oxygen exposure time, its relation also satisfies the description in embodiment 1, wherein in the present embodiment D O =6.70mg / L.

[0060] Using the optimal oxygen content of the sewage system determined in the first stage above as 6.70mg / L as a guide, the water flow rate to the vertical water collecting tank is 18m 3 / h pumped into the oil production sewage, the oxygen exposure pressure was 0.18MPa, and the oxyg...

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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 technique of diluting the polymer mother liquor with produced sewage in the tertiary oil recovery polymer flooding surface technology, and specifically relates to a method and device for controlling the viscosity loss of mixed polymers in the oil recovery sewage. 2. Background technology: [0002] As oilfield development enters a period of high water cut, the amount of sewage produced in the surface system is increasing year by year. According to the water quality control indicators suitable for injection water in formations with different permeability, it has become the current practice to carry out corresponding treatment and reinjection of such sewage The best solution for comprehensive treatment of oilfield wastewater. Similarly, in the EOR polymer flooding development block, in order to save precious water resources, the study applied the use of produced sewage to dilute the polymer mother liquor to complete single...

Claims

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Application Information

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Patent Type & Authority Patents(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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