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Whole-sewage polymer preparing treatment process for oil field polymer flooding

A polymer and sewage technology, applied in the direction of oxidized water/sewage treatment, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as pollution, high cost of desalination, waste of clean water, etc., to achieve Reduce desalination treatment steps, broad application prospects, and reduce mining costs

Active Publication Date: 2020-03-10
武汉谦豫科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the present invention provides a treatment process for preparing polymers from produced water in oilfields with tertiary oil recovery, which can realize the preparation of polymers from all sewage in medium-low salinity oilfields, and overcome the pollution of produced wastewater, waste of clear water use, Technical problems such as high cost of desalination in sewage preparation method

Method used

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  • Whole-sewage polymer preparing treatment process for oil field polymer flooding
  • Whole-sewage polymer preparing treatment process for oil field polymer flooding
  • Whole-sewage polymer preparing treatment process for oil field polymer flooding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In Example 1, air was used as the oxidant, and the “pressure type micro-nano aerated sewage oxidation treatment device” (ZL201320644303.8) in the prior art was used for oxidation treatment. After the treatment, the sewage is added with a composite stabilizer which has the effect of inhibiting corrosion and inhibiting the reproduction of sulfate reducing bacteria. The stabilizer is mainly composed of nitrite corrosion inhibitor, anthraquinone, imidazoline and thiourea. See the manual attached for the process flow figure 1 .

[0028] After being boosted by the air compressor 1-1, the air enters the pressure type micro-nano aerated sewage oxidation treatment device 1-2 at the same time as the sewage to be treated for oxidation treatment. After the treatment, the sewage is added to the compound stabilizer through the dosing device 1-3, and then enters the stabilizer 1-4 for stabilization, to remove the remaining air, and fully mix and react with the stabilizer. The stabiliza...

Embodiment 2

[0030] In Example 2, air was used as the oxidant, and a high-rate industrial wastewater aeration oxidation treatment device (ZL201310669010.X) was used for oxidation treatment. After the treatment, the sewage is added with a composite stabilizer which has the effect of inhibiting corrosion and inhibiting the reproduction of sulfate reducing bacteria. The stabilizer is mainly composed of nitrite corrosion inhibitor, anthraquinone, imidazoline and thiourea. See the manual attached for the process flow figure 2 .

[0031] The air is boosted by the blower 2-1 and enters the high-rate industrial sewage aeration oxidation treatment device 2-2 simultaneously with the sewage to be treated for oxidation treatment. After the treatment, the sewage is added to the compound stabilizer through the dosing device 2-3, and then enters the stabilizer 2-4 for stabilization to remove the remaining air, and fully mix and react with the stabilizer. The stabilization time is generally 2-4 hours. Af...

Embodiment 3

[0033] In Example 3, air was used as the oxidant, and a solid catalytic aeration oxidation tower was used for oxidation treatment. After the treatment, the sewage is added with a composite stabilizer which has the effect of inhibiting corrosion and inhibiting the reproduction of sulfate reducing bacteria. The stabilizer is mainly composed of nitrite corrosion inhibitor, anthraquinone, imidazoline and thiourea. The solid-state catalytic aeration oxidation tower is a tower-shaped device filled with a solid-state oxidation catalyst. See the manual attached for the process flow image 3 .

[0034] The air is boosted by the blower 3-1 and enters the solid catalytic aeration oxidation tower 3-2 simultaneously with the sewage to be treated for oxidation treatment. After the treatment, the sewage is added to the compound stabilizer through the dosing device 3-3, and then enters the stabilization tank 3-4 for stabilization to remove the remaining air, and fully mix and react with the st...

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Abstract

The invention provides a method for preparing a polymer mother liquid and diluting and injecting the mother liquid after treatment by means of withdrawal sewage of an oil field of polymer tertiary oilrecovery, that is, a sewage treatment method of achieving whole-sewage preparation of the polymer. In the method, sewage is subjected to oxidization treatment to remove a strong reductive component therefrom, and a water quality stabilizer having effects of corrosion inhibition and inhibition effect on sulfate reducting bacteria reproduction is added to water, thus inhibiting the resilience of the reductive component; then oxidization is carried out with air, or oxygen and ozone being an oxidant in a manner of aeration. The method is suitable for treatment of preparing the polymer by using the oil field withdrawal sewage with mineralization degree being less than 20,000 mg / l.

Description

Technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a sewage treatment method used in a polymer flooding tertiary oil recovery oil field, which can realize the preparation of high-viscosity polymers with sewage extracted from the oil field. Background technique [0002] The polymer flooding process is currently the most widely used in domestic oilfields. It is one of the measures to improve oil recovery after water injection development and belongs to the category of tertiary oil recovery. The principle is to increase the viscosity of the injected liquid by adding a certain high molecular polymer to the injected water, thereby improving the oil displacement effect. Based on this principle, maintaining sufficient viscosity of the injected fluid in the oilfield surface injection system is the key to the success or failure of the polymer flooding process. Ultra-high molecular weight polyacrylamide is currently the po...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F103/10
CPCC02F1/72C02F5/125C02F7/00C02F2103/10
Inventor 张献波黄松白明垠康杰卿
Owner 武汉谦豫科技有限公司
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