A kind of oilfield polymer flooding whole sewage compounding treatment process

A polymer and sewage technology, which is applied in water/sewage multi-stage treatment, oxidized water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of clean water waste, pollution, and high cost of desalination, and achieve reduction Desalination treatment steps, broad application prospects, and the effect of expanding the treatment range

Active Publication Date: 2022-04-22
武汉谦豫科技有限公司
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  • 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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  • A kind of oilfield polymer flooding whole sewage compounding treatment process
  • A kind of oilfield polymer flooding whole sewage compounding treatment process
  • A kind of oilfield polymer flooding whole sewage compounding treatment process

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Example 1 uses air as the oxidant, and adopts the "pressure type micro-nano aeration sewage oxidation treatment device" (ZL201320644303.8) in the prior art for oxidation treatment. The treated sewage is added with a composite stabilizer that can inhibit corrosion and inhibit the reproduction of sulfate-reducing bacteria. The stabilizer is mainly composed of nitrite corrosion inhibitor, anthraquinone, imidazoline and thiourea. See the attached manual for the process flow figure 1 .

[0028]After being boosted by the air compressor 1-1, the air and the sewage to be treated simultaneously enter the pressure type micro-nano aeration sewage oxidation treatment device 1-2 for oxidation treatment. After treatment, the sewage is added with a compound stabilizer through the dosing device 1-3, and then enters the stabilization tank 1-4 for stabilization to remove the remaining air, and fully mixes and reacts with the stabilizer. The stabilization time is generally 2-4 hours. ...

Embodiment 2

[0030] Example 2 uses air as the oxidant, and uses a high-rate industrial sewage aeration oxidation treatment device (ZL201310669010.X) for oxidation treatment. The treated sewage is added with a composite stabilizer that can inhibit corrosion and inhibit the reproduction of sulfate-reducing bacteria. The stabilizer is mainly composed of nitrite corrosion inhibitor, anthraquinone, imidazoline and thiourea. See the attached manual for the process flow figure 2 .

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

Embodiment 3

[0033] Example 3 uses air as the oxidant, and uses a solid-state catalytic aeration oxidation tower for oxidation treatment. The treated sewage is added with a composite stabilizer that can inhibit corrosion and inhibit 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 attached manual for the process flow image 3 .

[0034] After being boosted by the fan 3-1, the air enters the solid-state catalytic aeration oxidation tower 3-2 simultaneously with the sewage to be treated for oxidation treatment. After treatment, the sewage is added with a 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 mixes and reacts with the stabilizer. The stabilization...

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Abstract

An oilfield polymer flooding sewage compounding treatment process, the invention provides a polymer tertiary oil recovery oilfield using produced sewage to prepare the polymer mother liquor and dilute injection method, that is to realize the whole sewage to prepare polymer Sewage treatment methods. In the method, the sewage is oxidized to remove the strongly reducing components, and then a water quality stabilizer capable of inhibiting corrosion and inhibiting the reproduction of sulfate-reducing bacteria is added to the water to inhibit the rebound of the reducing substances. Oxidation treatment uses air or oxygen or ozone as the oxidizing agent and is treated by aeration. The method is suitable for preparing polymers from oilfield produced water whose salinity is less than 20000mg / liter.

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 polymer flooding tertiary oil recovery oil fields, which can realize the preparation of high-viscosity polymers by completely using the sewage produced in the oil fields. Background technique [0002] Polymer flooding technology is currently the most widely used in domestic oilfields. It is one of the measures to enhance oil recovery after water flooding development, and it belongs to the category of tertiary oil recovery. The principle is to increase the viscosity of the injected liquid by adding a certain polymer to the injected water, thereby improving the oil displacement effect. Based on this principle, the key to the success of the polymer flooding process is to maintain a sufficient viscosity of the injection fluid in the surface injection system of the oil field. Ultra-high molecular weight polyacrylamide is currentl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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