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Pressurized air-multiple-phase catalyzing method with extraction waste water modification and reinjection at high-temperature in oil field

A technology for oilfield wastewater and catalysts, which is applied in chemical instruments and methods, water aeration, catalyst activation/preparation, etc., can solve problems such as high viscosity of sewage and difficulty in oil-water separation, and achieve cost-saving treatment, simple equipment, and high efficiency Effect

Inactive Publication Date: 2006-08-16
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the water produced by polymer flooding contains a considerable number of polymer molecules, the separated sewage has a high viscosity and the formed emulsified oil is relatively stable, making oil-water separation more difficult

Method used

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  • Pressurized air-multiple-phase catalyzing method with extraction waste water modification and reinjection at high-temperature in oil field
  • Pressurized air-multiple-phase catalyzing method with extraction waste water modification and reinjection at high-temperature in oil field
  • Pressurized air-multiple-phase catalyzing method with extraction waste water modification and reinjection at high-temperature in oil field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] M / MnO 2 Catalyst preparation:

[0026] Take 0.6mol / L of Mn(NO 3 ) 3 Solution 100ml, 100 grams of 40 ~ 60 mesh MnO 2 The particles were poured into the impregnating solution and stirred, placed at 85°C for 12 hours, dried at 110°C for 6 hours, then calcined at 350°C for 3 hours, and naturally cooled to room temperature to make a catalyst. The weight of the metal component in the catalyst is: Mn: 5%, the rest is the carrier MnO 2 .

Embodiment 2

[0028] Experiments on pressurized air heterogeneous catalytic modification treatment of oilfield wastewater

[0029] In the heterogeneous catalytic reactor made of stainless steel, two partitions with holes are placed in parallel, two layers of 150ml catalyst prepared according to Example 1 are filled, and water is fed by a dissolved air pump. When the gas-water ratio is 1 / 1, the catalytic reaction time of dissolved gas under pressure is 2min, the reaction temperature is 85°C, and the reaction pressure is 2kg. 4.7mg / l, SS 11.2mg / l and Fe 2+ Under the condition of 4.8mg / l, the comparison experiment of pressurized dissolved air catalysis and pressure dissolved air flotation treatment was carried out, and the results are listed in Table 1.

[0030] Table 1. Comparative experimental results of pressurized dissolved air catalysis and pressure dissolved air flotation

[0031]

[0032] It can be known from Table 1 that the high-temperature production wastewater (85°C...

Embodiment 3

[0034] Pressurized Air Heterogeneous Catalytic Pressure Condition Experiments for Oilfield Wastewater

[0035] In the heterogeneous catalytic reactor made of stainless steel, two partitions with holes are placed in parallel, and two layers of 150ml catalyst prepared according to Example 1 are filled, and water is fed by a dissolved air pump. When the ratio of aeration gas to water is 1 / 1, the catalytic reaction time of pressure dissolved air is 2min, and the reaction temperature is 85°C. l. Under the conditions of SS 11.2mg / l and Fe2+4.8mg / l, and different dissolved air pressures, the wastewater was further catalytically treated, and the results are listed in Table 2.

[0036] Table 2. Results of heterogeneous catalytic treatment of oilfield wastewater under different pressures

[0037]

[0038] From the experimental results in Table 2, it can be known that using the pressurized air heterogeneous catalytic oxidation technology to treat the polymer-containing high-temperatu...

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Abstract

A catalyst for modifying the sewage in oil field and refilling it is prepared from the active component chosen from the oxides of Fe, Ni, Mn and Cu and the carrier (SiO2 or MnO2) through immersing the carrier in the solution of soluble chloride containing metal ions or Mn(NO3)3, laying aside at 70-90 deg.C for 10-12 hr, baking, calcining and natural cooling.

Description

technical field [0001] The invention relates to the treatment of oil field production wastewater, in particular to a pressurized air-multiphase catalytic oxidation method for modified reinjection of high temperature production wastewater containing polymers in oil fields. Background technique [0002] In addition to crude oil and emulsified oil, oilfield production wastewater also contains volatile phenols, sulfides, Fe2+ and other substances, as well as chemical agents such as PAM. Considering environmental protection and saving water resources, it is the most economical and effective method for tertiary oil recovery to treat this part of sewage and use it as production water to reinject into the formation. [0003] At present, the main processes for treating and reinjecting oilfield wastewater are: coagulation air flotation separation and fine filtration. Coagulation air flotation separation technology is generally divided into three stages: mixing, flocculation, and air ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/70B01J23/889B01J37/02C02F7/00
CPCY02W10/10
Inventor 肖羽堂
Owner NANKAI UNIV
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