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Hyposmosis/super-hyposmosis oil extraction sewage reinjection method in oil field

A technology for oil extraction sewage and treatment method, which is applied in biological water/sewage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc. The effect of reducing the treatment process and residence time, reducing the energy consumption of aeration, and low suspended solids in the effluent

Active Publication Date: 2011-02-16
JIANGSU BODA ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The above-mentioned treatment with obligate microorganisms for degreasing and degrading organic matter also has a common deficiency. Biological degreasing bacteria and bacteria degrading organic matter are mixed in one process section, which may be due to the lack of synergy between each other, which limits the efficiency of obligate microorganisms and also leads to One reason for the long dwell time

Method used

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  • Hyposmosis/super-hyposmosis oil extraction sewage reinjection method in oil field
  • Hyposmosis/super-hyposmosis oil extraction sewage reinjection method in oil field
  • Hyposmosis/super-hyposmosis oil extraction sewage reinjection method in oil field

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Embodiment 1

[0028] Example 1: see Figure 2-5 , the surface for contacting oxidation of the present invention has a fiber cloth sheet suspension filler, which is composed of a synthetic fiber cloth sheet 2 and a fiber thread 1 evenly distributed on both sides; the combined semi-soft suspension filler is composed of a middle plastic clip ring 4 and a uniform inner and outer perimeter. The distributed fiber filaments 3 and 6 form a sheet-like structure, which is composed of central ropes 5 connected in series. Both have relatively high density, which is beneficial to improve the contact time between the treated water and the filler and prevent short flow.

Embodiment 2

[0029] Example 2: The influent is the effluent from the descending tank of an oil field, and the sewage index (average value): oil content 300 mg / l, SS 565 mg / l. By adopting the process of the present invention, microbial contact oxidation + biological aeration filter + membrane separation (average pore diameter 100Nm). Among them, the contact oxidation reaction tank filler adopts Example 1 with a fiber cloth sheet hanging on the surface, and the filler has a filling density of 80V / V% in the tank. The microorganisms are: Zoogloeasp (Zoogloeasp), Bacillus cereus (Bacillus cereus), Pseudomonas alcaligenes (Pseudomonasalcaligenes) combination bacteria. The biological aeration filter adopts the applicant's previous patent application CN200620077234.7 with an internal circulation recirculation process. The bacteria on the surface of the filter material are: Brachybacterium collins, Bacillus licheniformis, Bacillus subtilis Bacillus subtilis (Bacillus subtilis), Pseudomonas (Pseudo...

Embodiment 3

[0030] Example 3: Basically the same as Example 2, wherein the contact oxidation filler adopts the combined semi-soft suspension filler of Example 1, and vertical partitions are arranged in the reaction tank, wherein the filler and filter material do not use protease-based active enzymes and Potassium, sodium, phosphorus, magnesium, calcium, amino acid and other trace elements dipping treatment, but the treatment time is longer than that of example 2, 5+3h, a total of 8h, the treatment results are basically the same as example 2.

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Abstract

The invention relates to an improved hyposmosis / super-hyposmosis oil extraction sewage reinjection method in an oil field, which is characterized in that a combination strain of Zoogloea sp, Bacillus cereus and Pseudomonas alcaligenes mainly for removing oil and a combination strain of Brachybacteriumcollins Bacillus licheniformis Bacillus subtilis and Pseudomons sp for mainly degrading organic pollutants are respectively attached in an aerobic pool, and suspension filling with density of 65-85V / V% and / or separatly arranged suspension filling and biological aerated filter filling are filled and treated in sequence, wherein a separation membrane is a fiber membrane or vacuum membrane or gas stripping membrane or vibration membrane meeting the requirement on filtration, and the fine filtration is diatomite filtration. The synergistic effect of the process greatly improves the preprocessing effect to ensure that the follow-up membrane separation can adopt conventional economic separation treatment such as the hollow fiber membrane or vacuum membrane or gas stripping membrane or vibration membrane, or adopt the diatomite filtration. Compared with the prior art, the invention has the advantages of short treatment period and low investment and treatment cost.

Description

technical field [0001] The invention is an improvement to the low-permeability / ultra-low-permeability oilfield sewage reinjection treatment method, especially an improvement to the applicant's first application for patent CN03112720.7. Background technique [0002] Most of my country's oil reservoirs are low permeability and ultra-low permeability oil fields. With the gradual aging of conventional oil reservoirs, water flooding in low-permeability and ultra-low-permeability reservoirs not only consumes a lot of water resources, but also produces a large amount of wastewater (greater than oil production). Oilfield produced sewage has high suspended solids (50-700mg / l), high oil content (20-300mg / l), high salt content (salinity up to 150,000mg / l), and complex oil (both oil slick and Dispersed oil, emulsified oil), the organic composition is complex and difficult to degrade (in addition to crude oil, it also contains fatty acid, surfactant, oil displacement agent, demulsifier,...

Claims

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Application Information

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IPC IPC(8): C02F3/12C02F3/34
CPCY02W10/10
Inventor 王娅娜王海君
Owner JIANGSU BODA ENVIRONMENTAL PROTECTION
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