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

A technology for oil extraction wastewater and treatment methods, applied in biological water/sewage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc., can solve the problems of restricting the efficiency of obligate microorganisms and long treatment residence time, and achieve Reduce the treatment process and residence time, reduce the energy consumption of aeration, and achieve the effect of complete degradation

Active Publication Date: 2012-12-05
JIANGSU BODA ENVIRONMENTAL PROTECTION
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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] Embodiment 1: see Figure 2-5 , the surface of the present invention is used for contact oxidation with fiber silk cloth sheet suspension packing, which is composed of synthetic fiber cloth sheet 2 and fiber silk 1 uniformly distributed on both sides; the combined semi-soft suspension packing is composed of middle plastic clip ring 4 and uniform inner and outer circumference The distributed fiber filaments 3 and 6 form a sheet structure, which is composed of a central rope 5 connected in series. Both have a relatively high density, which is beneficial to increase the contact time between the treated water and the filler and prevent short flow.

[0029] 2: The influent water is the effluent from a down tank in an oil field, the sewage index (average value): oil content 300 mg / l, SS565 mg / l. Adopting the process of the present invention, microbial contact oxidation+biological aeration filter+membrane separation (average pore size 100 Nm). Wherein the filler of the conta...

Embodiment 3

[0030] Embodiment 3: basically the same as embodiment 2, wherein the contact oxidation filler adopts the combined semi-soft suspension filler of example 1, and vertical partitions are arranged alternately in the reaction tank, wherein the filler and the filter material are not mainly active enzymes and proteases. Potassium, sodium, phosphorus, magnesium, calcium, amino acid and other trace elements immersion treatment, only the treatment time is prolonged relative to Example 2, which is 5+3h, a total of 8h, and the treatment result is 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 present invention is an improvement on the low-permeability / ultra-low-permeability oilfield sewage reinjection treatment method, especially an improvement on the applicant who first applied for patent CN03112720.7. Background technique [0002] Most of my country's oil reservoirs are low-permeability and ultra-low-permeability oilfields. With the gradual aging of conventional oil reservoirs, waterflooding production of low-permeability and ultra-low-permeability reservoirs not only consumes a lot of water resources, but also produces a huge amount of sewage (greater than oil production). Oilfield wastewater has high suspended solids (50-700mg / l), high oil content (20-300mg / l), high salt content (salinity up to 150000mg / l), complex oil content (both slick oil and Dispersed oil, emulsified oil), organic components are complex and difficult to degrade (in addition to crude oil, it also contains fatty acids, surfactants, oil displacing agents, demulsi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N1/20C02F3/34C02F3/12
CPCY02W10/10
Inventor 王娅娜王海君
Owner JIANGSU BODA ENVIRONMENTAL PROTECTION
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