A method for advanced treatment of ASP flooding produced water with micro-bubbles

A ternary composite and advanced treatment technology, applied in filtration treatment, mining wastewater treatment, water/sewage treatment, etc., can solve problems such as unsatisfactory and unreachable, and achieve compact device, good effect, and small footprint of the device Effect

Active Publication Date: 2021-08-24
兰州正丰石油化工技术装备有限责任公司
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Problems solved by technology

However, it still cannot meet the requirements of polymer flooding water injection in the middle permeation layer with an oil content of 15mg/L, a suspended solid content of 15mg/L, and a particle size of susp

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  • A method for advanced treatment of ASP flooding produced water with micro-bubbles

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Embodiment Construction

[0039] The invention takes the typical ASP flooding produced water in an oilfield as the object, and the treatment capacity is 10M 3 / h, sewage density 0.998g / cm 3 , crude oil density 0.86g / cm 3 , Sewage contains oil 100-180mg / L, contains suspended matter 22-50mg / L, polymer content 1100-1300mg / L, surfactant content 122-200mg / L, viscosity 4.9-5.2mPa.S, total salinity 14800 -20500mg / L, PH value 11.8-12.2, the particle size of oil droplets and suspended solids is mainly distributed below 20μm. The three-stage treatment units of 4μm, 10μm, and 25μm air microbubbles respectively carry out mixed adsorption, coalescence and cyclone separation treatment step by step. After treatment, the water quality reaches 5mg / L of oil content, 1mg / L of suspended solids, and the particle size of suspended solids 1μm water quality standard for reinjection water.

[0040] Below, in conjunction with accompanying drawing, technical scheme of the present invention is described further:

[0041] A te...

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Abstract

The present invention relates to a method for deep treatment of produced water of ASP flooding with micro-bubbles. The method comprises the steps of sewage filtration to remove suspended solids ≥ 40 μm; electromagnetic anti-scaling; generation of micro-bubbles, mixing of micro-bubbles and water, and pressurization of sewage jets. , Suspension of oil droplets and microbubble coalescence, cyclone separation as a treatment unit, according to the microbubble particle size <4μm, <10μm, <25μm, <60μm, respectively generated and used, the sewage treatment is divided into corresponding The processing units are processed step by step from small to large. The microbubbles of each level of treatment unit occur at this level; the microbubbles mix and coalesce with the oil beads and suspended particles; the hydrocyclone separates the oil-water cyclone; the invention uses mechanical or physical methods to treat sewage, which is technically economical Good performance, safety and environmental protection, suitable for advanced treatment of ASP flooding produced water, polymer flooding produced water, heavy oil produced water, also suitable for the treatment of other similar sewage containing fine suspended solids, highly emulsified and high viscosity.

Description

technical field [0001] The invention relates to the treatment of the produced water of the three-element compound flooding, in particular to a method for deeply treating the produced water of the three-element compound flooding with micro-bubbles. The method can also be applied to the treatment of polymer flooding produced water, heavy oil produced water or other similar sewage containing fine oil droplets and suspended matter, highly emulsified and high viscosity. Background technique [0002] At present, all oilfields are gradually adopting polymer flooding technology in order to further enhance oil recovery, and are developing towards ASP flooding. Compared with polymer flooding, ASP flooding adds strong alkaline surfactants. Under the action of multiple chemical agents, the emulsification strength of the produced fluid is stronger, the interface properties become more complicated, the solid content of suspended solids increases, the particle size becomes finer, and oil-...

Claims

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Application Information

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IPC IPC(8): C02F9/12C02F103/10C02F101/32
CPCC02F1/001C02F1/24C02F1/385C02F1/40C02F5/00C02F9/00C02F2101/32C02F2103/10C02F2201/48C02F2209/10
Inventor 裘淮捷裘速超
Owner 兰州正丰石油化工技术装备有限责任公司
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