Treatment process for gas field foam water up-to-standard discharge

A treatment process, bubble drainage technology, applied in water/sewage treatment, mining wastewater treatment, water treatment parameter control, etc., can solve the problem of severe foaming, achieve the effect of reducing foaming and reducing dosage

Inactive Publication Date: 2017-01-25
SICHUAN YANGSEN PETROLEUM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, thermal separation technology is widely used in the standard treatment of high-salt gas field water, but the formation water of foam drainage and gas production contains betaine surfactants, which has serious foaming properties, and this type of water cannot directly enter the thermal separation system, so Developing an effective foam drainage gas recovery formation water pretreatment and defoaming technology is the key to the current standard management of foam drainage

Method used

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  • Treatment process for gas field foam water up-to-standard discharge
  • Treatment process for gas field foam water up-to-standard discharge
  • Treatment process for gas field foam water up-to-standard discharge

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A treatment process for gas field bubble drainage up to standard discharge, the manufacturing process is as follows:

[0035](1) Oil separation treatment

[0036] Because there is a lot of oil floating on the surface of the waste water (bubble drainage), it is necessary to carry out oil separation treatment in advance. The specific process is: collect the waste water to be treated and add it to the oil separation tank, let it stand for 20 minutes, open the side valve to let the waste water flow out by itself , to trap the surface oil layer.

[0037] (2) Demulsification treatment

[0038] Add a demulsifier to the waste water after the oil separation treatment to separate the emulsified oil in the waste water, and then carry out the oil separation treatment again after separation.

[0039] In this step, the demulsifier is an AR-type demulsifier, and the AR-type demulsifier is a novel oil-soluble non-ionic demulsifier formed by the polymerization of alkylphenol-formaldeh...

Embodiment 2

[0060] A treatment process for gas field bubble drainage up to standard discharge, the manufacturing process is as follows:

[0061] (1) Oil separation treatment

[0062] Collect the waste water to be treated (soak and drain) and add it to the oil trap, let it stand for 20 minutes, open the side valve to let the waste water flow out by itself, and trap the oil layer on the surface.

[0063] (2) Demulsification treatment

[0064] Add AR type demulsifier with HLB value of 4 to the waste water after oil separation treatment. The amount of AR type demulsifier added is 5mg / L, so that the emulsified oil in the waste water is separated, and after separation, oil separation treatment is carried out again.

[0065] (3) Water quality adjustment treatment

[0066] A saturated sodium hydroxide solution with a concentration of 4.5 mol / L is added to the waste water after the demulsification treatment, and the pH value of the waste water is adjusted to 8-9.5.

[0067] (4) Coagulation trea...

Embodiment 3

[0080] A treatment process for gas field bubble drainage up to standard discharge, the manufacturing process is as follows:

[0081] (1) Oil separation treatment

[0082] Collect the waste water to be treated (soak and drain) and add it to the oil trap, let it stand for 20 minutes, open the side valve to let the waste water flow out by itself, and trap the oil layer on the surface.

[0083] (2) Demulsification treatment

[0084] Add an AR-type demulsifier with an HLB value of 8 to the wastewater after the oil-separation treatment. The amount of the AR-type demulsifier added is 2 mg / L to separate the emulsified oil in the wastewater, and then perform oil-separation treatment again after separation .

[0085] (3) Water quality adjustment treatment

[0086] A saturated sodium hydroxide solution with a concentration of 4.5 mol / L is added to the waste water after the demulsification treatment, and the pH value of the waste water is adjusted to 8-9.5.

[0087] (4) Coagulation tr...

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Abstract

The invention discloses a treatment process for gas field foam water up-to-standard discharge. The treatment process comprises the following procedures: performing oil isolation treatment, performing demulsification treatment, performing water quality conditioning treatment, performing coagulation treatment, performing synergic oxidation treatment, performing complexing coagulantion enhancement treatment, performing softening treatment, performing falling film/forced circulation evaporation crystallization treatment, and finally performing up-to-standard discharge on obtained condensed water. By adopting the treatment process, low-cost up-to-standard discharge treatment on various types of high-salt foam water can be achieved.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a treatment process for gas field bubble drainage up to standard discharge. Background technique [0002] Gas field water is formation water with high salinity produced during the process of natural gas exploitation, and the quality and quantity of gas field water vary greatly in different gas-producing layers and gas production stages of gas wells. The composition of gas field water is complex, dark in color and accompanied by strong stench. It mainly contains high pollutants such as hydrogen sulfide, oil, chloride, suspended matter, mineral salt and organic matter. [0003] In the middle and late stages of gas field development, formation pressure decreases, edge and bottom water advance, and operations such as fracturing and acidification are implemented, resulting in fluid accumulation at the bottom of the well and in the wellbore, reducing natura...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F103/10
CPCC02F1/041C02F1/048C02F1/40C02F1/5245C02F1/5281C02F1/56C02F1/66C02F1/72C02F9/00C02F2001/425C02F2103/10C02F2209/055C02F2209/06C02F2209/08C02F2209/10C02F2209/14
Inventor 祁向清邹德军
Owner SICHUAN YANGSEN PETROLEUM TECH CO LTD
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