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Process for evaluating polymer-containing sewage diluted polymer solution by clear water preparation and oxygen exposure treatment

A technology of polymer solution and polymer, applied in the field of oilfield produced water treatment

Inactive Publication Date: 2020-06-23
DAQING OILFIELD CO LTD +2
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] At present, there are no reports on the evaluation process of clear water preparation and oxygen exposure treatment of diluted polymer solution in polymer-containing sewage

Method used

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  • Process for evaluating polymer-containing sewage diluted polymer solution by clear water preparation and oxygen exposure treatment

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Embodiment 1

[0019] Such as figure 1 As shown, the evaluation process of clear water preparation and oxygen exposure treatment of diluted polymer solution in polymer-containing sewage was implemented in the Nansi Combined Station of the Second Oil Production Plant of Daqing Oilfield Co., Ltd., with a treatment capacity of 1.0m 3 / h, the concentration of the polymer mother liquor is 5000mg / L, and the polymer mother liquor is diluted to 1000mg / L by exposure to oxygen-containing sewage.

[0020] 1. Air compressor oxygen exposure + diluted polymer

[0021] The air is compressed by the air compressor and enters the air storage tank to stabilize the pressure. The stabilized air is directly mixed with the poly-containing sewage in the air-water static mixer. After being released by the dissolved air release tank for 4 hours, it enters the external water tank for external transport. The polymer-containing sewage in the water tank is fully mixed with the polymer mother liquor in the polymer mother...

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Abstract

The invention relates to the technical field of oilfield produced water treatment, in particular to a process for evaluating a polymer-containing sewage diluted polymer solution by clear water preparation and oxygen exposure treatment. The evaluation process comprises the following steps: a, evaluating three oxygen exposure processes by adopting a series connection mode of an oxygen exposure process (air compressor oxygen exposure, ejector oxygen exposure and improved oxygen exposure) and a polymer dilution process; b, an oxygen aeration process: respectively carrying out air compressor oxygenaeration, ejector oxygen aeration and improved oxygen aeration treatment on the polymer-containing sewage by adjusting the gas-water ratio; and c, a polymer dilution process: fully mixing the polymer-containing sewage in the output water tank with the polymer mother liquor in the polymer mother liquor tank at the static mixer. According to the evaluation process, through the water quality of thetreated polymer-containing sewage and the viscosity of a diluted polymer solution, the application effects of an air compressor oxygen exposure process, an ejector oxygen exposure process and an improved oxygen exposure process are compared and evaluated, and the optimal oxygen exposure mode and optimal oxygen exposure process parameters are optimized.

Description

technical field [0001] The invention relates to the technical field of oilfield produced water treatment, in particular to an evaluation process for clear water preparation and oxygen exposure treatment of polymer-containing sewage diluted polymer solution. Background technique [0002] In the polymer flooding process, polymer-containing sewage is generally used to dilute the polymer mother liquor, and the polymer solution formed is used to displace oil. Oxygen treatment of polymer-containing wastewater for dilution can improve the water quality of polymer-containing wastewater, reduce the viscosity loss of polymer solution, and reduce the amount of dry polymer powder, thereby improving the development benefits of oil fields. [0003] At present, there are two oxygen aeration processes for the oxygen aeration station in the oil field used in the sewage dilution block of polymer flooding: the air compressor oxygen aeration process and the ejector oxygen aeration process. In a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N11/00G01N1/38
CPCG01N11/00G01N1/38
Inventor 孙秀秀舒志明陈忠喜杜丹赵秋实马骏
Owner DAQING OILFIELD CO LTD
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