An on-line enrichment device and method for a polymer injection well

A technology for enrichment devices and polymer injection wells, which is applied in earthwork drilling, wellbore/well components, production fluids, etc. It can solve problems affecting the oil production efficiency of polymer injection wells, and achieve the effects of saving raw materials and simplifying the preparation process

Active Publication Date: 2021-01-29
PETROCHINA CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] When increasing the injection of high-concentration polymer flooding solution, it is necessary to shut down the production of the polymer injection well, which affects the oil recovery efficiency of the polymer injection well

Method used

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  • An on-line enrichment device and method for a polymer injection well

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Embodiment Construction

[0048] Unless otherwise defined, all technical terms used in the embodiments of the present invention have the same meanings as commonly understood by those skilled in the art. In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0049] It should be noted that, in the embodiment of the present invention, the polymer injection trunk line Y of the polymer injection well X refers to: in the polymer flooding operation, the delivery pipeline for transporting the polymer flooding solution to the polymer injection well. It can be understood that the polymer injection trunk line Y can be connected with multiple polymer injection wells, so as to inject polymer flooding solution to multiple wells using a single polymer injection pump.

[0050] The "upstream" and "downstream" mentioned in the embodiments ...

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Abstract

The invention discloses an online thickening device for a polymer injection well, which belongs to the field of tertiary oil recovery. The device includes: distribution pipeline, flow distributor, liquid distribution tank, hopper, injection pipeline, polymer injection pump and first control valve. The inlet of the dispensing pipeline is connected with the polymer injection main line of the injection well, and the outlet is connected with the first inlet of the liquid distribution tank; the hopper is connected with the second inlet of the liquid distribution tank; the outlet of the liquid distribution tank is connected with the inlet of the injection pipeline, and the injection The outlet of the pipeline communicates with the polymer injection main line; the polymer injection pump is arranged on the injection pipeline; the flow distributor and the first control valve are arranged on the injection pipeline. The enrichment device can perform individual adaptive enrichment operations on a single polymer injection well, and can perform on-line enrichment on the premise that the polymer injection well does not stop production, and uses the first polymer flooding solution as the prepared mother liquor , avoiding the separate use of the preparation mother liquor, which not only simplifies the preparation process, but also saves raw materials.

Description

technical field [0001] The invention relates to the field of tertiary oil recovery, in particular to an online thickening device and method for a polymer injection well. Background technique [0002] As an important technology in tertiary oil recovery, polymer flooding can not only effectively improve the water-oil mobility ratio and expand the swept volume, but also effectively improve the efficiency of blind-end residual oil flooding. At present, a single polymer injection pump is usually used to inject polymer flooding solution into multiple wells, so as to reduce the number of polymer injection pumps used, cost and land area. [0003] Due to the difference in reservoir physical properties, the pressure increase in the well area of ​​different polymer injection wells is quite different. In order to ensure the formation pressure balance, for some polymer injection wells with low injection pressure, it is necessary to stop production of all polymer injection wells, and then...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/22
CPCE21B43/16
Inventor 庄永涛闫云贵张杰朱火军孙建平程丽晶崔丹丹
Owner PETROCHINA CO LTD
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