Polymer aqueous solution preparation device and method for polymer flooding

Abstract

The invention discloses a polymer aqueous solution preparation device and method for polymer flooding and belongs to the technical field of oil displacement. The device comprises a feeding mechanism,a storage mechanism, a powder discharge control mechanism, a mixed jet mechanism, a dispersion mechanism, a curing mechanism, a conveying mechanism, an injection mechanism, a viscosity detection mechanism and a control unit, wherein the feeding mechanism is used for conveying dry polymer powder to the storage mechanism; an inlet of the powder discharge control mechanism is communicated with an outlet of the storage mechanism, an outlet of the powder discharge control mechanism is communicated with a first inlet of the mixed jet mechanism through a pipeline, and a second inlet of the mixed jetmechanism is communicated with a first water delivery pipeline; an outlet of the mixed jet mechanism is sequentially communicated with the dispersion mechanism, the curing mechanism, the conveying mechanism, the injection mechanism and a target wellhead through pipelines; the viscosity detection mechanism is used for detecting viscosity of the polymer aqueous solution output by the injection mechanism; the control unit is electrically connected with the powder discharge control mechanism and the viscosity detection mechanism. The device is simple in structure and can adjust viscosity of the polymer aqueous solution.

Description

technical field [0001] The invention relates to the technical field of oil flooding, in particular to a polymer aqueous solution preparation device and method for polymer flooding. Background technique [0002] Polymer flooding refers to dissolving polymer oil-displacing agents and other agents in the produced water of oil wells to form a polymer aqueous solution, which is then injected into the oil layer. Because the polymer aqueous solution has a certain viscosity, it can drive the flow of the affected crude oil, thereby increasing the crude oil. recovery rate. It can be seen that the viscosity of the polymer aqueous solution is very important for the enhanced oil recovery. Therefore, it is necessary to provide a device or method capable of preparing an aqueous polymer solution with a suitable viscosity. [0003] In the related art, the powder amount and water mixing amount of the polymer dry powder are calculated according to the required injection concentration, and th...

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Problems solved by technology

[0005] Because in practical application, the polymer aqueous solution is obtained by mixing the oil well produced water and the polymer dry powder, and the oil well produced water contains impurities, which will affect the viscosity of the polymer aqueous solution, and then the viscosity of the polymer aqueous solution cannot be controlled, affecting the polymer flooding. replacement effect

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