Secondary shear experimental method for measuring performance parameters of oil displacing polymer solutions

Abstract

The invention relates to a secondary shear experimental method for measuring performance parameters of oil displacing polymer solutions. The secondary shear experimental method comprises the following steps: (1) preparing an experimental polymer solution I which refers to a mixed solution of oil field water and polymer dry powder in any ratio; (2) performing primary shearing on the polymer solution I by use of a Wuyin stirrer to obtain a polymer solution II after the primary shearing, and measuring the viscosity, the condensate size, the microstructure, the rheological property, the resistance coefficient, the residual resistance coefficient and the oil displacement effect of the polymer solution II; and (3) performing secondary shearing by use of a core shearing polymer solution II to obtain a polymer solution III after the secondary shearing, and measuring the viscosity, the condensate size, the microstructure, the rheological property, the resistance coefficient, the residual resistance coefficient and the oil displacement effect of the polymer solution III. The secondary shear experimental method is capable of measuring the performance parameters of the polymer solutions in the actual reservoir really and actually.

Description

technical field [0001] The invention relates to an experimental method for measuring the performance parameters of a polymer solution for oil displacement, in particular to a secondary shearing experimental method for measuring the performance parameters of a polymer solution for oil displacement. Background technique [0002] At present, the demand for oil and gas resources in countries around the world is increasing day by day with the continuous development of the economy. In the absence of more proven oil and gas reserves, enhanced oil and gas recovery is the only and most effective way to meet the growing demand for oil and gas resources way. Polymer flooding is the most widely used method for enhancing oil and gas recovery. The polymer solution is injected into the formation to improve the mobility ratio and increase the swept volume, thereby enhancing oil and gas recovery. The biggest problem faced in the process of polymer solution injection into the formation is sh...

AI Technical Summary

Problems solved by technology

The near-wellbore shear can only simulate the shear of the polymer solution in the formation near the wellbore, and cannot fully reflect all the shear of the polymer solution

[0004] To sum up, the current shearing methods involved in indoor simulation are all carried out in a single shearing mode, which cannot accurately and completely reflect the shearing experienced by the polymer solution during the injection process. There is still a certain gap with the actual value

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