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

A technology of polymer solution and experimental method, which is applied in the field of secondary shear experiment for determining the performance parameters of polymer solution for oil displacement, can solve the gap, cannot fully reflect the full shear of polymer solution, and cannot accurately and completely Reflect problems such as polymer solution shearing, and achieve the effect of wide application range and precise performance parameters

Active Publication Date: 2015-07-15
SOUTHWEST PETROLEUM UNIV
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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

Method used

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

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Embodiment

[0029] Embodiment: Taking a certain oil field as an example, describe in detail the secondary shear test method for measuring the performance parameters of the polymer solution for oil displacement, which includes the following steps:

[0030]1) Preparation of polymer solution for experiment Ⅰ: Measure the oilfield water, weigh the dry polymer powder, stir the oilfield water with a mixer to form a vortex, and place the weighed polymer within 30 seconds at a distance of 2 / 3 to 3 / 4 from the center of the vortex. Throw all the dry polymer powder into the oilfield water, keep stirring, stop stirring after the dry polymer powder is completely dissolved, and obtain the mother liquor of polymer solution I, dilute the mother liquor of polymer solution I with oilfield water to obtain a polymer with a concentration of no more than 5000mg / L Solution I.

[0031] Wherein, the oilfield water is prepared according to the formation water of a certain oilfield, and its preparation method inclu...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N11/00
Inventor 叶仲斌卢强舒政朱诗杰陈洪施雷庭韩贵新
Owner SOUTHWEST PETROLEUM UNIV
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