Secondary shear test method for determining performance parameters of polymer solutions for oil displacement

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 to achieve accurate performance parameters and a wide range of applications

Active Publication Date: 2018-01-12
SOUTHWEST PETROLEUM UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 test method for determining performance parameters of polymer solutions for oil displacement
  • Secondary shear test method for determining performance parameters of polymer solutions for oil displacement
  • Secondary shear test method for determining performance parameters of polymer solutions for oil displacement

Examples

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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 present invention relates to a two-stage shear test method for measuring the performance parameters of a polymer solution for oil displacement, which comprises the following steps: 1) preparing a polymer solution I for the experiment, and the polymer solution I is oilfield water and polymer dry powder Mixed solution in any proportion; 2) Use Wuyin agitator to perform primary shear on polymer solution Ⅰ, obtain polymer solution Ⅱ after primary shear, and measure viscosity, aggregate size, microcosmic Structure, rheological properties, drag coefficient, residual drag coefficient and oil displacement effect; 3) The core shear polymer solution II is used for secondary shearing to obtain polymer solution III after secondary shearing, and the polymer solution Ⅲ Viscosity, aggregate size, microstructure, rheological properties, drag coefficient, residual drag coefficient and oil displacement effect. The invention can truly and accurately measure the performance parameters of the polymer solution in actual underground storage.

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 shear 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 shea...

Claims

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Application Information

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Patent Type & Authority Patents(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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