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Method for measuring hydrodynamic size of polymer

A hydrodynamic and polymer technology, applied in measurement devices, scientific instruments, instruments, etc., can solve the problems of high cleanliness and concentration requirements of polymer solutions

Active Publication Date: 2019-09-17
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The embodiment of the present invention provides a method for determining the hydrodynamic size of a polymer to overcome the problem of high requirements on the cleanliness and concentration of the polymer solution

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  • Method for measuring hydrodynamic size of polymer
  • Method for measuring hydrodynamic size of polymer

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Embodiment Construction

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0043] figure 1 Schematic diagram of the structure of the experimental device for measuring the hydrodynamic size of the polymer provided by the embodiment of the present invention. Such as figure 1 As shown, the experimental device 101 includes a valve 1, a liquid discharge container 2, a device support 3, a microporous membrane filter device 4...

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Abstract

The embodiment of the invention provides a method for measuring the hydrodynamic size of a polymer. The method comprises the steps of acquiring the initial hydrodynamic sizes of the polymer solution to be measured under multiple preset pressure values; acquiring a target working pressure according to each pressure value and the corresponding initial hydrodynamic size; under the target working pressure, performing a continuous filter test on the polymer solution to be measured, thus acquiring a target filter volume corresponding to each filter membrane with a preset hole diameter; separately computing a filter rate of the polymer solution to be measured that passes through each filter membrane with the preset hole diameter according to the target working pressure and the target filter volume corresponding to each filter membrane with the preset hole diameter; and according to each preset hole diameter and the corresponding filter rate, generating a relation curve between the hole diameters and the filter rates, acquiring the hole diameter corresponding to the inflection point of the relation curve, and using the hole diameter corresponding to the inflection point as the hydrodynamic size of the polymer solution to be measured. The concentration and cleanness of the polymer solution to be measured do not need to be acquired, and the accuracy of the measured hydrodynamic size is improved.

Description

technical field [0001] The embodiment of the present invention relates to the technical field of oil and gas field development, in particular to a method for measuring the hydrodynamic size of a polymer. Background technique [0002] The polymer used for oil displacement is a random coil formed by winding one or more molecular chains in the solution. When studying the polymer, it is necessary to measure the hydrodynamic size of the polymer. The hydrodynamic size of a polymer refers to the size of the layer of hydrated molecules surrounding the polymer molecules in an aqueous polymer solution. [0003] At present, when measuring the hydrodynamic size of a polymer, the dynamic light scattering method is usually used to directly measure the hydrodynamic size of a polymer solution. [0004] However, the inventors have found that at least the following problems exist in the prior art: when using the dynamic light scattering method to measure the hydrodynamic size of the polymer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/00
CPCG01N5/00
Inventor 李宜强陈小龙刘哲宇陈诚彭颖峰陈映赫
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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