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Method for rapidly preparing polymer solution for oil displacement

A polymer solution and polymer technology, applied in the direction of mixing methods, drilling compositions, chemical instruments and methods, etc., can solve the problems of no application of supergravity technology, low preparation efficiency, difficult process, etc., and achieve energy consumption The effect of reducing, less equipment investment, and improving mass transfer efficiency

Inactive Publication Date: 2014-06-25
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the viscosity of the polymer solution is generally high, the resistance to the stretching and dispersion of long-chain molecules in the polymer solution is very large, so the aging of the polymer solution in the traditional stirring tank faces great technological difficulties. The disadvantages are: Large investment, high energy consumption and low preparation efficiency
[0005] However, in the prior art, the hypergravity technology has not been applied to the field of preparing polymer solution for oil displacement

Method used

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  • Method for rapidly preparing polymer solution for oil displacement
  • Method for rapidly preparing polymer solution for oil displacement
  • Method for rapidly preparing polymer solution for oil displacement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A method for rapidly preparing polymer solution for oil displacement, comprising the steps of:

[0039] Adjust the temperature of the system to 20°C, start the supergravity rotation device, adjust the rotor speed so that the supergravity level in the rotor reaches 100 times the acceleration of gravity g; add 27.35g of polyacrylamide dry powder with a molecular weight of 25 million (moisture content 8.59%) to the polymerization The dry powder storage tank is continuously dispersed into the dispersion buffer tank by a blower; 4972.65g of pure water is added to the water tank, and it is input into the dispersion buffer tank through a water pump. The concentration of the polymer aqueous dispersion formed by water and dry powder is 5000mg / L; the dispersion liquid formed in the dispersion liquid storage tank contains a large number of dry powder micro-agglomerates that are not completely dissolved and dispersed;

[0040] Open the control valve of the liquid inlet of the supe...

Embodiment 2

[0042] A method for rapidly preparing polymer solution for oil displacement

[0043] Adjust the temperature of the system to 20°C, start the supergravity rotation device, adjust the rotor speed so that the supergravity level in the rotor reaches 150 times the acceleration of gravity g; add 27.35g of polyacrylamide dry powder with a molecular weight of 16 million (moisture content 8.59%) to the polymerization The dry powder storage tank is continuously dispersed into the dispersion buffer tank through the blower; 4972.65g of pure water is added to the water tank, and it is input into the dispersion buffer tank through the water pump. The concentration of the polymer dispersion formed by water and dry powder is 5000mg / L . The dispersion formed in the dispersion storage tank contains a large number of incompletely dissolved and dispersed dry powder micelles;

[0044] Open the control valve of the liquid inlet of the supergravity rotating device, the dispersion liquid is sprayed ...

Embodiment 3-20

[0046] Process flow and steps are the same as Examples 1 and 2, and the temperature of each embodiment, dispersion liquid concentration, polymer type, supergravity rotating device supergravity level, dispersion liquid feed volume flux and test results are shown in Table 1:

[0047] Table 1:

[0048]

[0049] It can be seen from the above Table 1 that the polymer solution for oil displacement can be rapidly prepared by the method of the present application.

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Abstract

The present invention discloses a method for rapidly preparing a polymer solution for oil displacement. The method comprises: 1) opening a hypergravity rotation device, wherein the hypergravity level gr in the device is 10-1000 times the gravity acceleration g; and 2) conveying a polymer aqueous dispersion to the hypergravity rotation device provided with a filler to obtain the aging solution from the liquid phase outlet of the hypergravity rotation device, wherein the aging solution is the polymer solution for oil displacement. According to the present invention, with the filler in the rotor of the hypergravity rotation device, the polymer solution entering the filler layer can be cut, broken and torn to make the fluid produce a large amount of the rapidly-updating surface area so as to substantially enhance the mass transfer process of the polymer molecules, increase the mass transfer efficiency, and reduce the equipment size; and compared with the existing technology adopting the aging tank stirring manner, the method of the present invention has advantages of less equipment investment, low energy consumption, small equipment occupation space, high operation flexibility and the like.

Description

technical field [0001] The invention relates to a method for preparing a polymer solution, in particular to a method for rapidly preparing a polymer solution for oil displacement. Background technique [0002] At present, the comprehensive water content of most old oilfields in China has reached a very high level. Controlling the water content of oilfield produced fluid and realizing stable production is an urgent problem to be solved in oilfields. The main means to maintain the stable production of oil fields is the tertiary oil recovery technology. Polymer flooding is an tertiary oil recovery technology developed in the early 1960s. It is characterized by adding high-molecular-weight polymers to water to increase its viscosity, improve the mobility ratio between the displacing phase and the displacing phase, and expand Sweep volume, thereby enhancing oil recovery. Polymer flooding technology is a more economical and effective way to enhance oil recovery. Compared with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F3/00C09K8/588B01F23/00
Inventor 陈建峰张亮亮赵宏王洁欣张鹏远初广文
Owner BEIJING UNIV OF CHEM TECH
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