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A device for enhancing oil recovery by hydraulic low-frequency vibration and its application

A low-frequency vibration, recovery factor technology, applied in vibration generating devices, mining fluids, earthwork drilling, etc., can solve the problems of inability to adjust operating parameters in real time (vibration frequency, occupying a large ground area of ​​the mine, inconvenient operation, etc.) The effect of convenient subsequent production, low input cost, convenient installation and operation

Active Publication Date: 2018-12-25
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the low-frequency vibration equipment currently used in mines generally has the following disadvantages: the equipment is complex and inconvenient to operate; it occupies a large area on the ground of the mine, especially the vibration equipment; it is necessary to clean the pipe string in the well during operation, which affects subsequent production; it cannot be adjusted in real time Operating parameters (vibration frequency, vibration amplitude, etc.)

Method used

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  • A device for enhancing oil recovery by hydraulic low-frequency vibration and its application
  • A device for enhancing oil recovery by hydraulic low-frequency vibration and its application
  • A device for enhancing oil recovery by hydraulic low-frequency vibration and its application

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Experimental program
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Effect test

Embodiment 1

[0039] Such as Figure 1 to Figure 4 As shown, this embodiment provides a hydraulic low-frequency vibration enhanced oil recovery device, including a power system, a rotor system, a vibration system and a stator system, wherein:

[0040] The power system is arranged in the stator system, including the power source for driving the rotation of the rotor system;

[0041] The rotor system is arranged in the stator system, including a vertical rotation tube and a horizontal turntable arranged at the bottom of the vertical rotation tube. Flow channels are arranged on the bottom of the vertical rotation tube and the horizontal turntable, and the vertical rotation tube can be used for the flow of liquid medium;

[0042] The vibrating system is set in the stator system, including the vertical separation pipe string and the ring weight arranged in the vertical separation pipe string. The ring weight can move up and down under the pressure of the liquid medium;

[0043] The bottom of th...

Embodiment 2

[0049] A device for enhancing oil recovery by hydraulic low-frequency vibration, the structure of which is as described in Embodiment 1, the difference is that the angle between the inclined impact surface 14 and the horizontal plane is 45°, and the corresponding inclination of the ring weight 19 is The inclination angle of the face is also 45°.

Embodiment 3

[0051] A device for enhancing oil recovery by hydraulic low-frequency vibration, the structure is as described in Embodiment 1, the difference is that air holes are provided on the high-pressure shell 10, and the air holes are located below the inclined impact surface. When the annular weight strikes the inclined impact surface upwards, it can avoid the phenomenon of gas suffocation caused by the increase of air pressure in the inner cavity of the vertically separated pipe string.

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Abstract

The invention relates to a device for improving crude oil recovery by hydraulic low-frequency vibration and its application, comprising: the power system includes a power source for driving the rotation of the rotor system; The bottom of the rotating tube and the horizontal turntable are provided with a flow channel, and the vertical rotating tube can be used for the flow of liquid medium; the vibrating system includes a vertically separated pipe string and an annular weight installed in the vertically separated pipe string. It moves up and down under the pressure; the bottom of the stator system is provided with flow channels, which can communicate with the flow channels on the horizontal turntable for the discharge of liquid media. The vibration frequency of the present invention can be controlled by the speed of the motor, and the vibration power can be controlled by the pressure of the pumped liquid on the surface. It can directly act on the formation that needs to be treated, and it is convenient for subsequent production.

Description

technical field [0001] The invention relates to a device for enhancing crude oil recovery by hydraulic low-frequency vibration and its application, and belongs to the technical field of enhanced crude oil recovery in oil reservoirs. Background technique [0002] With the continuous deepening of my country's oil and natural gas development, low-permeability reservoirs have become an important potential for the development of the petroleum industry. Severe water channeling, low yield and poor mining effect. Therefore, there is an urgent need for auxiliary development techniques to improve the degree of crude oil production and recovery inside the reservoir. [0003] As a new type of physical oil recovery, low-frequency vibration oil recovery uses artificial vibration to directly or indirectly act on the formation in the form of low-frequency mechanical waves. Through the propagation of vibration waves in the formation, different physical and chemical changes occur in the reser...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/25E21B28/00
CPCE21B28/00E21B43/25
Inventor 刘静徐加祥李悦静刘杨李旭刘恒超郑黎明蒲春生
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)