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A method and device for preparing a nano-dispersion system

A nano-dispersion and system technology, applied in chemical instruments and methods, mixers with rotary stirring devices, and drilling compositions, etc. problem, to achieve good stability and easy injection, improve sweep efficiency, easy to operate

Active Publication Date: 2017-09-01
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, water flooding development is facing two common problems: First, reservoir heterogeneity causes injected water to channel along large pores, making it impossible to enter pores with relatively low permeability
[0004] At present, there is no such dispersion system suitable for high-temperature and high-pressure reservoir conditions. The bubble dispersion system generated by the existing methods and devices for generating nano-millimeter bubbles is difficult to stabilize at high temperatures and easily merges under high pressure.

Method used

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  • A method and device for preparing a nano-dispersion system
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  • A method and device for preparing a nano-dispersion system

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Experimental program
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Embodiment 1

[0051] This embodiment provides a device for preparing a nano-dispersion system, the structure of which is as follows: image 3 shown.

[0052] The device includes an electron scattering source 1, a system reaction generating container 3, an agitator 302, a transducer sheet 7, an ultrasonic generator 8, an intermediate container and a displacement pump 6, and the transducer sheet 7 is placed in the system reaction generating container 3 , the ultrasonic generator 8 is placed outside the system reaction generating container 3, and the transducer sheet 7 is connected with the ultrasonic generator 8 through a wire 705;

[0053] The structure of the system reaction generating container 3 is as follows Figure 4 As shown, it includes a visible end cover 301 and a kettle body 304, the visible end cover 301 is placed on the side of the kettle body 304, and is pressed on the kettle body 304 by an O-shaped sealing ring; the visible end cover 301 is provided with a glass block 305; th...

Embodiment 2

[0059] The present embodiment provides a kind of method utilizing the device in embodiment 1 to prepare nano-dispersion system, it comprises the following steps:

[0060] 1) Fill water and CO respectively in the first intermediate container 10 and the second intermediate container 9 2 ;

[0061] 2) Inject the water in the first intermediate container 10 into the system reaction generating container 3, and when the distance from the liquid level to the bottom of the glass block 305 accounts for 2 / 3 of the height of the entire glass block 305, stop injecting water, and place the second intermediate CO in vessel 9 2 Inject into the system reaction generation container 3, make the temperature in the system reaction generation container 3 reach the design value (the temperature is 50 ℃), by continuously injecting CO 2 The pressure in the system reaction generating container 3 is raised to the design value (10MPa);

[0062] 3) Turn on the stirrer 302 and stir for 1h to make the w...

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Abstract

The invention provides a method and a device for preparing a nanometer dispersion system. The device includes an electron scattering source, a system reaction generating container, a stirrer, a transducer, an ultrasonic generator, an intermediate container and a displacement pump, wherein the transducer is placed in the system reaction generating container, and the ultrasonic generator is placed in the system reaction Outside the generating container, the transducer sheet is connected to the ultrasonic generator through wires, one end of the intermediate container is connected to the system reaction generating container, and the other end is connected to the displacement pump. The method of using the device to prepare a nano-dispersion system includes: injecting fluid 1 and fluid 2 into the system reaction generation container respectively; making fluid 1 and fluid 2 in a saturated and dissolved state; turning on the ultrasonic generator and electron scattering source, and the transducer plate is working. The system reacts to form a nano-dispersion system in the container. The nano-dispersion system has good stability and injectability, and is suitable for the development of high-temperature and high-pressure oil reservoirs.

Description

technical field [0001] The invention relates to a method and a device for preparing a nano-dispersion system, belonging to the technical field of petroleum development. Background technique [0002] Reservoir development generally adopts the method of replenishing energy and injecting displacement agents (water, polymer solution, gas, etc.) into the reservoir to displace crude oil. The most widely used method in my country is water injection development. [0003] At present, water flooding development faces two common problems: First, reservoir heterogeneity causes injected water to channel along large pores, preventing it from entering pores with relatively low permeability. The second is the low-permeability reservoir, the rock pore radius is small, and the injected water can only seep into the pores under a relatively large pressure difference. If nano and nano-scale bubbles can be dispersed into water to form a dispersed system, micro-bubbles can enter pores where injec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F11/02B01F7/02C09K8/50
Inventor 李实陈兴隆秦积舜俞宏伟张可许世京姬泽敏
Owner PETROCHINA CO LTD
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