Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Equipment and method for preparing supercritical carbon dioxide microemulsion and fly ash particle compound dispersion

A technology of carbon dioxide and fly ash, which is applied in the direction of chemical instruments and methods, bulk chemical production, drilling compositions, etc., can solve the problems of short fluidity control action time, difficulty in injecting nanoparticles, and high cost of nanoparticles , to achieve the effects of reducing the amount of adsorption, improving dispersion, and improving oil recovery

Active Publication Date: 2019-06-28
CHINA UNIV OF PETROLEUM (EAST CHINA)
View PDF17 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the difficulty of injecting nanoparticles in the prior art, which is easily absorbed by the formation to reduce its utilization efficiency and shorten its radius of action in the formation; the foam produced by the surfactant is subject to its own thermodynamic instability. The impact of the influence, the stability is poor, and the fluidity control action time is short; the nano-particles are expensive and cannot be applied on a large scale. A kind of supercritical carbon dioxide microemulsion and fly ash particle compound dispersion preparation equipment and method are provided. This method can realize the adjustability of fly ash particle size, and improve the scope of application of this type of compound dispersion; this method uses supercritical carbon dioxide as the continuous phase, and the surfactant solution dissolved with fly ash nanoparticles as the dispersed phase , can reduce the adsorption amount of fly ash particles when flowing in the formation, thereby improving its utilization efficiency, and fly ash nanoparticles will be adsorbed on the gas-liquid interface during the steering process, which can enhance the stability of the foam and realize the reduction of carbon dioxide Fluidity control; at the same time, this method turns fly ash particles into treasures, realizes resource utilization and reduces costs

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Equipment and method for preparing supercritical carbon dioxide microemulsion and fly ash particle compound dispersion
  • Equipment and method for preparing supercritical carbon dioxide microemulsion and fly ash particle compound dispersion
  • Equipment and method for preparing supercritical carbon dioxide microemulsion and fly ash particle compound dispersion

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0051] The present invention also provides a method for preparing a composite dispersion of supercritical carbon dioxide microemulsion and fly ash particles, the method comprising the following steps:

[0052] (1) Grinding the fly ash particles to obtain fly ash nanoparticles;

[0053] (2) The fly ash nanoparticles and the surfactant solution are ultrasonically stirred and mixed to obtain the fly ash nanoparticles-surfactant solution dispersion;

[0054] (3) Drying, liquefying, boosting and heating the carbon dioxide gas successively to obtain supercritical carbon dioxide that is boosted and heated, and injecting the supercritical carbon dioxide that is boosted and heated from the bottom of the contact tower into the contact tower;

[0055] (4) The fly ash nanoparticle-surfactant solution dispersion liquid is atomized and sprayed at the top of the contact tower, and the supercritical carbon dioxide of the boosted temperature injected from the bottom of the contact tower Mixin...

Embodiment 1

[0073] (1) Grinding the fly ash particles in the grinding device 3 to obtain fly ash nanoparticles with a particle size of 10 nm;

[0074] (2) The fly ash nanoparticles and anionic surfactant dioctyl sodium sulfosuccinate solution are ultrasonically stirred and mixed in the ultrasonic stirring section (5) to obtain fly ash nanoparticles-surfactant agent solution dispersion;

[0075] (3) Carbon dioxide gas is dried, liquefied, pressurized and heated successively in the supercritical carbon dioxide supply unit (90), to obtain supercritical carbon dioxide with boosted pressure and heated, and the supercritical carbon dioxide with boosted pressure and heated Temperature is 50 DEG C, pressure is 30MPa, and the supercritical carbon dioxide of gained pressurization heating is injected in the described contact tower (14) from the bottom of contact tower (14);

[0076] (4) The fly ash nanoparticle-surfactant solution dispersion liquid is atomized and sprayed through the atomizing nozz...

Embodiment 2

[0078] (1) Grinding the fly ash particles in the grinding device 3 to obtain fly ash nanoparticles with a particle size of 200nm;

[0079] (2) The fly ash nanoparticles and anionic surfactant dioctyl sodium sulfosuccinate solution are ultrasonically stirred and mixed in the ultrasonic stirring section (5) to obtain fly ash nanoparticles-surfactant agent solution dispersion;

[0080] (3) Carbon dioxide gas is dried, liquefied, pressurized and heated successively in the supercritical carbon dioxide supply unit (90), to obtain supercritical carbon dioxide with boosted pressure and heated, and the supercritical carbon dioxide with boosted pressure and heated Temperature is 45 ℃, and pressure is 25MPa, and the supercritical carbon dioxide of gained pressurization heating is injected in the described contact tower (14) from the bottom of contact tower (14);

[0081] (4) The fly ash nanoparticle-surfactant solution dispersion liquid is atomized and sprayed through the atomizing nozz...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of oil-gas field development and oil extraction engineering, and discloses equipment and method for preparing a supercritical carbon dioxide microemulsionand fly ash particle compound dispersion. When the supercritical carbon dioxide microemulsion and fly ash particle compounded dispersion prepared by the equipment and the method flows in an oil reservoir stratum, due to the fact that the fly ash particles are solubilized in the dispersed phase the probability of contact between the fly ash particles and a pore throat wall surface of the stratum can be greatly reduced, the adsorption amount is reduced, and the utilization efficiency is improved; when the dispersion is in contact with stratum water in the stratum, reverse microemulsion of water-in-carbon dioxide can be converted into dioxide-in-water carbon emulsion, namely carbon dioxide foam, and in the conversion process, the fly ash nano particles can be adsorbed on a gas-liquid interface to hinder gas diffusion among bubbles, so that the strength of a bubble liquid film is improved, the stability of the foam is enhanced, the carbon dioxide fluidity is controlled, and the crude oil recovery is enhanced.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development and production engineering, in particular to a preparation equipment and method for a compound dispersion of supercritical carbon dioxide microemulsion and fly ash particles. Background technique [0002] As a gas displacement agent, carbon dioxide is widely used in the field of oil and gas field development, involving various aspects such as carbon dioxide flooding of thin oil and carbon dioxide huff and puff of heavy oil. However, due to the low viscosity and low density of carbon dioxide itself, when carbon dioxide flows in the formation, it is easy to produce viscous fingering and gravity differentiation, which makes carbon dioxide bypass the displaced crude oil and channel along high-permeability channels, reducing the The spread of carbon dioxide affects the efficiency, so that it produces ineffective injection and wastes manpower and material resources. Especially in ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/594
CPCY02P20/54
Inventor 张超李兆敏尚朝辉何海峰程显光吴明轩席玲慧
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products