Enhanced foam system based on graphite particle synergistic stability, and preparation method thereof

A graphite particle and foam system technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of complex and changeable composition, difficult to control the effect, etc., to achieve delayed thinning, easy extraction, and improved recovery Yield effect

Active Publication Date: 2018-06-15
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Claims
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Problems solved by technology

The new inorganic fine particles used in the method are fine particles with a particle size of less than 2.5 μm captured and screened in the atmosphere, and can be compounded with a surfactant composed of camellia saponin and sodium lauroyl glutamate to form a stable foam system, and Such fine particles come from a wide range of sources, most of which are solid wastes from coal-fired power plants. Applying them to oilfields to enhance oil recovery can realize their resource utilization, but such fine particles are affected by the type, composition and combustion degree of each batch of coal Obviously, the composition of ingredients is more complex and changeable, making it difficult to control the effect of synergistically stabilizing foam with surfactants

Method used

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  • Enhanced foam system based on graphite particle synergistic stability, and preparation method thereof

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Embodiment 1

[0029] A reinforced foam system based on synergistic stabilization of graphite particles, made of the following components in mass concentration percentages: sodium lauryl sulfate 0.6%, cetyltrimethylammonium bromide 0.4%, 200 mesh flake graphite particles 1% , make up to 100% with water.

[0030] A method for preparing a strengthened foam system based on the synergistic stabilization of graphite particles, comprising:

[0031] Step 1: Prepare 500ml of sodium lauryl sulfate aqueous solution with a mass concentration of 0.6%, add 5g of 200-mesh flake graphite particles to the solution, and disperse for 2 hours with an ultrasonic power of 500W;

[0032] Step 2: centrifuge the solution obtained in step 1 at 1500 g for 15 min, and take 100 ml of the upper graphite dispersion;

[0033] Step 3: Add 0.4 g of cetyltrimethylammonium bromide to 100 ml of graphite dispersion, stir magnetically for 1 hour, and let stand to obtain a foaming liquid;

[0034] Step 4: Stir at 8000 rpm for 3...

Embodiment 2

[0036] A reinforced foam system based on synergistic stabilization of graphite particles, made of the following components in mass concentration percentages: sodium lauryl sulfate 0.6%, cetyltrimethylammonium bromide 0.4%, 200 mesh flake graphite particles 1% , make up to 100% with water.

[0037] The preparation method of the enhanced foam system based on the synergistic stabilization of graphite particles is the same as that of Example 1 except that nitrogen is used as the gas source during the stirring process using the Waring Blender method.

Embodiment 3

[0039] The reinforced foam system based on the synergistic stability of graphite particles is made of the following components in mass concentration percentages: fatty alcohol ether sodium sulfate 0.7%, cetyltrimethylammonium bromide 0.5%, 200 mesh flake graphite particles 1%, Water topped up to 100%.

[0040] The preparation method of the enhanced foam system based on the synergistic stabilization of graphite particles is the same as that of Example 1.

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Abstract

The invention discloses an enhanced foam system based on the graphite particle synergistic stability, and a preparation method thereof, which belong to the technical field of oil-gas field developmentengineering. The enhanced foam system based on the graphite particle synergistic stability is prepared from the following components in percentage by mass concentration: 0.3 to 1 percent of anionic surface active agent, 0.2 to 1 percent of cationic surface active agent, 0.5 to 1 percent of graphite particle, and the balance of solvent supplementing to 100 percent. The anionic surface active agentis hexadecyl trimethyl ammonium bromide. The enhanced foam system provided by the invention is simple in preparation process, can be quickly prepared in a large scale, and is suitable for a foam system applied to an oil and gas well, is capable of remarkably improving the recovery ratio, and is environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development engineering, in particular to a reinforced foam system based on synergistic stabilization of graphite particles and a preparation method thereof. Background technique [0002] Foam flooding is widely used as a technical means to enhance oil recovery, and has a history of nearly 60 years. Foam can cause a decrease in gas phase relative permeability and delay gas fingering. Foam quality is the key factor to determine the efficiency of foam flooding. However, foam is a thermodynamically unstable dispersion system, and this instability has brought great influence on the application of foam. Scholars at home and abroad have conducted a lot of research on how to improve foam stability, and have also proposed many methods. [0003] Research and development of new foaming agents is an important method. At present, the research and development of foaming agents mainly focuses on t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 张超李兆敏吴明轩刘建林吕广忠武守亚
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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