A kind of high-efficiency gas suspension proppant for fracturing and preparation method thereof

A proppant and air suspension technology, applied in chemical instruments and methods, earthwork drilling, wellbore/well parts, etc., can solve the problems of small number of bubble adsorption, discount of air suspension effect, weak bubble adsorption, etc., to achieve enhanced Aerophilicity, increased roughness, and improved adsorption rate

Active Publication Date: 2022-07-15
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above modification methods only perform film-forming modification on the original surface of the proppant, and the modification is not sufficient, resulting in weak adsorption to the bubbles, a small number of bubbles adsorbed, and a low overall gas adsorption rate, which greatly reduces the effect of air suspension.

Method used

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  • A kind of high-efficiency gas suspension proppant for fracturing and preparation method thereof
  • A kind of high-efficiency gas suspension proppant for fracturing and preparation method thereof
  • A kind of high-efficiency gas suspension proppant for fracturing and preparation method thereof

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preparation example Construction

[0033] This application document discloses a preparation method of a high-efficiency gas suspension proppant for fracturing, including:

[0034] Provide proppant particles, surface modification treatment solution, modifier solution, organic molecular linking agent;

[0035] Using the surface modification treatment solution to agitate the proppant particles at a temperature of 25-120° C. to perform surface roughening treatment, separation, and drying to obtain surface-roughened proppant particles;

[0036] Mixing the surface-roughened proppant particles with the modifier solution and the organic molecular linking agent, performing a modification reaction, separating and drying to obtain a modified proppant;

[0037] Wherein, the surface modification treatment solution is selected from any one of silicate solution, inorganic nanoparticle buffer solution, and the modifier; the modifier is selected from aminopropyltriethoxysilane , hexadecyltrimethoxysilane, methyltriethoxysilane...

Embodiment 1

[0060] (1) Dissolve 1.3 parts by weight of tridecanoic acid and 4 parts by weight of hexadecyltrichlorosilane in 50 parts by weight of ethanol respectively, and heat the solution to 50° C.; obtain the ethanol solution of tridecanoic acid and The ethanolic solution of hexadecyltrichlorosilane, and the ethanolic solution of hexadecyltrichlorosilane is divided into A solution and B solution for use.

[0061] (2) Add 100 parts by weight of ultrasonically cleaned 20-40 mesh ceramsite into the A solution, stir quickly for 3 minutes to be uniform, and let stand for 2 hours at room temperature after the stirring is stopped.

[0062] (3) filtering to obtain the modified ceramsite filter material, and drying it in an oven at a temperature of 80° C. to obtain the ceramsite with surface roughening treatment;

[0063] (4) Mixing 1.3 parts by weight of tridecanoic acid and B solution to obtain a modifier solution, adding the surface-roughened ceramsite to the modifier solution, stirring for...

Embodiment 2

[0065] (1) Prepare a total of 500 parts by weight of ethanol / water solution with a volume ratio of 1:2, add 0.1 wt% cationic surfactant cetyltrimethylammonium bromide (CTAB) to it to dissolve, and then dissolve sodium metasilicate Dissolving in the ethanol / aqueous solution at a concentration of 4 wt %, rapidly and continuously stirring for 1 h at normal temperature, an aqueous solution of nano-silica is prepared.

[0066] (2) Evenly spray the nano-silica aqueous solution on the surface of 5,000 parts by weight of 20-40 mesh ceramsite, and conduct sufficient stirring to make the nano-silica adhere to the surface to form a rough structure, and then at 120 ° C drying for 2 h to obtain SiO 2 Modified ceramsite.

[0067] (3) Dissolving cetyltrimethoxysilane with ethanol to prepare an ethanol solution with a content of 15wt%, and then spraying the cetyltrimethoxysilane ethanol solution on SiO at a concentration of 0.6wt% 2 Modified ceramsite was obtained after stirring for 1.5 hou...

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Abstract

The invention relates to a high-efficiency gas suspension proppant for fracturing and a preparation method thereof, and relates to the technical field of oil and gas field development, wherein the preparation method comprises: providing proppant particles, a surface modification treatment liquid, a modifier solution, and an organic molecular linking agent; Using the surface modification treatment solution, the proppant particles are subjected to surface roughening treatment by stirring at 25-120° C., separated and dried to obtain the surface-roughened proppant particles; the surface roughening treatment is carried out. The latter proppant particles are mixed with the modifier solution and the organic molecular linking agent, and subjected to modification reaction, separation and drying to obtain the modified proppant; the invention also discloses a high-efficiency gas suspension proppant for fracturing, The proppant can greatly reduce the requirements for fracturing fluid, and can achieve good suspension effect in different water-based fracturing fluids, greatly improve the operation effect, and achieve the purpose of greatly increasing production.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a high-efficiency gas suspension proppant for fracturing and a preparation method thereof. Background technique [0002] Sand fracturing is one of the most important ways to improve the production of oil and gas wells. The placement of proppant in the fracture and its own performance are one of the key factors affecting the fracturing effect. [0003] To carry and effectively place proppants in fractures, the industry has developed various types of fracturing fluids, including vegetable gum fracturing fluids, artificial linear polymer fracturing fluids, VES clean fracturing fluids, and hydrophobically associating polymer fracturing fluids. Fissure etc. However, the advantages of strong sand carrying, low damage and low cost of traditional fracturing fluids are often difficult to obtain at the same time. Therefore, improving the performance of proppant itse...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/80
CPCC09K8/805
Inventor 张浩杨波杨荻钟颖杨洋
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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