Fiber structure stabilizer for fracturing and preparation method thereof

By using a composite stabilizing structure of nitrogen-doped modified graphene oxide and cross-linked modified cellulose, the problem of easy collapse of fiber structure stabilizers under high temperature and high pressure was solved, achieving efficient fiber/proppant cluster stabilization and improving fracturing efficiency and reservoir stimulation effect.

CN122104202APending Publication Date: 2026-05-29SICHUAN CHUANQING UNDERGROUND TECHNOLOGY CO LTD +1
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Patent Information

Application Number
CN202610189227.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-10
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing fiber structure stabilizers are prone to collapse and uneven dispersion under high temperature and high pressure environments, making it difficult to form stable fiber/proppant clusters with proppant, which affects the fracturing operation effect and reservoir stimulation efficiency.

Method used

By employing nitrogen-doped modified graphene oxide, cross-linked modified cellulose, anionic surfactants, and nonionic short-chain alkyl glycosides, a multi-scale synergistic composite stable structure is formed through chemical bonding, hydrogen bonding, and charge interaction, thereby enhancing the shear resistance, temperature and salt resistance of the fiber network.

Benefits of technology

Under high temperature and high pressure, a stable system with high strength and high toughness is formed, which effectively improves the efficiency of fracturing operations and reservoir stimulation, reduces fiber escape rate, and enhances the stabilizing effect of fiber/proppane clusters.

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Abstract

The invention relates to the technical field of stabilizers in oil field operation, in particular to a fiber structure stabilizer for fracturing and a preparation method of the fiber structure stabilizer. Nitrogen atoms are doped in nitrogen-doped modified graphene oxide through compounding of chitosan and graphene oxide and high-temperature heat treatment; the characteristics of high specific surface area and mechanical strength of graphene are reserved, active sites are introduced through nitrogen doping, the adsorption and combination capacity with a fiber network is enhanced, a three-dimensional supporting framework is formed in fracturing fluid, formation pressure impact is effectively resisted, and collapse of a fiber structure is prevented; secondly, the cross-linked modified cellulose is cross-linked through epichlorohydrin to form a net structure, the temperature resistance and salt resistance of the cellulose can be remarkably improved, a modified cellulose molecular chain keeps the dispersion characteristic of hydrophilic carboxyl, and hydrophobic interaction is introduced through a tertiary amine group; and a double stable mechanism of a hydration layer and a hydrophobic micro-area is formed in fracturing fluid, so that the anti-shearing capability of the fiber bundle is enhanced.
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