Highly synergistic high liquid carrying solid phase self-mixing magnetic nanobubble displacement agent and preparation method thereof

By utilizing the self-disturbance mechanism of gravity and acid-base reaction in natural gas wells, a solid-phase self-mixing magnetic nanobubble discharge agent was prepared to solve the problem of wellbore liquid accumulation, achieving efficient foaming and stabilization, as well as high liquid carrying capacity, thereby improving the gas well production recovery effect.

CN122202034APending Publication Date: 2026-06-12CHINA NAT PETROLEUM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA NAT PETROLEUM CORP
Filing Date
2024-12-11
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Existing technologies often result in reduced production in the later stages of natural gas well production due to fluid accumulation in the wellbore. Traditional liquid agents are difficult to mix evenly, have insufficient foaming and foam stabilization properties, and magnetic nanomaterials are prone to agglomeration and have poor dispersion stability.

Method used

Gravity is used to allow the solid self-mixing magnetic nanobubble expellant to sink to the bottom of the well. Upon contact with water, it reacts violently to generate gas, creating disturbance. By combining modified magnetic nanoparticles with a surfactant system, a highly efficient and liquid-carrying nanobubble expellant is prepared. The gas self-disturbance generated by the acid-base reaction promotes the dispersion and uniform mixing of the agent.

Benefits of technology

It significantly enhances foaming and stabilizing performance, improves liquid discharge rate, increases liquid carrying capacity by 163%, maintains good dispersion in high temperature and high salt environment, and the nanoparticles can be recycled and reused.

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Abstract

The application provides a kind of strong synergistic high liquid-carrying solid-phase self-mixed magnetic nano foam displacement agent and its preparation method, the method comprises: the ultra-dispersed magnetic nanoparticle prepared by the application, foaming agent I and II, and foam stabilizer are dispersed in organic solvent to obtain a mixed solution;Adhesive is dissolved in the mixed solution to prepare adhesive;Solid base is crushed and sieved, and mixed with the adhesive to granulate to obtain solid base particles;Solid acid is crushed and sieved, and mixed with the adhesive to granulate to obtain solid acid particles;Solid acid particles and solid base particles are mixed and pressed to obtain nano foam displacement agent.The ultra-dispersed magnetic nanofluid prepared by the application maintains good dispersion stability at 120000 mg / L solution and 110 DEG C;The half-life of the prepared nano foam displacement agent is 595 min, the liquid-carrying capacity is 90%, the performance is improved by 163% compared with the pure surfactant system, the salt resistance of the foam displacement agent is 100000 mg / L, and the temperature resistance is 110 DEG C.
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