Integrated composite transformation liquid and preparation method thereof

By preparing an integrated composite transformation liquid, the problem of the inability to use acid liquid and fracturing liquid at the same time is solved, the construction efficiency and quality are improved, pipeline blockage and formation damage are reduced, and the acid liquid action distance and deep penetration effect are improved.

CN119529812AInactive Publication Date: 2025-02-28SOUTHWEST PETROLEUM UNIV +1
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Patent Information

Application Number
CN202510095657.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-22
Publication Date
2025-02-28
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

In the prior art, acid liquid and fracturing liquid cannot be used simultaneously, resulting in low construction efficiency, and flocs and precipitation are generated after the polymer fracturing liquid and acid liquid are mixed, blocking the pipelines and formations.

Method used

An integrated composite transformation liquid is provided, which includes the preparation of the main agent for the resistance reducing agent, the slow-speed and desorption components and the crosslinking agent components. Through the action of the suspension agent and the alcohol solvent, the suspension stability of the polymer powder is achieved, the introduction of non-ionic surfactants and fluorocarbon surfactants is introduced, the surface tension is reduced, the reflux effect is improved, and the release rate of zirconium ions is controlled through the zirconium crosslinking system.

Benefits of technology

The simultaneous use of acid and fracturing fluid is achieved, the injection pressure of the construction pump is reduced, the construction efficiency and quality is improved, the pipeline blockage and formation damage is reduced, and the acid is effective and the deep penetration effect is improved.

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Abstract

The invention relates to the technical field of oil and gas field yield increase, and provides an integrated composite transformation liquid and a preparation method thereof. The problems that in the prior art, fracturing fluid and acid fluid cannot be used by one liquid, crosslinking in the acid fluid and hydrogen ion slow release for rock surface adsorption cannot be met at the same time, the resistance reducing function is achieved in the acid fluid, and the desorption function is not achieved when the fracturing fluid and the acid fluid are used for a reservoir mainly containing adsorption gas are solved. According to the main scheme, the preparation method comprises the following steps: preparing a resistance reducing agent main agent, a retarding and desorbing component and a cross-linking agent component. The main agent of the resistance reducing agent is prepared from polyacrylamide, poly (N-isopropylacrylamide) and other raw materials; the retarding and desorption component comprises a fluorocarbon surfactant, a titanate coupling agent and the like; the cross-linking agent component is composed of an organic zirconium cross-linking main agent, an organic acid salt cross-linking ligand and the like. The acidizing and fracturing fluid is used for acidizing and fracturing construction of oil and gas fields, can meet the technological requirements of acidizing and fracturing at the same time, and has the advantages of resistance reduction, low residue, high retardance and deep penetration in acid liquor.
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Citation Information

Patent Citations

  • A self-generating acid composite acid fracturing process for high-temperature deep well carbonate reservoirs

    CN104975840B

  • A method for preparing an acid-resistant thickener and its application in multifunctional acids and acid-resistant fracturing fluids.

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  • Fracturing fluid stock solution, acid fracturing fluid, resistance-reducing water and sand-carrying fracturing fluid and preparation method thereof

    CN111690398A

  • Preparation and formulation method of integrated self-crosslinking thickener modified polymer for fracturing

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  • Integrated composite acid and preparation method thereof

    CN112940706A