Method for determining application scene of gel microsphere profile control agent through fracture core plugging experiment

By optimizing the experimental method for sealing fractured cores with gel microsphere modulators, the problem of large experimental results in existing technologies has been solved, enabling accurate sealing assessment of reservoirs with different fracture types, and improving experimental accuracy and practical application guidance.

CN122345694APending Publication Date: 2026-07-07XI'AN PETROLEUM UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XI'AN PETROLEUM UNIVERSITY
Filing Date
2026-04-09
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing experimental methods for sealing fractured cores with gel microsphere modulators lack attention to the accuracy of fracture extension, resulting in large errors in experimental results and making it difficult to accurately evaluate their application effect in heterogeneous reservoirs.

Method used

By developing a detailed experimental method for sealing fractured cores, including steps such as primary waterflooding, core fracture creation, displacement by gel microsphere modulator, and secondary waterflooding, and by rationally controlling core length, permeability, fracture width, and gel microsphere injection rate, setting critical conditions for fully open and closed fractures, the experimental steps were optimized to improve accuracy.

Benefits of technology

This study enables precise evaluation of the plugging effect of gel microsphere modulators in reservoirs with different fracture types, improves the accuracy of experimental results, and allows for the selection of appropriate gel microsphere modulators and concentrations for actual production based on experimental results, thus adapting to complex geological conditions.

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Abstract

The application discloses a gel microsphere profile control agent application scene determining fractured core plugging experiment method, and comprises the following steps: S1, primary water flooding; S2, core fracture making: S2-1, making full open type fracture; S2-2, making closed type fracture; S3, gel microsphere profile control agent displacement; S4, secondary water flooding.The application provides a special fractured core plugging experiment method for the characteristics of high shear resistance and high salt tolerance of the gel microsphere profile control agent, especially when the closed type fracture is made, the influence of various factors is comprehensively considered, so that a more accurate fracture cutoff position is obtained, the demand of the gel microsphere profile control agent is met, the experiment result accuracy is improved, and the plugging effect of the full open type fracture is compared, finally, a perfect experiment step system is formed, so that the gel microsphere profile control agent has practical application value when being used in a reservoir with strong heterogeneity and large pore throat size difference.
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Citation Information

Patent Citations

  • Experimental device and method for researching artificial fracture gel plugging law

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