Covering layer system sealing performance evaluation and safe sealing pressure determination method

By establishing an inversion model based on the diffusion wave solution of the pore medium pressure, the maximum sealing pressure of the capping unit is determined, and the problem of difficulty in quantitatively representing the sealing nature of the capping system in the prior art is solved, quantitative evaluation of the sealing nature of the capping system and determination of the safe sealing pressure are realized, and energy storage capacity and engineering safety are improved.

CN119761268AActive Publication Date: 2025-04-04CHINA PETROLEUM & CHEMICAL CORP +1
View PDF 6 Cites 1 Cited by

Patent Information

Application Number
CN202510267064.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-07
Publication Date
2025-04-04
Estimated Expiration
2045-03-07

AI Technical Summary

Technical Problem

The prior art is difficult to effectively quantify the enclosure of the cover system, and there is a lack of methods to fully tap the enclosure potential of the cover system, and supports the design of energy storage projects with larger capacity and more economical.

Method used

By establishing an inversion model based on the pressure diffusion wave solution of the pore medium, considering the thickness of the cap layer unit, the critical breakthrough of the cap layer unit is transferred from the bottom to the top of the cap layer, and a critical breakthrough pressure inversion model is established to determine the maximum sealing pressure of the cap layer unit.

Benefits of technology

The quantitative evaluation of the enclosure of the cover layer system and the determination of the safe enclosure pressure are achieved, which can more effectively exert the energy storage enclosure potential of the cover layer, improve the energy storage capacity, and ensure the safety of the project.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119761268A_ABST
    Figure CN119761268A_ABST
Patent Text Reader

Abstract

The invention discloses a method for evaluating sealing performance of a cap stratum system and determining safe sealing pressure, and the method comprises the steps: building an inversion model according to a pressure diffusion wave solution in a pore medium, considering the thickness of a cap stratum unit, transferring the critical breakthrough of the cap stratum unit from the bottom to the top of the cap stratum, and building a critical breakthrough pressure inversion model, determining the maximum sealing pressure of the cover layer unit; and on the basis of the maximum sealing pressure of the cover layer unit, determining a site selection evaluation stage-oriented quantitative evaluation method for the sealing performance of the cover layer system, and determining an engineering design implementation stage-oriented safe sealing pressure of the cover layer system. The critical breakthrough of the top of the cover layer unit is taken as a boundary condition, the thickness of the cover layer unit is considered, and compressed air is allowed to partially break through the cover layer unit under the condition of meeting energy storage and pressure maintaining, so that the energy storage sealing capacity of the cover layer is excavated, and a basis is provided for safe sealing pressure calculation of an energy storage project.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Method for predicting maximum closed hydrocarbon column height of cover coat

    CN110187403A

  • Quantitative evaluation method for sealing capacity of gypsum salt rock type cover strata

    CN114047547A

  • Calculating method for effective thickness of cap rock based on cap rock anisotropism

    CN109187302A

  • Method for continuously predicting breakthrough pressure of gas storage cover layer

    CN112943229A

  • Method for evaluating leakproofness of geological carbon dioxide sequestration cover layer

    CN116911209A

Cited By

  • Three-dimensional physical simulation experiment method for carbon dioxide geological buried storage layer-cover layer system

    CN121562223A