Method for determining the amount of carbon dioxide sequestration

By injecting formation water and crude oil into the core to conduct carbon dioxide displacement experiments, combined with mineral content detection and solubility measurement, the problem of the inability to quantitatively divide carbon dioxide burial volume in existing technologies has been solved, and accurate evaluation of carbon dioxide burial volume and stable burial efficiency assessment have been achieved.

CN122109430APending Publication Date: 2026-05-29PETROCHINA CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
PETROCHINA CO LTD
Filing Date
2024-11-29
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing methods for calculating carbon dioxide storage capacity cannot quantitatively divide it according to different storage methods, resulting in an inability to accurately know the specific amount of carbon dioxide carried by each storage method and thus failing to provide accurate data support for evaluating carbon dioxide storage capacity.

Method used

By sequentially injecting formation water and formation crude oil into the core, carbon dioxide displacement experiments were conducted. Combined with mineral content detection and solubility measurement, the mineralization, binding, dissolution, and microstructural burial of carbon dioxide were determined. The burial amounts were calculated using formulas, and the pore throat distribution and contribution rate were determined using nuclear magnetic resonance scanning.

Benefits of technology

It enables quantitative segmentation of carbon dioxide storage, accurately evaluates carbon dioxide storage capacity, provides precise data support, reflects the potential for stable CO2 storage, and guides the actual carbon dioxide storage in formations.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application relates to the field of geological exploration and development, and discloses a method for determining the amount of carbon dioxide storage, comprising: determining the mineralization storage amount of carbon dioxide based on the initial mineral content and the final second mineral content; determining the bound storage amount of carbon dioxide based on displacement-related data; determining the dissolution storage amount of carbon dioxide based on the formation water saturation, the formation crude oil saturation, the solubility of carbon dioxide in formation water, the solubility of carbon dioxide in formation crude oil, and the displacement-related data; and determining the microstructure storage amount of carbon dioxide based on the mineralization storage amount, the bound storage amount, the dissolution storage amount, and the displacement-related data. Based on the present application, the mineralization storage amount, the bound storage amount, the dissolution storage amount, and the microstructure storage amount of carbon dioxide can be quantitatively divided, so that the carbon dioxide storage capacity can be further accurately evaluated.
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