Pore throat asphaltene deposition test system and rock core asphaltene rapid evaluation method

Through the pore throat asphaltene deposition testing system, using micro-nano simulated tubes and photometric analysis technologies, the problem of the inability to accurately analyze the impact of asphaltene on pore throat in the existing technology is solved, and the accurate quantitative analysis and rapid evaluation of the asphaltene deposition in the micro-nano pore throat is achieved, providing a more accurate theoretical basis for the development of CO2 gas injection.

CN119688549APending Publication Date: 2025-03-25CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Patent Information

Application Number
CN202411880607.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-19
Publication Date
2025-03-25

AI Technical Summary

Technical Problem

The prior art cannot accurately and quantitatively analyze the impact of asphaltene on pore throat, especially in micro-nanoporous throats, and cannot simulate the effect of long-term contact between CO2 and crude oil during the production process.

Method used

The pore throat asphaltene deposition test system is adopted, which includes micro-nano simulation tubes, injection modules, purge modules and acquisition modules. By simulating the contact process of CO2 and crude oil, the amount of asphaltene deposition in pore throats is measured, and the photometric analysis and mercury injected experiments are combined to quickly evaluate the asphaltene deposition of core samples.

Benefits of technology

Accurate quantitative analysis of asphaltene deposition in pore throats can more accurately simulate the long-term contact between CO2 and crude oil during the production process, providing a more accurate theoretical basis to support the development of CO2 gas.

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Abstract

The invention discloses a pore throat asphaltene deposition test system and a rock core asphaltene rapid evaluation method, and the test system mainly comprises a micro-nano simulation tube used for simulating a pore throat, an injection module used for injecting crude oil and CO2 into the micro-nano simulation tube, a purging module used for purging and returning the crude oil under the action of CO2 in the micro-nano simulation tube, and a sample loading module used for loading the crude oil into the micro-nano simulation tube, and the collecting module is used for collecting the backflow crude oil. By adopting the scheme, the asphaltene deposition condition of crude oil in the simulated size pore throat under the action of CO2 can be more accurately measured, the test result is more accurate, the operation is relatively more convenient, the consumption of asphaltene in an intermediate link is reduced, the calculation precision is favorably improved, the asphaltene deposition rule of an oil reservoir corresponding to a rock core is favorably and quickly determined, and the calculation efficiency is improved. And a more accurate theoretical basis is provided for CO2 injection development.
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