CO2 huff and puff effect evaluation method, device, equipment and storage medium

By determining the type of crude oil and calculating the total carbon content before and after the injection, the first and second judgment parameters are determined, and the threshold range is set. This solves the problem that the evaluation of CO2 injection effect in the existing technology is not comprehensive and accurate enough, realizes a qualitative and quantitative evaluation method, and improves the accuracy and efficiency of the evaluation.

CN121963928APending Publication Date: 2026-05-01PETROCHINA CO LTD
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Patent Information

Application Number
CN202411522599.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-29
Publication Date
2026-05-01

AI Technical Summary

Technical Problem

The evaluation of CO2 throughput in existing technologies is not comprehensive or accurate enough, and the existing evaluation system is cumbersome to establish and lacks unified standards.

Method used

By determining the type of crude oil, collecting and calculating the total carbon number content of feedstock and non-feedstock types before and after the injection, determining the first and second judgment parameters, and setting a threshold range based on the feedstock type, the CO2 injection effect evaluation results are obtained through the threshold range.

Benefits of technology

It enables qualitative and quantitative evaluation of CO2 huff and puff effects, improves the accuracy and efficiency of evaluation, reduces evaluation costs, and can identify changes in the distribution range of crude oil composition and determine the strength of huff and puff effects through crude oil full hydrocarbon gas chromatography experiments.

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Abstract

The invention discloses a CO2 huff-puff effect evaluation method, device and equipment and a storage medium, the method comprises the following steps: firstly, judging crude oil types, and determining a judgment parameter I and a judgment parameter II by combining the sum of carbon number contents corresponding to the crude oil types before and after huff-puff and the sum of carbon number contents corresponding to non-raw material types before and after huff-puff; according to the method, on the basis of raw material types, a CO2 throughput effect evaluation result is obtained by combining a threshold range to which a judgment parameter I and a judgment parameter II belong. According to the method, the CO2 huff-puff effect is evaluated from the perspective of crude oil total hydrocarbon composition and light-medium-heavy component change rules, and the CO2 huff-puff effect is qualitatively and quantitatively evaluated through the microscopic change of crude oil total hydrocarbon components.
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