一种基于多尺度响应的低渗储层酸化效果优化方法及系统

By using a multi-scale response method to optimize the acidizing effect of low-permeability reservoirs, combined with XRD and XRF analysis of mineral composition, screening and selecting the best acid system and conducting core-level acid etching experiments, a multi-field coupled numerical model was constructed. This solved the problem of inconsistent parameter transfer in existing technologies and improved the accuracy and safety of acidizing stimulation of low-permeability reservoirs.

CN122065365BActive Publication Date: 2026-07-17CHINA UNIV OF PETROLEUM (BEIJING)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-04-22
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing acidizing technologies cannot achieve a coherent transfer from core-scale experimental parameters to wellbore-scale formation responses, resulting in poor acidizing effects in low-permeability reservoirs. Furthermore, the lack of quantitative support for multi-field coupling makes it impossible to accurately match the acid system with the reservoir mineral reaction, leading to insufficient optimization of construction parameters.

Method used

By using a multi-scale response method to optimize the acidizing effect of low-permeability reservoirs, combining XRD and XRF analysis of mineral composition, establishing the matching relationship of acid solution mineral reactions, screening and optimizing the acid solution system, conducting core-level acid etching experiments, constructing a multi-field coupled numerical model, and optimizing acidizing construction parameters.

Benefits of technology

It achieves systematization and closed-loop management of the entire acidizing process, accurately matches the optimal acid system, reduces the risk of ineffective acidizing, improves the targeting and safety of acidizing stimulation of low-permeability reservoirs, and provides a quantitative assessment of the acid spillover range and the stability of the surrounding rock.

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Abstract

本发明涉及石油与天然气工程领域，提供一种基于多尺度响应的低渗储层酸化效果优化方法及系统。该方法包括：对目标储层岩心样品进行物性表征与矿物组成分析，得到矿物质量分数集合；基于酸化潜力指数模型，计算多个酸液体系对应的酸化潜力指数，并建立酸液矿物反应的匹配关系集合；对候选酸液体系进行筛选验证，得到优选酸液体系及对应的反应动力学参数；将优选酸液体系作用于岩心，对作用前后的岩心参数进行定量对比测试，得到酸化响应参数集；基于多场耦合数值模型，对酸化反应过程进行模拟求解，得到时空演化结果；对酸化施工参数进行寻优，得到酸化施工优化参数组合及施工推荐参数库。本发明提升了酸化评价体系中的参数优化指导性。
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Citation Information

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