A dynamic stabilizing foam fluid deep profile control method

By designing a dynamic and stable foam system and an alternating slug injection method, the problem of long-term stability of foam in porous reservoir media was solved, achieving efficient and long-term regulation and drive of foam in deep formations and improving oil recovery.

CN122407145APending Publication Date: 2026-07-17CHINA UNIV OF PETROLEUM (BEIJING)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA UNIV OF PETROLEUM (BEIJING)
Filing Date
2026-06-08
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing foam-based oil recovery systems are difficult to maintain stably in porous reservoir media for extended periods, resulting in foam's ineffective function in deep formations and impacting oil recovery rates.

Method used

A dynamic stable foam system is designed by combining a high-efficiency foaming agent with a dynamic stabilizing agent to form a dense and uniform foam. Combined with an alternating cyclic slug injection method, a pressure fluctuation field is constructed to achieve dynamic stability and regeneration balance of the foam in deep formations.

Benefits of technology

It significantly enhances the dynamic stability of foam in deep formations, prolongs the effective action time and range, and improves oil recovery rate.

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Abstract

本申请提供一种动态稳定泡沫流体深部调驱方法，涉及油田高效开采技术领域。包括：设计动态稳定泡沫体系与调驱段塞；注入试注体系；达到试注段塞注入量时，注入前置液；达到前置段塞注入量时，周期性注入主段塞动态稳定泡沫体系和目标粘度流体，或周期性注入主段塞动态稳定泡沫液相和气相；在达到主段塞注入量时，注入后置保护液；达到后置保护段塞注入量时注入顶替液；在顶替液注入量达到顶替段塞注入量时，进行泡沫稳定性强化注水。通过以上体系的依次注入，在油藏深部借助压力波动促进泡沫的破灭到再生过程的动态平衡，提升泡沫体系长时间长距离运移过程中的动态稳定性，从而扩大波及范围，延长有效驱油周期，提高原油采收率。
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