挥发性油藏注气提高采收率研究
Study on Enhanced Oil Recovery by Gas Injection in Volatile Oil Reservoirs
摘要: 挥发性油藏常具有深层、低渗、高温、高压等特性，注水开发面临诸多挑战，注气成为提高其采收率的关键手段。围绕挥发性油藏注气展开研究，通过岩心驱替实验，重点探究不同注入气类型、注气时期及注气方式对开发效果的影响。本文在注入气类型方面，通过对比实验分析干气、CO2及N2等不同气体的驱油性能，明确富气因与原油混相能力强可显著提升采收率，并开展混相驱长岩心驱替实验，评价混相条件下原油采收率。同时，借助油藏工程方法，结合现场实际注入情况，优化注采参数。根据油藏天然能量评价结果，综合考虑目标区块油藏天然能量条件、采收率条件、注入技术条件、开发效益条件，进行高效开发对策研究，有效提高了挥发性油藏采收率，为该类油藏高效开发提供了有力技术支撑与理论依据。
Abstract: Characterized by deep burial, low permeability, high temperature, and high pressure, volatile reservoirs present significant challenges for waterflood development, making gas injection a crucial method for enhanced oil recovery. This research focuses on gas injection in volatile reservoirs, employing core flooding experiments to investigate the impacts of injected gas types, injection timing, and injection methods on development efficiency. Regarding gas types, comparative experimental analysis reveals the oil displacement performance of dry gas, CO2, and N2. Results demonstrate that rich gas significantly enhances recovery due to its strong miscibility with crude oil. Miscible flooding experiments using long cores further evaluate oil recovery under miscible conditions. Concurrently, reservoir engineering methods are applied alongside field injection data to optimize injection-production parameters. Building on reservoir natural energy assessment, we comprehensively consider four key factors—natural energy status, recovery potential, injection feasibility, and economic viability—to formulate efficient development strategies. This integrated approach effectively improves recovery in volatile reservoirs, providing robust technical support and theoretical foundations for the efficient development of such reservoirs.
文章引用：陈潇, 凌霄, 肖岸锋, 秦子魁, 李超然, 李熙玄. 挥发性油藏注气提高采收率研究[J]. 矿山工程, 2025, 13(5): 1078-1090. https://doi.org/10.12677/me.2025.135122

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