摘要
天然能量开发的边底水油藏能否通过人工强边水驱改善开发效果、进一步提高采收率是需要研究的课题。基于此,本文从人工强边水驱技术入手,分析研究人工强边水驱提高采收率的机理和开发敏感因素,取得的主要认识与成果如下:广泛调研岩心驱替实验、数模、物模等文献,分析研究人工强边水驱提高采收率机理、敏感因素,建立适合人工强边水驱的储层筛选界限。人工强边水驱改善采收率的机理主要体现在三个方面:提高驱油效率、改善波及系数和加速剩余油再聚集。地层倾角越大,人工强边水驱对采收率的改善作用越大。含油条带的宽度越窄,采收率曲线上升速度越快;剩余油饱和度越高,人工强边水驱的最终采收率也越高。本文探索了适合特高含水率边底水油藏强化水驱技术,对于提高特高含水率边底水油藏的采收率,改善开发效果作用明显,此举可为同类型高含水率油藏提高采收率提供新的技术思路和指导。
Whether the edge-bottom water reservoir developed by natural energy can improve the development effect and further enhance the oil recovery through artificial strong edge water flooding is a subject that needs to be studied.Based on this,this paper starts with artificial strong edge water flooding technology, analyzes and studies the enhanced oil recovery mechanism and development sensitive factors of artificial strong edge water flooding. And the main understandings and achievements are as follows, extensive research on core displacement experiment, numerical model, physical model and other literatures, analyze and study the enhanced oil recovery mechanism and sensitive factors of artificial strong edge water flooding, and establish the reservoir screening boundary suitable for artificial strong edge water flooding. The mechanism of artificial strong edge water flooding to enhance oil recovery is mainly reflected in three aspects, improving oil displacement efficiency, improve the sweep coefficient and accelerate the re-accumulation of remaining oil. The greater the formation dip, the greater the magnitude of artificial strong edge water flooding to enhance the recovery factor. The narrower the oil-bearing strip width, the faster the recovery factor curve rises. The remaining oil higher the saturation, the higher ultimate recovery factor of artificial strong edge waterflood. This paper explores the enhanced water flooding technology suitable for ultra-high water-cut edge-bottom water reservoirs, which has an obvious effect on improving the recovery factor of ultra-high water-cut edge-bottom water reservoirs and improving the development effect. It can provide new technical idea and guidance for the same type of high water-cut oil reservoir to improve the oil recovery.
作者
张天涯
ZHANG Tianya(School of Earth Sciences and Engineering,Xi'an Shiyou University,Xi'an Shaanxi 710065,China;Shaanxi Provincial Key Laboratory of Petroleum Accumulation Geology,Xi'an Shaanxi 710065,China)
出处
《石油化工应用》
CAS
2022年第10期13-18,共6页
Petrochemical Industry Application
基金
国家科技重大专项“致密油储层高效开发技术”,项目编号:2020ZX05046004。
关键词
特高含水率
边底水油藏
人工强边水驱
强化水驱
采收率
ultra-high water cut
edge and bottom water reservoirs
artificial strong edge water flooding
enhanced water flooding
recovery factor
