新疆石油地质

新疆石油地质 ›› 1996, Vol. 17 ›› Issue (2): 156-162+204.

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周期性水动力法提高砾岩油藏原油采收率的机理

杨学文   

  1. 新疆石油管理局百口泉采油厂 834011
  • 收稿日期:1995-12-27 出版日期:1996-06-01 发布日期:2020-07-27
  • 作者简介:杨学文 高级工程师 油藏工程

MECHANISM OF ENHANCING OIL RECOVERY FACTOR IN CON-GLOMERATE RESERVOIR BY USING PERIODIC WATER INJECTION METHOD

Yang Xuewen   

  1. Baikouquan Production Com pany, Xinjiang Petroleun Administration Bureuu. Karamay 834011
  • Received:1995-12-27 Online:1996-06-01 Published:2020-07-27
  • About author:Yang Xuerven. Senior Engineer. Reservoir Engineering

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摘要： 对于非均质程度很高的砾岩油层,采用周期性注水方式可以大幅度地提高原油采收率。周期性脉冲式注水可以在地层中造成不稳定压力状态,在薄含水层中造成剩余压力。借助于毛细管力可以使含油薄层的含水饱和度提高,增加水淹层的含油饱和度。根据砾岩油藏具有高渗透主力油层连片集中分布的特点,可将已有的面积注水井网按高渗透层的主体延伸方向,组合为排状注水井网,然后针对地下不同情况实施定向、轮向周期性水动力注水。采取这种注水方式可以进一步扩大注水波及系数,提高原油采收率。

关键词: 砾岩油气藏, 周期性注入, 注水, 毛细管压力, 渗透率, 波及系数, 采收率

Abstract: For a severe conglomerate reservoir heterogeneity, cyclic water injection process may su bstantially enhance oil recovery. Cyclic pulse injection may cause the tran-sient pressure regime in the reservoir and remaining pressure in a thin aquifer. Under the capillary force. oil saturation in the thin layer and water -out reservoir can increase. Be-cause of the unscattered distribution of high- permeability main productive beds in the con-glomerate reservoir. it is suggested that the existing areal waterflood patterns be convert-ed to patterns in rows along the main per meability trend. and intermittent water flooding process in which rows of injectors work alternatively be implemented to further improve sweep efficiency and oil recovery.

Key words: Conglomerate reservoir, Cyclic injection, Waterflooding, Capillary pressure, Permeability, Sweep efficiency, Recovery factor