文中油田不稳定注水系统研究及应用

Discussion and Application of Transient Waterflooding System in Wenzhong Oilfield

田玲钰¹,刘亚勇²,郑宇印³,孙全元²

Tian Lingyu ,Liu Yayong, Zheng Yuyin, et al

1. 中原油田分公司勘探开发科学研究院,2. 中原油田分公司采油一厂,3.中原油田分公司采油工程技术研究院

Research Institute of Petroleum Exploration and Development , Zhongyuan Oilfield Company , SINOPEC, Henan 457001 , P. R. China

不稳定注水是一种适用于层状非均质油层的开发方法,其原理是利用注水量或注水压力的波动,在油层中建立不稳定压力降,在不同渗透率小层间产生不稳定交渗流动,并使各小层中的液体重新分布,从而提高注入水在地层中的波及体积。文中油田25 东块采用不稳定注水取得显著效果。本文系统地叙述了不稳定注水的原理、开发方法、特点及适用条件,详细分析了不稳定注水参数对其效果的影响,为复杂断块油田高含水后期的控水稳油,提供了一个可以借鉴的实例。

Transient waterflooding technique is one of the methods of waterflooding ,which is suitable to exploiting the layered inhomogenious formations , its principle is that the pressure fluctuation made by the cyclic wave of the amount of injecting water can cause unstable inter - flowing of the formation fluid between the small layers which have different premeability. Thus , the waterflood swept area increase. Good results have been achieved in the east of Block 25 of Wenzhong Oilfield by performing transient waterflooding. This paper discusses the principle ,methods ,characters and applicable conditions of transient water flooding in details , and analysis the enflunce fo the effection when waterflooding parameters varies. It’s a good reference to oil recover of complicated oilfields in high water cut stage.