含水率与采出程度关系理论曲线建立新方法

New method for studying theoretical relationship curve between water cut and recovery percent

张宏友 邓琪 王美楠 王月杰

中海石油（中国）有限公司天津分公司渤海石油研究院，天津 300459

Bohai Oilfield Research Institute, CNOOC Ltd., Tianjin 300459, China

针对相渗曲线法计算含水率与采出程度关系理论曲线存在的问题，以均质油藏反九点注采井网为基础，利用流管模型分别建立无水采油期采出程度、含水上升期含水上升率的理论变化关系式，建立了一种新的含水率与采出程度关系理论曲线研究方法。实例应用表明，利用新方法建立的含水率与采出程度关系理论曲线，能够评价水驱油藏的开发效果，评价结果客观合理，值得推广应用。

Since the relative permeability curve methods cannot accurately describe the relationship curve between water cut and recovery percent, based on nine-spot well pattern of the homogeneous reservoir, this paper establishes the theoretical formula of recovery percent in water-free stage or water-rising stage by using the stream tube model. A new method was proposed to analyses the theoretical relationship curve between water cut and recovery percent. The application in Bohai Oilfield shows that the theoretical relationship curve between the water cut and recovery percent built by the new method can reasonably evaluate the development effect of waterflooding reservoirs and be worth popularizing.

10.6056/dkyqt201803015