基于河道边界控制的窄薄油藏平面注采调整均衡驱替技术

Equilibrium Displacement Technique of Injection-production Adjustment in Narrow River Channel Based on River Boundary Control

由于河道边界对注水流线的遮挡,使得传统注采井间劈分系数的计算方法不适用条带状油藏。为实现条带状油藏注水开发的均衡驱替,以单河道线性井网为研究对象,综合考虑储层非均质性、河道形状、注采模式及地层能量等多种因素,应用镜像反应及势的叠加原理,提出了计算条带状油藏平面注采劈分系数的新方法。实例应用表明,新方法计算结果与生产动态特征及含水等值线较为吻合,能更准确地描述平面剩余油分布,确定合理劈分系数,计算方法更加快捷高效。

Due to the occlusion of river boundary to injected water streamline,traditional calculation method of injection-production dividing coefficient is not applicable to narrow river channel.To realize the equilibrium displacement in water flooding,the linear well network is studied.By taking reservoir heterogeneity,river shape,injection-production mode and formation energy into consideration,a new calculation method of injection-production dividing coefficient is put forward with the application of mirror reaction and superposition principle of potency.The study verifies that the obtained results are close to characteristics of production performance.And the description of plane remaining oil distribution and determination of appropriate producer-injector spacing and range of increasing liquid production are more accurate and the calculating method is more effective and convenient.