驱油效率和体积波及系数的确定

从Buckley-Leverett 一维水驱理论出发得到了驱油效率与可采储量采出程度的数学关系,且驱油效率有最小值。在此基础上，进一步建立了实际油藏的驱油效率与可采储量采出程度的数学模型。利用采出程度驱油效率和体积波及系数三者关系。给出了体积波及系数与可采储量采出程度的计算公式。根 据驱油效率和体积波及系数计算公式.提出了注水开发后期体积波及系数和驱油效率潜力分析方法和应采取的开发方式。通过实际应用计算结果与已有成果相一致。

Determination of Displacement Efficiency and V olumetric Sweep Efficiency

In accordance with one dimensional waterflood theory of Buckley-Leverett,mathematical relationship between oildisplacement efficiency and recovery percent of recoverable reserves as well as minimum value of displacement efficiency arederived. And the numerical model of this relationship from a case of Liaohe field is developed accordingly. In addition, using therelationship among recovery percent,displacement and volumetric sweep efficiency, the equations for estimation of the volumetricsweep efficiency and the recovery percent of recoverable reserves are obtained, based on which the volumetric sweep efficiencyand the potential analysis of displacement efficiency in late stage of waterflooding along with development regime to be adoptedare proposed. The actual application is identical to the calculated results.