海上油田波及系数修正新方法

A new method to correct the sweep efficiency in offshore oilfields

在数值模拟分析相渗曲线对波及系数影响规律基础上建立了海上油田波及系数修正新方法,该方法综合考虑了水油流度比、渗透率变异系数、原油粘度、相渗曲线形态等因素影响,具有较高的计算精度。实例分析表明,在水油流度比大于10的情况下,新方法比行业标准具有更好的适用性。

A numerical simulation was used to ana lyze the impacts of relative-permeability curve on sweep efficiency, from which a new method to cor rect the sweep efficiency in offshore oilfields was es tablished. This method has comprehensively taken multiple factors into consideration, such as water/oil mobility ratio, permeability-variation coefficient, oil viscosity and relative-permeability curve shape, and is higher in calculation accuracy. According to some example analyses, the new method is greater in ap plicability than the industry standard method when water/oil mobility ratio is larger than 10.