低渗透油藏水驱指标评价方法研究及应用

Low-permeability Reservoir Water Displacement Method and Application of Indicators To Assess

通过基于油水两相流动的驱替理论和方法，考虑启动压力梯度，推导了低渗透油藏注水开发的甲型水驱曲线数学模型。从水驱曲线出发，推导含水率、含水上升率、存水率等水驱指标的理论公式；并运用考虑启动压力梯度的理论曲线与实际曲线对比方法评价油田开发效果，评价结果客观适用，初步得到了适合长庆低渗透油藏特点的水驱指标评价方法．

In this paper, based on the oil-water two-phase flow of the displacement theory and method, given the starting pressure gradient, low permeability reservoir water derived influenza developed mathematical models of water displacement curves, from the water drive curve deduced moisture content, water content increased rate, the water storage rate indicators of water flooding the theoretical formula; and used to consider start-up pressure gradient curve of the theoretical curve compared with the actual method of evaluation of effects of oil field development, evaluation and objective application of the results of a preliminary. Changqing has been suitable for the characteristics of low permeability reservoir of water Flooding index evaluation method.