蒸汽驱开发采收率预测新方法

本文利用热采数值模拟手段和回归分析方法研究了油层厚度、原油粘度、含油饱和度、渗透率变异系数、油层净决厚度比 油藏埋深等主要油藏参数对蒸汽驱开发效果的影响，并且得到了蒸汽驱开发采收率与诸油藏参数之间的关系式，作出了它们之间的关系曲线。在此基础上，进一步得到了不同稠油油藏汽驱采收率预测公式。通过国内外几个蒸汽驱先导试验的实例证明了所得预测公式的有效性。

A NEW MTEHOD OF PREDICTING OIL RECOVERY FACTOR OF STEAM DRIVE

In the heavy oil recovery by steam injection, several main reservoir parameters, such as net pay thickness, oil viscosity, oil saturation, permeability variation factor and the ratio of net pay thickness to gross thickness etc., affect the steam drive results to some extent, respectively. With the help of thermal recovery numerical simulation and regression analysis, the effects of those main reservoir parameters on steam drive are studied in this paper. The relationship between oil recovery and each of those main reservoir parameters has been established, and the regression curves have also been drown out. So how the main reservoir parameters affect steam drive results becomes very clear. Based on these relational expressions, the predictive equation of oil recovery of steam drive has been put forward, which is confirmed by three examples at home and abroad.