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实证研究是水驱规律曲线方程现场应用的基础,在室内实验的基础上,对现有线性水驱方程进行了优选,提出采用包络线切线法预测储量增长趋势。该方法对所有历史数据呈现良好的线性关系,预测的半对数水驱曲线符合数值模拟结果,即呈现反“S”形特征。油田开发始终是在人们的干扰下进行的,系统特征始终在变化,利用包络线切线法能更好描述油藏的当前状态与特征。现场实际资料分析表明,利用该方法分析评价水驱油田开发措施效果是可靠的。
Empirical research is the foundation of on-site application of the equation law of waterflooding. Based on the laboratory experiments, the existing linear waterflooding equation is optimized, and the trend of the reserve growth is predicted by the envelope tangent method. The proposed method shows a good linear relationship with all the historical data. The predicted semi-logarithmic water flooding curve accords with the numerical simulation results, that is, the anti-S-shaped feature appears. Oilfield development has always been carried out under the interference of people. The characteristics of the system are always changing. Using the envelope tangent method can better describe the current state and characteristics of the reservoir. The actual field data analysis shows that it is reliable to use this method to analyze and evaluate the effect of development measures in the waterflooding oilfields.