应用随机网络模拟技术研究微观剩余油的影响因素

通过用随机网络模型模拟研究油藏的微观驱替过程,在改变模型的孔、喉大小分布和调整模型的孔隙润湿比例等情况下,进行水驱油过程模拟,建立网络模型中的微观剩余油分布。在每一次模拟之后,计算剩余油饱和度和微观驱替效率,统计微观剩余油在孔径分布范围内的频率、含量。在此基础上分析孔隙网络特性对微观剩余油分布的影响。研究结果表明:水驱后微观剩余油分布主要受孔喉比、孔隙大小、润湿性,初始含油饱和度以及驱替效率等因素的影响。

Study on influencing factors of microscopic residual oil by using random network technology

With the random network technology,the study on res-ervoir micro-displacement has been made. By changing the model size distribution of pore and throat,and adjusting the proportion of pore wetting,the simulation of the oil displace-ment by water has been carried out,and the distribution net-work model of microscopic residual oil has been established.After each simulation,the residual oil saturation,micro-displacement efficiency,its frequency and content in pore ap-erture distribution could be calculated and...