孔隙尺度水驱油模拟及残余油研究

Microscopic Residual Oil Study of Water Flooding Based on Pore- scale Modeling

采用微CT扫描技术建立来自WD区块4块岩样的三维映射网络模型,并对其进行水驱油模拟。基于微观驱油效率和含残余油孔隙比例随各因素的变化关系,对影响孔隙中残余油形成的因素及其影响机理进行定性分析。分析结果表明,孔隙大小、孔隙形状、孔喉比以及配位数分别对孔隙中残余油形成的可能性及残余油饱和度有不同的影响。

This study constructed four three- dimensional network models derived from the real samples of Section WD,and water flooding simulation was conducted using these models. Based on the indexes including microscopic displacement efficiency and the ratio of the pores containing residual oil,the influencing factors of residual oil in pore and their mechanism have been qualitatively studied. The result shows that the network models reflect the real samples well. The pore size,shape of pore,aspect ratio and coordination number have different impact on the formation of residual oil in pore.