Bentheimer Sandstone

The effect of pore-scale heterogeneity on non-Darcy flow behaviour is investigated by means of direct flow simulations on 3-D images of Bentheimer sandstone and Estaillades carbonate. The critical Reynolds number indicating the cessation of the creeping Darcy flow regime in Estaillades carbonate is two orders of magnitude smaller than in Bentheimer sandstone, and is three orders of magnitude smaller than in the beadpack.

本研究通过对本泰姆砂岩（Bentheimer sandstone）与埃斯泰亚德碳酸盐岩（Estaillades carbonate）的三维图像（3-D images）开展直接流动模拟（direct flow simulations），探究了孔隙尺度非均质性（pore-scale heterogeneity）对非达西流动特性（non-Darcy flow behaviour）的影响。结果表明，埃斯泰亚德碳酸盐岩中表征层流达西流态（creeping Darcy flow regime）终止的临界雷诺数（critical Reynolds number），较本泰姆砂岩小两个数量级，较颗粒充填床（beadpack）小三个数量级。