The permeability of porous rock is a crucial indicator evaluating its ability to allow liquids to pass through it. However, challenges are always encountered in measurement and prediction of permeability, including the complicated process of laboratory experiments and the refined 3D numerical reconstruction. In order to improve the efficiency and accuracy of permeability prediction, the digital twin modeling technology is proposed to generate homologous and heterogeneous digital sandstone models based on a single two-dimensional image in this paper. Comparison of the CT reconstruction with the digital twin of sandstone indicates that they are very similar in complementary solid-phase morphology of porous media, global parameters (total porosity, fractal dimension, tortuosity), and local parameters (porosity of sequence layer, pore and throat characteristics, coordination number). In addition, the permeability of CT reconstruction and ten digital twins are analyzed by using the Lattice Boltzmann Method. The results show that the permeability of digital twins is very stable and close to the CT reconstruction at three orthogonal directions. The findings in this study may provide an accurate, stable, rapid and economic method for predicting the permeability of porous media.

多孔岩石的渗透性是评估其允许液体通过的能力的关键指标。但是，在渗透率的测量和预测中总是遇到挑战，包括复杂的实验室实验过程和完善的3D数值重建。为了提高渗透率预测的效率和准确性，提出了数字孪生建模技术来生成同构和异构的数字模型。本文基于单个二维图像建立砂岩模型。CT重建与砂岩数字孪生的比较表明，它们在多孔介质的互补固相形态，整体参数（总孔隙度，分形维数，曲折度）和局部参数（层序孔隙度，孔隙度和孔隙度）方面非常相似。喉咙特征，协调号）。此外，使用莱迪思玻尔兹曼方法分析了CT重建和十个数字孪生的渗透率。结果表明，数字孪生的渗透率非常稳定，并且在三个正交方向上均接近CT重建。这项研究的发现可能为预测多孔介质的渗透性提供一种准确，稳定，快速和经济的方法。