Researchers are studying the properties of fluid flow in 3D porous rocks, with a focus on predicting permeability and understanding the geometric properties of these complex systems. Various methods are being explored, including fractal analysis, convolutional neural networks, and lattice boltzmann simulations, to better understand the physical properties of porous rocks. The studies aim to improve understanding of heterogeneous and anisotropic porous media, including the effects of stress and microstructure on fluid flow properties.