Abstract: Digital cores can be used for the fine characterizations of rock microstructures.Currently, this technology is crucial for analyzing rock microstructures and rock physical properties.Generally, the methods of modeling digital cores can be divided into physical experimental methods, numerical reconstruction methods, and combination fusion methods.In this study, a digital core and digital wellbore are introduced from the aspects of model building and well logging applications.The digital core model building methods for single-and double-pore medium systems, multiporous structures, and multiscale fusion are summarized.The applications of digital core modeling in electrical, acoustic, seepage, and nuclear magnetic resonance properties are discussed.Because the modeling and numerical simulations utilized in the digital core technology are mostly concentrated at the micro or even nano level, exploring the petrophysical properties at the microscale cannot effectively explain the influence of macro factors(rock structure, stratigraphy, fractures, etc.) on the petrophysical properties.Notably, the digital wellbore modeling technology is an emerging technology adopted to construct three-dimensional digital wellbores based on multiscale digital cores combined with electrical imaging, conventional logging, and other information.This technology, combined with nuclear magnetic technology, mercury pressure, conventional logging, and other information, can reflect continuous changes of well periporosity on a large scale.Moreover, it can be applied to the simulations of electrical, elastic, and seepage characteristics and provide virtual logging for well seismic combinations, which can be used to explain the influence of various micro and macro factors on the petrophysical properties of the formation.It is also expected to serve as the main auxiliary tool for the processing and interpretation of three-dimensional logging data in the future.