Presentation materials
Wicking, the spontaneous movement of liquid into a dry porous medium, is a critical phenomenon with wide-ranging industrial applications. Though wicking under isothermal conditions have been studied/modeled for more than a century, wicking under non-isothermal conditions remains relatively unexplored.
In an earlier study, we proposed, using the sharp-front approximation, three different...
China’s energy landscape is characterized by abundant coal resources, limited oil reserves, and a relatively low natural gas endowment. While coal reserves within a shallow depth of 500 meters are nearing depletion, deeper coal deposits, particularly those exceeding 1000 meters, account for 53% of the total reserves. These deeper reserves hold significant potential for gasification, which...
Local thermal equilibrium, meaning an instantaneous heat transfer between different phases, is often assumed when modeling heat transfer in porous media systems. However, for some technical applications as well as environmental systems, such as self-pumping transpiration cooling [2], fuel cells [4] and geothermal systems [3], heat exchange processes between the different phases may be of great...
In underground salt cavern hydrogen storage and carbon dioxide geological sequestration, water injection salt dissolution technology is widely used for artificial excavation and expansion of salt caverns. In dissolution-type geothermal energy development, this process plays a crucial role in determining reservoir permeability and hydrothermal flow behavior. During the actual water injection...
The method of carbon dioxide (CO2) injection in shale reservoirs has prevailed in recent decades, attributed to CO2 injection promoting shale gas (CH4) production while being sequestrated to eliminate the greenhouse effect for an environmentally friendly society. However, the efficiency of CO2-enhanced CH4 recovery (CO2-EGR) in shale reservoirs is influenced by geological factors, including...
The technology of injecting carbon dioxide into deep coal seams has the potential to enhance coalbed methane recovery. During the long-term interaction with coal seams, the impact of carbon dioxide on coal seam structures is one of the key research focuses in the field of improving coalbed methane recovery. This study uses coal samples from the Qinshui Basin in Shanxi Province as the research...
The warming climate is inducing changes in hydrological processes in the cryosphere that are not well understood. In this context, the proposed work seeks to advance our understanding of the pore-scale physics of fluid flow through subfreezing porous material such as snow, firn and permafrost. Such flow involves the complex interplay amongst interfacial flow (e.g. air-water), phase change...
Hydraulic fracturing is one of the key stimulation technologies of Gulong shale, Qingshakou Formation, China. Proppant has always been a vital part in the hydraulic fracturing operation, as it supports the fracture against the closure stress. A successful delivery of the proppant to the aiming fracture, as well as a long-term propping effect to a great extent determines the reservoir...
Mercury intrusion porosimetry（MIP）is a common but indirect technique for characterizing and analyzing pore structures. It provides pore/throat size distribution and capillary breakthrough pressure by measuring the injected mercury volume along with increasing injection pressures. However, our Micro-CT comparison results substantiated that MIP results deviate from real pore structure...
Engineered shear-thinning (ST) fluids, including polymer-based solutions, attracted considerable interest in subsurface applications for optimizing fluid circulation, transporting remedial amendments, and sweeping non-aqueous liquids in enhanced oil recovery (EOR). In this study, a stochastic analysis based on the Monte Carlo method is carried out to investigate how variations in fracture...
Flow-induced compaction of deformable porous media is characteristically non-uniform due to gradients in the fluid pressure. This talk explores the constitutive laws for effective pressure and permeability, which encode the rheology of the solid matrix, and identifies two ‘types’ of media based on the compaction behaviour in the limit of large applied fluid pressure drop. This classification...
