Deep subsurface energy systems are inherently multiphysics, nonequilibrium, and heterogeneous featuring rock matrix, fractures, fluid interactions, reactions at mineral/fluid interfaces, and various transport processes. Understanding of these factors is paramount to enable more efficient strategies for unconventional/geothermal energy recovery and CO₂ sequestration. In these technologies, the central goal is to optimize flows within host rock and fractures. However, injected/formation fluids are often at disequilibrium from the reservoir, leading to chemical alterations across multiple spatiotemporal scales. There is a noticeable lack of studies that quantitatively investigate the coevolution of geochemical and transport properties within rock fabric under such conditions. In this session, we invite original research focusing on (i) improved understanding of the underlying physics and (ii) representation of relevant processes within quantitative models to predict transport of reactive species in rocks. We broadly solicit abstracts with backgrounds in theoretical, numerical, experimental, and imaging related to fluid transport in subsurface systems.