Reinjection represents a fundamental strategy for sustainable geothermal reservoir development. During reinjection, reservoirs are subjected to pronounced physicochemical disequilibrium, under which complex water–rock interactions render long–term behavior difficult to predict. This review synthesizes mineral reactions and reservoir dynamic responses from a geochemical perspective. The interplay between reaction kinetics and fluid transport is examined using the Damköhler number, elucidating the spatiotemporal evolution of reactive transport. The dissolution–precipitation behaviors of silicate, carbonate, and sulfate minerals are evaluated, highlighting their distinct roles in governing long–term structural reorganization, short–term permeability variability, and rapid clogging. The influence of mineral reactions on pore structure evolution and the development of nonlinear porosity–permeability relationships is examined, alongside commonly used constitutive models and their inherent limitations. Multiscale characterization approaches for porosity–permeability evolution and the distinct responses of different reservoir types are reviewed. The chemo–mechanical coupling induced by water–rock interactions and its implications for reservoir stability are addressed. This work establishes a unified conceptual framework linking mineral reactions, fluid transport, and reservoir evolution, providing a basis for optimizing reinjection strategies and improving long–term geothermal system performance.

Reservoir screening for geological CO₂ storage must balance hydraulic performance against geochemical reactivity, but these attributes are rarely compared under a common numerical design. We used a unified two-dimensional radial TOUGHREACT v3.32/E CO₂N benchmark to compare marble, granite, and sandstone at 75 and 100 °C. Six cases shared the same geometry, brine salinity, flow functions, boundary conditions, and nominal 12.5 kg/s injection schedule. Injection lasted 10 years, followed by post-injection evolution to approximately 100 years. At 10 years, a finite-domain component balance placed 86.51–87.66% of injected CO₂ in the gas phase and 12.39–13.47% in incremental aqueous CO₂. Closure errors were 0.0025–0.0836%, and S_mCO₂ remained zero within output precision. Sandstone produced the lowest overpressure (10.7–12.0 bar), marble provided the strongest carbonate buffering, and granite showed the largest pressure and acidification penalties. A G75 rerun with half the maximum time step reproduced the 10-year metrics but reduced the approximately 100-year local porosity extreme from 18.224% to 0.171%, showing that the original long-term extreme was not time-step robust. Sensitivity tests identify injection rate as the primary control on pressure and plume extent, whereas reactive surface area mainly controls carbonate-reaction magnitude. These results show that lithology does not rank along a single performance axis: robust screening must jointly evaluate injectivity, plume footprint, phase partitioning, and post-injection reaction pathways.