GeoChem·VI puts USGS PHREEQC geochemical modeling for Class VI CO₂ storage directly in your browser — no installation, no license. Load the built-in example site, adjust the brine, mineralogy, or injection stream, and simulate injection period plus a century of monitoring: pH evolution, mineral trapping, carbon partitioning, porosity–permeability change, and a sensitivity tornado of the key drivers. This evaluation covers the injection-zone batch model — the full AquaNRG workflow adds confining-zone / seal-integrity simulation, 1-D reactive-transport modeling, site-specific thermodynamic QA/QC, and permit-ready documentation. Book a demo at ccus.ai.