Underground Hydrogen Storage Simulation

I need a CMG-based reservoir simulation that models underground hydrogen storage with CH4, CO2, NOx, acting as the main cushion gas. The focus is on the storage phase, but the model must still cover injection and withdrawal so that I can analyse the complete cycle when needed.

What I expect you to deliver:
• A working CMG dataset (GEM) configured for hydrogen-CH4, CO2, NOx interactions in a chosen porous formation.
• Sensitivity runs that let me quantify:
– Hydrogen recovery percentage
– Hydrogen purity after withdrawal
– Stability of hydrogen during injection, storage, and withdrawal
• A concise technical memo explaining your modelling approach, assumptions, key correlations, and the numerical settings you used to control dispersion, diffusion, and phase behaviour.
• Plots and tables summarising the above metrics, ready for inclusion in a report.

I’ll ask for additional parameters as the study progresses, so please set up the model so it can be extended without major re-work.

Ideal background: prior hands-on experience with CMG, familiarity with gas mixing, hydrogen embrittlement, or underground gas storage studies.

Let me know your relevant project examples and how quickly you can turn around an initial calibrated model.