Sadam Hussain, PhD Petroleum Engineering Student at the Hildebrand Department of Petroleum and Geosystems Engineering, the University of Texas at Austin. I am working on reservoir simulation of underground hydrogen storage in carbonate reservoirs, CO2-EOR and storage in unconventional reservoirs, and CO2 storage in high salinity carbonate aquifers. Previously, I have worked as reservoir engineer for 10 years in the oil and gas industry. My areas of expertise are reservoir engineering and simulation, history matching and forecasting, oil and gas reserves evaluation, pressure/rate transient analysis, field development planning, and project economics. My research domains are full-physics reservoir simulation of CO2 and hydrogen storage in carbonate reservoirs including geochemistry and geomechanics, natural/hydraulic fracture modeling (DFN and EDFM), wellbore leakage quantification through legacy wells, hydrogen production from mature oilfields, natural/stimulated hydrogen production, CO2-EOR and chemical EOR in unconventional reservoirs.