NITEC developed a complex reservoir simulation for the world’s only helium gas storage field. The storage operation is located in a natural fracture and faulted carbonate formation. NITEC performed an integrated reservoir characterization (stratigraphy, structure, petrophysics, and seismic) as well as using its fracture characterization technology to develop the dual-porosity 4 component composition simulation model. The model successfully history match 78 years of operations with over 3,500 pressure points and 7000 gas composition points. The model is still in use today for prediction the helium recovery as the storage field is being depleted and abandoned.