“tNavigator became a software of choice for reservoir studies carried by TGT Oil & Gas Services company and Sofoil company in 15 countries, including Russia, USA, South-East Asia and Middle East. The multicore-optimised design of tNavigator solver opens the gates to full-field simulations on original geological fine-grid and allows bypassing detrimental upscaling procedures. The simulation time is reduced from weeks to hours. The time and space resolution of sector modelling has substantially increased and now avails very accurate side-track modelling and production forecast which form the basement for drilling justification. The enhanced computation speed allows simulating short-term pressure responses with tiny time steps and micro-fine grid, which opens new horizons in cross-well pressure pulse testing and account the actual geology of the area, actually well locations and trajectories, actual production history and interference between wells. tNavigator is the first software on the market to provide user-friendly calibration facility for the holes where along-hole flux profile has been measured, which allows integration of time-lapse production logging data into a reservoir model and corresponding changes over time.”