The course starts with the presentation and discussion of the main steps of 3D static modelling workflow. 3D geometrical modelling is developed with emphasis on grid types and eventually log data integration is approached. Practical applications and the core functionality of basic geostatistical techniques (kriging variogram simulations) is introduced. The course is focused on the use of the most suitable geostatistical approaches in various depositional environments (Fluvial Delta and Deep marine) regarding both facies and petrophysical modelling. The course closes with some insights of hydrocarbon volume calculation risk analysis and grid optimization for dynamic simulation purposes.