Course objectives: Intention of the course is to give an overview of geological modelling of oil and/or gas accumulations previous to reservoir simulation with practical work being performed on a simplified geological workflow. Understanding of the process that precede the reservoir simulation is a skill that future reservoir engineers would largely benefit from.

Course content: 

• Introduction to different types of horizons that can being mapped (modelled) in the subsurface;
• Well data 1 (data on lithological composition from cuttings and cores);
• Well data 2 (data on petrophysical properties from laboratory measurements on core samples and from well-log interpretation);
• Surface data (from reflective seismic);
• Outcrop data;
• Linking surface and well data (time to depth conversion);
• Different approaches to mapping the spatial distribution of reservoir rock properties;
• Defining model resolution, impact on result quality versus time consumption;
• Calculation of oil and/or gas reserves based on grid cell model.

Learning outcomes at the level of the course:

• Outline basic types of horizons that are mapped in the subsurface and their significance in geological modelling;
• Assess different data sources used for construction of the geological model;
• Create a simplified geological model of an oil and/or gas reservoir;
• Recognize the impact of usage of different mapping algorithms used in mapping of the spatial properties of the model;
• Identify the appropriate resolution of the model for optimal modelling results;
• Calculate the oil and/or gas in place in cell-based model of an oil/gas accumulation.