Introduction to Geological Modelling
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.
- 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.