The evaluation of reservoir properties such as geometry, porosity and permeability requires knowledge of the depositional environments that created the rocks, their spatial variability and temporal change. In this short course we will restrict ourselves to the analysis of physically formed sedimentary structures, such as cross-stratification. These are the “building stones” of any depositional facies or depositional sequence. A proper and accurate interpretation of these “building stones” in terms of bedforms and flow conditions is essential for understanding the origin and development of any depositional facies or depositional sequence.
Knowledge of the physical background of the preserved structures is a prerequisite to understand the mutual relations of structures found in cores that guide us in interpretation solutions and that help us to keep our imagination of the palaeo-environment within realistic borders.
Objectives and Contents
This short course will present an in-depth discussion on the relationship between sedimentary structures, the different bedforms and their related hydrodynamic or aerodynamic conditions. The participants will receive a good basic knowledge of this relationship and will be able to apply this in the interpretation of sedimentary structures in outcrop and in cores. Lectures will alternate with practical sessions in which sedimentary structures in pictures of high-resolution lacquer peels are discussed, with emphasis on their diagnostic value in the recognition of sedimentary environments in outcrop and core.
- Fundamentals of flowing water and sediment transport
- Bedforms and sedimentary structure formed by unidirectional flow
- Influence of wave action on bedforms and sedimentary structure
- Influence of tides on sedimentary structures
- Aeolian sedimentary structures
- Diagnostic criteria for the recognition of fluvial, tidal, transitional fluvial-tidal, coastal and aeolian sedimentary environments in outcrop and core
Janrik van den Berg
Current position: Assistant Professor Utrecht University (guest); independent consultant; associate ENRES International.
- River and estuarine morphology and sediment transport
1968-1973 Research assistent Dept.of Physical Geography, Utrecht Univ., Netherlands
1974-1980 Lecturer at the Geology Dept., Utrecht Univ.
1980-1986 Project engineer Rijkswaterstaat-Deltadienst, Ministry of Public Works, Zierikzee, Netherlands
1986-1988 Scientific member of staff Rijkswaterstaat-Dir. Zeeland, Ministry of Public Works, Middelburg, Netherlands
1988- 2007 Assistant Professor Dept. of Physical Geography Utrecht University
1989-1996 Employee of Svasek B.V. Coastal and Harbour Engineering Consultants, Rotterdam, Netherlands
2006- Director Morphodynamics (consultant), Zeist, Netherlands
2009- Associate ENRES International, Huis ter Heide, Netherlands
Who Should Attend
This short course is appropriate for geoscientists involved in core descriptions and core evaluations, borehole image interpretations. It is also recommended for those who use existing core description for further evaluations, specifically sedimentologists, stratigraphers and reservoir geologists.