Permian basin floor fan systems of Karoo, South Africa
The objective of the course is to understand the lithofacies and architectural relationships of the Permian basin floor fan system in the Tanqua-Karoo area (Western Cape, South Africa) from outcrops, cores and logs.
This area contains some of the World’s best basin floor fan exposures. It has been the topic of a EU-sponsored research project in which a large amount of outcrop data has been acquired and seven research boreholes were drilled, cored and logged with state-of-the-art logging suites. This material and the main results of the project will be shared with the participants. Hiking the succession from basinal fans across the shelf edge to prodelta deposits is a highlight of the course.
Course Base: Inverdoorn Game Lodge.
- Ordovician to Devonian succession
- Overview of Western basin margin and its development
- Evening lecture on basin evolution
- Proximal exposures around Bizansgat, Klein Hangklip and Ongeluks Rivier (Fans 5 and 3).
- Channel geometries, levees, collapse structures, paleoflow relationships, thin-bedded overbank deposits
- Kleine Rietfontein; overview and drive through Fans 1-4
- Study internal architecture; sedimentary structures; and Fan 3 sheet sands
- Kleine Gemsbokfontein with Kanaalkop channel fill (Fan 3); compensational stacking (Fan 2)
- Loskop area with transitional elements (Fan 3)
- Zoetmeisjesfontein north for Fan 3 evolution and sheet development
- Lobe architecture, beds-elements-lobe associations, local channelization and linked debrites
- Dadelbom: Fan 4 outcrops
- Some well locations and observing shelf-edge deposits on Pienaarsfontein (time permitting)
- Inverdoorn core workshop: logs and borehole images, comparison with outcrops;
- Discussion on how well data and outcrop analogues are used for reservoir modelling.
- What is new from cores/logs that is not observed in outcrops?
- Skoorsteenberg, Klipfontein area: hike entire sedimentary succession from basin floor fans to slope deposits, shelf edge transition and prodelta deposits
De Ville Wickens following the completion of his B.Sc. Honours degree in Geology at the University of Stellenbosch, De Ville started his career with the Geological Survey of South Africa (now Council for Geoscience) in 1976 as a field geologist, primarily responsible for regional mapping. After 12 years with the Geological Survey, during which time he also received his M.Sc. degree from the University of Port Elizabeth, he took up a newly created post as specialist sedimentologist with the state petroleum exploration company, SOEKOR (now PetroSA), in 1987. As specialist, his work involved close cooperation with all disciplines related to the exploration for oil and gas in the offshore along the West and South coast of South Africa.
The discovery of oil in turbidite reservoirs in offshore Bredasdorp Basin led to an extensive land-based research program on the deep-water fan complexes of the southwestern Karoo Basin, initially in collaboration with Arnold Bouma of Louisiana State University and later with the Strat Group of the University of Liverpool. De Ville’s interest in the deltaic and deep-water systems of the Permian Karoo Basin led to a Ph.D. via the University of Port Elizabeth in 1994. He left SOEKOR in 1996 where after he continued to serve the national and international petroleum industry as consultant, mainly via field research and training in the form of field seminars. After 3 years of consultancy for all the major oil and gas companies of the world, he joined the Department of Geology at the University of Stellenbosch as Senior Lecturer in sedimentary geology, a position initiated and supported by the local petroleum industry. Apart from a full under- and post-graduate programme, he continued leading and co-leading numerous field seminars in which more than a thousand geoscientists have been involved up to now. De Ville took early retirement from Stellenbosch at the end of 2007 to focus on and to broaden his consultation business.
De Ville’s training has been in sedimentary geology with specialization in deep-water deposits. He is a highly experienced field geologist with a strong background in petroleum exploration, teaching and academic research. He is an Active Member of the American Association of Petroleum Geologists and enjoys fellow membership status with the Geological Society of South Africa.
Petroleum geologists, general geologists, sedimentologists, reservoir modellers, reservoir engineers, seismic interpreters.