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
Petroleum geologists, general geologists, sedimentologists, reservoir modellers, reservoir engineers, seismic interpreters.