The Falcon NR about the Karoo basin has the following footnote: *Geological well completion report of borehole CR 1/68, Leith, M.J., 1970, Soekor Drilling Geology
While I couldn't find that particular report available online, I did manage to find the following one which, while maybe not as positive, does give some detail about the basin.
http://superiormanagement.net/FTP/Thelma%20and%20Utrecht%20Area/PSV%201650/Well%20Completion%20Report%20PSV%201650.pdf
LeonRedbone