Abstract
Summary The 700 000 km2 main Karoo Basin in South Africa is considered a potential host for economically viable shale gas with more attention devoted to the hydrocarbon-rich Whitehill Formation. This Lower Permian sedimentary unit is regionally continuous as a highly conductive marker horizon on seismic data and conductive marker on electromagnetic data. The southeastern region of the basin has received least scientific studies with only few deep wells situated 200 km apart not enough to conclude basin structure. Historic seismic data collected by SOEKOR Pty Ltd between the 1960s and 1970s is re-digitized and integrated with deep well data and aeromagnetic data to draw comments on future exploration. The Basin is intruded by a large volume of dolerite intrusions that could affect the amount of recordable shale gas reserves and the magnetic data helps understand the distribution. The seismic data shows two strong reflectors as the Whitehill Formation and the basement contact. The magnetic data shows a major magnetic anomaly, known as the Beattie Magnetic Anomaly, which runs for a distance of 1000 km across South Africa. This study has shown that re-digitizing historic data can be useful.
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