The Amadeus, Arrowie, Officer and Warburton Basins contain pre-Permian sediments with petroleum potential. The Cooper and Pedirka Basins have petroleum potential in Permian sediments. The Murray Basin' contains Devonian, Permian and Cretaceous sediments with some potential. The Cooper Basin has established reserves of 6.5 t.c.f. raw gas in place in 16 fields from which Adelaide and Sydney markets will be served. Another seven small or unassessed fields have been discovered, Further exploration should probably double the established reserves. Wildcat drilling success is 1 in 3 so far. The Pedirka Basin is in an early stage of exploration. The geological elements of good sandstone reservoir beds, coaly source beds, fold and fault structures and geological history analogous to the Cooper Basin gives it great attraction to the explorationist. The Amadeus Basin is an established petroleum province with gas iand gas/oil deposits established in the enormous fold structures of the Palm Valley and Mereenie Fields respectively. Further prospects remain to be drilled but prior to drilling a market must be established for these resources which are in the centre of the Continent. Many geological and geophysical features of the Officer Basin are analogous to the Amadeus Basin but it is virtually unexplored. The basin is a high cost, high risk, possible high reward exploration area. The Arrowie Basin has ample evidence of oil generation and offers good prospects in Cambrian rocks at reasonable exploration costs. The Murray Basin offers lower potential but is cheap to explore and close to coast and refineries. The Warburton Basin has interesting geological possibilities for petroleum accumulation but would require expensive exploration. The petroleum potential of these mainly Palaeozoic Basins of Central and South Australia warrants more intense exploration than currently projected except, perhaps, in the Cooper Basin where an active programme is foreseen.