The Bulburrum Prospect is located on the eastern side of Eromanga Basin which is composed of Jurassic to Cretaceous terrestrial and marine sediments. Bulburrum Prospect geology contains Lower Cretaceous Mackandu Formation and Winton Formation siltstone, sandstone and mudstones, overlain by Tertiary and Quaternary unconsolidated rock and sediments. The target horizon is the Winton Formation which also hosts the Blackall Deposit.
The whole prospect is traversed by north east trending folds; the Noella Syncline, Ward River Anticline, Woolga Syncline and Ennishillen Anticline. This folding is very gentle with dips less than five degrees and axial plunges about the same or less so to the South West. Drilling undertaken by Thiess Bros in 1970 and BHP in 1982 intersected sub bituminous coal with individual seams of up to 5.5 metres thick.