Co-venturer Cooper Energy said oil fluorescence and cut was observed over the interval 2128-2133.5 metres.
"The oil shows were accompanied by minor oil in the drilling mud and elevated gas readings of 300 units on a background of 10 units," it said.
Last week, drilling was suspended at Cleansweep-1 due to mechanical failure of the rig.
With repairs completed, drilling of the well restarted on the well on Wednesday.
Cleansweep-1 is targeting 950,000 barrels of oil at the P50 level of confidence in the Paning, Birkhead-Hutton and Poolowanna Formations, with secondary potential in the Tinchoo Formation.
Once drilling is finished, interests in PEL 100 will be: Stuart (operator- 50%), Sundance Energy (23.333%), Cooper Energy Limited (19.167%), Enterprise Energy (5%) and Liberty Petroleum Corporation (2.5%).
