Amplitude Energy Ltd. discovered gas in the Isabella prospect in Otway basin permit VIC/L24 offshore southeast Australia.
The well was drilled within Commonwealth waters, southwest of the producing Casino field, via a sidetrack (ST-1) from the earlier Elanora-1 well. The ST-1 8 ½-in. hole section penetrated the primary Waarre C reservoir target and safely reached the planned 1,788 m TVDSS.
Preliminary drilling and logging data recorded elevated gas readings in the Waarre C reservoir (intersected at 1,738 m TVDSS). These gas peaks coincide with elevated resistivity readings observed on logging while drilling (LWD) tools, consistent with probable hydrocarbon presence. The Waarre C sandstone exhibits a gross gas-bearing interval of about 10.7 m, including 8.2 m of interpreted high quality net pay, in line with other Waarre C in offset fields.
The penetrated Waarre C reservoir prohibits definitive assessment of the gas water contact depth without further data acquisition. Analysis of volume and pressure remains ongoing to determine the extent of the potential gas column below the lowest known gas in the well.
Amplitude Energy is operator in VIC/L24 (50%) with O.G. Energy holding the remaining 50% interest.
About the Author
Alex Procyk
Upstream Editor
Alex Procyk is Upstream Editor at Oil & Gas Journal. He has also served as a principal technical professional at Halliburton and as a completion engineer at ConocoPhillips. He holds a BS in chemistry (1987) from Kent State University and a PhD in chemistry (1992) from Carnegie Mellon University. He is a member of the Society of Petroleum Engineers (SPE).