Amplitude Energy Limited provides the following update
on drilling operations at the Isabella prospect in the Offshore Otway Basin, Victoria.
The Isabella field is located in permit VIC/L24 within Commonwealth waters, south-west of the producing
Casino field. Amplitude Energy is operator and 50% interest holder in VIC/L24 with O.G. Energy holding the
remaining 50% interest. The Isabella field is being drilled via a sidetrack (锟絊T-1锟�) from the earlier Elanora-1
well.
The ST-1 8 锟�-inch hole section penetrated the primary Waarre C reservoir target and safely reached the
planned Total Depth (TD) of 1,788 metres TVDSS1 at 04:30 AEST on 1 March 2026.
Preliminary drilling and logging data recorded elevated gas readings in the Waarre C reservoir (intersected
at 1,738 metres 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 approximately 10.7 metres, including 8.2
metres of interpreted high quality net pay, in line with other Waarre C in offset fields. Other technical
information required by ASX Listing Rule 5.30 is provided in the Appendix to this announcement.
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.
Forward plan
Wireline logging operations to collect pressure and sample data required to inform resource volume
estimates and to determine gas composition is to be conducted in coming days. A decision on whether ST-1
will be completed with a sub-sea tree will then be made. Should the well be completed, a flow test will be
conducted and the well suspended, ready for development as part of the ECSP.