Amplitude Energy has provided an 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 ('ST-1') from the earlier Elanora-1 well.
The ST-1 8 ½-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.
Source: Amplitude Energy
