Highlights
锟� Charlemont-1 makes previously unanticipated gas discovery within thin Waarre C
sandstones following the successful recovery of a gas sample.
锟� Preliminary petrophysical evaluation of wireline data is ongoing over the Waarre A, where
elevated gas readings and log resistivity are consistent with probable gas presence.
锟� The Waarre C gas sample has a CO2 concentration of 16 Mol%, based on preliminary rigbased compositional analysis1
, similar to the La Bella gas field.
锟� Charlemont-1 confirms gas charge at both ends of the Charlemont Trend, de-risking
intervening prospects that exhibit consistent seismic amplitude anomalies.
锟� Charlemont-1 is the second gas discovery of the Otway Exploration Drilling Program (OEDP),
highlighting the prospectivity of the Charlemont prospect cluster.
锟� Wireline logging is complete and Charlemont-1 will be plugged and abandoned, concluding
a successful Phase 1 of the OEDP.
3D Energi Limited is pleased to announce a gas discovery at the Charlemont-1
exploration well within VIC/P79 exploration permit, offshore Otway Basin, Victoria (Figure 1), where it holds
a 20% participating interest.
The wireline logging program has been completed across the Waarre C, B and A sandstones to fully evaluate
the nature and extent of any hydrocarbons in these units.
Gas Discovery Confirmed in the Waarre C
MDT operations successfully recovered a representative gas sample from a Waarre C sandstone at 2571.2m
MDRT, confirming the presence of hydrocarbons. This direct confirmation is consistent with:
锟� Preliminary petrophysical interpretation from wireline logs, indicating several thin hydrocarbonbearing sandstones coincident with intervals of elevated resistivity.
锟� Drilling observations, including elevated gas readings.
Preliminary rig-based compositional analysis of the sample reveals a CO2 concentration of 16 Mol%
3
. This is
within the range of pre-drill predictions based on results from the Waarre C at the La Bella gas field (12-13
Mol%), approximately 7km to the east.
The intersection of gas in the Waarre C was not anticipated prior to drilling and may have positive implications
for the unit across the Charlemont Trend, where Charlemont C and E demonstrate seismic amplitude support.
Probable Hydrocarbon Presence in the Waarre A
The primary Waarre A target was intersected over a 70 m gross interval at 2,683 m MDRT2,3
. Elevated gas
readings in the Waarre A sandstone coincide with elevated resistivity on the LWD tool and is consistent with
probable hydrocarbon presence in Waarre A sandstones. Petrophysical analysis is required to confirm the
nature and extent of hydrocarbons and preliminary evaluation is ongoing, integrating all available datasets.
The interpretation of MDT pressure data is inconclusive due to limited valid pressure tests, difficulties
interpreting fluid gradients, and potential pressure breaks between pressure points. On this basis, a valid gas
gradient cannot be determined within the Waarre A. Despite this, MDT pressure data indicate that the
Waarre C, B and A units do not comprise a single, continuous gas column.
No fluid samples were recovered from the Waarre A and the Ora wireline formation test will not be run.
Gas Discovery Validates Charlemont Trend
Charlemont-1 has appraised the penultimate prospect at the down-dip extent of the Charlemont Trend, a
prospect chain that extends up-dip to the La Bella gas discovery (Figures 2-4).
Together, these results demonstrate gas charge at both ends of the Charlemont Trend, with intervening
prospects exhibiting consistent geophysical characteristics, including comparable amplitude anomalies. This
continuity of geophysical response supports the interpretation of a gas-charged system along the
Charlemont Trend.
Otway Exploration Drilling Program Success
Charlemont-1 represents the second gas discovery under the Otway Exploration Drilling Program, following
the recent Essington discovery, reinforcing the prospectivity of the Charlemont Cluster and the effectiveness
of an infrastructure-led exploration strategy in the Otway Basin.
Commenting on Phase 1 of the Otway Exploration Drilling Program, Executive Chairman Noel Newell said:
锟絇hase 1 of the Otway Exploration Drilling Program has identified important new natural gas resources
close to existing offshore gas production and processing infrastructure in the Otway Basin, supplying the
Australian domestic gas market. This enhances the strategic significance of the discovery and supports
future development optionality, subject to further technical and commercial evaluation, consistent with
the Company锟絪 objective of contributing new gas supply to a tightening East Coast market锟�.
Further analysis and evaluation are required to determine the commercial viability of the Phase 1 gas
discoveries, and no decisions have been made regarding progression to development.
Charlemont-1 will now be plugged and abandoned in accordance with the approved drilling Environment
Plan. Operations at Charlemont-1 will likely be completed this weekend (weather and operational conditions
permitting), at which stage the Transocean Equinox rig is being transferred for use by another operator in
the region.
There is potential to drill additional wells as Phase 2 of the Otway Exploration Drilling Program under the
approved Environment Plan; however, no decision has been made at this stage and further evaluation will
be required before confirming any next steps.
This announcement is authorised for release by the Board of Directors of 3D Energi Limited.
Equity interest
3D Energi Limited 20%
ConocoPhillips Australia (Operator) 51%
Korea National Oil Company 29%