• Two high quality, low impurity conventional gas discoveries made in the Erregulla
Deep-1 exploration well with an aggregate 28m of net gas pay at depths never
encountered in the Perth Basin. The discoveries include:
o 26m of net gas pay within the Kingia Sandstone with an average porosity of
13%, reservoir pressures of ~7,623 psia; and
o 2m of net gas pay within the High Cliff Sandstone with an average porosity of
11%, reservoir pressures of ~7,807 psia.
• Multiple gas samples have been acquired in both discoveries and have confirmed
good permeabilities, gas gradients and materially lower CO2 contents than
observed at West Erregulla.
• A further zone of over pressured high prospectivity was encountered from 4m of
net gas pay within the Irwin River Coal Measures with porosities up to 10% and
reservoir pressures of ~8,399 psia.
• The Erregulla Deep-1 well was drilled to 5,225m (MD) making it the deepest well
ever drilled onshore Australia.
• The Erregulla Deep-1 well extends the Permian gas play to the East where Strike
has a commanding 100% owned acreage position in EP503, 504 and 505.
Strike Energy Limited as operator of the EP469/L25 Joint Venture, which
includes the West Erregulla gas field, is pleased to announce multiple successful gas discoveries
in the Erregulla Deep-1 (ED-1) well in EP469.
The ED-1 well was drilled to a total depth of 5,225m MD or 4,944m TVDSS making it the deepest
well ever drilled onshore Australia.
The ED-1 well has made two high-quality, low impurity conventional gas discoveries. Both
discoveries are observed to be blocky zones of good quality gas charged sandstone reservoir.
Net gas pay and porosities have been interpreted from Mud Logs, Logging Whilst Drilling (LWD)
data and Wireline Logs. Pressures and gas samples across both formations were taken which
confirmed permeability and gas gradients. Gas samples secured from the discoveries were
analysed in the laboratory for their composition and makeup. Independent assurance was
undertaken in the compilation of this petrophysical assessment with the cutoffs used as those
for the West Erregulla wells and a range of salinity assumptions used to screen the results. These
initial results and outcomes will be further confirmed through flow testing, which is scheduled
to commence later this month.
Petrophysical evaluation was also conducted over a sand body within the Irwin River Coal
Measures. This zone had a strong mud gas response and was measured to be substantially overpressured. Unfortunately, due to bore hole breakout in this zone, a sample was unable to be
collected and cannot be categorised as a discovery at this time. This zone warrants additional
evaluation given the existing data collected.
Strike will now run the production liner and cement in place before completing the well for
production testing. The rig is expected to demobilise in the coming fortnight and Strike is
preparing to immediately follow with the mobilisation of a well test spread.
Implications of Erregulla Deep results for Strike and the extension of the Permian Gas Play
The Erregulla Deep-1 well is the most easterly
penetration of the Permian gas play. Strike has
a commanding acreage position across its
100% owned tenure on the eastern flank of the
play, which covers the Tathra Terrace in EP503,
504 and 505. The thickness and quality of the
ED-1 result at depths of ~5,000m also improves
the prospectivity of much of Strike’s acreage.
Earlier this year Strike acquired the 479 km
Kadathinni 2D seismic survey over the ArrinoKadathinni leads. Early versions of the seismic
show positive imaging at Permian level with
definition of the major fault systems that
support the structural extensions from the
Lockyer and Erregulla gas fields.
Strike’s Managing Director and Chief Executive Officer Stuart Nicholls said:
“The discoveries at Erregulla Deep are higher quality than Strike anticipated prior to drilling, with
reservoir quality, formation pressures and lower CO2 content all exceeding expectations relative
to the West Erregulla wells.
The Erregulla Deep-1 well is the most easterly and deepest penetration of the Kingia-High Cliff
Sandstones in the basin to date and is a significant play extender to the East and at depth for
Strike’s 100% acreage.
Erregulla Deep will be completed as a future producer and on a successful flow test may add to
the overall developable resource in EP469 / L25, which includes the West Erregulla gas field’s
independently estimated gross 452 PJ of 2P Reserves plus 2C Contingent Resources.”
About the Erregulla Deep-1 Exploration Campaign
The Erregulla Deep-1 well was drilled into an interpreted structural closure adjacent and due
East of the existing Reserves at the West Erregulla gas field and on trend with the Lockyer and
North Erregulla gas discoveries.
The ED-1 well is located at Lat: 29° 22' 19.91" S, Long: 115° 24' 17.66" E.
The EP469 JV is made up of:
• Strike Energy: 50% & Operator
• Warrego Energy 469 Pty Ltd: 50%
This announcement is authorised for release by the Managing Director and Chief Executive
Officer in accordance with the Company’s Continuous Disclosure Policy.
