Key Highlights

  • H3 Energy completed a major seismic reprocessing stage at the Warro gas project.
  • Updated imaging aims to improve drilling target selection across the reservoir.
  • Final depth migration work remains on schedule for completion by September 2026.
  • The company continues progressing discussions with potential farm-in partners.

H3 Energy Limited (ASX: H3E) has advanced development of its flagship Warro gas project after completing the pre-stack time migration (PSTM) phase of reprocessing legacy three-dimensional seismic data. The latest milestone is intended to improve understanding of the reservoir, refine future drilling targets and support ongoing discussions with potential farm-in partners as the company progresses one of the largest discovered onshore gas resources in Western Australia's Perth Basin.

Warro Remains the Company's Flagship Asset

H3 Energy is an Australian energy exploration company focused on conventional gas, natural hydrogen, helium and geothermal opportunities.

Formerly known as Whitebark Energy, the company adopted the H3 Energy name in December 2025 as part of a broader strategic repositioning. Its portfolio is centred on the Warro gas project in Western Australia's northern Perth Basin and the Alinya project in South Australia's Officer Basin.

Warro remains the company's primary development asset. Located within the R7 exploration licence, the project lies approximately 30 kilometres from the Dampier to Bunbury Natural Gas Pipeline, providing proximity to existing energy infrastructure.

The field contains four previously drilled and suspended wells targeting the Yarragadee tight-gas sandstone, while deeper conventional targets remain within the Cattamarra Coal Measures.

Seismic Upgrade Improves Reservoir Definition

The company recently completed the PSTM stage of reprocessing seismic data originally acquired in 2011.

According to H3 Energy, the updated imaging provides significantly improved subsurface detail compared with the original dataset. The work is being undertaken by Velseis Processing Pty Ltd and remains ahead of schedule.

The final phase, pre-stack depth migration (PSDM), has commenced and is expected to conclude by the end of September 2026.

Management expects the higher-quality imaging to improve identification of high-porosity zones within the Yarragadee reservoir that could become future horizontal drilling targets. The updated interpretation is also expected to assist evaluation of the deeper Cattamarra Coal Measures.

Importantly, the reprocessed data is already being shared with third parties evaluating potential farm-in opportunities.

Large Resource Requires Further Appraisal

H3 Energy estimates Warro contains a mid-case gas-in-place resource of approximately 3.2 trillion cubic feet.

Broader estimates published by the company include contingent gas-in-place ranging between approximately 2.4 trillion and 4.3 trillion cubic feet, together with prospective gas-in-place estimates extending as high as 7.3 trillion cubic feet.

However, these figures represent gas in place rather than commercially recoverable reserves.

Previous drilling confirmed the presence of gas but commercial flow rates have remained the principal technical challenge.

The current seismic program is designed to improve drilling precision by identifying reservoir "sweet spots" that may respond more effectively to modern horizontal drilling and completion techniques.

Funding Strategy Focuses on Farm-In Partners

As a micro-cap explorer, H3 Energy continues to rely on external funding to progress project development.

During April 2026, the company completed a placement raising approximately AUD3.5 million to support activities across both Warro and Alinya.

Management has consistently indicated that securing a farm-in partner represents the preferred pathway to funding future appraisal drilling, reducing capital requirements while advancing project evaluation.

The upgraded seismic dataset forms an important part of that process by providing prospective partners with higher-quality technical information.

What Investors May Watch Next

Investors are likely to monitor completion of the PSDM seismic program, interpretation of the updated dataset, progress towards securing a farm-in partner, future drilling plans and developments at the Alinya project.

Any announcement relating to appraisal drilling or commercial partnerships may also remain important.

Risks

H3 Energy remains exposed to exploration, funding and execution risks.

The Warro resource has not yet been converted into commercial reserves, while future development depends on successful appraisal drilling, partner funding and favourable technical outcomes.

Additional capital may also be required as exploration activities continue.