Gold Hydrogen Hits Record Flow Index at Ramsay 3 With 20,000 bbl/day Potential
Key Takeaways
- Ramsay 3 has recorded a Productivity Index of ~40 bbl/day/psi during the wellbore clean-up phase — the highest PI ever measured at the Ramsay Project, exceeding the ~34 bbl/day/psi achieved at Ramsay 1 and 2.
- Flow rates have already exceeded 8,000 bbl/day with limited pressure drawdown, and the larger 7-inch wellbore and ESP system are designed to handle more than 20,000 bbl/day under optimised conditions.
- A preliminary drainage radius of ~1.25 km and negligible pressure depletion during initial shut-in build-up suggest substantial reservoir connectivity and a potentially large connected gas volume.
- The main Helium flow-testing program is expected to commence later this week, followed by testing of the Natural Hydrogen-bearing zone — two distinct near-term catalysts.
- All figures are preliminary and subject to confirmation; the company has explicitly flagged that Helium may not flow to surface and commercial viability has not been established.
Ramsay 3 delivers record Productivity Index and 20,000+ bbl/day flow potential
Gold Hydrogen (ASX: GHY) has released an interim update on flow testing at its Ramsay 3 well, with early results recording a Productivity Index (PI) of approximately 40 bbl/day/psi — the highest ever recorded at the Ramsay Project. Flow rates have already exceeded 8,000 bbl/day during the wellbore clean-up phase alone, with the potential for rates exceeding 20,000 bbl/day under optimised operating conditions.
These are preliminary results.
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Ramsay 3 highlights at a glance
The table below summarises the key interim results from the wellbore clean-up phase at Ramsay 3, Ramsay Project (PEL 687), Yorke Peninsula, South Australia.
| Metric | Result | Comparison / Context |
|---|---|---|
| Productivity Index (PI) | ~40 bbl/day/psi | Highest at Ramsay Project; vs ~34 bbl/day/psi at Ramsay 1 & 2; vs <2 bbl/day/psi for low-permeability reservoirs |
| ESP flow rate (clean-up phase) | >8,000 bbl/day | Achieved with limited pressure drawdown during wellbore clean-up phase only |
| Potential optimised flow rate | >20,000 bbl/day | Under optimised operating conditions |
| Perforated interval | 105m | Selected from 180m gross Helium-bearing Kulpara Dolomite using NMR log data |
| Estimated drainage radius | ~1.25 km | Preliminary estimate indicating potential for extensive reservoir connectivity |
What is a Productivity Index, and why does Ramsay 3’s result matter?
A Productivity Index measures how readily fluid flows from a reservoir into the wellbore for every unit of pressure drawdown applied. In plain terms, a higher PI means the reservoir gives up fluid more easily — less pressure force is needed to achieve the same, or greater, flow rate.
The ~40 bbl/day/psi PI recorded at Ramsay 3 is exceptionally strong. For context, low-permeability or “tight” reservoirs typically deliver PIs of less than 2 bbl/day/psi. Ramsay 3 is significantly above that benchmark.
The Ramsay 3 well also uses a larger 7-inch cased wellbore, compared to the 4½-inch casing used at Ramsay 1 and Ramsay 2. That larger diameter provides approximately 2.3 times the wellbore cross-sectional area, which in turn supports a substantially larger-capacity Electric Submersible Pump (ESP) — an ESP capable of handling up to or more than 20,000 bbl/day.
Another positive signal from early testing is the limited pressure drawdown observed while achieving flow rates above 8,000 bbl/day.
Strong reservoir signals support the Ramsay development case
Record PI confirms superior well design
The ~40 bbl/day/psi PI is the highest recorded across the Ramsay Project, exceeding the ~34 bbl/day/psi derived from Ramsay 1 and Ramsay 2. The result provides early confirmation that the larger 7-inch cased, cemented and perforated wellbore design at Ramsay 3 is performing as intended, and is capable of delivering substantially increased inflow capacity relative to the earlier wells.
The Gold Hydrogen strategic investment of $14.5 million from global energy majors provides the funding context behind the accelerated Ramsay 3 program, with the capital backing underpinning the larger wellbore design and enhanced ESP capacity deployed at this well.
Drainage radius points to substantial connected resource
Preliminary analysis indicates a drainage radius of approximately 1.25 km, demonstrating the potential for extensive reservoir connectivity and a substantial area of reservoir influence. Reinforcing this, initial shut-in pressure build-up data showed negligible pressure depletion — encouraging early evidence of substantial reservoir support and potentially a significantly larger connected gas volume.
105-metre perforated interval contributing strongly
The 105m perforated interval was selected from the 180m gross Kulpara Dolomite interval using NMR log data. Testing indicates this interval is making a strong contribution to aggregate well flow.
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What comes next: Helium flow program and Hydrogen testing
The Ramsay 3 program is progressing through a defined sequence. Based on the announcement, the near-term steps are:
- Extended wellbore clean-up phase is currently underway, recovering workover and completion fluids from the wellbore and near-wellbore region ahead of stabilised flow and representative gas sampling.
- Main Helium flow-testing program is expected to commence later this week, following mobilisation of additional equipment to assist with wellbore clean-up and optimisation.
- Natural Hydrogen-bearing zone testing will follow the completion of Helium zone testing.
It is important to note that all figures disclosed are preliminary field-derived measurements, subject to confirmation as the program progresses. The company has flagged that geological and development risks remain. Exploratory flow testing of the Kulpara Dolomite interval may not result in Helium flowing to surface, and there is no certainty that the Ramsay 3 testing program will achieve expected outcomes — including the booking of Contingent Resources, acceleration of front-end engineering and design (FEED), progression of a Ramsay development, or the establishment of commercial viability.
Gold Hydrogen has indicated it will provide further updates as the Ramsay 3 flow testing program continues.
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