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15 Dec 2025 08:21
15 December 2025
Quantum Helium Limited
("Quantum" or the "Company")
Quantum Updates Resources at Sagebrush Following Increase to Working Interest
Quantum Helium Limited (AIM: QHE), advancing helium, hydrogen and hydrocarbon projects in the USA, provides updated net resource figures for the Sagebrush Helium Project in Colorado following the increase in its working interest from 82.5% to 90%, as announced on 11 December 2025.
The underlying gross volumes remain unchanged from the Sproule ERCE independent evaluation announced on 18 September 2025 under SPE PRMS Standard (*), with Quantum's higher working interest now reflected in the revised net figures.
Updated Net Prospective Resources - Sagebrush
(Net After 16.67% Royalty, Net to Quantum at 90% WI)Source of gross resource data: Sproule Sagebrush Resource Evaluation Report (18 September 2025).
Helium (MMscf)
Estimate | Gross Helium | Net After Royalty | Net to Quantum (90% WI) |
1U | 80 | 67 | 60 |
2U | 134 | 112 | 101 |
3U | 269 | 224 | 202 |
Hydrocarbon Gas (MMscf)
Estimate | Gross Hydrocarbon Gas | Net After Royalty | Net to Quantum (90% WI) |
1U | 661 | 551 | 496 |
2U | 1,101 | 917 | 825 |
3U | 2,218 | 1,848 | 1,663 |
CO₂ (MMscf)
Estimate | Gross CO₂ | Net After Royalty | Net to Quantum (90% WI) |
1U | 1,161 | 968 | 871 |
2U | 1,964 | 1,637 | 1,473 |
3U | 3,899 | 3,249 | 2,924 |
Total Raw Gas (MMscf)
Estimate | Gross Total Gas | Net After Royalty | Net to Quantum (90% WI) |
1U | 2,906 | 2,422 | 2,180 |
2U | 4,842 | 4,034 | 3,631 |
3U | 9,760 | 8,133 | 7,320 |
Sagebrush Seismic Acquisition Update
The high-resolution 3D seismic programme at Sagebrush continues to progress very well. Field crews have maintained strong productivity throughout the past week, with data recording and receiver retrieval proceeding smoothly, and overall acquisition now well advanced.
Based on current progress, the Company expects the seismic survey to be substantially completed by the middle of this week, after which the dataset will move into processing. Initial processed outputs remain on track for delivery in January.
Qualified Person Statement
The information contained in this announcement has been reviewed and approved by Jeff Aldrich, Principal Geoscientist P.G., L.P.G, Sproule ERCE. Certified Petroleum Geologist (CPG), American Association of Petroleum Geologists (AAPG)
Note: (*) Resources have been estimated by Sproule ERCE using the reserve and resource estimation guidelines outlined by the Petroleum Resources Management System (PRMS), as revised June 2018. Helium and Carbon Dioxide gas has been evaluated as a non-hydrocarbon gases using the principles of the SPE PRMS as allowed by the SPE August 2022 statement on the "Extension of PRMS Principles to Non-Hydrocarbon/Non-Traditional Situations".
Enquiries:
Quantum Helium Limited Carl Dumbrell Chairman
| NOMAD and Joint Broker SP Angel Corporate Finance LLP Stuart Gledhill / Richard Hail / Adam Cowl +44 (0) 20 3470 0470 |
Brand Communications Alan Green Tel: +44 (0) 7976 431608 | Joint Broker CMC Markets UK Plc Douglas Crippen +44 (0) 020 3003 8632 |
Updates on the Company's activities are regularly posted on its website: www.quantum-helium.com
Notes to editors
Quantum (AIM: QHE) is a helium, hydrogen and hydrocarbon exploration, development, and production company with projects in the US and Australia. Quantum's strategic objectives remain consistent: to identify opportunities which will provide operating cash flow and have development upside, in conjunction with progressing exploration. The Company has several projects in the US, in addition to royalty interests in Australia.
Glossary
Term | Definition |
1U / Low Estimate | At least a 90% probability that the quantities recovered will equal or exceed this estimate. |
2U / Best Estimate | At least a 50% probability that the quantities recovered will equal or exceed this estimate. Often considered the "most likely" case. |
3U / High Estimate | At least a 10% probability that the quantities recovered will equal or exceed this estimate. Represents upside potential. |
Contingent Resource | Those quantities of petroleum estimated, as of a given date, to be potentially recoverable from known accumulations by application of development projects, but which are not currently considered to be commercially recoverable owing to one or more contingencies. |
MMscf | Million standard cubic feet of gas, measured at standard conditions of temperature and pressure. |
Mscf | Thousand standard cubic feet of gas, measured at standard conditions of temperature and pressure. |
Prospective Resource | Those quantities of petroleum estimated, as of a given date, to be potentially recoverable from undiscovered accumulations by application of future development projects. |
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