REG - Quantum Helium Ltd - 3D seismic confirms leadville helium structure

Quantum HeliumAnnouncement

09/02/2026 12:15

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RNS Number : 2777S  Quantum Helium Limited  09 February 2026

 

9 February 2026

 

Quantum Helium Limited

("Quantum" or the "Company")

 

 

Initial 3D Seismic Review Confirms Large Potential Leadville Helium Structure
At Sagebrush

Quantum Helium Limited (AIM: QHE) is pleased to provide an update on the
interpretation of the recently acquired high-resolution 3D seismic survey at
its Sagebrush Helium Project in Colorado.

Highlights

·      Initial processing of the Sagebrush high-resolution 3D seismic
survey completed

·      Historic Sagebrush-1 well confirmed as a dual oil and helium
well, with the Ismay Formation producing over 300,000 barrels of oil and a
deeper Drill Stem Test in the Leadville Formation flowing non-flammable gas
containing 2.76% helium

·      Initial interpretations suggest large potential helium-bearing
Leadville structure  consistent with historic well data and prior independent
evaluation

·      3D seismic confirms the structural interpretation previously
mapped from reprocessed 2D seismic

·      Early identification of new potential oil and helium targets at
Sagebrush and Coyote Wash

·      Results materially de-risk the planned extended production test
at Sagebrush-1

Sagebrush - 3D Seismic Update (See Figure 1)

Initial processing of the Sagebrush 3D seismic dataset has now been completed,
with interpretation work progressing across both helium and oil targets.

The Sagebrush-1 well, drilled in 1994, intersected the Leadville Formation and
recovered non-combustible gas during drill stem testing, with subsequent gas
analysis confirming a helium concentration of 2.76%. Initial interpretations
suggest this well data established the presence of a potential helium-bearing
accumulation within the Leadville Formation and forms the foundation of the
Company's helium strategy at Sagebrush.

In 2024, the Company reprocessed existing 2D seismic data across the Sagebrush
area, which allowed the Leadville structure hosting the Sagebrush-1 discovery
to be mapped and its size and geometry better defined. This work was
subsequently reviewed and confirmed by Sproule ERCE as part of the independent
Sagebrush resource evaluation.

The newly acquired 3D seismic survey has now confirmed the Leadville structure
previously mapped from the reprocessed 2D seismic, while providing
significantly improved resolution, continuity and structural confidence. This
confirmation of the existing interpretation was a core strategic objective of
the 3D seismic programme.

Overall seismic data quality is excellent. Once final depth conversion is
completed in the  coming weeks, detailed prospect mapping will commence
across the survey area.

A second key objective of the 3D seismic programme was to identify additional
oil prospectivity. At the Ismay Formation level, where the Company has
existing oil production, early interpretation has identified encouraging
seismic amplitude responses that conform closely with the original Sagebrush
Ismay oil discovery. Similar amplitude features are present nearby and may
represent previously undrilled algal mound features, which are now being
evaluated as potential new oil drilling targets through ongoing calibration
with existing well, log and core data.

Figure 1: Preliminary Sagebrush Area Amplitudes at Ismay Level

Coyote Wash - Early Observations (See Figure 2)

Within the Company's southern Coyote Wash acreage, preliminary seismic
interpretation continues to support the view that the historic Mariano Wash
1-1 well was drilled near the edge of a larger structural feature. Seismic
amplitudes indicate that the crest of the structure - typically the most
prospective part of the trap - may not have been tested. These observations
are based on early-stage interpretation and remain subject to further detailed
analysis, calibration and integration with additional subsurface data. While
this work is ongoing, the current dataset supports the potential for
materially improved results from a future well drilled on the interpreted
structural high.

Coyote Wash is at a more advanced stage of interpretation overall, with the
Company having previously disclosed six drill-ready Leadville helium
prospects, together with additional Ismay oil targets, all of which will be
further refined as interpretation and confirmatory work progresses.

 

 

 

 

Figure 2: Mariano Wash Amplitude on New 3D and Prior to New 3D

Howard McLaughlin, Chief Executive of Quantum Helium, commented: "The
Sagebrush-1 well established the presence of helium in the Leadville Formation
more than three decades ago, with drill stem testing recovering
non-combustible gas and subsequent analysis confirming a helium concentration
of 2.76%. That well data, combined with reprocessed 2D seismic and independent
validation by Sproule ERCE, gave us a strong technical foundation.

One of the primary objectives of the 3D seismic programme was to confirm that
interpretation, and the new data has done exactly that - clearly validating
the size, geometry and continuity of the Leadville structure we had previously
mapped. The quality of the data is excellent and materially strengthens our
confidence as we move towards testing the Leadville in Sagebrush-1.

The second objective of the survey was to identify new oil prospectivity, and
we are encouraged by early indications at the Ismay level, where seismic
amplitudes mirror the original Sagebrush oil discovery and suggest the
presence of additional undrilled algal mound features. Together, these
preliminary results significantly de-risk the next phase of activity and
reinforce the broader development and growth potential across both Sagebrush
and Coyote Wash.

Market Abuse Regulation (MAR) Disclosure

The information contained within this announcement is deemed by the Company to
constitute inside information as stipulated under the Market Abuse Regulations
(EU) No. 596/2014 ('MAR') which has been incorporated into UK law by the
European Union (Withdrawal) Act 2018. Upon publication via Regulatory
Information Service ('RIS'), this information is now in the public domain

 

Enquiries:

 Quantum Helium Limited     NOMAD and Joint Broker

 Carl Dumbrell              SP Angel Corporate Finance LLP

 Chairman                   Stuart Gledhill / Richard Hail / Adam Cowl

                            +44 (0) 20 3470 0470
 Brand Communications       Joint Broker

 Alan Green                 CMC Markets UK Plc

 Tel: +44 (0) 7976 431608   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.

 

 

 

 

 

 

 

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