Mosman Oil and Gas Limited (AIM: MSMN) has appointed independent consultancy Sproule ERCE to prepare a Competent Person’s Report (CPR) for its 100%-owned Coyote Wash Project in Colorado, USA.
The report will provide independent verification of Mosman’s internal best estimate of 1,072 million cubic feet (MMcf) of 2U gross prospective helium resources identified across six mapped prospects.
The assessment will also evaluate potential CO₂ and hydrocarbon resources across eight mapped structures, with final results expected in late November 2025.
This follows Sproule’s verification of Mosman’s Sagebrush Project in September 2025, marking the company’s second independently verified helium resource in Colorado. Mosman said the latest review will further strengthen confidence in its regional helium portfolio as it advances plans for future drilling and development.
Howard McLaughlin, Chief Executive Officer of Mosman, commented: “We’re very pleased to again be working with Sproule, this time to verify our internal helium resource estimate at Coyote Wash. This review will mark Mosman’s second independently verified helium resource, following Sproule’s certification of Sagebrush earlier this year – a major milestone that reinforces the credibility and depth of our Colorado portfolio. Coyote Wash already represents over one billion cubic feet of best-estimate helium resources across six defined prospects. Independent verification will provide additional confidence in those figures and allow us to advance detailed planning for drilling and development. With two verified helium projects, one drilled and cased well ready for testing, and 3D seismic expected to commence this quarter, Mosman is now in a strong, strategic position – ahead of many peers in terms of resource definition and proximity to potential production. We’re building a substantial helium business with clear momentum and tangible value catalysts ahead.”
Updates on the Company’s activities are regularly posted on its website: www.mosmanoilandgas.com
Notes to editors
Mosman (AIM: MSMN) is a helium, hydrogen and hydrocarbon exploration, development, and production company with projects in the US and Australia. Mosman’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.
