HyTerra Reports 96.1% Hydrogen from Sue Duroche 3, Confirms Historic Potential in Kansas
HyTerra Limited (ASX: HYT) has confirmed hydrogen concentrations of up to 96.1% from its Sue Duroche 3 well, marking one of the highest purity results ever recorded in a hydrogen exploration program. These results, independently verified by Isotech Laboratories, validate historic 92% hydrogen readings from the nearby Sue Duroche 2 well (2009).
Sue Duroche 3 was drilled to a total depth of 3,453 ft (1,052 m) through sedimentary layers and Precambrian basement rock. Extensive formation evaluation conducted by Schlumberger included mud gas logging, wireline logging, and rotary side-wall coring. Additional mud gas samples are currently being sent for further analysis.
The results also revealed elevated helium levels in deeper sections, with future lab results expected to quantify concentrations. Wireline interpretations suggest promising reservoir features including porosity, dolomitization, and fracturing.
The well will now be suspended pending a planned re-entry for downhole gas sampling and extended testing to assess productivity and commercial potential. Meanwhile, the Murfin 116 rig is mobilizing to drill Blythe 13-20, the second well in HyTerra’s fully funded 12-month campaign backed by Fortescue.
Full press release is attached below:
ASX RELEASE – 6 May 2025
SIGNIFICANT HYDROGEN CONCENTRATIONS FOUND IN SUE DUROCHE 3
- Independent laboratory analysis has verified hydrogen concentrations of up to 96.1% (air-corrected) from Sue Duroche 3 mud gas samples
- Validates historical 92% hydrogen observed at nearby Sue Duroche 2 in 2009
- Mud gas logs showed high hydrogen intervals and elevated helium while drilling into Pre-Cambrian basement
- Total depth of 3,453 ft (1,052 m) achieved on time, on budget, and with no HSE incidents
- Re-entry planned for downhole gas sampling
- Murfin Rig 116 now mobilising to Blythe 13-20
HyTerra Ltd (ASX: HYT) has completed its Sue Duroche 3 well in the Nemaha Project, located in the US state of Kansas.
Preliminary results indicate the presence of high-purity hydrogen, validating historical results and indicating that hydrogen is actively migrating from the Pre-Cambrian basement.
The well was drilled to a total depth of 3,453 ft (1,052 m), encountering ~1,100 ft of sedimentary cover and ~2,350 ft of Pre-Cambrian basement.
The well was drilled with surface casing set at 506 ft. Drilling and formation evaluation were completed safely, on time and on budget with no HSE incidents.
Mud gas logging was conducted by Schlumberger during drilling and collected gas samples were analysed by Isotech Laboratories.
Analysis results indicate that the mud gas contains hydrogen concentrations up to 96.1% (air-corrected). This validates the 92% hydrogen previously reported at the nearby Sue Duroche 2 well, drilled in 2009.
A second set of mud gas samples and helium concentration results are pending.
Wireline logs and rotary side-wall cores were acquired over the basement section and are currently being analysed.
Preliminary wireline interpretations identified potential reservoir intervals with matrix porosity, dolomitisation and fracturing. These characteristics are conducive to hydrogen accumulation.
The well has now been suspended in preparation for a future re-entry and downhole gas sampling. This will provide additional insights into hydrogen concentrations at depth, flow rates and the commercial potential of the reservoir.
The Murfin Rig 116 is now mobilising to drill the Blythe 13-20 well.
Benjamin Mee, HyTerra’s Executive Director, said:
“To achieve some of the highest hydrogen concentrations ever seen in our first well is a great start.
We now look forward to receiving the remaining laboratory results, re-entering the well to evaluate the reservoir, and continuing this exciting exploration program.”
Authorised by:
Benjamin Mee
Executive Director
