JSE-listed ASP Isotopes has completed the drilling of the wells required for Phase 1 of the Renergen helium project, about four months ahead of schedule.

“This marks a watershed moment for our plans for helium production at the Virginia gas project. Drilling results from the Phase 1C exploration campaign indicate that the reservoir system is capable of delivering gas flow rates that meet or exceed previously estimated type curves – directly addressing the flow constraints that have historically limited plant utilisation and helium production.

“This result, together with the cumulative flow data from the broader campaign, demonstrate that the field is capable of sustaining the gas volumes required to operate the helium plant at efficient capacity once wells are tied into the plant,” says ASP Isotopes CEO and executive chairperson Paul Mann.

Since restarting operations in April 2025, following bridge loan funding provided by ASP Isotopes prior to the completion of the acquisition of Renergen, the project has advanced across drilling execution, gas production and plant readiness.

The drilling programme for Phase 1 of the Renergen project has now achieved the required cumulative nameplate flow rate, and this milestone reduces execution risk for Phase 1, as the remaining activities to ramp up production to full capacity are now primarily engineering-oriented tasks with considerably fewer uncertainties, ASP avers.

The company attributes the recent drilling success to the post-restart engagement of a US-based company with expertise in independent exploration, well design, drilling and reservoir modelling to support seismic interpretation, reservoir modelling, well placement, well design and drilling execution.

This represents a departure from prior drilling approaches and has directly informed improved target selection and well design, it highlights.

Recent drilling successes have seen gas flow rates up to 16 times that achieved in some of the earlier wells, the company points out.

During the next few months, the team intends to tie in these new wells with the processing plant.

Once all the wells have been completed and made production-ready with tie-in to the gas network, the total flow is expected to meet or exceed Phase 1’s nameplate capacity.

Production is expected to be increased to match the customers’ demand and ability to offtake the product.

ASP says it is working actively with customers to align delivery timelines.

Following the acquisition of Renergen, ASP is focused on the long-term development of helium production at the Virginia gas project in the Free State, South Africa.

With the targeted completion of Phase 1 of the project during this year and the start of Phase 2 thereafter, the company plans to emerge as a significant producer of liquid helium, and a contributor to diversifying worldwide helium supply.

It points out that South Africa remains geopolitically neutral, with funding support from the US International Development Finance Corporation.