Key highlights

• Noble Helium has begun moving its drilling rig and equipment to the Kinambo-1 site at the North Rukwa Helium Project in Tanzania.

• Drilling is expected to start in November, with the mobilisation announced to the ASX on 3 November.

• This update explains the pause in the rig move, the SLB tools and the weather and timing considerations.

Noble Helium (ASX:NHE) has begun moving its drilling rig and equipment to the Kinambo-1 site at the North Rukwa Helium Project in Tanzania, with drilling expected to start in November. The company announced the mobilisation to the ASX on 3 November.

Contractor BoreXpert is transporting a Schramm T130XD rig about 1,500 kilometres from Kenya. Several trucks had already crossed into Tanzania at the time of the update, with the rest expected to clear the border over the following days. Noble said all permits required for exit and entry were in place.

A smaller footprint than 2023

The equipment is travelling on 13 ruggedised trucks and trailers, compared with the 40 truckloads needed for the company's Mbelele drilling campaign in 2023. Noble attributed this to a more compact rig package. A lighter mobilisation can reduce logistics costs and complexity, although the company has not disclosed a cost comparison.

The reason for the pause

Noble first began mobilising in September but deliberately paused until it received confirmation that SLB had completed prior commitments and that its wireline logging and downhole sampling equipment had been serviced and was available.

Executive chairman Dennis Donald said the company chose to wait rather than incur the "substantially higher costs" of on-site day rates and crew costs while the testing spread was unavailable. The decision traded a short delay for lower standby costs, a common judgement in remote drilling campaigns where idle rigs can consume budgets quickly.

Why the SLB tools matter

According to Noble, SLB is the only Well Logging and data collection provider in central East Africa with the tools required to generate the downhole technical data needed for future independent reserves certification. Donald described the SLB testing spread as "absolutely critical" to the campaign.

The data are intended to support a planned independent resource assessment of the western Margin prospects and to improve the company's understanding of potentially larger targets along the eastern margin of the North Rukwa Basin. Those eastern targets remain untested, and the company's description of them as potentially larger is an interpretation rather than a measured result.

Weather and timing

Noble does not currently expect weather to materially affect delivery, rig-up or drilling, citing the ruggedised equipment and favourable forecasts. That assessment could change, and remote East African logistics carry risks, including customs delays and road conditions.

Why helium exploration is different

Helium projects are judged on gas concentration, flow and the size of the trapped accumulation, much as conventional gas projects are. Without reliable downhole logs and samples, it is difficult to estimate contingent or prospective resources to an independent standard. That is why Noble has placed so much weight on securing the right data-collection tools before drilling begins, rather than simply drilling as early as possible. A well with incomplete data can leave a company with results it cannot independently certify, which may limit its ability to attract funding partners or offtake interest later. Helium also differs from Natural Gas in that buyers are often specialised industrial users, so the route to market for any Tanzanian discovery would need very careful planning well before production.

Context for investors

Noble Helium's strategy is to define a potentially large-scale helium resource within Tanzania's East African Rift System. Helium is used in medical imaging, semiconductor Manufacturing and other specialist applications, and Supply has periodically tightened. However, Noble has not yet reported certified reserves at North Rukwa, and exploration wells can Fail to find commercial gas.

Next steps

Near-term milestones include completing customs clearance, moving the remaining equipment to site and finishing rig-up before drilling. Noble said it would provide further updates in the coming weeks.