Prospex Energy, the AIM quoted investing company focused on European gas and power projects, is very pleased to confirm that gas production from the Viura‑1B well in the Viura gas field in northern Spain has reached the planned plateau rate of 180,000 normal cubic metres per day. The operator of the Viura field, HEYCO Energía Iberia S.L. ("HEI" or the "Operator") brought the well back into production on Friday 17 October 2025.  

The reported flow rate of gas on 22 October 2025 from the Viura-1B well was 186,333 normal cubic metres, which is equivalent to 196,490 standard cubic metres or 6.9 million standard cubic feet. This rate was achieved at a 30% choke setting.  This will be the ongoing plateau production rate. The water cut continues to be low and is reducing. 

Prospex owns 7.24% of the Viura field through its ownership of 7.5% of HEI.  Prospex is accruing 14.47% of the production income from the Viura gas field until payback of its initial capital investment (expected to be ≈£8 million) plus the accrued 10% p.a. interest thereon.

Mark Routh, Prospex's CEO, commented:
"I am very pleased to confirm that the flow rate of natural gas from the Viura-1B well in the Viura field has achieved the planned plateau production rate within a week of the recommencement of production last Friday. The confirmation of the performance of this reservoir is especially pleasing after the recent frustrating one-off event which delayed the resumption of production after the successful workover in July.

"This confirms our view that Viura is a prolific gas field and was an excellent addition to our portfolio and that it is likely to continue production and cash flows long into the future."

KeyFacts Energy: Prospex Energy Spain country profile