Oil
Masirah Oil commences offshore Oman infill drilling
Masirah Oil Limited has initiated drilling operations at the Yumna field in Block 50, targeting a production start-up in November.
Key points
- Drilling has started on the first well of an offshore infill campaign in Block 50.
- First production from the new well is anticipated in November 2026.
- Arabian Drilling secured a contract in August to drill up to four wells for the project.
What happened
Masirah Oil Limited, an indirect subsidiary of Singapore-based Rex International, has started drilling the first well of a new infill campaign at the Yumna field. According to Offshore Energy reporting, the concession is situated in Block 50 off the coast of Oman within the Gulf of Masirah.
The operational milestone follows a contract awarded in August to Arabian Drilling by Masirah Oil and Northern Offshore. The agreement covers two firm wells alongside a pair of optional wells. Mike Hopkinson, General Manager of Masirah Oil, stated that production from the new well is expected to commence in November, as reported by Offshore Energy.
Block 50 spans an area of approximately 17,000 square kilometres. Commerciality for the Yumna field was declared in July 2020, with initial production achieved earlier that year in February. Subsequent development phases included the addition of the Yumna-2 and Yumna-3 wells in early 2021, followed by infrastructure upgrades such as a replacement floating storage tanker and a mobile offshore production unit.
Further multi-well programmes were executed through 2024, incorporating the Yumna-5 well and several workovers. The operating company continues to adjust production rates to optimize long-term recovery and build up oil reserves across the block.
Why it matters
Developments in Middle Eastern oilfields carry broader implications for global energy markets, particularly as producers seek to sustain output amidst fluctuating commodity prices. With Brent crude trading at 115.22 US dollars per barrel and WTI at 107.89 US dollars per barrel as of October 2026 according to US EIA figures, incremental offshore projects remain commercially attractive for independent operators focused on reserve replacement and asset optimization.
For resource-dependent economies like Oman, where fuel exports accounted for 72.4 percent of merchandise exports in 2025 according to World Bank data, continuous infill drilling helps mitigate natural field decline. African and international energy investors observe such brownfield campaigns closely, as they demonstrate how targeted capital expenditure and infrastructure upgrades can successfully extend the productive life of mature offshore assets without requiring entirely new standalone developments.
Original reporting
This article draws on the following reports. Read them in full on the publishers’ sites.
Context from CEII
Crude benchmarks move budgets, currencies and inflation in producer and importer countries alike. For economies such as Nigeria, where fuels dominate exports, production and refining decisions move the whole economy.
72.4% of Oman’s merchandise exports were fuels in 2025Countries in this story
Written by the CEII Desk, the Centre’s automated newsroom, from the reporting credited above and CEII’s own data. Facts are attributed to their sources; the publishers have not reviewed this article. Spotted an error? Tell our editors.
