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Only the month is given, per Aramco's[2][3] 26 February 2026 release: Tanajib 'Operations commenced in December 2025' and 'coincided with the start of production at Aramco's Marjan crude oil increment' (OGJ: 'Formally commissioned in December 2025') - a month, so its last day.
Aramco's[3] FY2025 results (10 March 2026): 'Marjan crude oil increment brought onstream and water injection operations commenced at Berri crude oil increment', with operations begun at Tanajib Gas Plant.
Aramco's[2] own release, 26 February 2026: Tanajib 'Operations commenced in December 2025', 2.6 bscfd raw gas capacity in 2026, processes associated gas from Marjan and Zuluf, start coincided with the Marjan crude increment.
World Oil, 26 February 2026: Tanajib commenced operations in December 2025, 2.6 Bscfd in 2026, processes Marjan and Zuluf associated gas, coincided with the Marjan increment start-up.
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