Re-entry drilling at the Chinarevskoye Field

Nostrum Oil & Gas PLC (LSE: NOG) ("Nostrum", or the "Company" and together with its subsidiaries, the "Group"), an independent oil and gas company engaging in the production, development and exploration of oil and gas in the pre-Caspian Basin, announces that it has commenced well No.301 re-entry drilling, the first of a two well re-entry drilling programme at its Chinarevskoye field, to be executed over 2023-2024. This is in line with the licence commitments and field development plan of the Company's subsidiary Zhaikmunai LLP. The programme will leverage existing wellbores to reduce costs and carries a level of uncertainties and risks as the planned subsurface targets contain multiple exploration, appraisal, and development objectives.

The well No.301 drilling and completion duration is estimated at 90 days with start-up expected mid-2024. After drilling well No.301 the rig will move to well No.41 for a sidetrack, with a 90 day drilling and completion duration and if successful, the well will be completed and brought on line in Q3 2024.