Lundin confirmed on 22 January 2018 that it has re-assessed the reserves for Alta and Gohta following the drilling which took place on the discoveries in 2016 and 2017. As a result it has downgraded its estimates for both fields to a combined 115-390 MMboe. At the time of discovery, reserves for Alta were estimated at 125-400 MMboe and for Gohta were 91-184 MMboe.  Two appraisal wells, each with a sidetrack, were drilled at Alta in 2015, all confirming communication with the discovery well. The sidetrack of the second appraisal well, 7220/11-3 A, was re-entered in 2016 and was deepened and tested at a rate of 21 MMcfg/d through a 64/64â choke. In 2017 Lundin spudded a further appraisal well - 7220/11-4 - which encountered a 4 m gas column and a 44 m oil column in Permo-Triassic clastic carbonates. Good communication with the previous Alta wells was confirmed from pressure data, with the same fluid contacts and gradients. The well was tested and flowed at a constrained rate of 6,050 bo/d through a 56/64â choke, indicating very good reservoir quality and lateral continuity through the reservoir. Sidetrack 7220/11-4 A found a 10 m gas column and a 44 m oil column in the Permo-Triassic Orn Formation with the same hydrocarbon contacts. The sidetrack was intended to help as a calibration point for a horizontal well and EWT in 2018 A Gohta appraisal well was drilled in 2017. 7120/1-5 had a planned duration of 75 days with an option to sidetrack and, depending on the results, perform up to two well tests. However, after drilling to a shallower-than-planned TD of 2,527 m (the plan was 2,952 m) in the Permian Roye Formation Lundin abandoned the well as a dry hole. A 300 m gross section of Permian carbonates was present in the well but reservoir quality was poor and there were only weak shows. 7120/1-5 was drilled to define the northeasterly extent of the field and provide a calibration point for a potential future horizontal well and extended well test Alta is covered by PL 609 where interest is divided between Lundin Norway AS (40% + operator), DEA Norge AS (30%) and Idemitsu Petroleum Norge (30%). Gohta lies within PL 492 which is operated by Lundin Norway AS with a 40% interest. Lundin is partnered by Aker BP ASA (60%).
Lundin (40%op. AkerBP 60%) confirmed that it has re-assessed the reserves for Alta and Gohta following the drilling which took place on the discoveries in 2016 and 2017. As a result it has downgraded its estimates for both fields to a combined 115-390 MMboe. At the time of discovery, reserves for Alta were estimated at 125-400 MMboe and for Gohta were 91-184 MMboe.