On 16 March 2020, Petroneft Resources Plc announced the successful test of an appraisal well in the Cheremshanskoye discovery in Tomsk Oblast (Western Siberia). Cheremshanskaya 4 drilled on the northern flank of the discovery was re-entered on 17 February. Two intervals in the Vasyugan Formation Unit Yu1 (Callovian-Oxfordian) identified as oil saturated by logging were perforated. The intervals 2,630.8-2,633.8 m and 2,644-2,655 m tested oil without water at a rate of 476 b/d through a 10 mm choke. After completion of the test, the company moved a workover rig to the discovery well Cheremshanskaya 3 located in the southern part of the field with the aim to test reservoir Yu14 (Lower Jurassic).  Cheremshanskoye, discovered in 2011, is located in the Kaymys-Vasyugan Province. Recoverable oil reserves of two pools are estimated at 4 MMbbl of 2P and 18 MMbbl of 3P. The license is operated by Lineynoye where Petroneft owns 50% with the operatorship.
Russia (Kaymys - Vasyugan Province (West Siberian B.)) Cheremshanskoye (Tomsk)