In November 2018 NIS reported that appraisal well Cestereg 1X situated in the Srednji Banat licence was successfully completed during Q3 2018. The drilling operations were concluded in June 2018 and the well was put on testing. The Cestereg discovery is situated about 1 km east of the Banatski Dvor gas field and 12 km north-northeast of the city of Zrenjanin.  NIS drilled the Cestereg 2 gas discovery to a total depth of 1,350 m in October 1998. The objective was in Pontian sandstones. A 27-sq km 3D seismic survey was conducted over the area between October and December 1998 to define the extent of the discovery. On 18 June 1998 NIS spudded the Cestereg 4 appraisal well which was abandoned as a dry hole at some 1,000 m on 7 July 2000. The planned total depth was 1,387 m. Sidetrack Cestereg 4/1 was kicked off from Cestereg 4 on 10 July 2000 and it was also abandoned as a dry hole on 25 July 2000 at a total depth of 1,436 m. Between May and July 2000 NIS drilled the Cestereg 3 appraisal well to a total depth of 1,363 m. The well was completed with gas.  Interest in the licence is held solely by NIS which is majority owned by Gazprom Neft (56.15%), the oil arm of Russiaâs state-owned natural gas monopoly Gazprom.
Serbia (Banat Sub-basin (Pannonian B.)) Cestereg 2