Russian state oil giant Rosneft said the company has completed the drilling of the first super deep exploration and appraisal well, Maria-1, on the Zapadno-Chernomorskaya license area offshore the Black Sea.

According to Rosneft, the water depth at the drilling site reaches 2,109 meters, with the actual well depth at 5,265 meters. The drilling of the well led to the discovery of a unique carbonate structure, with 300 meters gross interval. The structure constitutes a fractured reservoir that is highly likely to contain hydrocarbons.

The results have instilled confidence in the possibility that large oil and gas fields in Russia’s Black Sea waters can be discovered. The Company plans to conduct a thorough geological processing of the materials and to continue exploration and appraisal works on the license areas, Rosneft said.

Rosneft is carrying out the drilling of the first exploration well on the Zapadno-Chernomorskaya license area together with Italy’s ENI, Rosneft’s strategic partner. The drilling preparations included 4,000 running kilometres of a 2D seismic survey and over 3,000 square kilometres of a 3D seismic survey, as well as comprehensive engineering and geological studies.