On 26 September 2019, Rosneft announced that it identified 70 m of oil saturated intervals within the Dagi Formation (Miocene) in its first wildcat drilled at the Pribrezhnyy Vostochnyy license offshore Sakhalin. Deviated Pribrezhnaya Vostochnaya 1, spudded in May 2019, was drilled to 3,047 m (TVD 2,500 m) with a horizontal displacement of 1,450 m. By the end of September, the company was preparing to test the well in casing. The well, drilled from the coast, is aimed at exploration of the Pribrezhnyy Vostochnyy prospect located in the shallow Nabil Bay. Schlumberger is providing integrated services with engineering support for drilling and Halliburton is providing hydrodynamic survey services.  In 2013, Rosneft obtained the block covering 56 sq km in the Nabil Bay. In 2016, the company completed a 3D seismic survey which was a challenging task due to extremely shallow water and surrounding marshes. Recoverable resources of the prospect were estimated at 21 MMbbl of oil. In 2019-2020, Rosneft plans to drill and complete well Pribrezhnaya Vostochnaya 2 with a PTD 3,490 m (TVD 2,300 m) and a horizontal displacement of 1,950 m.
Pribrezhnaya Vostochnaya 1 nfw (Rosneft 100%), 1st well in Pribrezhnyy Vostochnyy licence, shallow-water Nabil Bay off Sakhalin, shore-based drilling, TVD=2500m, 1,450m horiz leg, 70m of oil-saturated intv's identified in the Miocene Dagi fm, cased testing planned. 