Juschno-Sachalinsk, Oktober 1 - Neftegaz.RU. As part of its exploration campaign, Rosneft has successfully completed the drilling of the 1st prospecting and appraisal well at the Vostochno-Pribrezhny license block on the shelf of Sakhalin Island, resulting in the discovery of a new oil field.
The well was drilled by Rosneft’s own drilling contractor RN-Burenie in accordance with the planned dates and all safety and environmental protection standards.
As a result of drilling, the measured depth was 3,047 m; the vertical deviation was 1,450 m. A well design that provided for drilling 2 holes with S-shaped paths was developed for optimal discovery of all intended targets in the course of drilling in difficult geological conditions. A set of geophysical studies in the open hole confirmed the oil saturation of productive formations.
Preparations are now underway to test the well in casing. According to preliminary estimates, the reserves are up to 2 million tonnes of oil, which will be included in the State balance sheet in 2019.