A licence for the Tympuchikansky area was received in 2005, and for the Vakunaysky and Ignyalinsky fields in 2007.
The Chonskaya group is situated 80 km from the Eastern Siberia - Pacific Ocean (ESPO) pipeline. The group currently has a total of 57 wells. The licence holder is Gazpromneft-Angara, a wholly owned subsidiary of Gazprom Neft.
The increase in the Chonskaya group's reserves was made possible by drilling an exploratory well, re-testing previously drilled ones, and re-interpreting all of the existing geological and geophysical information, including information gathered from new 3D seismic exploration work and electrical exploration.
As a result of this work, a unified seismic model of the entire territory of licensed areas was prepared, which will be refined by subsequent geological surveys.
More than 10 prospecting and exploratory wells are expected to be drilled, 2-3 previously drilled wells are to be re-tested each year, and 3,000 linear kilometers and 600 square kilometers respectively of electrical exploration and 3D seismic surveys are to be carried out within the licence areas over the next three years.