Caspian Sea
The sea has a surface area of 371,000 km (143,200 sq mi) (not including the detached lagoon of Garabogazköl) and a volume of 78,200 km(18,800 cu mi). It has a salinity of approximately 1.2% (12 g/l), about a third of the salinity of most seawater.
Kashagan Field
Interest in the Caspian Sea first began in 1992 when an exploration program was announced by the Kazakh government. They sought the interest of over 30 companies to partake in the exploration. In 1993 the Kazakhstancaspiishelf was formed which consisted of Eni, BG Group, BP/Statoil, Mobil, Royal Dutch Shell and Total S.A., along with the Kazakh government. This consortium lasted 4 years until 1997, when seismic exploration of the Caspian Sea was undertaken.