Sakhalin-1 project drills record long extended reach well

The drilling of the world's longest extended reach well has been successfully completed at the Chayvo field off the coast of Sakhalin Island, Exxon Neftegas Limited (ENL), the operator of the Sakhalin-1 project, said on Tuesday.


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The shaft of the Z-44 well is 12,376 meters long, which is equivalent to 23 Ostankino television towers.

The company is proud of this achievement, which furthers the successful implementation of this remarkable project, ENL's press service reported president James Taylor as saying. Six of the world's ten longest wells, including Z-44, have been drilled in Russia for the Sakhalin-1 project using ExxonMobil drilling technology, and it is very important that this remarkable achievement was made with excellent safety and environmental protection indicators, he said.

Chayvo, one of the three Sakhalin-1 fields, is located off the northeast coast of Sakhalin Island in eastern Russia, in one of the world's harshest subarctic regions. Extended reach drilling makes it possible to drill from onshore under the seabed to the oil and gas reservoirs in a safe and environmentally responsible manner.

The Sakhalin-1 project is being carried out by an international consortium that includes ENL (the operator, with a 30% stake), the Japanese consortium SODECO (30%), India's ONGC Videsh Ltd (20%), and affiliates of Russian state oil major Rosneft - RN Astra (8.5%) and Sakhalinmorneftegaz Shelf (11.5%).

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