Russian oil company Rosneft, as a member of Sakhalin-1 consortium, has completed drilling of the “world’s longest well” from the Orlan platform at Chaivo field in the Sea of Okhotsk.
Rosneft said on Thursday that the length of the well with horizontal completion is 15,000 meters which, according to the company, was a world record.
This is a supercomplex well with a directional drilling index of 8.0 and 14,129-meter stepout.
“A number of world records have been set in extended reach drilling since the start of drilling at Sakhalin-1 project in 2003. Taking into account the new record long well, the Sakhalin-1 consortium drilled 9 out of 10 of the world’s longest wells,” the company added.
Sakhalin-1 is the first large-scale offshore project in Russia implemented under the PSA conditions. The members of the consortium are Rosneft, ExxonMobil, SODECO, and ONGC Videsh Ltd. The project includes three offshore fields, Chaivo, Odoptu and Arkutun-Dagi, located in the north-eastern shelf of Sakhalin.
The Orlan platform at the Chiavo field was completed in July 2005 while drilling began in December 2005. The platform has minimum structures for crude treatment because the produced oil is delivered to the Chaivo onshore processing facility.
Rosneft said that Sakhalin-1 extended reach drilling owes its speed to the “Fast Drill” technology which combines modeling of physical parameters of drilling with a structured approach to well designing.
According to the Russian company, the project has set five world records for measured depth of wells since 2013. In April 2015 development well О-14 with a length of 13,500m, the 13,000m-long Z-40 well was drilled and completed in 2014, wells Z-43 and Z-42 were drilled in April and June 2013 with the length of 12,450 and 12,700m, respectively.