On 14 April 2015, Rosneft, as part of the Sakhalin-1 Consortium, successfully completed drilling of the world’s longest well at the Chayvo field, off the coast of Sakhalin Island.
The O-14 production well was drilled with the Orlan drilling platform in direction of the field’s south-eastern point and features the world-record measured depth of 13,500 meters and a horizontal reach of 12,033 meters.
Since the beginning of the drilling program in 2003, Sakhalin-1 has set several world records in extended reach well drilling. In 2013, two consecutive world records for measured depth were set as part of the Sakhalin-1 project. In April of that year, the Z-43 well reached 12,450 meters of measured depth and in June the Z-42 well reached 12,700 meters of measured depth and a horizontal reach of 11,739 meters. In April 2014, the drilling team drilled and completed the Z-40 well at the Chayvo field. Until the completion of the O-14 well, this well had a record measured depth of 13,000 meters and horizontal reach of 12,130 meters.
The Sakhalin-1 extended reach drilling is among the fastest due to the use of ExxonMobil’s proprietary Fast Drill technology. This technology allows bottleneck identification in the drilling process and solution development to enable optimal drilling and completions, plus it minimizes the areas involved in the drilling and production operations and thus reduces the impact on the environment.
The Sakhalin-1 Consortium was formed in 1996 as the first major shelf project in Russia created under terms of a Product Sharing Agreement. The international consortium consists of ExxonMobil, Sodeco, Rosneft and ONGC Videsh and includes development of three offshore fields: Chayvo, Odoptu and Arkutun-Dagi, which are situated off Sakhalin Island.