Rosneft Oil Company, as part of the Sakhalin-1 Consortium, has successfully completed drilling from the Orlan platform at the Chayvo well in the Sea of Okhotsk, the longest well in the world.
The length of the well with a horizontal end is 15000 m, which for today is a world record. The well belongs to the category of supercomplex, the complexity index for DDI (Directional drilling index) is 8.0 points, the departure from the vertical is14,129 m.
Since the start of the drilling program in 2003. In the framework of the Sakhalin-1 project, several world records were set for drilling wells with a large deviation from the vertical. Taking into account the new record deep well, to date, the Sakhalin-1 Consortium has drilled 9 out of the world’s 10 longest wells.
The rate of well penetration with a large deviation from the vertical at the Sakhalin-1 project is one of the highest in the world due to modern and efficient technologies, such as Fast Drill. This technology combines high-quality modeling of physical parameters of drilling with a structured approach to well design. Drilling of wells with large waste allows to reduce the costs of construction of additional offshore structures, pipelines and other elements of the fishing infrastructure, and also reduces the impact on the environment due to a reduction in the area of drilling and mining operations.
Since 2013, the project has already set five records for drilling wells with the largest depth in the trunk in the world. Thus, in April 2015, a production well O-14 was drilled, the length of which was 13 500 meters, in April 2014, the Z-40 well was drilled and completed 13,000 meters, in April and June 2013, Z-43 and Z-42 wells were drilled with a length of 12,450 and 12,700 meters respectively.