A unique for the industry multilateral well with eight branch holes by the fishbone* technology was built at East-Messoyakha field. The length of the productive hole is 5.1 km, the total drilling rate is 9.1 km. The oil-saturated layer in the drilling area did not exceed 12 m.
Fishbones are the trademark of Messoyakhaneftegaz. The multilateral well design increases the well productivity by 40% compared to a standard horizontal well and allows directing each branch to separate oil zones without opening sections with gas or water. The use of this technology is relevant for East-Messoyakha field’s geological structure, where reserves are located in split sandy deposits with clay bands at the depth of less than a kilometre.
Last year, 131 high-tech wells were built at the field, every fourth with using the fishbone technology. In 2019, 25 new similar wells with a large number of branch holes will be constructed at East-Messoyakha field.
Note for Editors:
The Messoyakha cluster includes the East-Messoyakha and West-Messoyakha fields located on the Gydan peninsula of the Yamalo-Nenetsky Autonomous District.
The licenses for both blocks are owned by Messoyakhaneftegaz, which is controlled by Gazprom Neft and Rosneft on a parity basis. Gazprom Neft performs as the project operator.
The East-Messoyakha field was launched by President of the Russian Federation Vladimir Putin during a video conference on September 21, 2016. The 2018 East-Messoyakha output amounted to 4.5 million tonnes of oil.
*Fishbone is a multilateral well with a special trajectory – one horizontal borehole derives many branches. That makes the well look like a fish skeleton, thus the name. The well trajectory significantly increases the coverage of oil-saturated areas compared with traditional horizontal well with smaller scope of drilling activities.
Rosneft
Information
Division
February 11, 2019
