Yu. Korchagin Field is located in the Russian Caspian Sea at depths between 11 and 13 m. The distance to the nearest shore (the Volga delta) is about 120 km. The nearest sea ports are Astrakhan (175 km) and Makhachkala (250 km), the closest railway stations are in Astrakhan, Makhachkala, Kizlyar and Derbent.
The offshore platform which is used for oil production was built entirely by the Russian companies. It employs the "zero-discharge" principle whereby all industrial or household waste is taken onshore for disposal.
From the infrastructural point of view, the field is comprised of the following facilities:
Ice-resistant platform (IRP-1) with a 560 ton carrying capacity to drill boreholes as deep as 7,400 meters. There are 30 wells.
Ice-resistant platform (IRP-2) used as living quarters. The living quarters accommodate 105 people. The endurance is 15 days.
Subsea pipeline. 58 km long, 300 mm in diameter, wall thickness of 16 mm. Floating oil storage. Deadweight of 28,000 tons, crew of 25.
The location of the floating oil storage is outside of the Caspian ice zone.
The field was subject to a state expert review and was found fully ready for commercial operation. The oil and gas ratio averages 60%:40%. The field’s reserves (oil equivalent) were estimated to be the following: 1P – 258 million barrels, 2P – 497 million barrels, and 3P – 757 million barrels.
Well infrastructure design. Upgrading of the basic semi-submersible monocoque hull (BSMH) started. BSMH construction began in 1988 and was put on hold in 1991. The inspection of the submerged hull done at LUKOIL’s request revealed that the hull was in good repair and could keep the platform going for 30 years. BSMH will be used at the field as an ice-resistant stationary platform.
April. Offshore stage of the field facilities construction began. IRP-2 substructure brought to location. May. IRP-2 substructure installed. Living quarters brought to location and installed on the IRP-2 substructure. July. Single-point mooring components loaded and transported to location. The offshore ice-resistant platform (OIRP), the main facility used in the development drilling and production of hydrocarbons towed to location. August. Single-point mooring installed. OIRP construction completed. A 74.2 m long bridge erected to connect two offshore ice-resistant platforms (OIRP) into a single complex. September. Floating oil storage (FOS) designed to load shuttle tankers and export oil from the field installed.
Development drilling commenced.
First oil produced at the field.
First tanker loaded with the field’s oil.
New project management techniques introduced. Application of the “Theoretical Maximum Performance TM” and the “Operating Rhythm TM” project management techniques at the Korchagin field made it possible to cut back on the drilling costs by 46%, which consequently led to 180 million USD of savings. Besides, the reduced drilling times resulted in 83 million USD of additional profits earned due to accelerated oil production and sales.
World record in horizontal drilling. While drilling well No. 108 off OIRP, LUKOIL set a new world record in the horizontally drilled meterage with a significant bottom displacement: 4,908 meters per drillbit run in the 9½ inch section without any tripping. The evidence of the record set by LUKOIL in well No.108 may be found in the Schlumberger/Smith Bits global database.
PJSC LUKOIL made it beyond the 5 mln. tons mark (38.6 mln. barrels) for the oil produced at Yu. Korchagin field in the Caspian Sea.