氷海域における大型油ガス田開発 サハリン1プロジェクト

チャイウォ構造Phase-1開発

抄録

The Sakhalin 1 Project is one of the oil and gas development projects located on the northeast shelf of Sakhalin Island, water depth is 10 to 60 meters and the thick ice covers the area 6 to 7 months a year. The project was declared commercial by the Sakhalin 1 consortium in October, 2001, and started development period from this year. Total recoverable reserves are estimated at 307 million tons of oil and 485 billion cubic meters of natural gas. This project consists of three fields, Chayvo, Odoptu and Arkutun-Dagi, which are planned and conducted to develop in phases 1 to 4, using both offshore and onshore wells.
Many of these wells will be drilled using a new drilling technique called ERD (extended reach drilling), which allows oil and gas targets to be drilled by the rig located a great distance away.
The first phase of development is focusing on the oil production of Chayvo and Odoptu fields, and the start of the oil production from Chayvo field was commenced in October 2005.
The oil production reached to 250 Kbpd at peak rate in 2007. The produced oil is transported through the pipeline to the marine tanker terminal at Dekastri Located Khabarovsk province. Large marine tankers are escorted by icebreakers during winter season using a new developed ice passport concept for the year-round export operations.
These advanced technologies were applied to reduce the overall cost of development and to minimize environmental impact.