令和元年度地質・探鉱部門シンポジウム
Ichthysガスコンデンセートフィールド周辺の探鉱
－LNGの長期安定供給に向けて－
2020 年 85 巻 1 号 p. 17-26
詳細
2020 年 85 巻 1 号 p. 17-26
The Ichthys LNG Project is a large-scale LNG project operated by INPEX Corporation, the first Japanese operator of a world class LNG project. The project commenced production of gas from the wellhead in July 2018.
The gas and condensate production rates in the first quarter of 2019 were about 1,100 MMcf/day and 40,000 bbl/day, respectively. Production is expected to reach a plateau.
The Ichthys gas-condensate ?eld （Ichthys field） that supplies gas and condensate to the LNG project, is located in the Browse Basin, on the Northwest Shelf of Australia. Gas bearing sandstone reservoirs of the Ichthys field extend over about 600 km2. The upper reservoir of the Ichthys field is the Brewster Member, which consists of submarine channel and lobe complex sandstones. The lower reservoir is the Plover Formation, which consists of fluvial and deltaic sandstones.
These reservoirs have been main target for petroleum exploration in the Browse Basin.
To make effective use of the Ichthys project facilities, which were designed to produce LNG for 40 years, it is necessary to discover new gas fields surrounding the Ichthys field, to maintain a stable production plateau for the long term. Since exploration for large, conventional structural traps has reached a mature phase in the Browse Basin, it is necessary to focus on more challenging new exploration plays in the basin, such as stratigraphic plays and deep structural plays.
