BP has started up the $28-billion Shah Deniz 2 project offshore Azerbaijan, the first subsea development in the Caspian Sea, the company claims.
First commercial gas deliveries are under way to Turkey, according to Offshore report.
At peak, the facilities should produce 16 bcm/yr of gas to supplement current Shah Deniz production, the report says.
They include 26 subsea wells, a subsea production system, two bridge-linked offshore platforms, and 500 km (310 mi) of subsea flowlines.
Gas is transported to the Sangachal terminal near Baku, where new processing and compression equipment has been installed.
The South Caucasus Pipeline through Azerbaijan and Georgia has also been expanded to accommodate the extra throughput, with two new compressor stations and a metering station added in Georgia.
Shah Deniz 2 is the starting point for the Southern Gas Corridor series of pipelines that will deliver natural gas from the Caspian Sea direct to European markets from 2020.
Partners are; BP 28.8percent, SOCAR 16.7percent, Petronas 15.5percent, Lukoil 10percent, NICO 10percent and TPAO 19percent.