Kashagan is one of the largest oil discoveries of the last 40 years, and one of the largest industrial operations currently under development worldwide.
The Soviets had been working in the region, but it was the fall of communism that turned this once-backwater into the world's most expensive energy project.
The field lies in a remote corner of Central Asia, in the northern part of the Caspian Sea, making logistics a challenge. The oil will need to be moved out by a series of interconnecting rail lines, pipelines and ships.
Harsh weather is also a problem. The northern Caspian is frozen for nearly half the year. To successfully tap oil and gas in the ice-choked region, the companies involved are constructing a series of artificial islands from which to work.
Here, housing for workers is being built on one of the islands.
Oil production in Iraq surpassed 3 million barrels a day in July, putting it ahead of longtime rival Iran.
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