Qatar's proved reserves of gas are the third-largest in the world, exceeding 250 trillion cubic feet (7,000 km3). The economy was boosted in 1991 by completion of the $1.5-billion Phase I of North Field gas development.
Qatar's proven gas reserves rank third globally, surpassing 250 trillion cubic feet (7,000 km³). The economy was stimulated in 1991 by the completion of Phase I of North Field gas development, which cost $1.5 billion.