Exploring the Korean continental shelf was the key role for KNOC when it was established by the government.
Since the early 1980s, KNOC has drilled 47 wells in the continental shelf to explore possible gas and oil reserves.
The corporation successfully discovered gas in Donghae in 1998 and 2003.
Donghae-1 became the first domestic production field in July 2004 with daily production of 50 million square feet of natural gas and 1,000 barrels of crude oil.
Since beginning production in 2004, the Donghae-1 gas field has increased profitability with cost-cutting efforts.
A new gas field, B5 layer, near Donghae-1 was discovered in 2002 and developed in 2008.
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