It pumped 3.32m barrels of oil equivalents a day.

The company's international reserves stood at 6.24 billion barrels oil equivalent in 2008.

As of December 31, 2011, it proved reserves were 461.9 million barrels of oil equivalent.

That purchase would add 2.7 billion barrels of oil equivalent to its reserves, Lukoil said.

Northern Ireland's total primary energy consumption is approximately 4.90 million tonnes of oil equivalent.

It could contain up to 33bn barrels of oil equivalent.

Production in the fourth quarter was a record 120,000 barrels of oil equivalent a day.

The company estimates that there are about 40 billion barrels of oil equivalents in the deepwater region.

Mr. Dodge, for example, converts the value of natural gas reserves into an oil equivalent, based on price.

In 2008, the average number of barrels of oil equivalents produced was 1.199 million.