For the United States and Russia, total petroleum and natural gas hydrocarbon production, in energy content terms, is almost evenly split between petroleum and natural gas. Saudi Arabia's production, on the other hand, heavily favors petroleum. Total petroleum production is made up of several different types of liquid fuels, including crude oil and lease condensate, tight oil, extra-heavy oil, and bitumen. In addition, various processes produce natural gas plant liquids (NGPL), biofuels, and refinery processing gain, among other possible liquid fuels.

"Currently, Iran's crude oil exports, excluding gas condensates, have reached 2 million barrels per day (bpd)," Javadi said. "Iran's crude oil export capacity will reach 2.2 million barrels by the middle of summer."

India said Monday it will invest up to $500 million in a deal to develop a strategic port in Iran and both countries planned a number of projects they say are worth hundreds of millions of dollars.

Established in 1998, Petropars was founded to contribute toward the development of Iran’s vast energy resources. It specializes as a developer of exploration, exploitation and production in upstream projects.

BP has the lowest amount of pre-FID (final investment decision) resource, which leads to the weakest future growth rates.

CNPC and Mozambique’s national oil and gas company ENH have signed a cooperation framework agreement under which the two sides will reinforce cooperation in oil and gas exploration and production, and natural gas processing and marketing.

Brent futures LCOc1 were down 18 cents at $48.54 a barrel as of 0421 GMT, after ending the previous session 9 cents down. U.S. crude futures CLc1 fell 26 cents to $48.15 a barrel, having settled down 41 cents in the previous session.

China's crude oil imports from Russia surged 52.4 percent in April from a year earlier to reach a record 1.17 million barrels per day (bpd), customs data showed on Monday, ahead of the previous record of 1.13 million bpd in December.

International Energy Agency (IEA) Executive Director Fatih Birol said last month that global upstream investment fell by 24 percent in 2015 and is set to fall by 18 percent in 2016.

The average price of LNG shipments into the country was about $6.32 per million British thermal units in April, the least since August 2005, according to Bloomberg calculations based on preliminary data from the Ministry of Finance. Prices are expected to rebound in coming months as crude values have surged, according to Junzo Tamamizu, managing partner at Clavis Energy Partners LLC.

Leviathan, one of the largest offshore discoveries of the past decade, was found in the eastern Mediterranean in 2010 and has been mostly earmarked for exports.

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The Barents Sea is characterized by low exploration maturity with a high resource potential. Operators have discovered 3.3 billion boe in the Barents Sea since exploration began, and the region has an estimated undiscovered potential of 7.6 billion boe. About 5 billion boe is expected to gas and condensate.

Saudi Arabia’s debt plans come as falling oil prices encourage other Gulf countries, including Abu Dhabi and Oman, to turn to capital markets for funding, setting a new record for borrowing by Middle Eastern governments so far in 2016. This week, Qatar said it was looking to tap dollar bond markets for the first time in five years.

Oil Search Ltd. has moved to consolidate natural-gas developments on Papua New Guinea with a US$2.2 billion deal to buy U.S.-listed midsize energy company InterOil Corp amid a growing natural gas glut.