Saudi Arabia has been fighting with fellow OPEC members since the oil rout started two years ago. For the first time next week, it can argue convincingly that its strategy of squeezing rival producers is succeeding.

Nigeria's crude oil and condensate production has fallen almost 50% from the start of the year to around 1.1 million b/d.

Oil companies operating in Norway expect to spend 153.2 billion kroner ($18.47 billion) on exploration and production next year, the weakest figure since 2011 and nearly a third below the sector’s all-time high of NOK220.7 billion two years ago. In 2016, they expect to spend NOK165.9 billion on exploration and production, down from NOK195.4 billion a year earlier and 1% below a similar estimate made in February.

The sharp drop in oil prices over the past two years has led companies including Exxon Mobil and Royal Dutch Shell to sharply reduce budgets, particularly for exploration, where spending fell in 2015 to around 95 billion from $168 billion two years earlier, according to Morgan Stanley.

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."

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.

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.

Crude oil production fell 7.8 percent from April 2015 to average 8.9 million barrels per day in April, the lowest output level in 20 months. Natural gas liquids (NGL) production, a co-product of natural gas production, rose from prior year. NGL production in April averaged 3.3 million barrels per day, 0.7 percent higher than last year. This was the highest April output level on record.