OAO Gazprom said profit for the first half of the year fell by almost one-quarter as Ukraine's Naftogaz didn't pay for gas supplied by the Russian state-controlled gas group.

Statoil ASA (STL), Norway’s biggest energy company, will sell its 15.5 percent stake in the Shah Deniz field in Azerbaijan to Malaysia’s Petroliam Nasional Bhd for $2.25 billion as it seeks to reduce investment and prioritize high-value projects.

Norwegian oil company Statoil ASA ( STO ) said Tuesday that with its partner ExxonMobil Corp. ( XOM ) it has discovered 1.2 trillion cubic feet of natural gas, or 216 million barrels of oil equivalent, in the Giligiliani-1 well offshore Tanzania, the joint venture's seventh discovery in the block 2 area.

Petrochemical firm Ineos has bought a second licence for shale gas exploration and development in central Scotland.

The OPEC Reference Basket fell $4.77 to stand at $95.98/b in September, as sluggish demand and ample supply continue to weight on the oil market.

The continuing slump in global oil prices is punching holes in the budgets of oil-producing countries, including some OPEC members such as Iraq and Libya that are struggling with severe political and security problems.

With the rouble down 18 percent against the dollar this year and sanctions chipping away at economic ties with the West, ordinary Russians might be forgiven for rushing to put their money in a nice, "safe" foreign currency.

Morgan Stanley ’s deal to sell an oil trading business to Rosneft , the state-owned Russian oil group, is close to collapse amid the profound chill in relations between Russia and the US.

Russia's top oil producer Rosneft has turned to UK-certified lawyers in its fight against Ukraine-related Western sanctions which have hit the company's output and prospects for its push to tap Arctic riches.

Gazprom has said it could shelve its Vladivostok liquefied natural gas project as the Russian state-controlled energy giant focuses on supplying more gas to China by pipeline.

Crude oil prices stabilised Friday after dropping significantly this week.

The share-price boom at U.S. energy firms has gone bust, due to slumping global growth and tumbling crude prices.

This year's fall in energy prices is hastening the decline of big oil, as the seven Western majors sell-off assets, cut investment, return money to shareholders and shrink in size, leaving ever more output to small producers and state firms.

West Texas Intermediate extended its slump into a bear market amid speculation that rising global oil supplies will be more than enough to meet slowing demand. London’s Brent traded at the lowest price since December 2010.

European Energy Commissioner Guenther Oettinger has asked Ukraine and Russia to take part in another round of talks to try to solve a gas pricing row on Oct. 21 in Berlin, a Commission official said on Thursday.