Iran is expected to sign a deal with Total to develop its South Pars natural gas field, marking the return of Western oil companies to the country.
ENI's CEO told CNBC he is confident that OPEC countries would reach a consensus later this month.
Ten major oil and gas firms have set up a $1 billion fund to support new technology to combat greenhouse gas emissions.
Energy companies from around the world are chasing Iranian oil deals after the nation unveiled a new model contract for foreign investors.
Italian oil and gas company Eni is continuing to explore for oil but is focusing on areas it knows well, CEO Claudio Descalzi said.
A group called the Niger Delta Avengers has claimed responsibility for attacks on oil infrastructure that have sent Nigeria's crude output plummeting.
Oversupply may have sent oil prices lower, but in five years there won't be enough oil to meet demand, John Hofmeister says.
European equities finished the last trading day of the month sharply lower, as a raft of disappointing earnings dragged stocks deep into the red.
European markets closed mostly higher on Tuesday as investors eyed the volatile trade in commodity markets, ahead of Yellen's speech.
Oversupply and weak demand continue to grip volatile oil markets but several analysts have found a pocket of relative safety.
Energy companies are coming down to the last dollars in their wallets, a CNBC analysis found.
European markets closed mixed Thursday, as investors tried to find their footing amid a busy day for corporate earnings.
It was a bruising day for Europe's energy sector Thursday with the full extent of the pain caused by low oil prices being laid bare.
Bob Dudley has said that low oil prices are not all bad for the energy industry, as subsidies have been cut from petrol products around the world, which has resulted in fairer pricing.
Oil industry leaders have dismissed talk of the price of crude hitting the $20 lows predicted by analysts.
European stocks followed Asian equities lower on Monday on reports that China could stop propping up its equity markets.
Italian energy group Eni said it had discovered potentially one of the world's largest natural-gas fields off the Egyptian coast.
Claudio Descalzi, CEO of Eni, comments on the discovery of the largest known gas field in the Mediterranean.
Oil contractor's shares are Europe's biggest fallers after it slashed its guidance and axed 8,800 jobs as part of a restructuring plan.
Six oil and gas companies have banded together to ask the UN to let them help devise a plan to stop global warming.