Turkey said in February it struck a deal giving it a 10.25 percent price discount on gas from Russia's Gazprom but that accord was not signed and state pipeline operator Botas said last week it had appealed to the International Chamber of Commerce (ICC) after months of fruitless talks. "An agreement was clinched on the 10.25 percent, therefore we are taking that as our base level, but will seek a higher discount at international arbitration," Alaboyun said in an interview.

It plans to sell $20 billion of asset in the two years to the end of 2015 and reiterated a plan to dispose off $30 billion from 2016 to 2018, following the acquisition of BG Group.

Shell agreed to buy British rival BG Group for 47 billion pounds ($69.7 billion) in April, in a deal widely seen as an effort by the energy company to adapt to lower prices. The deal will boost Shell's oil and gas reserves by 25 percent and give it a bigger presence in the fast-growing liquefied natural gas market.

Brazil’s largest oil workers union, known as FUP, joined several smaller striking unions on Sunday to protest Petrobras’ plans to sell up to $15.1 billion worth of assets and slash its 2016 budget down to $19 billion, a 30 percent reduction.

Kazakhstan's vast Kashagan oil field, the world's biggest oil find in decades, is expected to restart production at the end of 2016, Exxon Mobil Production Vice President John Chaplin said.

Nigeria's government has approved the payment of 413 billion naira ($2.1 billion) to oil marketers as outstanding payment for fuel subsidy claims, the state-run Nigerian National Petroleum Corporation (NNPC) said.

Fernando Assing, TESCO's Chief Executive Officer, commented, "We continue to be impacted by market conditions that reduced drilling activity and pricing. We are positioning our business under the assumption that the market will be lower for longer. Consistent with our commitment of sustainability through the current market, we implemented additional global restructuring actions in the third quarter with annualized savings of approximately $5 million, bringing our total annualized savings from restructuring to $40 million. These actions are designed to lower our cost structure and better match current market activity. We continue to see opportunities to improve our operating performance and improve cash generation".

"Energy resources are plentiful. Concerns over running out of oil and gas have disappeared," Eyton said at the launch of BP's inaugural Technology Outlook.

Internal OPEC squabbles are on the rise as members argue about the need to support a fair oil price and boost revenues just as they feel more pain from low crude prices.

"It is evident that the global oil dynamic has experienced a fundamental shift, driven by the resilience in supply," said CEO Asim Ghosh. "Back in 2010, we made the decision to stay diversified, integrated and begin a transition into a low sustaining capital business. In a lower for longer world, our low sustaining capital projects in the Asia Pacific Region, oil sands, heavy oil thermals and Downstream margin business have become even more strategic.

Sakhalin II is one of the most successful export projects targeting the Asian-Pacific region. The key to success lies in integration: it is managed and operated by Sakhalin Energy Company and its shareholders: Gazprom (50% and 1 share), Shell (27.5% minus 1 share), Mitsui (12.5%), Mitsubishi (10%).

Chevron Corporation (NYSE: CVX) reported earnings of $2.0 billion ($1.09 per share – diluted) for third quarter 2015, compared with earnings of $5.6 billion ($2.95 per share – diluted) in the 2014 third quarter. Foreign currency effects increased earnings in the 2015 quarter by $394 million, compared with an increase of $366 million a year earlier.

Exxon Mobil Corporation today announced estimated third quarter 2015 earnings of $4.2 billion, or $1.01 per diluted share, compared with $8.1 billion a year earlier. Significantly lower Upstream realizations more than offset higher Downstream and Chemical earnings.

During the 3-month period ending Sept. 30, an overall total of 51 oil and gas deals took place, accounting for $91.2 billion, which was higher than the 47 deals worth $38.8 billion that occurred in the previous quarter, but still down from the 83 deals worth $125.7 billion that occurred in third-quarter 2014.

ConocoPhillips (NYSE: COP) reported a third-quarter 2015 net loss of $1.1 billion, or ($0.87) per share, compared with third-quarter 2014 earnings of $2.7 billion, or $2.17 per share. Excluding special items, third-quarter 2015 adjusted earnings were a net loss of $466 million, or ($0.38) per share, compared with third-quarter 2014 adjusted earnings of $1.6 billion, or $1.29 per share. Special items for the current quarter related primarily to the termination of a rig contract for a Gulf of Mexico deepwater drillship, non-cash impairments, restructuring costs and pension settlement expense.