Oil at $35 a barrel is neither too high nor too low but just right to make shares of U.S. explorers worth buying, according to Goldman Sachs Group Inc.

The cumulative effect suggests that for U.S. growth over the next three years, there's no difference between oil at $30 or $70 per barrel. How the trade balance responds to swings in crude will dictate which path is more desirable.

Last month, the state-owned Southern Gas Corridor Company (SGCC) raised $1bn in a 10-year eurobond at 6.875% yield. However, it met only half of its original plan.

Total capital investment in the oil and natural gas sector is forecast to decline to $31 billion in 2016, down from a record $81 billion in 2014.

Halliburton Company (NYSE:HAL) and Baker Hughes Incorporated (NYSE:BHI) today announced that the companies intend to vigorously contest the U.S. Department of Justice's (DOJ) effort to block their pending merger. The companies believe that the DOJ has reached the wrong conclusion in its assessment of the transaction and that its action is counterproductive, especially in the context of the challenges the U.S. and global energy industry are currently experiencing.

The transaction combines two complementary technology portfolios into a pore-to-pipeline products and services offering to the global oil and gas industry. The merger will create technology-driven growth by integrating Schlumberger reservoir and well technology with Cameron wellhead and surface equipment, flow control and processing technology. This will result in the industry’s first complete drilling and production systems, which are enabled by Schlumberger expertise in instrumentation, data processing, control software, and system integration.

State-run Saudi Arabian Oil Co. increased its official selling price for May Light, Medium and Heavy sales to U.S. buyers by 40 cents a barrel, the company said in an e-mailed statement Tuesday. Extra Light crude will sell at a premium of $2.60 a barrel to the regional benchmark, 75 cents higher than the differential in April. For the U.S., the benchmark is the Argus Sour Crude Index.

Front month U.S. West Texas Intermediate (WTI) crude futures were trading at $38.02 per barrel at 0653 GMT, up 76 cents, or 2 percent, from their last close. International Brent futures were up 60 cents at $40.03 a barrel.

Gas shall play a more important role, with more shares in the total Chinese primary energy mix. And, the Chinese natural gas market is at a turning point, as indicated by many experts at Gastech 2015’s conference. The Chinese gas industry is facing many challenges also because of gas demand contraction due to the new normal Chinese economy. In the previous 10-15 years, we had double digit gas demand growth, but in 2014-2015 it was only single digits. Last year it was only 8.6%. This year, in the last 3 quarters, the growth was only 2.7%.

The prospect of Sino-Russian gas cooperation could be very broad and more importantly decades of negotiation, joint projects and interactions have laid the foundation for future cooperation.

Year-to-date, the goods and services deficit increased $10.8 billion, or 13.1 percent, from the same period in 2015. Exports decreased $20.5 billion or 5.5 percent. Imports decreased $9.7 billion or 2.1 percent.

Mexico's proven oil and gas reserves dropped 21.3 percent in 2015, the oil regulator said on Thursday, as the state-run oil company, Pemex, cut back on investment because of plunging crude prices.

Prices, which have swung between highs of about $42 a barrel and lows of about $27 this year, will continue to be volatile in the short term, Al Jaber said in an interview with Abu Dhabi dailies The National and Al Ittihad.

OPEC secondary sources put Iran's current output at 2.93 million barrels per day (bpd). It is working to regain market share, particularly in Europe, after the lifting of international sanctions in January. The sanctions had cut crude exports from a peak of 2.5 million bpd before 2011 to just over 1 million bpd in recent years.

Brazil’s troubled state-run oil company Petróleo Brasileiro SA on Friday announced a beefed up voluntary layoff program that could affect up to 12,000 jobs amid intense efforts to cut costs.