After more than a year and a half after continued low oil prices rose this year, there has been a long absence, WTI oil prices from February lows highest level rose as high as 75%.

For this wave rally, the market is widely interpreted as the main driving force from the supply shocks: "Niger Delta Avengers (Niger Delta Avengers)" military gang busted important domestic pipeline, Alberta, Canada, for many years a rare forest fires, oil workers in Kuwait the three-day strike, Venezuela's oil facilities were damaged.

Goldman Sachs global head of energy research Damien Courvalin team produced a diagram showing the supply of crude oil, respectively, these factors lead to interruption of the scale (below).

Among them, the Canadian pipeline explosion and fire lead to conflict in Nigeria has led to crude oil supply in May plummeted 350 million barrels, it is the main driver of the current round of rising oil prices.

Goldman Sachs believes that

"Although in the past month supply disruption scale growth, but we believe that the market has not yet reached the state of demand, because we continue to see the supply elsewhere are showing growth."

Goldman Sachs believes that Canada's forest fires caused chaos expected to be completed end of June, with the Nigerian rebels also began negotiations on oil prices upward momentum began to dissipate.

Therefore, the next few months, oil prices will hover between 45-50 US dollars, the second half of this year, crude oil shortage situation will continue moderate.

However, Goldman Sachs also said that next year a quarter of the market will return to oversupply.