一、2011年上半年石油市场回顾2011年上半年,国际原油市场先扬后抑,原油价格连续4个月上涨后转为下行趋势。1～4月席卷中东和北非的反政府示威活动引发的动荡局势以及日本3月份大地震引发的核危机是支配石油市场走势的两大关键因素。尽管日本核危机的恐慌情绪和欧洲主权债务危机的担忧在一定程度 I. Review of the Oil Market in the First Half of 2011 In the first half of 2011, the international crude oil market started a downturn. The crude oil price turned to a downward trend after rising for four consecutive months. The turmoil triggered by the anti-government demonstrations sweeping the Middle East and North Africa from January to April and the nuclear crisis triggered by Japan’s March earthquake are two key factors that dominate the oil market. Although the fears of the nuclear crisis in Japan and the sovereign debt crisis in Europe to some extent