随着全球经济一体化趋势的发展以及世界各国对环境保护要求的增多和对可再生性能源利用的重视 ,近两年来 ,国际石油工业发生了一些新的变化 :一是一些产油国正在使其国有石油公司私有化 ,至少部分向外国资本开放。二是大部分产油国都向跨国公司开放了石油上游业务。三是大型石? With the development of global economic integration and the increasing demands for environmental protection and the emphasis on renewable energy utilization in various countries in the world, some changes have taken place in the international petroleum industry in recent two years. First, some oil producing countries are making Its state-owned oil companies are privatized, at least partly, open to foreign capital. Second, most oil-producing countries have opened their oil upstream businesses to multinational corporations. Third, large-scale stone?