指出中国利用国外油气的必要性，重点分析了伊拉克、伊朗、巴西、加拿大、委内瑞拉和北美油气上游合作的机会及世界油气国际合作的合同变化趋势，提出了当前扩大油气上游国际合作的主要方向。

The paper emphases the necessity of making use of overseas oil and gas, and mainly analyzes the upstream cooperation situations and opportunities of Iraq, Iran, Brazil, Canada, Venezuela and North America and the contact variation trends of the world oil and gas international cooperation,and then points out the main directions to expand present upstream international cooperation.