Section 1 summarization 油气运移是指油气在地下因自然因素所引 起的位置迁移( Migration of oil and natural gas is their position migration by the nature factors underground)Section 1 Summarization 油气运移是指油气在地下因自然因素所引 起的位置迁移(Migration of oil and natural gas is their position migration by the nature factors underground)