early stage of oil reservoir

• 古油藏

early stage of oil reservoir的用法和样例：

例句

1. The ancient asphalt-oil pool in this area is a sort of asphalt oil pool that has multiperiodic and multisource geneis and has gone, strong evolvemens in the late period.
   这一地区的沥青古油藏是一种多源多期成因，并经历了后期强烈改造。