The key contributors to evaluation for the lower structural section in Tazhong area are maintenance of paleo pools and later charging of hydrocarbon, especially the lithological traps within favorable accumulation area.

• 塔中地区下构造层关键评价要素是古油气藏保存条件和有无晚期油气补充条件,特别应注意位于有利油气汇聚区的岩性圈闭。