Lithology of Tertiary oil bearing reservoir in Taibei Sag is mainly fine sandstone and petrological types are mainly lithic arkose and hybrid sandstone.

• 台北凹陷第三系含油储层岩性以细砂岩为主,岩石学类型以岩屑长石砂岩和混合砂岩为主,含气储层岩性以砂砾岩为主,岩石学类型为岩屑砂砾岩。