The main reservoirs include the Lower Cretaceous Nantun Formation and Tongbomiao Formation and the rock types are sandstone, tuffaceous glutenite, tuff and base rock weathering crusts.

• 其主要储集层为下白垩统南屯组、铜钵庙组砂岩、凝灰质砂砾岩和凝灰岩及基岩风化壳。