ignimbrite

1., volcanic lava and pyroclastic rocks, of which the lithophysa rhyolite, pellets rhyolite and ignimbrite are favorable reservoirs.Lithofacies can be divided into 5 facies and 16 subfacies.

研究表：该区火分为火熔和火碎屑两大类，其中石流纹、球粒流纹及熔结凝灰为有利储。