The Middle and Lower Jurassic reservoirs are composed of feldspathic-quartz sandstone,lithic-quartz sandstone and quartz sandstone in the east Qaidam Basin.

• 柴达木东部地区中、下侏罗统主要储层段砂岩的岩石类型以长石石英砂岩为主,还包括有岩屑石英砂岩、石英砂岩等;