The reservoirs have the medium texture maturity and lower maturity composition.Reservoir lithology is mainly feldspathic litharenite, feldspar quartz sandstone, lithic feldspar sandstone.

• 研究区须家河储层岩石类型呈现结构成熟度中等,成份成熟度较低的特点,以岩屑长石砂岩、长石石英砂岩和长石岩屑砂岩为主；