The reservoir of the Zilaitun oil-field is mainly composed of fine sandstone and siltstone and characterized by small grain size and high shale content.

• 河北沧县自来屯油田储层主要为细砂岩、粉细砂岩,粒度细,泥质含量高,以阿尔奇公式为基础的电阻率测井解释结果与储层实际含油性差别较大。