The insulating layers of Xinglongtai dense oil horizon in Shuguang District,Liaohe Oilfields could be divided into three types such as mudstone,sandy mudstone,argillaceous sandstone.

• 辽河油田曙光区兴隆台稠油油层中隔层按岩性可分为泥岩类、砂(粉砂)质泥岩类、泥质砂(粉砂、砾)岩类。