The interlayer in super heavy oil reservoir affects the expansion of SAGD steam chamber, which greatly restricts the thermal recovery development of this kind of heavy oil reservoir. Taking the wetland fan reservoir of Haqian 1 block in Chunhui Oilfield as an example, through the comprehensive analysis of drilling, logging, analysis and test and field outcrop data, this paper has carried out the lithology identification of complex glutenite body, studied the configuration in the wetland fan, and quantitatively described the intercalation in the sandy conglomerate reservoir of Badaowan Formation of Haqian 1 block. Finally, a three-dimensional geological model which can reflect the spatial distribution characteristics of different types of interlayer is established. The results show that lithologic interlayer and physical interlayer are mainly developed in the study area, which are mainly distributed in fine-grained sediments between the 5-level interface braided flow zone, between the 4-level interface braided flow channel and sand dam, and in the 3-level interface braided flow channel. The extension length/interlayer thickness is about 20 ~ 50, and the interlayer extension is less than 70 m. This study provides a geological basis for the screening of SAGD test area in Haqian 1 block, and is also of great significance for the development of similar reservoirs.