Abstract: The paper presents a new hierarchical modeling method for braided channel reservoir. According to the reservoir
hierarchy，the reservoir of braided channel and bar are first modeled，and then，the channel bed and discarded channel in the
braided channel，and the core bar and top bar in the bar，are modeled respectively. Finally，the mud interbed in the second order
reservoir is modeled. During the modeling，different order reservoir are constrained by each other，which revealed the sediment
rules. The braided channel reservoir model is established by this method in Saertu oilfield of Daqing. The result shows that the
shapes and distribution of different order reservoir are well reproduced. The model is highly precise and can be put into use in
reservoir development.

Key words: hierarchy, hierarchical modeling, mud interbed, braided channel reservoir, Saertu Oilfield