Bendong block is the biggest one that is not developed in
Yanqi Basin. The structure of this block has changed a lot while
drilling. So the plausible cognition of structure restricts the
development of Bendong block. The conformation of this
precipitous anticline is confirmed by integrated using seismic ,
geologic , drilling data etc in the practice of exploitation. Then
the position and cover depth of eminence of the anticline is made
certain by some fine studies.