Abstract: According to the analogy theory, different materials are selected for physical modeling of impact of inhomogeneous salt-bearing basement deformation on caprock structures under bilateral compressions. The experiment shows that ①structural styles in overburden fine-sand caprock are different under bilateral compression settings and impact of different characteristic basements made by rigid foam and Vaseline; ②the overburden structural styles were asymmetric although the bilateral basement structures of the model are basically symmetric; ③collapse structures occurred in salt-apex overburden sand layers during late period of deformation; ④the final experimental result indicates that the whole antiformal overburden structures are shaped by the combination of two separate substructures.

Key words: salt structure, basement structure, caprock, deformation, physical modeling