Bodong sag and North Miaoxi sag near the Bonan heave develop buried strike-slip structure. Profiles of two sides of the strike-slip fault are characterized by seismic facies changes and tectonic inversion. The planar distribution is characterized by a combination of en-echelon faults,“broom-like structure”and so on. Different from the typical strike-slip fault in heave zone, the main buried strike-slip fault identification needs to integrate a variety of geological evidences. Three main strike-slip faults develop in the region of interest: one is in the south-central area, and the other two is in the west area, forming the east branch of Tan-Lu fault together.The main strike-slip faults develop only in the Pre-Tertiary and the bottom of the Paleocene, formed under the strength of twist and compress. The main strike-slip fault does not develop in the Neocene, and two different mechanical property fault groups develop: one group is synthetic strike-slip faults nearly north-east, with extensional-twisting character; another group is the associated normal fault nearly east-west direction, with the nature of extension and stretch. Tectonic reversion controlled by strike-slip is the decisive factor of the zonal distribution of trap cluster. Extensional normal fault can be divided into two phases having favorable effect on the hydrocarbon migration. Faults which have experienced early activities and extend from the deep to the shallow layers play a decisive role on hydrocarbon migration. Search for relatively active oil and gas migration objective is the key to success in this area.