Abstract: Upper Tertiary in Bohai oil province is the sedimentation of fluvial facies, which has not source rock. The accumulated oil and gas in the trap came from the Lower Tertiary hydrocarbon source rock 2000~5000 meters below. Therefore, the study of oil and gas migration is of great importance. Fault is the main migration channel in Bohai oil province. Based on the exploration practice for decades, the large fault of successive development is regarded as the migration channel for shaping of the large and medium-size oil fields. The small fault in the activities of the late stages is limited in migration capability. The straight strike-slip fault is relatively poor in migration capability. The stratum-fault controls the position of oil and gas accumulation. The Upper Tertiary oil fields in the depression are mostly distributed in the downthrow block of the large fault