Abstract: Based on the influential factors of low relief structural recognition, we performed seismic forward modeling to the low relief structural features of Jurassic Qiketai Formation in the PubeiPutaogou area, Taibei depression, TurpanHami Basin. We also conducted low relief structural reservoir model analysis on paleogeomorphic features and sedimentary facies distribution characteristics. The results show that the low relief structural recognition of the Jurassic Qiketai Formation in the PubeiPutaogou area is controlled and influenced by the burial depths and average velocities of the overlying strata. Shallow burial and relatively small average velocity are easily recognizable characteristics of low relief structure. The Huoyan Mountain fault and mudstone-covered strata of Qiketai Formation controlled the vertical migration of low relief structures in this area, while the gentle slope fault fracture, combined with the mudstone capstones in the upper part of Qiketai, controlled the mode of accumulation resulted from low relief structural lateral and vertical migrations.

Key words: TurpanHami Basin, Taibei depression, Jurassic, low relief structures, forward modeling, accumulation analysis