The control of palaeotopography on the distribution of sandbodies has been well studied in continental rifted basin

while the control of palaeotopography dynamic changes caused by syndepositional structure movement on the sand distribution is less studied.Through the systematic study of tectonic-sequence stratigraphy and sedimentary facies of the Paleogene Dongying Formation in the central-south Liaoxi salient

the LST

TST and HST are recognized in the 2

nd

member of the Dongying Formation according to system tract boundaries and the seismic reflection features of deltas.A high resolution sequence stratigraphy framework is established.On the basis of the fine division and correlation of sequence stratigraphy unit

the paper studied the palaeotopography and the development and evolution of depositional system.The study reveals that braided river delta

meandering river delta

sublacustrine fan and lake are well developed in the study area.There are three transform belts along the boundary fault in the salient from north to south.The areal and spatial variation of activity of the transform belts is the key factor controlling the migration of delta lobes.Four types of stratigraphic-lithologic traps

including fault-lithologic trap

sandstone updip pinchout trap

lithologic trap and stratigraphic overlap trap

are recognized in the 2

nd

member of the Dongying Formation based on the sandbody characterization of each system tract.