The Triassic sedimentary system in Block T of Tahe oilfield is rarely documented.Based on the sequence stratigraphic division

the core

logging and seismic facies

as well as normalized seismic waveform attributes were integrated to analyze the relationship between sedimentary systems and tectonic movements of the foreland basin

and to establish the Triassic sedimentary model of Block T in Tahe oilfield

Tarim Basin.The results show that the Triassic in Block T of Tahe oilfield can be divided into six long-term base-level cycles

inside which the braided river delta

fluvial and lacustrine se-dimentary facies are identified;the normalized seismic waveform attribute analysis shows that the braided river delta-lacustrine sedimentary system presents a migration from the near north-east to the north

while the fluvial sediments were deposited in a nearly east-west direction.During the active period of thrusting

the tectonic subsidence in the proximal realm of the basin resulted in the rapid proximal accumulation of a large amount of coarse-grained sediments

forming a braided river delta-lacustrine sedimentary system with a transportation direction approximately perpendicular to the orogenic belt;while during the quiescent period of thrusting

tectonic uplifting occurred in the proximal realm of the basin

the terrain grew gentle and the fluvial transportation got weak.As a result

the fine-grained sediments were deposited in the nearly EW-trending fault zones formed during the thrusting period

forming the fluvial sedimentary system with a sediment transportation direction approximately parallel to the orogenic belt.Therefore

the thrusting in the foreland basin ge-nerated two sedimentary models for the Triassic sedimentary system in Block T of Tahe oilfield

with transportation directions being approximately perpendicular to and parallel with the orogenic belt

respectively.The sedimentary models are of guidance value for the exploration and development of the Triassic clastic reservoirs in the Tarim Basin.