The Silurian marine clastic reservoir in Tarim Basin is an important exploration play

in which some exploration breakthrough has been made in Central Tarim and North Tarim.However

no consensus has been reached about its sedimentary environment and characteristics

influencing future exploration.Based on the outcrop research and microscopic analysis of thin sections

this paper reveals that the Kepingtage Formation(Fm)in the Keping outcrop area can be divided into three third-order sequences.Large-scale fluvial-dominated delta deposits(mainly delta front and pro-delta deposits)are recognized in the Kepingtage Fm.Further more

several microfacies such as underwater distributary channel

inter-branch channel bay

mouth bar

distal bar and pro-delta mudstone are identified.The existence of large incised channel on the lower boundary of sequence indicates that large-scale deep water turbidite sandbody may develop in deep water.This delta deposits combination in the study area is of great significance for petroleum exploration in the Silurian marine clastic reservoirs in Tarim Basin.Favorable source rock conditions

large sandbody and multiple reservoir-source rock combinations are favorable for hydrocarbon accumulation.The turbidite sandbodies possibly developed in the deep water area are also the potential exploration targets.