No consensus has been reached on the types of sandy conglomerate fans in the 4

th

-middle 3

rd

members of Shahejie Formation in Minfeng area.Based on observation and description of cores from 26 wells and in combination with seismic data

logging data

and grain size characteristics

this paper systematically studied the sedimentary characteristics of sandy conglomerate fans

including nearshore subaqueous fans

fan deltas and deep water turbidite fans in the 4

th

-middle 3

rd

members of Shahejie Formation in Minfeng area.Fan deltas dominate the bottom of the lower 4

th

member and middle 3

rd

member of Shahejie Formation

while the nearshore subaqueous fans are predominant in the middle to upper part of the lower 4

th

member

the upper 4

th

member and the lower 3

rd

member of Shahejie Formation.Deep water turbidite fans exist in each interval

but their scales are small.On the basis of identifying the types of sandy conglomerate fans in different intervals

we analyzed the synsedimentary tectonic activity

the geometry of boundary fault

paleoclimate

water depth and the close and open of lake basin

and determined the evolution and distribution characteristics of the main sedimentary facies in different periods. Based on these studies

this paper puts forward a sedimentary evolution model for the sandy conglomerate fans in the steep-slope zone of rifted lacustrine basin under the successive controls of the'high angle plate fault-high angle listric fault’

offering an appliccable instruction for oil and gas exploration in similar area.