Sublacustrine fans were identified firstly in the Junggar Basin through integrated methodology of geology and geophysics.Data gathered from core sampling

testing

logging

and 3D seismic analysis of the Wuba block in Karamay Oilfield of Juggar Basin

show that the fans develop well in the lower Urho Formation of the Permian in the area.Study on the sedimentary facies

petrology and texture reveals that the fans have Bouma sequence and grain size distribution typical of turbidite deposits.Forward seismic modeling confirms the sensitive responses of the fans.The spatial distribution of fans was finely described with several seismic technologies including seismic multi-attributes

spectrum decomposition and seismic slices.The sandbodies in the fans occur as chaotic reflection

oblique reflection and lenticular reflection on seismic profiles.On plane view

they are widely distributed in clusters with good sandstone and mudstone combinations

while in space

they show lens shapes.These sandstone reservoirs and source rocks are close and in good combination

favorable for forming litholohic traps.These fans bear great significance to the exploration of lithologic reservoirs in the region.