The Paleozoic is the main exploration target in Tarim basin.An analyze on the distribtuion of the hydrocarbon carrier beds

unconformity surfaces

and conductive faults in the Paleozoic

shows that a good carrier system is formed in the platform-basin transitional area by the Ordovician carbonate carrier bed

Devonian sandstone bed

and the Caledonian and Hercynian unconformity surfaces and faults.The units of hydrocarbon migration and accumulation are also recognized on top of the Middle-Lower Ordovician for the main reservoiring period in the late Hercynian.Based on the spatial arrangement of the migration and accumulation units

the carrier system and the thermal evolution of effective source rocks

a comprehensive evaluation is carried out on the migration and accumulation efficiency of the units.It is further proposed that the Shaxi-Akekule swell

Taozhong I fault zone

and area surrounding well Taozhong-10 and Tazhong-1

be the future exploration targets in the platform-basin transitional area

and three areas

namely the two plunges of the central uplift

the Manxi area

and the northern Awati depression

be worth of much attention during the exploration.