Research of reservoiring in typical superimposed basins in China has made great progresses in recent years.In respect of basin formation:(1) Composite geophysical profiles reveal that the coupling of shallow and deep layers in Tarim basin and Tianshan orogenic belt is characterized by segmentation along strike.It appears as near E-W trending oblique extensional features to the east of Yangbulake

and near S-N trending extensional features vertical to the strike of strata.(2) The evolution of Tarim basin is characterized by tilting superimposition

i.e.from Cambrian to Quaternary

the depocenter migrated from the east to the west and finally to the periphery area.In respect of hydrocarbon generation:(1) Environmental indexes and basin types for development of good marine carbonate source rocks have been established.Source rocks with high abundance of organic matter have only been developed in rift valleys of passive continental margin

intra-cratonic down-warped basins

and frontal slopes and flexured foreland depressions in active continental margin.(2) The lower limit of organic matter abundance for effective carbonate source rocks has been determined to be 0.25%-0.30%.In respect of reservoiring:(1) Hydrocarbon inclusions in the Lower Paleozoic carbonate reservoirs in Lunnan area have been formed in Late Silurian-Early Devonian

Late Cretaceous and Neogene

respectively

and they are related with regional charging events of hydrocarbons.(2) Oil-source correlation shows that the oil in Lunnan and Tahe might have been sourced from the Middle-Upper Ordovician source rocks.(3) Isotope tracer study and temperature measurement of inclusions show that the fluids in Tazhong have deep source characteristics.Moreover

fluorite replaces limestone would have greatly improved the poroperm characteristics of the reservoirs. The discoveries in new series of strata and new type discoveries obtained in exploration of carbonates in Paleozoic craton area

as well as the breakthroughs got in exploration of Silurian and Devonian clastic rocks in Paleozoic craton area

show that Tarim basin has large exploration potentials.