Abstract: Gansu-Qinghai-Tibet petroliferous region is the largest sub- province of China with an area of about 269.5×10⁴km². In its nine subsiding belts, there are 32 petroliferous basins with an area of 159xI0* km2 in total. They are basins with long-term devolution and superimposed by petroliferous multi-formations of marine, continental-oceanic and continental facies of Mid-Upper Proterozoic, Paleozoic, Mesozoic and Cenozoic, shaping the geologic structural conditions of multistage non-biologic sources. Since the natural geographic conditions in this region are abnormal atrocious, the neo-tectonic movement is very active, its petroleum exploratory extent is still low and the effects for prospecting are unsatisfactory nowadays. This paper highlights the evaluation of hydrocarbon-bearning property from several aspects aiming at getting instructive dispute and thinking at home for further development of petroleum exploration cause in this region.

Key words: Gansu-Qinghai-Tibet petroliferous sub-province, structural division, oil-gas potential, super-basin, non-biologic source, oil-gas preservation, natural geographic condition