Abstract:

The formation and evolution of Caledonian paleo-uplift in Sichuan Basin possessed long-term and complicacy.This resulted in different pool-forming stages of Sinian natural gas of the uplift.The early stage of pool-forming occured in Indo-Chinese Epoch;the late stage was in Himalayan Epoch.Each pool-forming stage could be divided into three types i.e.high entrapment with high resistance,high entrapment with low resistance and low entrapment.The main controlling factors of Sinian gas pools in Caledonian paleo-uplift are high sealling capability,high position of the structure;strong tectonic deformation and a close interconnection between the late-stage formed traps and the paleo-reservoirs.

Key words: Sinian, paleouplift, gas pool, pool-forming type, controlling factor, Sichuan Basin