Abstract:

According to the conditions and principles of object occurrence and in association with the data of geology,geophysical exploration,geochemistry and testing,it is pro-posed that hydrocarbons in the Tarim Basin are preserved in condensate oil and gas fields(pools)mainly as condensate gas or condensate gas with light oil-rim or bottom oil.Un-der specific geological conditions of low geothermal temperature and great burial depth in threshold and peak of oil-gas generation,the primary migration was finished through mi-crofractures,and the secondary migration took the form of gas dissolved oil and free state oil.