CHARACTERISTICS OF CLASTIC RESERVOIRS IN THE TARIM BASIN

This paper deals with the characteristics of petrology,genetic type and distribution of sand bodies,diagenesis and diagentic evolution,genetic type of porosity and reservoir property of Silurian-Tertiary clastic reservoirs in the Tarim Basin.It was considered that Suweiyi Formation (Miocene),Upper Cretaceous,Lower Tertiary,Upper to Middle Triassic and Donghe Sandstone (D_3d) in Northern Tarim Basin,Donghe Sandstone in Central Tarim Basin,and Miocene,Lower Cretaceous in Southwestern Tarim Basin were the best reservoirs,and giant to middle oil and gas fields could be formed in those reservoirs.It was also pointed out that the deep buried reservoirs such as Triassic and Donghe sandstones with favorable reservoir property were rare in the world.Their formation conditions were analysed in detail.