Petroleum System and Prospecting Targets in Northern Margin of Qaidam Basin

Based on the structural evolution and geological framework in northern margin rift of Qaidam basin, this paper presents that the overall course of faults development in middle Qaidam is the main power for controlling the superimposition and assemblage of Mesozoic and Cenozoic basins, the deep sedimentary structure of Mesozoic and the reverse structures during Himalayan movement in this rift, and illustrates that the petroleum system in it is characterized by side-by-side pattern in space and by continuous pattern in time. Furthermore, some countermeasures and suggestions are made, which are of significance for exploration of the rift-like reservoirs in this area.