Abstract：Based on both geological and geophysical data, our research finds out that two fault systems with different structural origins were developed in the east part of Altyn Tagh piedmont. One of the fault systems is controlled by the Altyn Tagh strike-slip effect, and the other is controlled by the east Kunlun thrusting effect. The structural framework influenced by the faults in Pingdong, Edong, and Niubei is the uplift slope phase in the region. The difference of the evolution of each tectonic unit is obvious and the feature of hydrocarbon entrapment is different. The NNW discordogenic faults are gas source faults, which are active at the early stage. Their tectonic activity controls the formation of hydrocarbon accumulation belt. The type of oil and gas reservoir is decided by the type of the tectonic unit. Late Yanshanian movement controls the direction of oil and gas migration in a long period, which indicates the enrichment layer series.
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