Abstract: The signal-to-noise of seismic data is relatively low for complex mountanious region in Qaidam Basin affected by complicated surfa ce condition and underground structure, as result of that, this region is bla nk of seismic explora tion or seismic data, directly influencing on the exploration potentia l eva lua tion and fa vorable ta rgets selection. With the continuously expanding of seismic exploration in the basin, it is carried out to tackle key problem of mountainous seismic technology, ba sed on the old data analysis a nd exploration experience,through implementing a series of measures including observation system design aimed at the ta rget,fine investigation for surface structure,sampled pa rameters test , well depth design by selecting rock and bed a nd other acquisition techniques, a series of more ma ture exploration technique suited for complex mountainous region ha s been developed a nd the break through has been made in quality of data acquired field, providing the strong technique support for petroleum exploration in complex mountainous region.

Key words: complex seismic geological condition;observation system;static correction, acquisition technique;wide line acquisition technique in mountainous region;Qaidam Basin