Abstract: The surface condition of Keshen area,Tarim Basin is very rough,besides,the subsurface structure of it is very complicated too,causing a lot of difficulties in data collection.In light of the low signal to noise ratio and inaccuracy of imaging,a stack depth migration treatment on the existing data is made at first,then the array length,receiving lines,guns density and other basic observation parameters are acquired.Based on the above parameters,the geophysical model of this area is constructed and the illumination of the target stratum is calculated too.According to the Common Reflection Point(CRP) energy homogeneous principle and maximum receiving efficiency,geophone distance,receiving lines and guns density are optimized.The research results are instructive to improve the quality of seismic data acquisition in complex mountainous area.

Key words: Tarim Basin, seismic data acquisition, observation system, illumination, energy coverage, reflected energy, common reflection point