Study On Seismic Acquisition Technology In Xining Basin

Xining basin is located in the northeastern part of Qinghai Province,west of the Riyue Mountain,east of Gansu province,south to the north of the Laji Mountain as the boundary,north to the southern edge of the Daban Mountain.The area is complex and the surface is covered with thick loess layer,and the excitation conditions are poor.On the ground there are railways,highways,factories and other large obstacles leading to interference wave development.The speed of loess layer is low,the lateral thickness changes greatly,and the static correction problems are prominent.Seismic exploration is more difficult,has not yet carried out seismic exploration work.In this paper,the general situation of the study area,the geologic conditions of the study area are analyzed in detail,and the seismic exploration data of the Minhe basin similar to the geologic conditions in the area are studied.The key points and difficulties of the seismic exploration work in this area are analyzed.The Then,according to the actual situation of Xining basin and the high-density and wide-line seismic acquisition technology developed in recent years,and carried out detailed excitation parameters test comparison,receiver parameter analysis and geometry parameter demonstration,and proposed a set of seismic acquisition technology suitable for the region.This technique takes the high-density and wide-line geometry as the core,and adopts the multi-shallow well combination excitation,the appropriate combination receives.The tomostatics technique based on the surface investigation constraint is used to solve the static correction problem in the region,and the application effect is achieved.Finally,the application effect of the seismic acquisition technology in Xining Basin is demonstrated.Through the research and application of this project,a high quality seismic section is obtained in the Xining Basin,which fills the gap ofseismic exploration in this area and lays the foundation for the seismic exploration work in this area.