陡倾角单斜地层地震勘探观测系统设计及其应用OA

The coal resources with the dip angle of greater than 30 degrees in the western region of China are quite consider-able.In order to improve the quality of seismic exploration and acquisition data in steep dip coal fields,we study and analyze the time-distance curve characteristics of seismic reflection waves in inclined strata,and establish a steep dip monoclinic ge-ological model to design three different observation systems(midpoint shooting,lower-dip direction shooting,upper-dip direc-tion receiving,and upper-dip direction shooting,lower-dip direction receiving).At the same time,the ray tracing method is used for seismic wave field forward simulation.By comparing and analyzing the seismic wave field and superposition time profile characteristics for three different observation systems,a design method suitable for seismic exploration observation systems in steep dip monoclinic strata is summarized.The design method of seismic exploration observation system suitable for steep inclined strata has been applied to practical seismic exploration data acquisition work,achieving ideal seismic data.