Optimization Design of 3-D Seismic Observation System Based on Geophysical Forward Model

Dayi area in Sichuan basin is characterized by complicated subsurface structures.In the previous exploration,the seismic observation system was not effectively designed for the oil-enriched object area,leading to inconspicuous event set and fault points on the seismic profile and failing to understand structures.In order to clarify the occurrence,property and distribution of two major faults in this area,this paper presents the geophysical forward model of this area,conducts the seismic data acquisition demonstration and the optimization design/selection of the 3-D seismic observation system using ray tracing forward modeling and full wave field equation analysis and discusses the suitability of the data acquisition.The results show that the 3-D seismic observation system optimization design and selection can be able to greatly improve the quality of the seismic profile and the imaging accuracy of geologic bodies in this area.