Application Research of 3D Observation System Optimization Technology Based on Prestack Migration Imaging in East Sichuan

Sichuan Basin is one of the basins with the richest natural gas resources in China and has the most potential for exploration and development. However, in the high, steep and complex structural areas of East Sichuan, the signal to noise ratio of seismic data is low and the imaging effect is poor, so many rounds of seismic research are still unable to achieve substantive breakthroughs. This paper focuses on the scheme design of 3D observation system in high and steep complex structural areas, carries out full wave field forward modeling of the constructed 3D geological model, and finally obtains seismic data records for different field observation system parameters. Then we perform prestack depth migration imaging processing, analyze and evaluate the impact of the observation system on the imaging effect of 3D forward data and the layer attributes, and obtain the better 3D observation system scheme with technical and economic integration, which has been confirmed in the parameter post-evaluation of the actual data and provides support for the subsequent 3D seismic exploration acquisition technology design in East Sichuan area.