Study On Static Correction Method In Nanchuan Area

Nanchuan area is is located in the transition zone between the southeastern edge of Sichuan Basin and Yunnan Guizhou Plateau.The topography is complex and the static correction problem is very prominent.Because the static correction problem can not be well solved,seismic data can not be well imaged,resulting in imaging errors or structural artifacts.Therefore,the static correction method is systematically studied in this paper,and a set of matching static correction method technology suitable for Nanchuan area is established,and good application effect is achieved.Based on the investigation and analysis of the acquisition parameters and data characteristics in the study area,the static correction method of complex surface in the study area is studied.First of all,according to the characteristics of the data,determine the research difficulties;then for the research difficulties,formulate countermeasures to solve the static correction problem in Nanchuan area;finally,the implementation of the research countermeasures.It is a very complicated process to solve the static correction problem of complex surface.The complexity of the surface is often closely related to low signal-to-noise ratio,inconsistency and complex and changeable structural structure.Therefore,it is necessary to carefully study and control the data processing links in the research process.In the research process,in view of the correlation factors of complex surface,the key steps in the research process are emphatically studied and analyzed: single channel multi domain denoising,field static correction method,tomographic static correction method,surface consistent residual static correction method,layered residual static correction method,data consistency processing method,comprehensive velocity analysis method and CDP gather fine resection method and other key steps were tested and verified.By selecting reasonable parameters,ideal static correction effect is achieved.Through the actual data research and verification,the research method has achieved good results in Nanchuan area,and formed a set of methods and technology and processing flow for complex surface static correction in Nanchuan area.