1.Research Institute of Hainan Branch,CNOOC,Haikou;2.School of Geophysics and Information Method,China University of Geosciences Beijing,Beijing
In order to solve the problems of low resolution seismic data and complex sand body distribution and overlapping relationship in Yingqiong Basin, a complete data processing process including preprocessing, denoising, migration and bias post-processing is designed based on the original data of three years. In post processing, compressed sensing frequency lifting method was applied to pre-stack depth migration profile, and compared with blue filtering frequency lifting method and zero phase deconvolution frequency lifting method. The advantages of compressed sensing frequency lifting method were demonstrated, and the application of compressed sensing frequency lifting method to solve current geological problems proved its rationality in the subsequent development and implementation of the Yingqiong Basin. The results show that compared with the other two frequency lifting methods, compressed sensing frequency lifting method can protect the reliable low frequency information below the main frequency, expand the high frequency, and improve the data resolution. By comparing the waveform inversion results before and after compressed sensing frequency lifting, the superimposed characteristics of sand bodies can be revealed, and it is also helpful for the subsequent inversion work. As a new seismic data processing method, compressed sensing frequency lifting method can better solve the problems of low seismic data resolution, sand body distribution and complex overlapping relationship, and it is worth popularizing and applying in practical seismic data processing.