Multiple Suppression And Application Research Of Seismic Data In Bohai Sea Area

Multiple is one of the main interference waves in seismic exploration.The existence of multiple will bring many problems to the processing of seismic data.If there is a deviation in the processing of the multiple,it will affect the correctness of the subsequent interpretation of seismic data,and the reliability of seismic data will be greatly affected.Therefore,the suppression of multiple is very important in the processing of seismic data.In the exploration of marine seismic data,because both the ocean and the seabed are strong wave impedance interfaces,the interference of multiple is particularly obvious in the marine seismic data.The suppression of multiple has become an important work in the processing of marine seismic data and one of the difficulties in seismic data processing.This article first introduces the formation mechanism of multiple,the characteristics of multiple and the recognition of multiple etc.,then the suppression technology of typical multiple in marine seismic data is systematically studied from the aspects of method principle,theoretical basis and applicable conditions,such as shallow water multiple suppression,predictive deconvolution,high-precision Radon transform,formed a residual multiples attenuation method.At the same time,the different suppression methods are compared,and the advantages and disadvantages between different types of multiple,should adopt different methods of suppressing attenuation,applying different combinations of multiple attenuation method,play the advantages of each method,to guarantee the truthfulness of the information,based on the maximum to suppress multiple,to improve the signal-to-noise ratio of the process data.Bohai sea is China's largest offshore oil and gas fields,but also the most exploration and development potential of rich oil and gas basin.At present,the requirements for seismic data processing in Bohai sea area are becoming higher and higher.How to suppress the multiple in this area better and make the seismic data imaging more accurate is the focus of seismic data processing in this area.Combined with the actual seismic data of Bohai sea,this paper summarizes the types and characteristics of multiple in Bohai sea area,and puts forward a set of multiple combination suppression technology and process suitable for Bohai sea area,obtain a satisfactory result.