Amplitude-preserving High-resolution Processing Method Of Seismic Data

With the continuous deepening of oil and gas exploration and the increasing demand for oil and gas resources,according to different oil and gas exploration areas,the existing oil and gas exploration methods and exploration results are used to find new favorable blocks and maximize the recognition accuracy of underground oil and gas information,for this kind of situation,it is necessary to explore to adapt to the exploration area of amplitude-preserving high resolution processing methods and process,provide in accordance with the deployment of exploration wells to improve the efficiency of exploration to meet the needs of fine exploration.In this paper,2D marine seismic data as the research object,and studies the methods of amplitude-preserving high-resolution processing of the data.Through a comprehensive analysis of the original seismic data,sorted out the characteristics and existing problems of the original data,and they are dealt with in a targeted manner,in the whole processing process,the processing concept of amplitude preservation and high resolution is embodied.In view of the various interference waves existing in the study area,targeted use of multi-domain,multi-method joint noise attenuation technology to eliminate interference waves in seismic data,which improves the signal-to-noise ratio of seismic data;SRME,predictive deconvolution and high-precision Radon transform are used to jointly suppress multiples,and through wavelet processing,the airgun wavelet is zero-phased while eliminating the influence of the bubble effect,the multiples are effectively suppressed,the continuity of the event axis in the superimposed section is better,and the structural artifacts related to the multiples are eliminated,the problem of notch in the frequency spectrum is solved,and the frequency band is effectively broadened,which improves the resolution of seismic data;The Kirchhoff integration method is used for pre-stack time migration,using cyclic velocity analysis method to establish accurate migration velocity field,optimizing the migration aperture and the migration inclination through experiments,and then accurately imaging the study area;Finally,the properties of Fourier scale transform is used for post-stack frequency extension processing to further improve the resolution of seismic data.In this paper,the research and application of amplitude-preserving and high-resolution processing methods for 2D marine seismic data are carried out,the final processing results have clear imaging,accurate structure,the event axis of the seismic profile has become relatively thin and the interlayer information is more abundant after the frequency extension processing,the frequency band is obviously broadened,and the reflected geological information is more abundant,which can provide a basis for subsequent fine structure interpretation and reservoir prediction.