Study And Analysis On High Precision 3D Seismic Noise Control In SUBEI Basin

Subei Basin is located in the east of China's high-speed development district,its surface environment is complex,noise disturbance is very serious.Due to the characteristics of "broken" in Subei Basin,the high resolution and quality of seismic data are required,and the deployment of high-precision 3D seismic acquisition is often given great expectations to improve the data signal-to-noise ratio and resolution,and it is hoped that the more clear geological structure and smaller reservoir traps can be characterized by high precision 3D seismic acquisition.Based on the summary of the high precision three-dimensional seismic collection construction in Subei Basin and the suppression measures of seismic data processing,this paper realizes the main interfering factors affecting the quality of high precision seismic data in the region,analyzes the characteristics of various kinds of noise,sums up the targeted suppression methods and the techniques adopted.In this paper,the high precision 3D seismic acquisition interference suppression method in Subei basin is expounded in two aspects.The first is the interference suppression in the construction process,including the optimization design of the geometry system,the combination of geophone and the embedding,the stimulation well depth and the dosage selection under the special surface condition,the application of the multi well combination excitation in the near surface igneous rock region is demonstrated.The experience and measures of interference control in high precision three-dimensional acquisition construction in Subei Basin are summarized.The high quality seismic data can be obtained by interference suppression during the field construction,which lays the foundation for the post-processing.Secondly,this paper expounds the technology and method of interference suppression in Prestack processing,and analyzes and studies it from two aspects of denoising technology and effective signal enhancement technology.In this paper,the main rule interference and irregular interference in Subei Basin are summarized,and the principle and method of radon-time frequency filter suppressing random noise,cross arranging and suppressing linear interference and several times are analyzed.The effective signal enhancement part introduced the static correction,the deconvolution,the velocity analysis,the residual static correction,the superposition and so on the technology,has analyzed its in enhances the seismic data quality aspect the function.At the same time,this paper sums up the general processing flow of high precision three-dimensional adopted in Subei basin.This paper analyzes and deals with the typical high-precision 3D seismic acquisition parameters and seismic data in Subei Basin,analyzes the effect of interference control in construction process and the application of interference suppression technology in the high-precision three-dimensional acquisition of Subei Basin,and proves the feasibility and effectiveness of this series of interference suppression measures.