The Formation Mechanism and the Suppression Technology Study of Multiple Wave of the South Yellow Sea Seismic Date

摘要

comprehensive analysis of advantages and disadvantages of current multiplesuppression technology at home and abroad and the limitations of these technologieson repression of multiple waves of the waters, we proposed to suppress multiplereflections by using high-precision τ-R transformation technology proposed by LiQingzhong Fellow Through the processing of theoretical analog records and theactual data, there was a good result on the repression of multiple waves of strongreflecting interface and interbed multiple waves. It has its own unique especially forthe repression of interbed multiple waves. 4. Form a reasonable technical program to suppress the complex multiple waveof the South Yellow Sea seismic data. Against the particularity that there are various multiple waves the complex wavefield characteristics on seismic data of the sea.Through comprehensive study，weformed a reasonable technical solution to suppress the complex multiple wave of theSouth Yellow Sea seismic data: on the basic of thereasonable suppression of avariety of noise, first use the free surface multiple suppression techniques (SRME)with deconvolution to attenuate the free surface multiple reflections, and then usecurvelet transform technique towave and convertedmultiple waves, followed by using high-precisionτ-R transform technique tosuppress whole and interbed multiple reflections onstrong reflection interface.After avariety of multiples to be suppressed, the velocityanalysis precision was improved,and then use deletion fitting stacking technique to replace conventional stackingtechnique after normal moveout correction to further suppress the residual multiplereflections and to acquire high-quality processing profile. The improvement of many kinds of processing technology above and theformation of a reasonable technology system and program to suppress the complexmultiple wave of South Yellow Sea seismic data can effectively suppress the multiplereflections in the waters. After reasonably suppressing the multiple reflections,provide protection for obtaining high-quality seismic profiles and Iay a solidfoundation for the follow-up study of the geological features of the South Yellow Sea.

目录

英文文摘

0 Introduction

0.1 Source project

0.2 Project Foundation and Significance

0.3 Present Situation of Research Home and Abroad

0.3.1 Present situation of research abroad

0.3.2 Domestic Research Status

0.4 The main research content and technique course

0.4.1 The main research Content

0.4.2 Technique Course

0.5 Chief innovations

1 The geological and geophysical characteristics of the South Yellow Sea Basin

1.1 The South Yellow Sea Basin regional geological features

1.1.1 Regional structure background of the South Yellow Sea Basin

1.1.2 Structure division of the South Yellow Sea

1.1.3 The South Yellow Sea Basin evolution

1.2 Seismic geological conditions of the South Yellow Sea

1.2.1 The topography,geomorphology and climatic conditions of the South Yellow Sea Basin

1.2.2 Rock geophysical features of the South Yellow Basin

1.3 Seismic highlight and difficulty of the South Yellow Sea

1.3.1 Seismic highlight

1.3.2 Exploration difficulty

1.4 A typical record of South Yellow Sea Basin seismic data

1.5 Chapter summary

2 Seismic data multiple wave forming mechanism of South Yellow Sea

2.1 The formation mechanism of multiple wave

2.1.1 Wave field communication theory

2.1.2 Multiple wave types and formation mechanism of marine seismic exploration

2.2 Forward simulation of the South Yellow Sea,the formation mechanism of multiple wave seismic data

2.2.1 The establishment of the geological model

2.2.2 Acoustic wave equation simulation records study of multiple wave formation mechanism

2.2.3 The study of multiple wave's formation mechanism with the simulation records of elastic wave equation

2.2.4 The multiples spectrum characteristics

2.3 Multiple features of the seismic data of the South Yellow Sea

2.4 The formation mechanism of multiple wave of the South Yellow Sea seismic data

2.5 Chapter Summary

3 Typical multiple wave suppression technology research

3.1 τ-p transformation of Multiple wave attenuation technology

3.2 Parabolic Radon transform

3.2.1 The principle of parabolic Radon transform

3.2.2 High-resolution parabolic Radon transform

3.3 Beamforming Method

3.3.1 Minimum variance unbiased Beamforming Theory

3.3.2 Generalized elimination sidelobe beamforming theory

3.4 Free interface prediction and suppression of multiple wave

3.4.1 Wave equation based on the principle of suppression of multiple wave

3.4.2 SRME method to suppress the problems of multiple waves

3.5 Chapter Summary

4 The multiple wave suppression technology study of the South Yellow Sea seismic data

4.1 Curvelet transform multiple suppression techniques

4.1.1 Curvelet wave and Curvelet Transform

4.1.2 Multiple suppression based on Curvelet Transform

4.2 High-precision τ-R transform multiple suppression techniques

4.3 Research in suppressing multiple wave in simulation records

4.4 The multiple suppression processing research of actual records

4.4.1 The analysis of the noise characteristics of the South Yellow Sea seismic data

4.4.2 The strong noise suppression before the multiple-wave suppression

4.4.3 The multiple suppression process of actual records

4.5 Chapter summary

5 Conclusions and recommendations

5.1 Conclusion

5.2 Recommendations

Reference

Acknowledgement

Resume

Translations Published academic papers