地震叠前时间偏移处理方法应用研究-地球探测与信息技术专业论文.docxVIP

万方数据 万方数据 Abstract Migration isone of the important processing means of seismic exploration,and its purpose is to make underground reflection wave events homeaccurately. As the exploration structure becoming more and more complex, exploration accuracy requirements are also increasing. But theconventional post-stack migration processing can not meet the requirements for imaging. The pre-stack time migration processing technology has achieved better results in the migration imaging and with the rapid development of computer, the technology has been widely used. First of all, the paper systematically reviews the concept, basic principle, classification and development process of migration, focusing on the analysis of the concepts and principles of pre-stack time migration and post-stack time migration.Thus lay a solid theoretical foundation for subsequent analysis model testing. Secondly this paper brieflyintroduce the basic concepts and main module of the core processing software (CGG processing software). According to the characteristics of the geological structure, by constructing the corresponding geological model, the simulation calculation of the seismic record forward and using the CGG processing software for processing analysis. Systematically analyze the pre-stack time migration parameter selection, the establishment of the velocity field and the key technologies of software.Summed up that the pre-stack time migration has the effect of improving the seismic data imaging of the steep dip region, enhancing the quality of seismic data processing, accurately ascertain the complex structure of the underground. Finally, do the analysis of pre-stack time migration and conventional migration to the 2D seismic data. Coming to the fact that relative to the conventional post-stack migration, the pre- stack time migration technology has special advantages and more extensive application prospects. Pre-stack time migration avoid the limitation of over-simplistic medium mode