Research On Non-standard Original Seismic Data Transformation Methods

Non-standard original seismic data is a new seismic data storage format, which is appeared in recent years. This data is different from SEG association standard. The current processing system and de-coding software can't identify and access, which brings significant difficulty to seismic data process. The paper aims to analyze the structure of non-standard original seismic data, to design new transformation methods, to resolve producing application problem of non-standard original seismic data. The paper includes the following:Two important industry standard,《SEG-D Rev 1,SEG Field Tape Standards》,《SEG-D Rev 2,SEG Field Tape Standards》,was analyzed. The format structure and storage mechanism of SEG-D field original seismic data ware analyzed in detail. Combined with data storage mechanism, we analyzed the inter-code format of SEG-D field original seismic data.We summarized the current four format form the non-standard original seismic data. Aiming at the special condition of the data from Kazakhstan, this paper also analyzed the data structure, inter-code form and storage manner of the non-standard SEG-D field original seismic data. Through the comparison between the non-standard and the standard original seismic data,the difference between the non-standard original seismic data and the SEG association standard was got.Several key methods, such as format identification, data addressing method, header storage method and digital transformation method associated with non-standard original seismic data transformation process, were provided. These key methods were used in the transformation software developing process about the non-standard original seismic data, and the theory research and the software developing was combined together.The non-standard original seismic data of Kazakhstan was used in the data processing. In the final section, it can be see clearly the unconformity contact relation, and the salt base was imaged better, the boundary the salt dome clear. Compared with the old section or the insite processing section, the new section improved in SN ration, continuity and image quality. Through the research, the non-standard original seismic data can be used in seismic data processing succefully, and reached the research goal.