The Research Of Multi-format Seismic Data Access And Conversion Technology

In recent years, with the constant innovation of oil exploration technology, the acquired seismic data volume is more and more huge. In order to improve the efficiency of seismic data access, it puts forward various methods to improve the efficiency of seismic data access in the development of seismic data processing platform.At the same time, the exploration equipment constantly updating leads to the change of the seismic data format, variant format and custom format emerging in endlessly. Therefore, it costs lots of time in the different formats of seismic data conversion.For the purpose of improving the efficiency of data access, the interior of many processing systems define the special format, while improving the system internal access efficiency. But it needs internal and external data format conversion, not achieving the unification of the data format. How to solve the contradiction between generality and efficiency of data access is one of the most important problems, which needs to be solved in the design of seismic data processing system.According to the above problem, the main tasks of this thesis study the reading and writing and the format structure of the seismic data, besides, it builds the MSFDM to implement the reading and writing operation and conversion. In additions, it reduces the amount of programming for developers. On the basis of implementing the MSFDM, it improves the data access efficiency and reduces the cost, meanwhile, it solves the contradiction between generality and efficiency of data access.In this thesis, the specific research objectives are as follows:Firstly, it designs the MSFDM. The different seismic data format has different data structures.It analyses the actual usage and features then abstracts the seismic data structure, it builds the MSFDM which is independent of the format. The MSFDM is composed of three parts, the BIES, the THES and the TGES. On the basis of MSFDM, it implements the access of multi-format seismic data, and by establishing the index of file description information, it preliminarily enhanced the efficiency of seismic data access.Secondly, it designs the MSDSM. By establishing MSDSM to achieve the effective access of the multi-format seismic data, the gather as the basic unit of seismic data is broken down into some seismic data blocks which are assigned to multiple nodes to make the data storage more efficient. Which is based on distributed storage, it designs the hierarchy index, data access and partitioning strategy to implement the high efficient access of multi-format seismic data.Thirdly, it implements multi-format seismic data access interface, loading and conversion module on the basis of the MSDSM and MSFDM. Access interface can implement access operation of multi-format seismic data, loading module implements establishment of the MSDSM and MSFDM, conversion module implements conversion among multi-format seismic data.From the above, through the establishment of the MSFDM and MSDSM, it solves the problem of no unified format and inefficiency in seismic data processing system.At last, it designs the example application to verify and prove the feasibility and effectiveness of this thesis.