基于C语言的SEG-Y数据格式分析与转化

发布时间：2018-03-30 15:27

本文选题：SEG-Y　切入点：地震数据　出处：《地球物理学进展》2016年01期

【摘要】：在地震数据资料存储与交换中,SEG-Y数据格式应用最为广泛.然而,由于CPU架构之间的差异,同一个SEG-Y文件并不能在具有不同CPU架构的计算机上直接读取.为了实现在不同CPU架构的计算机之间进行地震数据共享,基于标准的SEG-Y数据格式和C语言可移植性强的特点,对SEG-Y数据格式的结构构成进行了分析,分别给出了不同结构部分详细的转化算法.最常用的两种地震数据存储格式是32位IBM和IEEE浮点数格式.在研究了这两种浮点数存储结构、表示范围、精度分析和转化差异的基础上,分别给出了两种相互转化的算法并比较了不同算法的转化效率.对比文献中给出的其他编程语言编写的SEG-Y数据某部分转化程序,给出了完整的SEG-Y数据格式转化的C语言代码.实现了SEG-Y数据在不同CPU架构的计算机中的正确读取、改写与存储.良好的可移植性保证了地震数据的共享与应用.
[Abstract]:The SEG-Y data format is most widely used in the storage and exchange of seismic data. However, due to the differences between CPU architectures, The same SEG-Y file can not be read directly on a computer with different CPU architecture. In order to share seismic data between computers with different CPU architecture, based on the characteristics of standard SEG-Y data format and strong portability of C language, The structure structure of SEG-Y data format is analyzed, and the transformation algorithms of different structures are given respectively. The two most commonly used seismic data storage formats are 32-bit IBM and IEEE floating point format. On the basis of expressing range, accuracy analysis and transformation difference, two kinds of mutual transformation algorithms are given and the conversion efficiency of different algorithms is compared, and some partial conversion programs of SEG-Y data written in other programming languages in the literature are compared. The complete C language code of SEG-Y data format transformation is given, and the correct reading, rewriting and storage of SEG-Y data in different CPU architectures are realized. The good portability ensures the sharing and application of seismic data.
【作者单位】：吉林大学地球探测科学与技术学院;国土资源部应用地球物理综合解释理论开放实验室—波动理论与成像技术实验室;
【基金】：十二五国家重大专项子课题(2011ZX05025-001-05) 国家自然科学基金项目(41274120)联合资助
【分类号】：P631.44

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