地震数据访问技术研究

地震数据是勘探与开发研究工作中一类重要的数据,其格式复杂、数据体庞大,所以地震数据的访问成为地球物理软件开发中的技术难点之一。通过分析常用地震数据的格式,明确了地震数据访问要解决的关键技术问题是地震道在文件中的随机定位。通过对现有勘探应用软件采用的地震数据访问技术进行总结,指出了各种方法的优缺点。在此基础上提出了一种微机上通过直接读取SEG-Y文件实现对地震数据访问的新方法,这种方法综合了现有地震数据访问技术的优点,直接读取原始的地震数据,无需进行数据格式的转换,在数据访问的效率上可以满足用户实时处理的要求。应用这种新方法,开发了胜利探区地震数据管理系统、基于高阶统计量的相干等软件,取得了很好的应用效果。

RESEARCH OF THE SEISMIC DATA ACCESS TECHNOLOGY

Seismic data are important in the research of exploration and development. Because the format is complex and the data body is enormous,seismic data access becomes one of the problems in geophysical software development. Through analyzing the format of common seismic data, it is definite that the key technical problem is the random location of the seismic trace in a file. The existing seismic data access techniques adopted in exploration application softwares are summarized in this paper, andmerits and faults of different kinds of methods are pointed as well. A new method is put forward to access seismic data through directly reading SEG-Y file from a microcomputer. This method combines the advantages of the exiting seismic data access techniques. Original seismic data can be read directly without transformation of the format. It can meet the need of users in real time processing. It has been used in developing the seismic data supervisory system in Shengli prospected areas and a software to measure coherence based on high order statistics. It has obtained satisfying application effect.