地震纸剖面数字化方法与应用

Method for digitalization of seismic paper profile and application.

目前 ,国内各油田保存有大量的旧地震纸剖面或磁带 ,而没有建立叠后地震资料数据库 ,因此无法充分发挥以往老地震资料的作用。本文利用图像处理技术 ,通过对旧的地震纸剖面进行扫描获得光栅图像 ,经二值化、几何校正、时间轴消除、地震波形的搜索和提取等数字化处理后 ,转换成矢量数据 ,然后将这些数据转成标准的SEG Y格式数据 ,即可按现代地震数据处理技术做进一步的处理和解释。通过对以往地震纸剖面的数字化处理可以看出 ,获得的数字化地震记录能够恢复旧地震纸剖面的原貌 ,效果比较理想 ,为进一步处理和解释以往未建叠后地震资料数据库的地震资料提供了一条可行的途径。由于以往老地震资料均未做振幅保真处理 。

At present,the oilfields at home preserved a plenty of seismic paper profile and tape and did not build poststack seismic database,so that can not fully play the role of former legacy data.Using image processing technique,the paper got grating image after scanning the seismic paper profile,that has been transformed into vector data after digital processing,such as binary number representation,geometric correction,removing time axis and seismic waveform searching and detecting,and then these data were transformed into standard SEG Y format,the further processing and interpretation can be carried out according to present seismic data processing techniques.It can be seen from digital processing of former seismic paper profile that the resulted digital seismic data can restore original face of old seismic paper profile,having ideal effects and providing a feasible way for further processing and interpretation of seismic data that have not been built up the poststack seismic database.Because the legacy data have not been carried out the amplitude hi fi processing,so post digital processed seismic data only can be suitable for geologic structural interpretation.