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地面地震观测和测井的研究已有一段相当长的历史。它们在记录、处理和解释中都有着长足的进展。近来在利用地震讯号反演求得地层声阻抗的工作已有所进展,而某些重要的基础工作却早已在根据声阻抗制作合成记录的工作中加以完成。把它们各自发展作一下比较,可以见到实际上它们都是朝着使地面和地下观测资料能相互连结的方向上做了一些工作。这些资料之所以能相互连结是因为当测井是以深度为度量和地面观测是以时间为度量时,可以由地层速度做为连结的变量。而二种方法都是完全能把速度测定出来的。
Earthquake observation and logging have been a long history of research. They have made great strides in recording, processing and interpreting. Recent work on the inversion of the acoustic impedance of formations using seismic signals has progressed, and some important basic work has long been done in the synthesis of acoustic impedance. Comparing their respective developments, one can see that in practice they all do something in the direction that ground and subsurface observations can be linked to each other. The reason why these data can be linked to each other is that when logging is based on depth and ground observations are measured on time, strata velocity can be used as a link variable. The two methods are completely measured out of speed.