行运算和二维数字滤波技术在钻孔电磁波层析成像中的应用

本文给出一种适用于现场实时处理的钻孔电磁波层析成像方法。该方法的特点是：（1）利用行运算（Row-Ation）技术，使得层析处理在仅有640K容量的DOS环境下也能运行自如；（2）反演过程中，采用直方图增强技术对灰度图进行后处理，提高信噪比和分辨率，改善了图像的质量。所设计的层析处理软件包在模型反演和野外实际资料处理中得到了比较满意的结果。

THE APPLICATION OF ROW ACTION AND TWO-DIMENSIONAL DIGITAL FILTERING TECHNIQUE TOBOREHOLE ELECTROMAGNETIC WAVETOMOGRAPHIC IMAGERY

Abstract A borehole electromagnetic wave tomographic imagery method suitable for on-the-spot immediate processing is presented in this paper. This method has some unique characteristics; ( 1 ) with the row-action (row operation) technique, the tomographic processing can be performed smoothly in the DOS environment with the capacity of merely 640 K; (2) in the process of inversion, the histogram enhancement technique is employed to make postprocessing of gray-scale map, thus raising the signal-to-noise ratio and resolution ratio and improving quality of maps. The software package designed for toinographic processing proves to be quite satisfactory in model inversion and field data-processing.