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本文提供的实例研究表明,高频井间数据中能找到反射波。采用与VSP数据相似的处理流程可增强反射波能量,以便进行高分辨率成像。对几百英尺深的井来说垂直分辨率有可能达到3～5英尺(1～1.5米)。尽管本研究得到的井间反射图像与声测井曲线很吻合,但我们发现,随着成像的反射点与激发井之间的距离的增加,图像的信噪比都在下降。此外,噪声的主要成分是假频管波及横波和转换波。我们也观测
The case study provided in this paper shows that reflected waves can be found in high frequency crosswell data. Using a process similar to VSP data can enhance the reflected wave energy for high-resolution imaging. Vertical resolution may reach 3 to 5 feet (1 to 1.5 meters) for wells hundreds of feet deep. Although the cross-well reflection image obtained in this study is in good agreement with the acoustic well curve, we found that the signal-to-noise ratio of the image is decreasing as the distance between the reflection point of the image and the excitation well increases. In addition, the main component of noise is the overtone waves that propagate transverse waves and converted waves. We also observe