井间衍射层析成像的模拟和实验研究

THE SIMULATION AND EXPERIMENTAL STUDY OF CROSS-HOLE DIFFRACTION TOMOGRAPHY

地球物理衍射成像是近年来发展起来的一种波形及演技术，由于它利用波形资料中所包含的介质动力学特征的大量信息，因此，可达到的分辨率显著地优越于射线方法．但是它离实际应用还有距离．本文针对实际应用中遇到的问题进行了模拟研究，比较了Ｂｏｒｎ近似和Ｒｙｔｏｒ近似的抗干扰能力，并成功地进行了实验室的实测试验．

Geophysical diffraction tomography is a waveform inversion technique developed recently.Because it used large information of the dynamics character of medium included with in waveform, the diffraction tomography showed better resolution than ray method. But we still have a long way to go to the application.In this paper,we simulated many problems which may meet in the geophysical application and compared the anti-noise ablity of Born approximation with that of Rytor approximation. Finally,we made a experiment of diffraction tomography in lab successfully.