井中地震CT观测系统研究

Improving the Observation System for Borehole Seismic Computed Tomography (CT)

井中地震CT具有高精度、高分辨率、接近探测目标等优点,在各类工程中得到较多应用。在震源确定情况下,地震数据的质量主要取决于观测系统的合理设计。本文通过理论模型正演得到相应的观测数据并进行CT成像反演,阐述了观测系统中射线角度、射线密度等因素对CT成像结果的影响。将研究成果应用于工程实际,取得满意效果。

Borehole seismic computed tomography（CT） has been widely applied in a variety of engineering projects;its advantages include accuracy,high resolution,and ease of use.The quality of seismic data depends mainly on the appropriate design of the observation system and the choice of seismic source.This paper,using the corresponding observing data from the forward simulating seismic wave propagation in theoretical model and in which carrying on the CT imaging inversion,discusses how to enhance the tomography by changing the ray angle and ray density of the observation system.The modified observation system developed in this study has been successfully applied in subsequent engineering projects.