地震勘探中的时间-暴光声学

摘要

An analysis of a passive seismic method for subsurface imaging is presented in which ambient seismic noise is employed as the source of illumination of subsurface scatterers. The imaging algorithm can incorporate new data into the image in a recursive fashion which causes image background noise to diminish over time. Under the assumption of spatially-incoherent ambient noise, an analytical expression for the point-spread function of the imaging algorithm is derived. The point-spread function (PSF) characterizes the resolution of the image, which is a function of the receiving array length and the ambient bandwidth.%本文提出用于地下成像无源地震方法的分析,在该方法中应用环境地震噪声作为地下散射体的照明源.该成像算法能够以递归方式将新的数据融入到成像中,这使成像背景噪声随时间减少.在空间域不相干环境背景噪声的假设前提下推导出成像算法的点-扩展函数.点-扩展函数表征成像的分辨率,即接收排列长度和环境带宽的函数.