摘要
从矢量波动理论出发,导出了二维弹性波逆时传播的高阶差分格式,实现了弹性波在数值空间中的逆时延拓。采用逆时格式差分求解程函方程,得到网格空间中各点的直达波旅行时,以此作为弹性波逆时偏移的成像条件,实现了二维多波多分量资料的叠前逆时深度偏移。数值试验得到了满意结果。
Based on vectorial seismic theor y, a high-order finite difference scheme fo r 2D isotropic media is derived in the paper which can achieve reverse-time extrapolat ion of elastic waves. An upwind finite-diff erence scheme of eikonal equation along exp anding wavefronts is developed which can ca lculate imaging condition of reverse-time migration. Using these two techniques the a uthor implements the reverse-time migratio n of 2D isotropic media in the paper, and th e synthetic data test of this method produc es good images.
出处
《中国煤田地质》
2002年第4期62-63,69,共3页
Coal Geology of China
关键词
矢量波场
逆时偏移
成像条件
地震勘探
弹性波
multicomponent seismic explorat ion
vectorial wave field
reverse-time mi gration
imaging condition220Hz), and hei
