3—D叠前成像速度分析

“深度成像”是近年来使复杂的构造地震成像发生深刻变化最具决定意义的技术。与常规时间成像相比,深度成像明显的优点是揭示了盐下构造的形态和提高了成像的清晰度。本文将重温偏移成像的基本原理,并着重论述了一种用于层速度分析的稳健技术－用３－Ｄ叠前深度成像估算层速度和反射层位置。

Velocity Analysis by 3-D Prestack Imaging

The technology of most responsible for bringing about dramatic changes inseismic imaging of complex structures is termed "depth imaging" in recent years. Compared with conventional time image, the obvious advantages of depth imaging are that itreveals the subsalt structure and raise the clarity of imaging. This article will review basicprinciples and describe the usage of 3-D prestack depth imaging to estimate layer velocitesand reflecting horizon positions.