三维叠加次数——偏移的神秘助推力

• 作 者: J.P.Lindsey 刘勇 杨振平
• 机 构: 石油地球物理勘探局物探地质研究院,
• 出 处: 国外油气勘探
• 发表日期: 1997年03期
• 关键词: 叠加次数 三维地震勘探 三维偏移 地震数据 三维数据体 三维 叠加 叠加剖面 偏移叠加 同相轴

偏移能极大地改进叠加数据的质量,这是现代三维数据处理所公认的事实。但如何确切地改进质量并使之量化,我们知之甚少。本文的目的就是用一个简单明了的原理和一组公式,使非处理专业的解释人员对处理技术有个深入的了解。怎样做三维偏移众所周知,偏移的目的是把同相轴从叠加剖面上出现的位置移回到它们原来实际的位置。这样做的原理是什么? 为了了解这点,我们想像三维数据体中一个地下绕射点的响应。在记录面的某个点,绕射

Offset can greatly improve the quality of the overlay data, which is the accepted fact of modern three-dimensional data processing. But we know little about how to improve and quantify quality precisely. The purpose of this article is to have a straightforward understanding of processing techniques by using a simple and straightforward principle and a set of formulas. What to do with 3D Offsets It is well known that the purpose of migration is to move the events from where they appear on the stacked profile back to their original actual position. What is the rationale for doing this? To understand this, let’s imagine the response of a subsurface diffraction point in a 3D data volume. Diffraction at some point on the recording surface