基于正演模拟的横向变速介质叠加速度误差分析

英文篇名：Analysis on Stack Velocity Error of Lateral Variable Medium Based on Forward Simulation
中文刊名：石油天然气学报
英文刊名：Journal of Oil and Gas Technology
作者：汪勇
英文作者：WANG Yong (College of Geophysics and Geomatics ; China University of Geosciences ; Wuhan 430074 ; Hubei ; China ; College of Computer Sciences ; Yangtze University ; Jingzhou 434023 ; Hubei ; China)
中文关键词：横向变速介质 ; 叠加速度 ; 误差 ; 正演模拟
英文关键词：lateral variable medium ; stack velocity ; error ; forward simulation
出版日期：2008-12-15
机构：中国地质大学(武汉)地球物理与空间信息学院;长江大学计算机科学学院;
年：2008
期：06
出版单位：石油天然气学报

摘要

速度是地震勘探中最重要的参数之一,直接关系到叠加和偏移的质量。在常规的速度分析过程中,为了使CMP道集中的反射同相轴对的最齐而提取的叠加速度,是将地层假设成均匀介质,这在地层复杂地区会引起较大的误差。首先阐述了横向变速介质中叠加速度产生误差的原因,然后对天山南缘地区实际过井剖面进行波动方程正演模拟,分析了叠加速度误差产生的原因和大小,并探讨了消除误差的方法,为变速成图提供了更可靠的速度场。
Velocity was one of the important parameters in seismic exploration, it was directly related to the quality of super position and offset, by which high errors were caused in complicated seismic areas. The reason of stack velocity errors in lateral variable medium is denoted, a forward simulation of wave equation is conducted on actual well profile from the south margine of Tianshan, the reason and size of the stack velocity errors are analyzed and the methods for avoiding them are discussed, and more reliable velocity field is provided for variable diagram.

引文

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