复杂山地剩余静校正方法分析

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英文篇名：Analysis of Residual Static Correction Method in Complex Mountains 中文刊名：江汉石油职工大学学报 英文刊名：Journal of Jianghan Petroleum University of Staff and Workers 作者：袁龑 ; 刘倩 英文作者：YUAN Yan ; LIU Qian ; Yangtze University ; Geophysical Prospecting Research Institute of Jianghan Oilfield Company ; SINOPEC 中文关键词：复杂山地 ; 低信噪比 ; 剩余静校正 ; 周波跳跃 英文关键词：Complex Mountains ; Low SNR ; Residual Static Correction ; Cycle Skip 出版日期：2015-05-20 机构：长江大学;中国石化江汉油田分公司物探研究院; 年：2015 期：03 出版单位：江汉石油职工大学学报

摘要

剩余静校正的精度直接影响地震资料的信噪比和分辨率、速度分析质量,进而影响成像质量。复杂山地地震资料剩余静校正计算时经常会出现局部收敛不足或者收敛于局部极值(出现"周波跳跃"现象)。研究发现,当剩余静校正量超过有效波主频周期的二分之一且波形相似时,容易出现收敛于局部极值。在完成野外静校正的基础上做好资料准备和参数选择两方面工作可以消除收敛于局部极值,达到全局收敛。
The accuracy of residual static correction has a direct impact on signal noise ratio(SNR)of seismic data and quality of resolution and velocity analysis,adversely affecting imaging quality.In the process of residual static correction calculation of seismic data acquired from complex mountains with low SNR,the phenomenon of inadequate local convergence or a convergence to local extreme value(called as cycle-skip phenomenon)occurs frequently.The research shows that when the value of residual static correction exceeds half an effective dominant frequency and waveform is similar,cycle-skip phenomenon appears easily.Data preparation and parameter selection based on field static correction are responsible for total convergence of residual static correction.

引文

[1]吴波,尹成,潘树林,等.最大能量法剩余静校正的改进[J].石油地球物理勘探,2010,45(3):350~358.
    [2]张亚斌,杜贤,孔剑冰,等.复杂山地低信噪比地震资料处理方法[J].物探与化探,2005,29(1):34~39.