摘要
多次波的识别和压制是陆上,特别是海洋地震勘探中需要解决的突出问题之一。首先结合某区二维深海地质资料,采用变偏移距叠加剖面、叠加速度谱、自相关分析和二维频率波数域等方法手段,对波场的特征、多次波的类型和性质进行了识别分析。然后,对于不同类型的多次波匹配地选择预测反褶积、频率波数域滤波和加权混波等方法加以压制。发挥各自方法的优点,实现了多种方法的整体综合优化,达到最大限度地压制多种类型多次波的目的。较好的实际压制效果表明上述工作思路和处理方法是有效可行的。
Multiple attenuation is a critical task for seismic data processing, especially for marine data. The characteristics of wave field, the categories and properties of multiple of some 2D offshore data are firstly analyzed and discriminated by means of profiles of different offsets, velocity spectrum, analysis of auto-correlation and frequency-wave number. Predictive deconvolution, filtering in the frequency-wavenumber domain and weighted mixing of traces are then used in suppressing multiple according to the categories of multiple. Better suppression of multiple by optimization of integrated processing method shows that the strategy is effective and feasible.
出处
《现代地质》
CAS
CSCD
2003年第4期474-478,共5页
Geoscience
基金
国家"八六三"计划项目(2001AA602018)
国家自然科学基金项目(49974028)。
关键词
地震多次波
类型
性质
识别分析
压制
整体综合优化
category and property of multiple
analysis and discrimination of multiple
optimization of integrated processing method
suppression of multiple
