陆上地震资料多次波识别与压制技术

Multiple identification and suppression on land seismic data

陆上复杂区地震资料中的多次波通常不易识别且难以压制。本文以海南福山凹陷等地区的地震资料为例,介绍了通过综合分析叠加剖面、道集和速度谱等方法,识别陆上的多次波;通过分析GeoEast处理系统多次波压制技术,选择对陆上地震资料多次波压制有效的高精度Radon变换、聚束滤波、基于波场延拓的多次波预测减去法等技术,对陆上地震资料存在的多次波予以压制。

The identification and suppression of multiples are tough challenges on complex land seismic data.In this paper we discuss multiples on seismic data in Fushan Sag,Hainan,and demonstrate multiples identification with stack,gather,and velocity spectrum analysis.We eliminate multiples on these seismic data sets with some techniques provided by GeoEast Processing Sub-system including Radon transform,beam filtering,and multiple prediction and subtraction based on wave field extrapolation.Good results obtained prove the correctness of the processing techniques.