三维多分量地震资料处理技术研究

3D multi-component data processing technologies

在三维多分量地震资料处理中,鉴于多分量的矢量波场特征和转换波传播路径非对称的特殊性,研究和开发了适合多分量地震资料处理的专用方法。这些处理方法包括:三维多分量地震资料的水平分量旋转、多分量叠前去噪、转换波静校正、纵波和横波垂直速度比计算、转换波共渐进线转换点面元和共转换点面元抽取、各向异性叠加速度分析、各向异性动校正、叠前时间偏移速度分析、直射线和弯曲射线的各向异性叠前时间偏移等,由此组成了最基本的三维多分量地震资料处理流程。将上述处理流程应用于实际三维多分量地震资料的处理,取得了令人满意的处理效果。

Special technologies suitable for 3D multi-component data processing need to be developed due to the vector particularity of multi-component data and asymmetric propagation path of converted wave(C-wave).The series of technologies include geometry rotation.multi-component prestack denoising,C-wave statics,υ_P /υ_S calculation,C-wave common asymptotic conversion points(ACP) binning,C-wave common conversion points(CCP) binning,anisotropic stack velocity analysis,anisotropic normal moveout(NMO) correction,prestack time migration(PSTM) velocity analysis,anisotropic PSTM processing and band-ray anisotropic PSTM etc, which composes of the basic 3D multi-component data processing flow.The above processing workflow is applied to actual 3D data, and ideal results have been achieved.