基于Poynting矢量的角度域逆时偏移成像及对成像幅度的校正（英文）

发布时间：2019-05-06 05:32

【摘要】：研究了基于Poynting矢量的角度域逆时偏移成像及成像幅度的校正方法。根据Poynting矢量进行波场角度分解,由此构建局部成像矩阵及局部照明矩阵。在局部成像矩阵中建立的角度域成像条件,有效地消除了低波数干扰,同时可在局部成像矩阵中进行角度域共成像点道集抽取、倾角估计等运算。利用局部照明矩阵进行了基于全波波动方程的时域照明分析,在局部照明矩阵中计算倾角域幅度校正因子。根据逆时偏移的像计算共倾角像,利用校正因子对各角度的像进行校正,进而实现对成像结果的校正,从而实现了一种高效的倾角域幅度校正方法。最后通过SEG/EAGE模型进行数值计算验证了文中所述的计算方法。
[Abstract]:The angle domain inverse time migration imaging based on Poynting vector and the correction method of imaging amplitude are studied in this paper. According to the Poynting vector, the wave field angle decomposition is carried out, and the local imaging matrix and local illumination matrix are constructed. The angle-domain imaging conditions established in the local imaging matrix can effectively eliminate the low wavenumber interference, and can be used to extract the angle-domain common imaging point gather and estimate the inclination angle in the local imaging matrix. The time domain illumination analysis based on the full wave equation is carried out by using the local illumination matrix, and the amplitude correction factor in the angle domain is calculated in the local illumination matrix. Based on the inverse time-offset images, the co-dip images are calculated, and the correction factors are used to correct the images at various angles, so that the imaging results can be corrected. Thus, an efficient angle-domain amplitude correction method is realized. Finally, the calculation method described in this paper is verified by numerical calculation of SEG/EAGE model.
【作者单位】：常熟理工学院电气与自动化工程学院;加州大学圣克鲁斯地球物理及行星科学研究所;中山大学地球科学与地质工程学院;
【基金】：sponsored by the Natural Science Fund of Heilongjiang Province(No.F201404)
【分类号】：P631.4

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