| 基于成像域射线束建模的剩余静校正方法研究及应用 |
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| 引用本文： | 余青露,刘晗,陈林谦,马江林.基于成像域射线束建模的剩余静校正方法研究及应用[J].地球物理学进展,2020(2):680-685. |
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| 作者姓名： | 余青露 刘晗 陈林谦 马江林 |
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| 作者单位： | 中国石油化工股份有限公司石油物探技术研究院 |
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| 摘 要： | 由信噪比极低的资料生成的剩余静校正模型,其信噪比通常也较低,导致剩余静校正效果不理想,因此提高模型的信噪比,在提高资料处理品质中有着极其重要的意义.文章提出了一种基于成像域射线束建模的剩余静校正的方法.该方法是采用成像域射线束建模对数据进行分解和重构,并且根据不同的分解级数和分解尺度,分解和重构成不同成分的数据,该方法在重构的过程中加入倾角场的约束,能有效保护高陡构造.成像域射线束建模得到的第一级分量为数据的主要成分,构造保真,信噪比高,把该分量作为外部模型,进行外部模型剩余静校正.把本文方法在低信噪比资料进行应用,提高低信噪比资料的剩余静校正效果,有效的改善了资料处理成果的品质.
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| 关 键 词： | 低信噪比 剩余静校正 外部模型 成像域射线束 分解尺度 |
Research and application of residual static correction method based on imaging domain beam modeling |
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| YU Qing-lu,LIU Han,CHEN Lin-qian,MA Jiang-lin.Research and application of residual static correction method based on imaging domain beam modeling[J].Progress in Geophysics,2020(2):680-685. |
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| Authors: | YU Qing-lu LIU Han CHEN Lin-qian MA Jiang-lin |
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| Institution: | (Sinopec Geophysical Research Institute,Nanjing 211103,China) |
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| Abstract: | Reflected wave residual static correction needs a model. For the seismic with very low Signal-to-Noise Ratio(SNR), the SNR of the internal model is also very low when the residual static correction of reflected wave is carried out, therefore the residual static correction effect is unsatisfactory. We can use the external model with high SNR to residual static correction. In this paper, a residual static correction method based on imaging domain beam modeling is proposed. The imaging domain beam modeling is a method of decomposing and reconstructing data, which decomposes and reconstructs data of different components according to different decomposition series and decomposition scales, and the mothod can effectively protect steep structures by adding the constraint of dip field in the process of reconstruction. The first-order component obtained by imaging domain beam modeling is the main component of the processed data, which has the same structure and high SNR. The component is used as an external model to carry out residual static correction of the external model. In pratical application, on the basis of using near-surface static correction techlonogy to solve long and medium wavelength static correction, Monte Catlo residual static correction is obtained by using ray beam modeling technology in imaging domain. The profiles with high signal-to-noise ratio are used as external models for residual static correction. The model is applied to low SNR seismic data in Loess Plateau and southern mountain areas, which further solves the residual static correction problem of low SNR seismic data, effectively improves the SNR of seismic data, improves the continuity of reflection coaxial, and improves the imaging effect obviously. |
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| Keywords: | The low SNR data Residual static correction External model Image domain beam Decomposition scale |
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