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反射地震采集的单炮数据中常有死道、坏道及空白道.又因深地震反射的地表条件更为复杂,所以这种现象更为常见.通过波场重建来提高原始单炮数据的利用率很有必要.基于变换域的重建方法计算速度快,对数据要求少,可以处理规则或不规则采样的数据,所以该方法适用于深地震反射数据的波场重建.Curvelet变换是一种方向性强的多尺度变换方法,因此地震数据在Curvelet域中可以稀疏的表示.利用压缩感知的原理,在Curvelet域中对深反射地震单炮记录中坏道及死道进行波场重建,并用阈值滤波技术去噪处理,结果显示该处理流程效果明显.与各向同性且均匀的介质模型检验结果区别之处是该方法能够很好地重建深层的波组抗界面的同相轴相位,但难以100%地恢复能量.这可能与地下的真实介质为各向异性的非均匀性质有关.
This phenomenon is more common due to the more complex surface conditions caused by deep seismic reflections, as single-shot data acquired by reflected seismic acquisitions are often common in wave-field reconstructions to improve the utilization of raw single-shot data Rate is very necessary.Transformation based on transform domain method is fast, less data demanding, and can deal with regular or irregular sampling data, so this method is suitable for wavefield reconstruction of deep seismic reflection data.Curvelet transform is a kind of direction Therefore, the seismic data can be sparsely expressed in the Curvelet domain.Using the principle of compressive sensing, the wavefields are reconstructed in the Curvelet domain for the bad sectors and the deadlines in a single shot record of a deep reflection seismic event, The results show that the processing flow has obvious effect.The difference between this method and the isotropic homogeneous media model test results is that this method can well reconstruct the phase of the deep wave group interface but difficult to 100 % Energy recovery.This may be related to the heterogeneity of the anisotropy of the real underground media.