Marine vibrators represent an alternative seismic source technology that could come to market in the near future. A key challenge related to marine vibrator seismic data is the effect that phase dispersion from source motion has on the signal during transmission. As such, the recorded moving vibrator data will benefit from being phase corrected, so that the data appear as if they had been shot with a stationary source. This transformation is called the source motion correction. Previous source motion corrections used either specific dephasing operators for specific sweep types or pre-correlation methods for any sweep type. A source motion correction dephasing operator has been derived, demonstrated and applied to real seismic data collected during a Marine Vibrator Joint Industry Project field trial of an array of marine vibrators. This dephasing operator has been made more general so that any strictly monotonic sweep through time may be used for this correction regardless of sweep type (e.g. linear or exponential). Moreover, the correction uses the pilot sweep as a direct input, measuring from it, the instantaneous frequency which can then be used to build the dephasing operator. This new more general form brings two key advantages over previous dephasing operator corrections: (1) Non-analytically defined sweeps can now be source motion corrected, and (2) even when an analytically defined sweep (e.g. linear) is used, the transmitted sweep from the marine vibrator can vary from the theoretical input sweep; this correction can account for these changes. Furthermore, given that this source motion correction is a dephasing operator, it can be applied pre- or post-correlation of the raw data with the pilot sweep, thus allowing greater flexibility in the processing. Lastly, some previously derived source motion corrections based on dephasing operators contained errors in their derivation; this new derivation addresses these errors resulting in an improved correction.

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用于严格单调扫描的海洋振动源运动校正

海洋振动器代表了一种替代震源技术，可能在不久的将来上市。与海洋振动器地震数据相关的一个关键挑战是源运动的相位色散对传输过程中信号的影响。因此，记录的移动振动器数据将受益于相位校正，使得数据看起来就像是用固定源拍摄的。这种变换称为源运动校正。以前的源运动校正对于特定扫描类型使用特定的移相算子，或者对于任何扫描类型使用预相关方法。源运动校正相移算子已被导出、演示并应用于在海洋振动器联合工业项目对海洋振动器阵列进行现场试验期间收集的真实地震数据。该移相算子已变得更加通用，以便任何严格单调的时间扫描都可以用于该校正，而不管扫描类型（例如线性或指数）。此外，校正使用导频扫描作为直接输入，从中测量瞬时频率，然后可以使用该瞬时频率来构建移相算子。与之前的移相算子校正相比，这种新的更通用的形式带来了两个关键优势：(1) 现在可以对非分析定义的扫描进行源运动校正，以及 (2) 即使使用分析定义的扫描（例如线性），传输的扫描海洋振动器的输入扫描可能与理论输入有所不同；此修正可以解释这些变化。此外，考虑到该源运动校正是移相算子，它可以应用于原始数据与导频扫描的预相关或后相关，从而允许处理具有更大的灵活性。最后，一些先前基于移相算子得出的源运动校正在其推导中包含错误；这个新的推导解决了这些错误，从而改进了校正。