Detailed knowledge of the subsurface elastic properties might provide much‐needed insight into the subduction‐zone structure and the estimation of reservoir parameters. Compressional and shear wave velocities can be inverted by elastic full‐waveform inversion using multicomponent ocean‐bottom seismometer data. However, this process is computationally intensive, requiring massive, repeated simulations scaling with the number of sources. Although source–receiver reciprocity can streamline elastic full‐waveform inversion, it cannot be applied by directly interchanging the positions of sources and ocean‐bottom seismometers. To reduce the computational cost, we develop a source–receiver reciprocal elastic full‐waveform inversion, in which the reciprocity in multicomponent data can be accomplished by transforming the data matching from the original geometry to a specific form under the reciprocal geometry. This approach significantly reduces computational costs from twice the number of sources, as seen in conventional elastic full‐waveform inversion, to a scale with the count of ocean‐bottom seismometers. The tests on synthetic data verify that the proposed reciprocal elastic full‐waveform inversion maintains accuracy while improving computational efficiency, and further application on the field data from East China Sea also showcases the efficiency of the proposed method, resulting in a speed‐up of 10 times.

中文翻译：

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利用海底地震仪数据进行多参数高效弹性全波形反演

对地下弹性特性的详细了解可能会为俯冲带结构和储层参数的估计提供急需的见解。压缩波和剪切波速度可以通过使用多分量海底地震仪数据的弹性全波形反演来反演。然而，这个过程计算量很大，需要根据源数量进行大规模、重复的模拟。尽管源-接收器互易性可以简化弹性全波形反演，但它不能通过直接互换源和海底地震仪的位置来应用。为了降低计算成本，我们开发了一种源-接收倒易弹性全波形反演，其中多分量数据的互易性可以通过将数据匹配从原始几何形状转换为倒易几何形状下的特定形式来实现。这种方法显着降低了计算成本，从传统弹性全波形反演中所见的源数量的两倍减少到海底地震计数量的规模。合成数据的测试验证了所提出的倒易弹性全波形反演在保持精度的同时提高了计算效率，在东海现场数据上的进一步应用也展示了该方法的效率，加速了10倍次。