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首页> 外文期刊>Geophysics: Journal of the Society of Exploration Geophysicists >A novel application of time-reversed acoustics: Salt-dome flank imaging using walkaway VSP surveys
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A novel application of time-reversed acoustics: Salt-dome flank imaging using walkaway VSP surveys

机译：时间反向声学的一种新颖应用：使用可控式VSP勘测的盐球侧面成像

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In this paper we present initial results of applying Time-Reversed Acoustics (TRA) technology to salt-dome flank, seismic imaging. We created a set of synthetic traces representing a multilevel, walkaway VSP for a model composed of a simplified Gulf Of Mexico vertical-velocity gradient and an embedded salt dome. We first applied the concepts of TRA to the synthetic traces to create a set of redatummed traces Without having to perform velocity analysis, moveout corrections, or complicated processing. Each redatummed trace approximates the output of a zero-offset, downhole Source and receiver pair. To produce the final salt-dome flank image, we then applied conventional, poststack, depth migration to the zero-offset section. Our results show a very good image of the salt when compared to an image derived using data from a downhole, zero-offset source and receiver pairs. The Simplicity of Our TRA implementation provides a virtually automated method to estimate a zero-offset, seismic section as if it had been collected from the reference frame of the borehole containing the VSP survey.
机译：在本文中，我们介绍了将时间反向声学（TRA）技术应用到盐球舱侧面，地震成像的初步结果。我们为由简化的墨西哥湾垂直速度梯度和嵌入式盐穹顶组成的模型创建了一组代表多级可走VSP的合成迹线。我们首先将TRA的概念应用于合成迹线，以创建一组重新基准化的迹线，而无需执行速度分析，偏移校正或复杂的处理。每条重新确定基准的迹线近似于零偏移，井下源和接收器对的输出。为了生成最终的盐穹顶侧面图像，我们然后将常规的叠后深度偏移应用于零偏移部分。与使用井下，零偏移源和接收器对的数据得出的图像相比，我们的结果表明盐的图像非常好。我们TRA实施的简单性提供了一种几乎自动化的方法来估算零偏移地震剖面，就好像它是从包含VSP测量的井眼参考框架中收集的一样。

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