Calibration of prestack simultaneous impedance inversion using rock physics
Calibration of prestack simultaneous impedance inversion using rock physics
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DOI：
10.1190/1.3535435
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发表时间：
2010-06
期刊：
影响因子：
3.3
通讯作者：
S. Singleton;R. Keirstead
中科院分区：
文献类型：
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作者：
S. Singleton;R. Keirstead
本文是油藏描述系列文章的第三部分，这些文章遵循一个工作流程，其最终目标是了解和预测远离井控的油藏岩石特性。第一篇文章（Singleton，2008）描述了一种检测异常地震衰减的方法。这一点很重要，因为在井位置处的地震数据具有由储层间隔内和上方的高衰减引起的振幅的急剧下降。第二篇文章（Singleton，2009年）涉及输入反演过程的地震道集。同时进行叠前反演的数据质量应尽可能高，这一点至关重要。地震道集误差（低信噪比、由于动校正拉伸过大而造成的分辨率损失、非平坦反射体、偏移振幅问题、多次波等）直接传播到反演阻抗体积中，因此这是地球物理储层表征中的关键步骤。
This paper represents the third installment in a sequence of reservoir characterization articles that follow a workflow whose ultimate goal is to understand and predict the rock properties of a reservoir away from well control. The first article (Singleton, 2008) described a method to detect anomalous seismic attenuation. This was important because seismic data at the well location have a steep falloff in amplitude caused by high attenuation in and above the reservoir interval. The second article (Singleton, 2009) dealt with the seismic gathers that were input into the inversion process. It is of the utmost importance that the quality of data input into a simultaneous prestack inversion be as high as possible. Errors in seismic gathers (low SNR, resolution loss from excessive NMO stretch, nonflat reflectors, offset amplitude problems, multiples, etc.) are broadcast straight into the inversion impedance volumes, so this is a critical step in geophysical reservoir characterization.