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Correlation between seismic diffractions extracted from vertical seismic profiling data and borehole logging in a carbonate environment

机译：从碳酸盐岩环境中垂直地震剖面数据提取的地震衍射与井眼测井之间的相关性

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Seismic diffractions may play an important role in seismic interpretation because they characterize geologic objects that might not be visible for conventional seismic attribute analysis. Diffractivity may be caused by, and consequently may define, tectonic dislocations (faults and fractures), lithologic variations, and fluid saturation within rocks. We have tied seismic diffractions extracted from vertical seismic profiling (VSP) data and borehole logging, from which we recognized the reasons that were responsible for diffractivity of the strata. First, we processed a multisource multicomponent VSP data set to extract seismic diffractions and constructed diffraction images of the strata for all three of the VSP data components. Then, we performed joint analysis of well logs and diffractions to obtain petrophysical attributes associated with diffraction images. We divided the rock succession into several units, which have different diffraction properties. We identified compacted rock, alternating intervals, isolated fractured zones, and fluid-saturated layers.
机译：地震衍射在地震解释中可能起重要作用，因为它们表征了常规地震属性分析可能看不见的地质对象。衍射可能是由构造错位（断层和裂缝），岩性变化和岩石内的流体饱和度引起的，并因此可能引起的。我们将从垂直地震剖面（VSP）数据和钻孔测井中提取的地震衍射联系起来，从中我们认识到造成地层衍射的原因。首先，我们处理了多源多分量VSP数据集，以提取地震衍射，并为所有三个VSP数据分量构造了地层的衍射图像。然后，我们进行了测井和衍射的联合分析，以获得与衍射图像相关的岩石物理属性。我们将岩层划分为几个具有不同衍射特性的单元。我们确定了压实的岩石，交替的间隔，孤立的裂缝带和流体饱和层。

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