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首页> 外文会议>SEG Houston 2013 >Correlation between rock properties and spatial variations in seismic attributes for unconventional gas shales - a case study on the Haynesville Shale
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Correlation between rock properties and spatial variations in seismic attributes for unconventional gas shales - a case study on the Haynesville Shale

机译：非传统天然气神庙岩石特性与空间变化的相关性 - 以海恩斯维尔页岩为例

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摘要

Spatial variations in seismic attributes, such as P-wave amplitude and inverted P-impedance, are correlated with the rock properties that are important for the exploration and production of unconventional gas shales. It is important to know which rock properties or combination of properties cause the spatial variations. In this study, we have estimated three important rock properties (porosity, composition and pore shape) at the seismic scale by combining seismic inversion with a rock physics modeling workflow. We found that different P-impedances correspond to different distributions of porosity, composition and pore shape. Thus, the spatial variations in seismic attributes depend on all these rock properties. In general, large porosity, softer composition, and small pore aspect ratios correspond to lower P-impedance. However, lower P-impedance does not necessarily always correspond to large porosity, softer composition and small pore aspect ratio because these rock properties jointly affect the seismic attributes. One or two of them possibly dominate the effect on P-impedance. Therefore, these rock properties need to be investigated simultaneously. Continuous distributions of porosity, composition and pore aspect ratio will be estimated in the 3D seismic block by the same procedure, and we will be able to understand how the rock properties contribute to the seismic attribute spatial variations in a more comprehensive way, including an assessment of the uncertainty.
机译：在地震属性，诸如P波振幅和倒P-阻抗空间变化，与岩石性质是非常规气体页岩的勘探和生产的重要关联。重要的是要知道哪个岩石属性或属性组合会导致空间变化。在这项研究中，我们通过将地震反演与岩石物理建模工作流程相结合，估计了抗震级的三种重要岩石性质（孔隙率，组成和孔形）。我们发现不同的P型阻抗对应于不同的孔隙率，组成和孔形状的分布。因此，地震属性的空间变化取决于所有这些岩石属性。通常，大孔隙率，较软的组合物和小孔纵横比对应于较低的P阻抗。然而，降低P阻抗不一定始终对应大的孔隙率，更柔软的组成和小孔纵横比，因为这些岩石性能联合影响地震属性。其中一个或两个可能主导对P防震的影响。因此，需要同时研究这些岩石特性。通过相同的程序将在3D地震块中估计孔隙率，组成和孔宽高比的连续分布，我们将能够了解岩石属性如何以更全面的方式对地震属性的空间变化有助于，包括评估不确定性。

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