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Geology-guided pore space quantification for carbonate rocks

机译:碳酸盐岩石地质引导孔隙空间量化

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The correlation between velocity and porosity or even density in carbonate rocks is normally highly scattered. This scattered pattern is an indication of a high degree of petrophysical heterogeneity within the mineral matrix and can make it more difficult to model and predict the acoustic behaviour of carbonate rocks compared to siliciclastics. This difficulty increases uncertainty in velocity prediction and is normally attributed to the heterogeneity of carbonate rocks and the complexity of their pore structure, which, furthermore, can be related to the carbonate forming processes (e.g. Rafavich et al., 1984; Anselmetti and Eberli, 1993, 2001; Saberi, 2010). The carbonate forming process starts from a wide spectrum of depositional environments and is followed by various post-depositional processes. This results in the pore structure of carbonate rocks being highly diverse and more complex compared to siliciclastic and in turn manifests the highly scattered behaviour of velocity-porosity trends (Anselmetti and Eberli, 1993). Therefore, determining pore geometry is a main requirement for carbonate rock characterization.
机译:速度和孔隙率之间的相关性或碳酸盐岩中的密度通常高度散射。这种散射的图案是矿物质基质内高度岩石物理异质性的指示,与硅化性相比,可以使模型更难以模拟和预测碳酸盐岩的声学行为。这种困难增加了速度预测中的不确定性,并且通常归因于碳酸盐岩的异质性和其孔结构的复杂性,此外,这可能与碳酸盐形成过程有关(例如Rafavich等,1984; Anselmetti和Eberli, 1993年,2001年; Saberi,2010)。碳酸盐形成过程从宽的沉积环境开始,然后是各种沉积后的过程。这导致碳酸盐岩的孔结构高度多样化,更复杂,与硅质塑相比表现出高度散射的速度趋势趋势(Anselmetti和Eberli,1993)的高度散射行为。因此,确定孔几何形状是碳酸盐岩石表征的主要要求。

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