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Abstract

A geologic model is essential for characterization and modeling of hydrocarbon reservoirs, and depositional facies are a main parameter controlling heterogeneity in porosity and permeability. Quantification of facies attributes (size, shape, orientation, and distribution) can decrease uncertainty in a geologic model and therefore enhance the model’s utility. This study uses Landsat images of modern isolated carbonate platforms to evaluate platform characteristics, facies distribution, and facies attributes, and assess quantitative relationships among these parameters. Facies include fully aggraded reef, partially aggraded reef, reef apron, shallow platform interior, shoals, intermediate platform interior, deep platform interior, forereef and outer platform, and land. Statistical analyses demonstrate the existence of relationships between the configuration and composition of facies tracts on and among carbonate platforms, which become useful predictive tools. In addition, several aspects of reef-belt facies have been quantified, including the abundance by platform size, width and variability, length and variability, and aspect ratio. The results offer insights that could be used for better prediction of facies distribution in ancient platforms and reservoirs.

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