Abstract: A systematic method of analyzing petroleum fabric for unconsolidated reservoirs is disclosed. The method includes the steps of: obtaining an oil sands sample that defines a fabric, preparing a thin section to a predetermined thickness; setting a microscope magnification; setting a bar scale, placing the thin section under the microscope, observing and identifying elements of the fabric, categorizing the elements of the fabric, using the bar scale, based on a predetermined coarse-to-fine limit. Accordingly, first elements of the fabric are categorized as coarse components if the first elements are larger than the predetermined coarse-to-fine limit, second elements of the fabric are categorized as fine components if the second elements are smaller than the predetermined coarse-to-fine limit, and voids are categorized where the elements of the fabric are absent. The method steps further include recording, to produce data, the categorizations of the elements of the fabric and applying the data.