Analysis of Borehole Images and Their Application to Geologic Modeling of an Eolian Reservoir

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Abstract
Summary: New wellbore imaging techniques significantly enhance geologic descriptions of reservoirs. These new techniques include electrical images formed by the Formation MicroScannerSM (FMS) tool and acoustic images made by a digital borehole televiewer tool (BTT). Quantitative image-analysis software is described that provides strike and dip measurements of tectonic and sedimentary structures and the orientation of the contemporary stress field. This software was used to map geologic features from images acquired in a North Sea reservoir. Quantitative geologic models constructed from these image data highlight the interrelated effects that fractures, anisotropic stress, and bedding may have on the directional permeability in this reservoir.

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