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U.S. Department of Energy
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Application of borehole images to geologic modeling of an eolian reservoir

Conference ·
OSTI ID:6975485
New digital imaging techniques contribute significantly to a detailed geologic description of reservoirs. These new techniques include electrical images formed by the Formation MicroScanner (FMS) tool, an electrode array applied to the wellbore, and acoustic images produced by a digital borehole televiewer (BHTV). A quantitative image analysis software is described that provides strike and dip measurements of geologic structures, sedimentary structures, fractures and faults as well as the orientation of the contemporary stress field. These techniques were used to map tectonic and sedimentary structures from images acquired in a fractured eolian reservoir in the North Sea. Tectonic structures included several fracture sets, a steeply dipping fault and wellbore breakouts. Sedimentary structures included foresets and set boundaries of cross-bedded eolian sandstones and interdune deposits. Quantitative geologic models were constructed from images acquired in a fault zone and a cross-bedded sequence. These geologic models highlight the interrelated effects that fractures, anisotropic stress and bedding have on the directional permeability in this reservoir.
Research Organization:
Schlumberger-Doll Research, Ridgefield, CT 06877
OSTI ID:
6975485
Report Number(s):
CONF-861080-
Country of Publication:
United States
Language:
English