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Book Chapter

Utility of Mechanical Facies for Rock Classification, Characterization, and Correlation

By
K. A. Alhilali
K. A. Alhilali
Mobil Research and Development Corporation, Dallas Research Laboratory P.O. Box 819047, Dallas, Texas 75381-9047
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G. Shanmugam
G. Shanmugam
Mobil Research and Development Corporation, Dallas Research Laboratory P.O. Box 819047, Dallas, Texas 75381-9047
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Published:
January 01, 1991

Abstract

Mechanical facies, which represent the rocks' dynamic and mechanical properties, can be used to characterize and subdivide reservoir formations at the borehole and in areas between wells. For example, the mechanical fades of the Travis Peak-Cotton Valley sequence of east Texas and western Louisiana can be used to distinguish and accurately map poor reservoir calcite-cemented zones. Mechanical facies are derived from acoustic logs where both compressional and shear wave velocities are obtained.

The advantages of using mechanical facies for reservoir characterization, classification, and subdivision are:

  1. Mechanical facies are a quantification of a rock's in-situ physical properties and can reflect the dynamic characteristics of the reservoir.

  2. Mechanical facies may provide useful information away from the borehole by combining acoustic logging and tomographic survey data to classify and characterize reservoir zones laterally as well as vertically.

  3. Mechanical facies can be used for well-to-well correlation.

  4. Mechanical facies provide a continuous record and can be obtained in uncased or, under proper conditions, cased wells.

The versatility of mechanical facies for reservoir description and characterization is illustrated by several examples from diverse areas and for varying lithology.

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Contents

AAPG Special Publication

The Integration of Geology, Geophysics, Petrophysics and Petroleum Engineering in Reservoir Delineation, Description and Management

Robert Sneider
Robert Sneider
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Wulf Massell
Wulf Massell
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Rob Mathis
Rob Mathis
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Dennis Loren
Dennis Loren
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Paul Wichmann
Paul Wichmann
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American Association of Petroleum Geologists
ISBN electronic:
9781629811192
Publication date:
January 01, 1991

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