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Abstract
Chapter from: M
61: Basin Compartments and Seals
Edited by
Peter J. OrtolevaAuthors:
X. Chen, H. P. Heasler, and L. Borgman Methodology and Concepts
Published 1994 as
part of Memoir 61
Copyright © 1994 The American Association of Petroleum
Geologists
All Rights Reserved
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Chapter 17
*
Geostatistical
Methods for the Study of Pressure Compartments: A Case Study in the Hilight
Oil Field, Powder River Basin, WyomingX. Chen*
H. P. Heasler
L. Borgman
University of Wyoming
Laramie, Wyoming, U.S.A.
*
ABSTRACT
This chapter introduces the variogram
method for analyzing the geometry of pressure compartments. Pressure and
hydraulic head data from 192 wells in the Hilight oil field, Powder River
basin, Wyoming, were used in this study. Variograms were calculated for
various directions. Results indicate that hydraulic head and pressure are
spatially correlated, especially in directions parallel to the axes of
elongation of compartment cells. The average pressure compartment was estimated
via the variogram method to be an ellipse with major and minor axes of
5.3 and 2.7 mi (8.5 and 4.3 km). The major axis trends 15° azimuthally,
the minor axis 285°. |
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