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Book Chapter

Applications of Oil-base Mud Earth Imager for a High-temperature and High-pressure Exploration Well

By
Robert Maddock
Robert Maddock
Baker Hughes, Stoneywood Park North, Aberdeen, United Kingdom
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Rodmar Ravnas
Rodmar Ravnas
Norske Shell A/S, Tananger, Norway
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Published:
January 01, 2010

Abstract

An exploration well was drilled as a wildcat targeting high-pressure and high-temperature gas condensates within Jurassic-age reservoir sandstones offshore Norway. The well, drilled to a depth of more than 5000 m (16,404 ft) subsea with bottom-hole temperatures up to 176 °C and mud pressures up to 93 MPa, was successfully tested. As part of a comprehensive logging and coring program, oil-base mud EARTH Imager℠, Baker Hughes/Baker Atlas data were acquired in the discovery well. The objectives of the wellbore imaging were to determine the structural dip, confirm the presence or absence of (seismic and subseismic) faults, support detailed core sedimentology studies, and determine the orientations of depositional or architectural elements. This contribution summarizes the acquisition and interpretation of the borehole images. Structural dip and an apparent low density of faulting interpreted from the images were consistent with the predrill structural interpretation. Comparison of the core and images assisted in the characterization and orientation of the depositional architecture.

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Contents

AAPG Memoir

Dipmeter and Borehole Image Log Technology

M. Pöppelreiter
M. Pöppelreiter
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C. García-Carballido
C. García-Carballido
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M. Kraaijveld
M. Kraaijveld
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American Association of Petroleum Geologists
Volume
92
ISBN electronic:
9781629810263
Publication date:
January 01, 2010

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