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Book Chapter

The Application of Borehole Image Logs to Fluvial Facies Interpretation

By
Marinus E. Donselaar
Marinus E. Donselaar
Department of Geotechnology, Delft University of Technology
, Delft,
Netherlands
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Jasper M. Schmidt
Jasper M. Schmidt
Chevron Exploration and Production Netherlands B.V.
, Voorburg,
Netherlands
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Published:
January 01, 2010

Abstract

Electrical borehole image logs have the potential for the direct interpretation of lithofacies types. The challenge is to create a set of diagnostic criteria with which microresistivity variations can be translated to lithofacies characteristics such as bedding sequences, sedimentary structures, and vertical grain-size successions. Behind-outcrop logging is a method to directly validate the borehole images to real rock. In this chapter, sediments of the Huesca fluvial fan (Miocene, Ebro Basin, Spain) are used for the validation of behind-outcrop borehole image logs. The logs were recorded in two 200-m (656-ft)-deep wells behind cliff-face outcrops. In addition to the outcrop control, one well was cored. Borehole image log facies were defined from the vertical color succession and the dipmeter pattern and were correlated with the fluvial facies associations in outcrop. Four fluvial facies associations and corresponding borehole image facies were interpreted: (1) meandering rivers, (2) braided rivers, (3) crevasse deltas, and (4) crevasse splays. Vertical dipmeter successions were analyzed and yielded directional trends of the fluvial channels.

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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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