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Abstract
AAPG Methods in Exploration No. 13, Chapter 2: Enhancing
the Gamma-ray Log Through Geological Input: Evaluating Thin-bedded Turbidite Sequences, by
Cees R. Geel, Pages 15 - 26
from:
AAPG Methods in Exploration No. 13: Geological Applications of Well Logs, Edited
by M. Lovell and N. Parkinson
Copyright © 2002 by The American Association of Petroleum Geologists. All rights
reserved.
Chapter 2
Enhancing the Gamma-ray Log Through Geological Input: Evaluating Thin-bedded
Turbidite Sequences
Cees R. Geel
Delft University of Technology
Delft, Netherlands
ABSTRACT
Petroleum-bearing beds thinner than 30 cm are difficult to identify on conventional
well logs. Especially in the case of a regular alternation of sandstone and shale, as in
many turbidite sequences, recognition of individual sandstone and shale beds can be
extremely difficult. Well-log processing techniques such as alpha processing or
deconvolution have been developed to address this issue but are of limited help.
Therefore, formation evaluation in thin-bedded low-resistivity pay sands is cumbersome, as
are geological interpretation and correlation.
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