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The AAPG/Datapages Combined Publications Database
AAPG Special Volumes
Abstract
from:
Chapter 16
Geosteering of High-angle Wells Using Heavy-mineral Analysis: The Clair Field, West
of Shetland, U.K.
A. C. Morton1
HM Research Associates
Woodhouse Eaves
Leicestershire, U.K.
P. J. Spicer
Ryton Exploration
GeoScience Ltd.
Barnet, Hertfordshire, U.K.
D. Ewen
BP Exploration
Aberdeen, U.K.
1Also with the Department of Geology and Petroleum Geology, University of Aberdeen, Aberdeen, U.K.
ABSTRACT
biostratigraphic
component of the
geosteering tool kit cannot be used if there is insufficient diversity of microfossils in
the sequence to be drilled. In such circumstances, alternative, less conventional
geosteering methods can be used. This paper presents the application of one such approach,
heavy-mineral analysis (HMA), in monitoring high-angle wells in the Clair field, west of
Shetland, U.K. The reservoir sequence in the Clair field comprises Devonian-Carboniferous
nonmarine fluvial and eolian sandstones that lack a continuous, diverse suite of
palynomorphs. Consequently, there is no high-resolution
biostratigraphic
framework for
reservoir
correlation
. By contrast, heavy minerals occur throughout the sequence and
therefore offer a potential for
correlation
and discrimination of different sandstone
units.
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