Geological Survey of Denmark and Greenland Bulletin 19 ... - Geus

to provide further funding for studies to overcome the
disappointing outcome of the 1992 licensing round.
More field work was carried out on Disko, Nuussuaq and
Svartenhuk Halvø in the period between 1994 and 2002.
During the summer of 1995, the Survey acquired more
than 3700 km of seismic and gravity data, mainly in the
fjords and sounds around Disko and Nuussuaq (Chri -
stiansen et al. 1996a), and a 1200 m deep stratigraphic
slim-core hole (Umiivik-1) was drilled on Svartenhuk
Halvø in 1995 (Bate & Christiansen 1996). Additional
information was obtained using seismic and magnetic data
from the 1970s combined with an aeromagnetic survey
flown over the area in 1997 (Rasmussen et al. 2001).
The most important results from these studies include:
Fig. 9. The GRO#3 exploration well on western Nuussuaq drilled
by the Canadian company grønArctic Inc. in 1996. For location, see
Fig. 65; the drilled succession is shown in Fig. 67. Photo: Kim Zinck-
Jørgensen.
Canadian company, held a concession in western Nuus -
suaq from 1994 to 1998. During this period, the company
drilled four slim-core wells (GANW#1, GANE#1,
GANK#1 and GANT#1) and one conventional exploration
well (GRO#3) to a depth of 2996 m (Fig. 9). The
wells were drilled in areas where geological information
on the sediments beneath the volcanic rocks was completely
lacking, and they provided a large volume of new
data that also tied the outcrop areas together. Detailed
sedimentological, organic geochemical and palynostratigraphical
analyses of the wells were carried out by
the Survey and were published in numerous reports of
the ‘Danmarks og Grønlands Geologiske Undersøgelse
Rapport’ series in 1996–97. Many of the results have
later been incorporated into and summarised in other publications.
The positive results from the years 1990–1994 encouraged
the Government of Greenland and the Danish State
1) Interpretation of seismic and magnetic data, forward
modelling of gravity profiles and a reappraisal of all
available data on faults in the onshore areas (Chalmers
et al. 1999).
2) Documentation of several oil types in surface oil seeps
and wells and several possible source rock intervals
and their possible correlation with Cenomanian–
Turonian oils from the Central Western Interior Seaway
in North America, or to Upper Jurassic-sourced oils
from the Jeanne d’Arc Basin offshore Newfoundland
and in the North Sea (Bojesen-Koefoed et al. 1999,
2004, 2007; Christiansen et al. 2002).
3) Documentation of wet gas in the Umiivik-1 well (Fig.
73), suggesting the presence of a good, but overmature,
Turonian source rock for condensate or oil (Dam
et al. 1998b).
4) Establishment of a new biostratigraphic scheme for the
Cretaceous and Paleocene onshore and offshore deposits
(Nøhr-Hansen 1996; Nøhr-Hansen et al. 2002; Søn -
derholm et al. 2003).
5) Documentation of promising reservoir intervals in
the turbidite succession and a quantitative log-interpretation
of the upper part of the GRO#3 well (which
was not tested prior to casing), suggesting high hydrocarbon
saturations in sandstone units (Kristensen &
Dam 1997; Dam et al. 1998d; Kierkegaard 1998).
6) Completion of the geological mapping of eastern
Disko and south-east Nuussuaq (A.K. Pedersen et al.
2000, 2001, 2007a, b). Extensive photogrammetrical
work forms the basis of five geological profiles through
the Nuussuaq Basin (1:20 000). These profiles document
the sediments of the Nuussuaq Group and the
overlying West Greenland Basalt Group, including
the relationships between the early volcanic rocks and
the synvolcanic sediments (A.K. Pedersen et al. 1993,
2002, 2003, 2005, 2006a, b).
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