ICELAND OFFSHORE EXPLORATION APPEX2011 · Mosar, J. et al (2002): North Atlanti sea-floor spreading...

ICELAND

OFFSHORE EXPLORATION

APPEX2011

LONDON

1st of March 2011

Anett Blischke, ISOR

Thorarinn S. Arnarson, NEA

ORKUSTOFNUNNational Energy Authority

Second Icelandic Licensing Round

Northern Dreki Area

Licensing Round is set to open on the 1st of August 2011

Application deadline is on the 1st of December 2011

Norway (Petoro) has right to participate up to 25% in licenses granted within the Jan Mayen Agreement Area

Icelandic licensing system is similar to system in other European countries, as the Hydrocarbons Act transposes EU Directive 94/22/EC into Icelandic law

Hydrocarbon Tax Act to be revised prior to licensing round

ORKUSTOFNUNNational Energy AuthorityAPPEX2011, London, 1st – 3rd March


The North Dreki

Licensing Area

Location Reference

North Dreki is part of the Jan

Mayen Micro-Continent

(JMMC) with strong

indications of continental

strata and good structures

Similarities to the middle

East Greenland coast that is

part of Greenland Licensing

areas, and the Møre Basin

at the Norwegian coast,

which is a proven

hydrocarbon province.

APPEX2011, London, 1st – 3rd March

Available Data Information System

Iceland Continental Shelf Portal


Online GIS based Web-Portal (National Energy Authority & Iceland Geosurvey)

http://www.icsp.is


http://www.landgrunnsvefsja.is/

2D Seismic reflection data surveys over the Jan Mayen Area


NPD-NEA SurveysCommercial Surveys


2009 Spectrum

commercial survey,

reprocessed JM-85 data

Seismic reflection & refraction data surveys across the Jan Mayen Area


Important OBS Data Research

Academic Surveys


Borehole & Seafloor Samples

around the Jan Mayen Area

Academic DSDP & ODP Cruises


TD: 1663m

Fm@TD: 26m drilled into

BASALT BRECCIA/DIABASE BASALT

TD: 2307m

Fm@TD: 17m drilled into

VARIOLITIC BASALT

5 wells during Leg 38 in 1974

1 well during Leg 151 in 1993

2 wells during Leg 162 in 1995

Wells have core analysed based density and vertical

velocity data available that enabled a depth – seismic

tie (TWT) to confirm the Top Eocene marker for 3 wells

on the Ridge.

Tectonic History of the JMMCCollage based on results of recent research publications and observations at the JMMC


Data Source Reference List:Dinkelman M.G. et al (2010): The NE Greenland Continental Margin. GeoExpro, No. 6. Gaina, C. et al (2009): Palaeocene-Recent plate boundaries in the NE Atlantic and the formation of the Jan Mayen microcontinent. Journal of the Geological Society, London,

Vol. 166, pp. 1-16. Gernigon L. et al (2009): Geophysical insights and early spreading history in the vicinity of the Jan Mayen Fracture Zone, Norwegian-Greenland Sea. Journal of Tectonophysics, Vol. 468, pp. 185-205. Roberts, A.M. et al (2009): Mapping

palaeostructure and palaeobathymetry along the Norwegian Atlantic continental margin: Møre and Vøring basins. Petroleum Geoscience, Vol. 15, pp. 27-43. Brekke H. et al (2008): The Geology of the Norwegian Sea Continental Margin and Probable Similarities

with the Jan Mayen Ridge. 1st Petroleum Exploration Conference in Iceland. Henriksen, N. et al (2008): Geological History of Greenland - Four billion years of Earth evolution. Geological Survey of Denmark and Greenland (GEUS), Ministry of Climate and Energy,

Copenhagen. Mjelde, R. et al (2008): Crustal transect across the North Atlanti., Marine Geophysical Researches, Vo. 29, pp. 73-87. Mueller, R.D. et al (2008): Palaeo-age, depth-to-basement and bathymetry grids of the world's ocean basins from 140-1 Ma.

Science, 319, 1357 (data used in GPlates 1.0 http://www.gplates.org/index.html). Mosar, J. et al (2002): North Atlanti sea-floor spreading rates: implications for the Tertiary development of inversion structures of the Norwegian-Greenland Sea, Journal of the

Geological Society, London, Vol. 159, pp. 503-515. Gunnarsson, K. (1990): Olíuleit á Jan Mayen-Hrygg, Erindi á ársfundi Orkustofnunar. Gunnarsson, K. et al (1989): Geology and hydrocarbon potential of the Jan Mayen Ridge. Oljedirektoratet, OD-89-91 and

Orkustofnun OS-89036/JHD-07, report, pp. 143.

http://www.gplates.org/index.html









Magnetic Strength (0 to -300 nT) Map(JM-85 Gravity/Magnetic data set modified after Gunnarsson, K. 1995)

Clues to the main structural outlines of JMMC

Oceanic crustOceanic crust

Intrusive

centers?

Intrusive

centers?


Early to Late Oligocene composite sheet

of flat-lying intrusive covering subsided

continental crust just before oceanic

crust started to form on the Kolbeinsey

Ridge and the Iceland Plateau.

SDR (Seaward Dipping Reflectors)

Free Air Gravity >50Gal following the

main structural blocks of the JMMC.

Important Fault / Fractures Zones that

influence and subdivide the JMR.











Top Paleocene Structure Map(Depth Range: 170m – 6100m)

Structural Compartmentalization of the JMMC












Top Paleocene Faults

Minor reverse faulting visible

(poss. since the Middle Miocene parallel

the opening of the Kolbeinsey Ridge)











Top Paleocene Faults

Minor reverse faulting visible

(poss. since the Middle Miocene parallel

the opening of the Kolbeinsey Ridge)

Stratigraphy

Gaina et al. (in press

Sagex (

2008)

The Norwegian and Greenland

margins give the end points of the

possible sub-Tertiary strata for the

JMR.

Well documented correlation of source and reservoir rocks for those end points

A similar geological development for the Jan Mayen area especially in comparison with the Greenland margin might be a reasonable assumption, but has not been proven through exploration drilling.


?

?

?

?

Jan

Mayen

Tro

ug

h

?


NNESSW

New 2D Seismic Quality Data = More Possibilities for Data InterpretationPossible Sub Tertiary unconformities become better visible below the Top Paleocene

▬ Seabed

▬ BU-2 Late Oligocene

▬ Base Late Oligocene

▬ Top Eocene

▬ UC Middle Eocene

▬ UC Top Paleocene

▬ UC Late Paleocene poss.

▬ Top Mesozoic poss.

▬ Top Paleozoic poss.

(or actual Basement ???)

▬ Top Basement poss.

(Crystalline ??? deep reflector)

Image by courtesy of Spectrum


Regional Correlations important for comparison to the history of the JMMCCollage based on results of recent research publications and observations at the JMMC

4

4

1

2

3

5

6

?


Regional Correlations important for comparison to the history of the JMMCCollage based on results of recent research publications and observations at the JMMC

1

2

3

4

5

6

Danmarkshavn & Thetis Basins Vøring Basin

Møre Basin

Jan Mayen Micro-Continent

Jameson Land Basin, Liverpool High & Basin

Kangerlussuaq

50 km

10 m

s10 k

m

50 km

Modified after Brekke, H. et al, 2000

Modified after Brekke, H. et al, 2000

Modified after Dinkelman, M.G. et al, 2010

Modified after Henriksen, N. et al, 2008

Modified after Henriksen, N. et al, 2008

?

Main Hydrocarbon Exploration Risks for the Dreki Area

Structural and stratigraphic analysis uncertainties due to difficulties of sub-basalt seismic

imaging and complex structural history.

Nowhere near deep offset, sub-Tertiary penetrating well control to tie seismic to

stratigraphy, therefore seismic analogue comparison with East Greenland and Norway

examples are primarily applied.

Potential source rock uncertainties, if present most probably similar to East Greenland

type locations.

Seismic anomalies, slick mapping indicate that hydrocarbons may be present, but could

not be confirmed through sea-floor sampling.

The location of the JMMC relative to the Icelandic hot-spot during opening of the North-

Atlantic requires a review of traditionally used geothermal gradient models for maturity

modeling and analysis.


Hydrocarbon Potential for the Dreki Area

Best analogue comparison with East Greenland exploration examples and Møre Basin for

the Norwegian side.

Post Paleocene sedimentary rocks of sufficient thickness and age.

Indications of pre-opening sedimentary strata of possibly Paleozoic, Triassic-Jurassic and

maybe Cretaceous age, primarily underneath the west flank areas of the ridge.

Potential reservoir rocks, focus on locally shallow marine to generally marine deposits,

especially submarine fans / turbidite deposits for post Paleocene deposits, and possibly

focus on limestone platform to continental deposits for the pre-opening formations.

Potential traps present, both structural and stratigraphic.

Hydrocarbon maturation is probably high if sufficient source rocks are present.



Thank you very much for your attention !

Acknowledgements:

Kristinn Einarsson, Inga Dóra Gudmundsdóttir, Lárus Ólafsson, Thorvaldur Bragason at NEA

Karl Gunnarsson, Gunnlaugur M. Einarsson, Bjarni Richter, Steinar Thor Gudlaugsson at Iceland Geosurvey

Bryndís Bandsdóttir, University of Iceland


ICELAND OFFSHORE EXPLORATION APPEX2011 · Mosar, J. et al (2002): North Atlanti sea-floor spreading...

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