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Basin seismic stratigraphy and aspects of prospectivity in the NE Baffin Bay, Northwest

GreenlandWritten by:

Ulrik Gregersen, John R. Hopper & Paul C. Knutz

KFUPMEarth Science Department

Mar. 03, 2015

Presented by:Abdullah Alqubalee

g201304210@kfupm.edu.sa

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Outline• Introduction.• Objectives.• Dataset and Methodology.• Results and discussion• Conclusion.

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Introduction• The study region is located in the north-eastern part of Baffin Bay,

offshore, Northwest Greenland.

• Hydrocarbon exploration has increased significantly in this region.

• Extensive geophysical surveys have been acquired during the last few years in this region.

• About 2746 million barrels of oil have been estimated in this region.

• Reassessment and review the tectonostratigraphic evaluation of the region with a particular focus on the development of basin is needed.

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Objectives• To outline the structures and basins in the north-eastern Baffin Bay

region.

• To discuss the results in the context of basin development and hydrocarbon prospectivity.

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Baffin Bay

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BBB: Baffin Bay Basin; BBV: Baffin Bay Volcanics; CB:Carey Basin; KB: Kivioq Basin; KR: Kivioq Ridge; KYB: Kap York Basin; MBG: Melville Bay Graben; MBR: Melville Bay Ridge; NB: Nuussuaq Basin; SB: Steensby Basin; UB: Upernavik Basin; UE: Upernavik Escarpment; WGV: West Greenland Volcanics; Hatched area: Volcanics of the WGV near seabed.

Baffin Bay and the surrounding regions

Gre

gers

en e

t al.,

201

3

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Dataset and Methodology2D Seismic Survey conducted in the region from 1992 to 2009.

Gregersen et al., 2013

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Magnetic anomaly data from the Geological Survey of Canada.

Gregersen et al., 2013

Dataset and Methodology

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Gravity data from the Danish National Space Center.

Gregersen et al., 2013

Dataset and Methodology

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• The nearest wells are 100’s of km from the study region and cross major tectonic boundaries and volcanic. Thus, it is unreasonable to establish seismic ties to these wells.

• Approximated constraints on age of the various units are placed based on the regional geology which is sufficiently well established.

• The interpretation of structures and basins is based on a combination of seismic section, gravity and magnetic data.

• Depth conversion is complicated by a lack of velocity information.

• To estimate depths, the final seismic migration velocities provided by TGS-Nopec survey were used.

Dataset and Methodology

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Gre

gers

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t al.,

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3ABC

D

E

F

G

H

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Results and discussionG

rege

rsen

et a

l., 2

013

Strong reflection is interpreted as the top basalt.

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Results and discussionG

rege

rsen

et a

l., 2

013

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Results and discussionG

rege

rsen

et a

l., 2

013

- Melville Bay Ridge. - Reverse phase of seabed (soft-kicks).

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Results and discussionG

rege

rsen

et a

l., 2

013

a. Mound in basinb. Prograding reflection.

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Results and discussionG

rege

rsen

et a

l., 2

013

a. Trough at highsb. Prograding reflection.

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Results and discussionG

rege

rsen

et a

l., 2

013

Isochore map for unit F

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Results and discussionG

rege

rsen

et a

l., 2

013

Isochore map for unit G

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Results and discussionG

rege

rsen

et a

l., 2

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Prospective map of the depth (with respect to sea level) to horizon F1

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Conclusion• Mapping and analysis of the northeastern Baffin Bay region show deep

basin separated by large structural heighs.

• Results show the highs likely developed during Cretaceous rifting followed by compressional tectonic during Paleogene.

• Seismic facies mapping indicates the possible presence of mass flows, fans, canyons/channels and extensive mudstone section.

• Several large potential trap types related to rifting blocks, compressional ridges and drapes.

• All components of a working petroleum system are found in the wider region, but lack of stratigraphic well control hampers proper risk assessment in the study area.

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Yemen- Jabal an-Nabi Shu'aib, 3670m15° 16 45″ N, 43° 58 33″ E′ ′

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ReferenceGregersen, U., Hopper, J. R., & Knutz, P. C. (2013). Basin seismic stratigraphy and aspects of

prospectivity in the NE Baffin Bay, Northwest Greenland. Marine and Petroleum Geology, 46, 1-18.