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Reservoir architectures of interlava systems: a 3D photogrammetrical study of Eocene cliff sections, Faroe Islands

By
Henrik Vosgerau
Henrik Vosgerau
1
Geological Survey of Denmark and Greenland, Øster Voldgade 10, DK-1350 Copenhagen, Denmark
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Simon R. Passey
Simon R. Passey
2
Jarðfeingi (Faroese Earth and Energy Directorate), Brekkutún 1, PO Box 3059, FO-110 Tórshavn, Faroe Islands
4
Present address: CASP, West Building, 181A Huntingdon Road, Cambridge CB3 0DH, UK
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Kristian Svennevig
Kristian Svennevig
1
Geological Survey of Denmark and Greenland, Øster Voldgade 10, DK-1350 Copenhagen, Denmark
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Max N. Strunck
Max N. Strunck
1
Geological Survey of Denmark and Greenland, Øster Voldgade 10, DK-1350 Copenhagen, Denmark
5
Present address: COWI, Parallelvej 2, DK-2800 Lyngby, Denmark
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David W. Jolley
David W. Jolley
3
Geology & Petroleum Geology, University of Aberdeen, Meston Building, Kings College, Aberdeen AB24 3UE, UK
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Published:
January 01, 2016

Abstract

Following the intra-volcanic Rosebank discovery in the Faroe–Shetland Basin, NE Atlantic, there has been a need to find suitable analogues to characterize reservoir architectures, connectivities and compartmentalization of interlava clastic beds. The Faroe Islands, situated c. 160–190 km to the NW of this discovery, are an exposed remnant of the Palaeogene lava field host and the near-vertical cliff sections afford the opportunity to map lateral variations over many kilometres. This was achieved through 3D photogrammetry based on high-resolution digital photographs taken from a helicopter. The study focused on the Eocene Enni Formation, which is dominated by a mixture of simple and compound lava flows commonly separated by minor volcaniclastic beds, including the widespread Argir Beds. In general, the interlava beds are tabular shaped and <1 to c. 6 m thick. Locally they thicken in depressions formed by the wedging out or differential erosion of underlying lava flow lobes. Connectivity may be caused by the wedging out of successive lava flows leading to the lateral merging of interlava beds or more rarely be hydraulically connected via conglomeratic fills of major channels. Lateral compartmentalization may be caused by the intersection of interlava beds by dykes, lava tubes, lava-filled channels or reverse faults.

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Geological Society, London, Special Publications

The Value of Outcrop Studies in Reducing Subsurface Uncertainty and Risk in Hydrocarbon Exploration and Production

M. Bowman
M. Bowman
Texas A&M University, Qatar
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H. R. Smyth
H. R. Smyth
Neftex Exploration Insights, UK
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T. R. Good
T. R. Good
ExxonMobil, UK
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S. R. Passey
S. R. Passey
CASP, UK
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J. P. P. Hirst
J. P. P. Hirst
Sedimentology Consultant, UK
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C. J. Jordan
C. J. Jordan
British Geological Survey
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Geological Society of London
Volume
436
ISBN electronic:
9781786203090
Publication date:
January 01, 2016

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