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SUMMARY:Reservoir architectures of flood basalt systems - a 3D Reservoir a
 rchitectures of interlava systems - a 3D photogrammetric study of Eocene c
 liff sections\, Faroe Islands - Simon Passey\, CASP
DTSTART:20141028T160000Z
DTEND:20141028T170000Z
UID:TALK54714@talks.cam.ac.uk
CONTACT:John Maclennan
DESCRIPTION:A need for suitable intra-volcanic analogues to elucidate\, fo
 r example\, reservoir architectures has arisen following the Rosebank disc
 overy in the Faroe-Shetland Basin\, NE Atlantic. The Faroe Islands\, situa
 ted ~160-190 km NW of this discovery\, are an exposed remnant of the Palae
 ogene lava field host and the near-vertical cliff sections afford the oppo
 rtunity to map lateral variations over many kilometres and delineate poten
 tial reservoir architectures. This was achieved by acquiring high-resoluti
 on (~21 megapixels) full frame (36 x 24 mm CMOS Sensor) photographs taken 
 from a helicopter and then analysed using a 3D stereo-plotter coupled with
  stereo-mirror technology in a geographic information system (GIS). The st
 udy focussed on the interval spanning the ~6 m thick Argir Beds\, a volcan
 iclastic overbank-fluvial sequence and stratigraphic marker unit within th
 e Enni Formation. The formation is dominated by a mixture of simple and co
 mpound lava flows commonly separated by minor volcaniclastic units. The an
 alysis of the cliff sections record important information for the estimati
 on of reservoir geometry\, connectivity and compartmentalisation of interl
 ava reservoir systems. This includes\, for example\, the wedging out of la
 va flows over several kilometres and the merging of interlava units. The i
 dentification of major channels\, up to 45 m deep and 180 m wide\, filled 
 with volcaniclastic conglomerates and/or lava flows has implications for t
 he role of sedimentation across the lava field. The vertical connectivity 
 and compartmentalisation of the interlava units is inferred by the presenc
 e of dykes\, fractures\, reverse faults and lava tubes. Furthermore\, more
  than 70 km of mapped horizons are stored in a GIS database that can be us
 ed for 3D modelling using\, for example\, Petrel reservoir engineering sof
 tware.\n\nSuggested Reading\n\nDueholm\, K.S. & Olsen\, T. 1993. Reservoir
  analog studies using multimodel photogrammetry\; a new tool for the petro
 leum industry. American Association of Petroleum Geologists Bulletin\, 77\
 , 2023-2031.\n\nEllis\, D.\, Passey\, S.R.\, Jolley\, D.W. & Bell\, B.R. 2
 009. Transfer zones: The application of new geological information from th
 e Faroe Islands applied to the offshore exploration of intra basalt and su
 b-basalt exploration. In: Varming\, T. & Ziska\, H. (eds). Faroe Islands E
 xploration Conference: Proceedings of the 2nd Conference. Annales Societat
 is Scientiarum Færoensis\, Tórshavn\, 50\, 205-226.\n\nPassey\, S. & Hit
 chen\, K. 2011. Cenozoic (igneous). In: Ritchie\, J.D.\, Ziska\, H.\, John
 son\, H. & Evans\, D. (eds). Geology of the Faroe-Shetland Basin and adjac
 ent areas. British Geological Survey & Jarðfeingi Research Report\, RR/11
 /01\, 209-228.\n\nPassey\, S.R. & Bell\, B.R. 2007. Morphologies and empla
 cement mechanisms of the lava flows of the Faroe Islands Basalt Group\, Fa
 roe Islands\, NE Atlantic Ocean. Bulletin of Volcanology\, 70\, 139-156.\n
 \nPassey\, S.R. & Jolley\, D.W. 2009. A revised lithostratigraphic nomencl
 ature for the Palaeogene Faroe Islands Basalt Group\, NE Atlantic Ocean. E
 arth and Environmental Science Transactions of the Royal Society of Edinbu
 rgh\, 99\, 127-158.\n\nVosgerau\, H.\, Guarnieri\, P.\, Weibel\, R.\, Lars
 en\, M.\, Dennehy\, C.\, Sørensen\, E.V. & Knudsen\, C. 2010. Study of a 
 Palaeogene intrabasaltic sedimentary unit in southern East Greenland: from
  3-D photogeology to micropetrography. In: Bennike\, O.\, Garde\, A.A. & W
 att\, W.S. (eds). Review of Survey activities 2009. Geological Survey of D
 enmark and Greenland Bulletin\, 20\, 75-78.\n
LOCATION:Harker 1 seminar room\, Department of Earth Sciences
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