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The nature and age of basement host rocks and fissure fills in the Lancaster field fractured reservoir, West of Shetland

Holdsworth, R E; Holdsworth, R.E.; Trice, R.; Hardman, K.; Mccaffrey, K J W; McCaffrey, K.J.W.; Morton, A.; Frei, D.; Dempsey, E.; Bird, A.; Rogers, S.

Authors

R E Holdsworth

R.E. Holdsworth

R. Trice

K. Hardman

K J W Mccaffrey

K.J.W. McCaffrey

A. Morton

D. Frei

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Dr Eddie Dempsey E.Dempsey@hull.ac.uk
Lecturer in Structural Geology, Programme Director (Geology and GPG)

S. Rogers



Abstract

Hosting up to 3.3 billion barrels of oil in place, the upfaulted Precambrian 16 crystalline rocks of the Lancaster Field, offshore west of Shetland, give key insights into how 17 fractured hydrocarbon reservoirs can form in such old rocks. The Neoarchaean (ca 2700-18 2740 Ma) charnockitic basement is cut by deeply penetrating oil-, mineral-and sediments-19 filled fissure systems seen in geophysical and production logs, and thin sections of core. 20 Mineral textures and fluid inclusion geothermometry suggest that a low temperature (

Journal Article Type Article
Journal Journal of the Geological Society
Print ISSN 0016-7649
Electronic ISSN 2041-479X
Publisher Geological Society
Peer Reviewed Peer Reviewed
Pages jgs2019-142
APA6 Citation Holdsworth, R., Trice, R., Hardman, K., McCaffrey, K., Morton, A., Frei, D., …Rogers, S. (in press). The nature and age of basement host rocks and fissure fills in the Lancaster field fractured reservoir, West of Shetland. Journal of the Geological Society, jgs2019-142. https://doi.org/10.1144/jgs2019-142
DOI https://doi.org/10.1144/jgs2019-142
Keywords Geology

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