Late palaeozoic hydrocarbon migration through the Clair field, West of Shetland, UK Atlantic margin

Darren F. Mark, Paul F. Green, John Parnell, Simon P. Kelley, Martin R. Lee, Sarah C. Sherlock

Research output: Contribution to journalLiterature review

17 Citations (Scopus)

Abstract

Geochemical analysis of bitumen- and hydrocarbon-bearing fluid inclusions from the Devonian-Carboniferous Clair field indicates that the reservoirs contain a mixture of oils from different marine and lacustrine sources. Reconstruction of the Clair field oil-charge history using fluid inclusion petrography show that oil-charging occurred at times of K-feldspar, quartz and calcite cementation. Temperature-composition-time data yielded from the integration of fluid inclusion microthermometry with high-resolution Ar-Ar dating, date hydrocarbon-bearing K-feldspar overgrowths at 247 +/- 3.3 Ma. These data show that in order for oil to be trapped within primary fluid inclusions in K-feldspar overgrowths, hydrocarbon migration throughout the UK Atlantic margin must have been taking place during the Late Palaeozoic and as such, current industry oil-play models based solely on oil charging from Jurassic-Cretaceous marine sources are clearly incomplete and need revision. Apatite fission track analysis and vitrinite reflectance data were used to reconstruct thermal burial histories and assess potential oil generation from Middle Devonian lacustrine source rocks. Thermal history data from wells along The Rona Ridge adjacent to the Clair field show that the Palaeozoic section was heated to greater than 100 degrees C at some time between 270 and 230 Ma, confirming that Devonian source rocks were mature and expelling oil during the Late Palaeozoic at the time that authigenic K-feldspar overgrowths were growing in the Clair field. (C) 2008 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)2510-2533
Number of pages24
JournalGeochimica et Cosmochimica Acta
Volume72
Issue number10
DOIs
Publication statusPublished - 15 May 2008

Keywords

  • Devonian lacustrine sediments
  • authigenic k-feldspar
  • Inner Moray Firth
  • fluid inclusions
  • quartz-cementation
  • thermal history
  • North-Sea
  • petroleum migration
  • fluorescence colors
  • United-Kingdom

Cite this

Late palaeozoic hydrocarbon migration through the Clair field, West of Shetland, UK Atlantic margin. / Mark, Darren F.; Green, Paul F.; Parnell, John; Kelley, Simon P.; Lee, Martin R.; Sherlock, Sarah C.

In: Geochimica et Cosmochimica Acta, Vol. 72, No. 10, 15.05.2008, p. 2510-2533.

Research output: Contribution to journalLiterature review

Mark, Darren F. ; Green, Paul F. ; Parnell, John ; Kelley, Simon P. ; Lee, Martin R. ; Sherlock, Sarah C. / Late palaeozoic hydrocarbon migration through the Clair field, West of Shetland, UK Atlantic margin. In: Geochimica et Cosmochimica Acta. 2008 ; Vol. 72, No. 10. pp. 2510-2533.
@article{919f4ea97ad84574bebd5d652f403734,
title = "Late palaeozoic hydrocarbon migration through the Clair field, West of Shetland, UK Atlantic margin",
abstract = "Geochemical analysis of bitumen- and hydrocarbon-bearing fluid inclusions from the Devonian-Carboniferous Clair field indicates that the reservoirs contain a mixture of oils from different marine and lacustrine sources. Reconstruction of the Clair field oil-charge history using fluid inclusion petrography show that oil-charging occurred at times of K-feldspar, quartz and calcite cementation. Temperature-composition-time data yielded from the integration of fluid inclusion microthermometry with high-resolution Ar-Ar dating, date hydrocarbon-bearing K-feldspar overgrowths at 247 +/- 3.3 Ma. These data show that in order for oil to be trapped within primary fluid inclusions in K-feldspar overgrowths, hydrocarbon migration throughout the UK Atlantic margin must have been taking place during the Late Palaeozoic and as such, current industry oil-play models based solely on oil charging from Jurassic-Cretaceous marine sources are clearly incomplete and need revision. Apatite fission track analysis and vitrinite reflectance data were used to reconstruct thermal burial histories and assess potential oil generation from Middle Devonian lacustrine source rocks. Thermal history data from wells along The Rona Ridge adjacent to the Clair field show that the Palaeozoic section was heated to greater than 100 degrees C at some time between 270 and 230 Ma, confirming that Devonian source rocks were mature and expelling oil during the Late Palaeozoic at the time that authigenic K-feldspar overgrowths were growing in the Clair field. (C) 2008 Elsevier Ltd. All rights reserved.",
keywords = "Devonian lacustrine sediments, authigenic k-feldspar, Inner Moray Firth, fluid inclusions, quartz-cementation, thermal history, North-Sea, petroleum migration, fluorescence colors, United-Kingdom",
author = "Mark, {Darren F.} and Green, {Paul F.} and John Parnell and Kelley, {Simon P.} and Lee, {Martin R.} and Sherlock, {Sarah C.}",
year = "2008",
month = "5",
day = "15",
doi = "10.1016/j.gca.2007.11.037",
language = "English",
volume = "72",
pages = "2510--2533",
journal = "Geochimica et Cosmochimica Acta",
issn = "0016-7037",
publisher = "PERGAMON-ELSEVIER SCIENCE LTD",
number = "10",

}

TY - JOUR

T1 - Late palaeozoic hydrocarbon migration through the Clair field, West of Shetland, UK Atlantic margin

AU - Mark, Darren F.

AU - Green, Paul F.

AU - Parnell, John

AU - Kelley, Simon P.

AU - Lee, Martin R.

AU - Sherlock, Sarah C.

PY - 2008/5/15

Y1 - 2008/5/15

N2 - Geochemical analysis of bitumen- and hydrocarbon-bearing fluid inclusions from the Devonian-Carboniferous Clair field indicates that the reservoirs contain a mixture of oils from different marine and lacustrine sources. Reconstruction of the Clair field oil-charge history using fluid inclusion petrography show that oil-charging occurred at times of K-feldspar, quartz and calcite cementation. Temperature-composition-time data yielded from the integration of fluid inclusion microthermometry with high-resolution Ar-Ar dating, date hydrocarbon-bearing K-feldspar overgrowths at 247 +/- 3.3 Ma. These data show that in order for oil to be trapped within primary fluid inclusions in K-feldspar overgrowths, hydrocarbon migration throughout the UK Atlantic margin must have been taking place during the Late Palaeozoic and as such, current industry oil-play models based solely on oil charging from Jurassic-Cretaceous marine sources are clearly incomplete and need revision. Apatite fission track analysis and vitrinite reflectance data were used to reconstruct thermal burial histories and assess potential oil generation from Middle Devonian lacustrine source rocks. Thermal history data from wells along The Rona Ridge adjacent to the Clair field show that the Palaeozoic section was heated to greater than 100 degrees C at some time between 270 and 230 Ma, confirming that Devonian source rocks were mature and expelling oil during the Late Palaeozoic at the time that authigenic K-feldspar overgrowths were growing in the Clair field. (C) 2008 Elsevier Ltd. All rights reserved.

AB - Geochemical analysis of bitumen- and hydrocarbon-bearing fluid inclusions from the Devonian-Carboniferous Clair field indicates that the reservoirs contain a mixture of oils from different marine and lacustrine sources. Reconstruction of the Clair field oil-charge history using fluid inclusion petrography show that oil-charging occurred at times of K-feldspar, quartz and calcite cementation. Temperature-composition-time data yielded from the integration of fluid inclusion microthermometry with high-resolution Ar-Ar dating, date hydrocarbon-bearing K-feldspar overgrowths at 247 +/- 3.3 Ma. These data show that in order for oil to be trapped within primary fluid inclusions in K-feldspar overgrowths, hydrocarbon migration throughout the UK Atlantic margin must have been taking place during the Late Palaeozoic and as such, current industry oil-play models based solely on oil charging from Jurassic-Cretaceous marine sources are clearly incomplete and need revision. Apatite fission track analysis and vitrinite reflectance data were used to reconstruct thermal burial histories and assess potential oil generation from Middle Devonian lacustrine source rocks. Thermal history data from wells along The Rona Ridge adjacent to the Clair field show that the Palaeozoic section was heated to greater than 100 degrees C at some time between 270 and 230 Ma, confirming that Devonian source rocks were mature and expelling oil during the Late Palaeozoic at the time that authigenic K-feldspar overgrowths were growing in the Clair field. (C) 2008 Elsevier Ltd. All rights reserved.

KW - Devonian lacustrine sediments

KW - authigenic k-feldspar

KW - Inner Moray Firth

KW - fluid inclusions

KW - quartz-cementation

KW - thermal history

KW - North-Sea

KW - petroleum migration

KW - fluorescence colors

KW - United-Kingdom

U2 - 10.1016/j.gca.2007.11.037

DO - 10.1016/j.gca.2007.11.037

M3 - Literature review

VL - 72

SP - 2510

EP - 2533

JO - Geochimica et Cosmochimica Acta

JF - Geochimica et Cosmochimica Acta

SN - 0016-7037

IS - 10

ER -