Source rock maturation owing to igneous intrusion in rifted margin petroleum systems

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Abstract

Intrusive and extrusive volcanism is a common feature associated with many sedimentary basins formed along rifted margins. As a result, igneous intrusions are often found in potential hydrocarbon-producing source rock horizons. Although direct thermal effects on source rocks have been studied in detail, few studies have dealt with understanding the thermal effects on source rocks across a range of different thermal histories prior to intrusion. The metamorphic aureoles of three intrusions have been characterized for source rock maturation using organic geochemistry and Raman spectroscopy. Results show that a unique combination of organic geochemical and Raman spectroscopic techniques adds further insight to intrusion and host rock interactions, with an effective oil window and extended gas window located in the aureole of an immature and mature source rock respectively. Such varied and potentially beneficial geochemical responses further the need to re-evaluate source rock intervals in rifted margin basins.
Original languageEnglish
Pages (from-to)979-987
Number of pages9
JournalJournal of the Geological Society
Volume174
Issue number6
Early online date11 Jul 2017
DOIs
Publication statusPublished - Nov 2017

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source rock
maturation
petroleum
temperature effect
organic geochemistry
aureole
Raman spectroscopy
sedimentary basin
host rock
volcanism
hydrocarbon
oil
history
gas
basin

Cite this

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title = "Source rock maturation owing to igneous intrusion in rifted margin petroleum systems",
abstract = "Intrusive and extrusive volcanism is a common feature associated with many sedimentary basins formed along rifted margins. As a result, igneous intrusions are often found in potential hydrocarbon-producing source rock horizons. Although direct thermal effects on source rocks have been studied in detail, few studies have dealt with understanding the thermal effects on source rocks across a range of different thermal histories prior to intrusion. The metamorphic aureoles of three intrusions have been characterized for source rock maturation using organic geochemistry and Raman spectroscopy. Results show that a unique combination of organic geochemical and Raman spectroscopic techniques adds further insight to intrusion and host rock interactions, with an effective oil window and extended gas window located in the aureole of an immature and mature source rock respectively. Such varied and potentially beneficial geochemical responses further the need to re-evaluate source rock intervals in rifted margin basins.",
author = "Muirhead, {D. K.} and Bowden, {S. A.} and J. Parnell and N. Schofield",
note = "We gratefully acknowledge A. Saunders and H. Svensen for their constructive reviews.",
year = "2017",
month = "11",
doi = "10.1144/jgs2017-011",
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pages = "979--987",
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publisher = "Geological Society of London",
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TY - JOUR

T1 - Source rock maturation owing to igneous intrusion in rifted margin petroleum systems

AU - Muirhead, D. K.

AU - Bowden, S. A.

AU - Parnell, J.

AU - Schofield, N.

N1 - We gratefully acknowledge A. Saunders and H. Svensen for their constructive reviews.

PY - 2017/11

Y1 - 2017/11

N2 - Intrusive and extrusive volcanism is a common feature associated with many sedimentary basins formed along rifted margins. As a result, igneous intrusions are often found in potential hydrocarbon-producing source rock horizons. Although direct thermal effects on source rocks have been studied in detail, few studies have dealt with understanding the thermal effects on source rocks across a range of different thermal histories prior to intrusion. The metamorphic aureoles of three intrusions have been characterized for source rock maturation using organic geochemistry and Raman spectroscopy. Results show that a unique combination of organic geochemical and Raman spectroscopic techniques adds further insight to intrusion and host rock interactions, with an effective oil window and extended gas window located in the aureole of an immature and mature source rock respectively. Such varied and potentially beneficial geochemical responses further the need to re-evaluate source rock intervals in rifted margin basins.

AB - Intrusive and extrusive volcanism is a common feature associated with many sedimentary basins formed along rifted margins. As a result, igneous intrusions are often found in potential hydrocarbon-producing source rock horizons. Although direct thermal effects on source rocks have been studied in detail, few studies have dealt with understanding the thermal effects on source rocks across a range of different thermal histories prior to intrusion. The metamorphic aureoles of three intrusions have been characterized for source rock maturation using organic geochemistry and Raman spectroscopy. Results show that a unique combination of organic geochemical and Raman spectroscopic techniques adds further insight to intrusion and host rock interactions, with an effective oil window and extended gas window located in the aureole of an immature and mature source rock respectively. Such varied and potentially beneficial geochemical responses further the need to re-evaluate source rock intervals in rifted margin basins.

U2 - 10.1144/jgs2017-011

DO - 10.1144/jgs2017-011

M3 - Article

VL - 174

SP - 979

EP - 987

JO - Journal of the Geological Society

JF - Journal of the Geological Society

SN - 0016-7649

IS - 6

ER -