Potential of palaeofluid analysis for understanding oil charge history

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

Fluid inclusion data, particularly the distribution of hydrocarbon fluid inclusions and their chemistry, can provide insights into oil charge in a petroleum-prospective region. Examples from the UK Atlantic margin show how we can understand thermal regime, timing and chemistry of oil charge. Data from the UK Atlantic margin based on fluid inclusion temperature profiles shows anomalously high temperatures which are highest at the top of the Triassic-Eocene sequence. This is interpreted as a product of hot fluid flow, probably reflecting hydrothermal activity related to intrusion of sills at depth. The preservation of high temperatures also implies rapid migration from depth through fracture systems. Ar-Ar analysis of oil-bearing K-feldspar cements, and petrographic studies of oil inclusion distribution help delimit timing and migration pathways for the hot fluid charge and later fluid migration events. Coupled with compositional data for oils measured destructively (organic geochemistry) or non-destructively (fluorescence), these approaches allow the development of oil charge histories based on real data rather than theoretical modelling.

Original languageEnglish
Pages (from-to)73-82
Number of pages10
JournalGeoFluids
Volume10
Issue number1-2
DOIs
Publication statusPublished - May 2010

Keywords

  • Atlantic margin
  • hydrocarbons
  • fluid inclusions
  • sedimentary basins
  • thermal anomalies
  • UK Atlantic margin
  • Hydrocarbon fluid inclusions
  • North-Sea
  • petroleum migration
  • geothermal systems
  • fluorescence lifetime
  • quartz cementation
  • deformation Bands
  • thermal history

Cite this

Potential of palaeofluid analysis for understanding oil charge history. / Parnell, J.

In: GeoFluids, Vol. 10, No. 1-2, 05.2010, p. 73-82.

Research output: Contribution to journalArticle

@article{89b75c8b666b4c66bccf8e11acc26c4f,
title = "Potential of palaeofluid analysis for understanding oil charge history",
abstract = "Fluid inclusion data, particularly the distribution of hydrocarbon fluid inclusions and their chemistry, can provide insights into oil charge in a petroleum-prospective region. Examples from the UK Atlantic margin show how we can understand thermal regime, timing and chemistry of oil charge. Data from the UK Atlantic margin based on fluid inclusion temperature profiles shows anomalously high temperatures which are highest at the top of the Triassic-Eocene sequence. This is interpreted as a product of hot fluid flow, probably reflecting hydrothermal activity related to intrusion of sills at depth. The preservation of high temperatures also implies rapid migration from depth through fracture systems. Ar-Ar analysis of oil-bearing K-feldspar cements, and petrographic studies of oil inclusion distribution help delimit timing and migration pathways for the hot fluid charge and later fluid migration events. Coupled with compositional data for oils measured destructively (organic geochemistry) or non-destructively (fluorescence), these approaches allow the development of oil charge histories based on real data rather than theoretical modelling.",
keywords = "Atlantic margin, hydrocarbons, fluid inclusions, sedimentary basins, thermal anomalies, UK Atlantic margin, Hydrocarbon fluid inclusions, North-Sea, petroleum migration, geothermal systems, fluorescence lifetime, quartz cementation, deformation Bands, thermal history",
author = "J. Parnell",
year = "2010",
month = "5",
doi = "10.1111/j.1468-8123.2009.00268.x",
language = "English",
volume = "10",
pages = "73--82",
journal = "GeoFluids",
issn = "1468-8115",
publisher = "Wiley-Blackwell",
number = "1-2",

}

TY - JOUR

T1 - Potential of palaeofluid analysis for understanding oil charge history

AU - Parnell, J.

PY - 2010/5

Y1 - 2010/5

N2 - Fluid inclusion data, particularly the distribution of hydrocarbon fluid inclusions and their chemistry, can provide insights into oil charge in a petroleum-prospective region. Examples from the UK Atlantic margin show how we can understand thermal regime, timing and chemistry of oil charge. Data from the UK Atlantic margin based on fluid inclusion temperature profiles shows anomalously high temperatures which are highest at the top of the Triassic-Eocene sequence. This is interpreted as a product of hot fluid flow, probably reflecting hydrothermal activity related to intrusion of sills at depth. The preservation of high temperatures also implies rapid migration from depth through fracture systems. Ar-Ar analysis of oil-bearing K-feldspar cements, and petrographic studies of oil inclusion distribution help delimit timing and migration pathways for the hot fluid charge and later fluid migration events. Coupled with compositional data for oils measured destructively (organic geochemistry) or non-destructively (fluorescence), these approaches allow the development of oil charge histories based on real data rather than theoretical modelling.

AB - Fluid inclusion data, particularly the distribution of hydrocarbon fluid inclusions and their chemistry, can provide insights into oil charge in a petroleum-prospective region. Examples from the UK Atlantic margin show how we can understand thermal regime, timing and chemistry of oil charge. Data from the UK Atlantic margin based on fluid inclusion temperature profiles shows anomalously high temperatures which are highest at the top of the Triassic-Eocene sequence. This is interpreted as a product of hot fluid flow, probably reflecting hydrothermal activity related to intrusion of sills at depth. The preservation of high temperatures also implies rapid migration from depth through fracture systems. Ar-Ar analysis of oil-bearing K-feldspar cements, and petrographic studies of oil inclusion distribution help delimit timing and migration pathways for the hot fluid charge and later fluid migration events. Coupled with compositional data for oils measured destructively (organic geochemistry) or non-destructively (fluorescence), these approaches allow the development of oil charge histories based on real data rather than theoretical modelling.

KW - Atlantic margin

KW - hydrocarbons

KW - fluid inclusions

KW - sedimentary basins

KW - thermal anomalies

KW - UK Atlantic margin

KW - Hydrocarbon fluid inclusions

KW - North-Sea

KW - petroleum migration

KW - geothermal systems

KW - fluorescence lifetime

KW - quartz cementation

KW - deformation Bands

KW - thermal history

U2 - 10.1111/j.1468-8123.2009.00268.x

DO - 10.1111/j.1468-8123.2009.00268.x

M3 - Article

VL - 10

SP - 73

EP - 82

JO - GeoFluids

JF - GeoFluids

SN - 1468-8115

IS - 1-2

ER -