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S.B. Nielsen

RMSRo: A vitrinite reflectance model consistent with the temperature-apatite fission track system

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Geophysical Research Abstracts
Vol. 16, EGU2014-12484, 2014
EGU General Assembly 2014
© Author(s) 2014. CC Attribution 3.0 License.
RMSRo: A vitrinite reflectance model consistent with the
temperature-apatite fission track system
Søren B. Nielsen, Ole R. Clausen, and Eoin D. McGregor
Department of Geoscience, Høegh-Guldbergsgade 2, 8000 Aarhus C, Denmark
Observed temperature, vitrinite reflectance and apatite fission tracks provide different but related information
regarding temperature history. Their combined use in borehole heat flow determination as well as thermal and
tectonic reconstruction requires a set of predictive models which are internally consistent. While the temperature-
fission track system seems well-calibrated, several different vitrinite reflectance models exist. Although variability
in vitrinite reflectance values is related to natural variations in the organic material such as; initial composition,
depositional environment, degree of oxygenation etc., the most important factor affecting the construction of
vitrinite reflectance models is bias in the geological temperature history of the samples used for calibration. Here
we add to the vitrinite reflectance calibration data set of Suggate (1998) with more borehole data and construct a
kinetic vitrinite reflectance model by minimizing the root mean square (RMS) distance between the calibration
data set and model predictions. We validate this kinetic model on wells in the North Sea which have maximum
temperature at the present day, and on two wells in the eastern North Sea, which have experience cooling since
the early Eocene thermal maximum. The two latter wells have unusually high quality temperature, vitrinite
reflectance and fission track data, and it appears that the independently derived RMSRo-model is consistent with
the temperature-apatite fission track system.
Keywords: vitrinite reflectance, basin analysis, thermal history, hydrocarbon exploration, apatite fission tracks
Suggate, R.P., 1998. Relations between depth of burial, vitrinite reflectance and geothermal gradient. Jour-
nal of Petroleum Geology, v. 21(1), January 1998, 5-32.
Original languageEnglish
Article numberEGU2014-12484
JournalGeophysical Research Abstracts
Volume16
Number of pages1
ISSN1029-7006
Publication statusPublished - 27 Apr 2014
EventEGU General Assembly 2014 - Vienna, Austria
Duration: 27 Apr 20142 May 2014

Conference

ConferenceEGU General Assembly 2014
CountryAustria
CityVienna
Period27/04/201402/05/2014

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