OFFSHORE WEST GREENLAND: PHASE 2
THERMAL AND BURIAL HISTORY RECONSTRUCTION IN
SEVEN WELLS BASED ON AFTA AND VR, CONSTRAINED BY
SONIC VELOCITIES AND NEW STRATIGRAPHIC DATA:
Including reassessment of previous work, New results,
integration with regional tectonic framework and
implications for generation and preservation of hydrocarbons
In 1999, Geotrack International Pty Ltd provided
a report for Phillips Petroleum Co. (Geotrack Report #732) describing
Thermal History Reconstruction in six wells located Offshore West Greenland.
The wells are: Hellefisk-1, Ikermiut-1. Kangamiut-1, Nukik-1, Nukik-2
and Gjoa-1 (the latter is located in Canadian waters).
This report has been available on open file from
GEUS (Copenhagen) for some years. Over this time understanding of the
stratigraphy of the offshore region has advanced, additional vitrinite
reflectance (VR) data have become available from GEUS, and one more
well has been drilled offshore. In addition, new information from the
onshore margin, based on integrated AFTA, VR and geomorphological investigations
has led to a more rigorous understanding of the tectonic framework for
the onshore region.
We propose a reassessment of our original study, incorporating this
new information, with input from GEUS personnel, to provide a more
complete description of regional variation in thermal history in the
offshore region and the resulting implications for hydrocarbon prospectivity.
- Revision of stratigraphic data in offshore wells based on recent
Integration of GEUS VR with Geotrack VR in offshore
Reassessment of the thermal history based on
AFTA & VR data in offshore wells from Geotrack Report #732,
including new AFTA data from basement sample in Nukik-1.
Thermal History reconstruction in the Fylla well
(Qulleq-1) based on new AFTA analyses (4 samples) to be undertaken,
combined with available GEUS VR data.
Investigation of possible previous greater depth
of burial based on sonic velocities in the offshore wells and integration
with results based on AFTA and VR data.
Incorporation of results from the onshore Gro-3
Discussion of offshore and onshore results and
regional tectonic evolution.
Discussion of implications for generation and
preservation of hydrocarbons.
Results will be presented in a series of reports, produced and distributed
by Geotrack International.
The reports will include:
a new Geotrack Report presenting all AFTA and
VR data plus interpretations, and thermal and burial and thermal
history reconstructions for each well (with all data presented in
a new GEUS report presenting results and conclusions
of the sonic velocity study
a regional integration report including discussion
of the regional tectonic framework and the implications of the study
for hydrocarbon prospectivity.
Delivery of the final report will be March 1st 2010
The results of the study will allow definition of the timing and
magnitude of the dominant paleo-thermal episodes that have affected
the offshore section. This, in turn, will allow mapping of the influence
of variation in source rock thermal histories on hydrocarbon prospectivity
across the offshore region, allowing definition of more prospective
areas where peak source rock maturation occurred after formation of
The thermal history solutions from AFTA and VR also provide rigorous
constraints for basin modelling, enabling more reliable and accurate
prediction of patterns of hydrocarbon occurrence (although this is
not included in this study).
For further information, contact Paul
Green or Dr Peter Japsen, Geological Survey of Denmark and Greenland
(GEUS), Øster Voldgade 10, DK-1350 Copenhagen K, Denmark.