NORTH OF SHETLANDS
study of the thermal and tectonic development and the hydrocarbon generation
history using AFTA®
and vitrinite reflectance
The thermal history
of the Mesozoic and Tertiary section and its effects on maturity development
and oil generation are factors which are critical to the prediction
of hydrocarbons on the Atlantic margin north of the Shetland Islands.
Geotrack's studies in the West of Shetlands, Rockall Trough and West
of Scotland regions have shown that the basins on the Atlantic margin
have experienced multiple thermal episodes throughout their histories
and have highlighted the importance of knowing which episodes were responsible
for causing maturity in order to determine the relation between generation
and the timing of trap formation. This work also revealed that contrary
to conventional concepts, the Tertiary igneous activity and associated
fluid movement has contributed significantly to source rock maturity
over wide regions. Investigation of these effects will be a key aim
of the North of Shetlands project.
- Identify the significant thermal
episodes which have influenced maturity development in the region,
quantify their effects and delineate their regional extent.
- Construct a regional thermal
history framework within which the history of potential source maturation
and hydrocarbon generation can be understood.
- Provide quantitative constraints
for basin modelling.
- Identify the causes of the major
episodes of heating and cooling.
- Assess both the regional effects
of burial, uplift/erosion, heat flow variation etc and the anticipated
effects of heating due to intrusion and hot fluid movement associated
with the Tertiary igneous activity.
- New AFTA and vitrinite reflectance work on samples from
approximately 13 wells. The study wells include:
219/20-1 219/27-1 219/28-1 219/28-2
210/4-1 210/5-1 209/3-1 209/4-1 209/6-1 209/12-1 208/15-1 208/17-1 208/19-1
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