Namibia's offshore area overlies
a series of Mesozoic and Tertiary sedimentary basins that are virtually
unexplored by drilling. To date only seven exploration wells have been
drilled, the first discovering substantial gas reserves at the Kudu
field now undergoing development. The area holds considerable exploration
potential and all open acreage will be offered for licensing in the
3rd Licensing Round, which opens on 1st October 1998.
The recognition of marine oil-prone
source rocks in the Cretaceous gives the area significant oil potential.
Their maturation and hydrocarbon generation histories are however a
critical exploration risk factor.
The distribution of maturity will
depend critically on the relative affects of paleothermal episodes,
due for example to deeper burial prior to uplift and erosion, heat flow
variation or the effects fluid movement. Recognition of such episodes
and measurement of both their timing and affects in terms of maturity
development are therefore a vital part of prospectivity assessment.
This study will, for the first time, provide reliable data on these
important aspects of the evaluation of offshore Namibia .
The project aims to investigate
these problems by direct assessment of the timing and magnitude of paleo-thermal
effects in wells from the offshore region. Rather than relying on theoretical
models, use of AFTA and VR data will allow direct measurement of the
paleo-thermal episodes responsible for maturity development and hydrocarbon
Specific objectives include:
the major thermal episodes affecting the drilled section
quantification of the timing and magnitude of maximum
characterisation of the processes responsible for each
measurement of paleogeothermal gradients
quantitative assessment of timing of maturation of source rock
estimation of the timing and amount of uplift and erosion at
each studied location
recognition of any non-burial related thermal effects, caused
for example by heat flow variation
or fluid movement
regional synthesis of thermal history including history of
maturity development and regional
variation in timing of peak hydrocarbon generation, discussion
of implications for oil and gas
The project is based on 15 new AFTA
and 27 new VR analyses from wells Kudu 9A-3, 2213/6-1 and 2012/13-1
and on published information from the Kudu 9A-2 well and two DSDP sites.
Comprehensive report containing
full details of AFTA and VR data interpretation and a regional synthesis
including discussion of implications for hydrocarbon prospectivity.
All AFTA and VR data plus supporting geological information, together
with discussion of analytical details will be presented. Results will
be presented in an Executive Summary with accompanying summary diagrams
and tables. Discussion of data quality will also be provided.
Supported by NATIONAL PETROLEUM
CORPORATION OF NAMIBIA (NAMCOR)
For further information please contact