OF THE BURIAL, THERMAL AND HYDROCARBON GENERATION HISTORY USING AFTA®
AND VITRINITE REFLECTANCE
with maturity modelling
provided by Dr. Doug Waples
is the last 300 million years to exploration in Oklahoma?
Why is it ignored?
PROPOSED STUDY- PLANNING STAGE
Oklahoma oil and gas fields are interspersed amongst a complex system
of deformed mountain belts, uplifted crystalline basement and enormously
thick foreland basins. There are no units throughout most of the region
any younger than Pennsylvanian in age and for this reason, conventional
studies using the preserved stratigraphy have been unable to answer
questions which are fundamental to exploration:
- When were hydrocarbons
- Were hydrocarbons generated
at different times in different locations?
- Were there subsequent
episodes of heating between Pennsylvanian deposition and the present?
If so, when?
- Are observed structural
relationships related to post-Pennsylvanian events?
- Has trap integrity been
affected by subsequent events?
- Can possible post-Pennsylvanian
events account for differences in oil and gas occurrences across the
- Was there post-Pennsylvanian
deposition which has subsequently been eroded? If so, when and how
- Has post-Pennsylvanian
heating affected reservoir quality? What control can be placed on
This study is
designed to understand the timing of important thermal and tectonic
events which have affected Oklahoma using AFTA and vitrinite reflectance
(VR) data. Samples will be collected from the following regions: Seminole
Arch, Arbuckle Mountains, Ardmore Basin, Wichita Uplift, Anadarko Basin,
Amarillo Uplift and northern regions, including the Sooner Trend (for
further information on sampling strategy, please contact us). AFTA will
provide constraints on the magnitude and timing of various thermal episodes,
and VR data will also be used to constrain the magnitude of maximum
paleotemperature. In addition to selected outcrop localities, AFTA and
VR will be used in key downhole sequences to define the paleogeothermal
gradient, and hence paleo-heatflow, at critical times in the basin's
history. These parameters will vastly improve basin models for the region.
Thermal history constraints provided by Geotrack (AFTA and VR) will
be employed by Dr. Doug Waples, an internationally recognised leader
in basin modelling, to give constrained maturity models which will add
greater confidence and direction for explorationists in the region.
This study will provide practical information about structural and timing
relationships in the region of direct application by companies both
active in the region and those considering taking up acreage.
For further details please contact