Paris Basin: Quantitative Oil Potential
Evaluation
Lepoutre, Manoelle1,
Jean-Marie Masset2, Gerard Sambet3 (1)
Total E&P, Pau, France
(2) Total, Paris, France
(3) Total E&P, Stavanger,
Norway
The onshore Paris Basin is a very mature oil province located in the
Northern part of France,. More than 800 exploration wells have been drilled from
the early 1950’s to the mid 1990’s. Some significant discoveries of around
several millions of barrels have been discovered, the largest and most famous
being Chaunoy, Villeperdue
and Champotran, but most of discoveries were less
than 2Mbl. The ultimate discovered reserves are estimated at around 300 Mbls, split among 3 main reservoirs; the Dogger carbonates, the Keuper
sandstones and dolomites, and the Rhaetian sands.
Some other fields have been found in the Neocomian
sands. Source Rock is the Liassic interval. Relief
features are of very little magnitude. From Early Mesozoic, a progressive tilt
from East to West open the basin to Western and North Western influx resulting
in a variety of lithology, and gentle thickness
variations, regional onlaps, or truncations. An
integrated evaluation succeeded in a qualitative and quantitative petroleum
evaluation of the remaining potential of the basin:
Sequence stratigraphy concepts were
applied with excellent biostratigraphic and log
control, but with insufficient seismic data quality for the necessary
resolution.
A Source Rock potential assessment of
all sedimentary levels, fluid signature and source rock correlation with
geochemical biomarkers, fluid and Source Rock direct maturity.
A complete regional mapping of all key geological intervals
built from a large seismic data base used to understand main structural events,
paleogeography of play horizon, geodynamics and the
migration of hydrocarbon from the kitchen areas to the traps.
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