Отправлено: 10.11.13 10:09. Заголовок: Case of the Oolithe Blanche Formation

Impact of sedimentology and diagenesis on the petrophysical properties of a tight oolitic carbonate reservoir. The case of the Oolithe
Blanche Formation (Bathonian, Paris Basin, France)
Yasin Makhloufi a, *, Pierre-Yves Collin b, Françoise Bergerat a, Lisa Casteleyn c,
Steven Claes d, Christian David c, Beatriz Menendez c, Fabrice Monna e, Philippe Robion c,
Jean-Pierre Sizun f, Rudy Swennen d, Christophe Rigollet g,

Marine and Petroleum Geology 48 (2013) 323e340

a b s t r a c t
The Oolithe Blanche Formation was studied in three quarries, located at the south-eastern edge of the
Paris Basin (France). Heterogeneities in reservoir properties were assessed through a sedimentological,
diagenetic and petrophysical study. The relationships between depositional settings, diagenesis and
petrophysical properties were analysed using detailed petrographic studies, image analysis, Nano CTscans
and petrophysical measurements.
The carbonate reservoir pore network is mainly controlled by intraparticle microporosity which ensures
the connectivity with interparticle meso- and macroporosity.
Early cementation vs. early compaction processes (mainly grain interpenetration) may have considerable
influence on fluid-flow properties and parameters such as permeability, acoustic velocities and
tortuosity. Better reservoir properties are found when compaction processes begin before cementation.
From statistical analyses, e.g. Principal Component Analysis and Linear Discriminant Analysis, a
sedimentological/diagenetic and petrophysical model is proposed that is in a good agreement with the
geological model developed from field work.