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Diagenetic Patterns and Pore Space Distribution along a Platform to Outer-Shelf Transect (Urgonian Limestone, Barremian-Aptian, SE France)

Philippe Léonide¹^,², François Fournier², Jean Borgomano², and John Reijmer¹
¹VU University Amsterdam, The Netherlands
²CEREGE, Aix-Marseille Université, France

The reservoir-scale stratigraphic anatomy and the diagenesis of a Barremian-Aptian carbonate platform (Mont-de-Vaucluse, South-East France) is based on 1) high-resolution measured sections in outcrops, 2) detailed microfacies analyses, 3) paleoenvironmental interpretations, 4) biostratigraphy, 5) sequence stratigraphic interpretations, 6) diagenetical and geochemical analyses.

An outcrop study based on high-resolution stratigraphical and sedimentological analyses of the Urgonian carbonate platform of the Monts-de-Vaucluse area (Late Barremian - Early Aptian) allows us to reconstruct a high resolution stratigraphic architecture of the outer platform.

Vertical and lateral compartimentalization of porous versus tight units exists within the platform and is related to early diagenesis associated with the major sequence boundaries.

Early cementation (associated to sequence boundaries) seems to have influenced the preservation of tight / microporous units within the sediments of this carbonate platform.

Petrographical, diagenetic and isotope geochemistry analyses of the Urgonian limestone established the link between pore type distributions, micrite diagenetic pattern and sequence stratigraphy in dominated-microporous carbonates reservoir analogues.

AAPG Search and Discovery Article #120034©2012 AAPG Hedberg Conference Fundamental Controls on Flow in Carbonates, Saint-Cyr Sur Mer, Provence, France, July 8-13, 2012