Reactive transport modelling of carbonate cementation in a deep saline aquifer, the Middle Jurassic Oolithe Blanche Formation, Paris Basin, France

Sophie Violette, Pierre Yves Collin, Vincent Lagneau, Fabien Aubertin, Yasin Makhloufi, Rémi Charton, Françoise Bergerat

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)

Abstract

The Oolithe Blanche Formation (Bathonian, Middle Jurassic) is one of the deep saline aquifers of the Paris Basin in France. The spatial distribution of its reservoir properties (porosity, permeability, tortuosity, etc.) is now better known with relatively homogeneous properties, except for some levels in the central part of the basin, where permeability exhibits higher values. This spatial distribution has been correlated with diagenetic events (variability of cementation) and palaeo-fluid flow circulation phases leading to variable cementation. In this paper, numerical simulations of reactive transport are performed. They provide a preliminary quantitative analysis of the Oolithe Blanche Formation, the type of fluids involved, the duration of fluid flow, and the time required to reduce the primary porosity of the Bathonian sediments by 10% due to cementation. Our results from the reactive transport simulations along a flow line, and a parameter sensitivity analysis suggest that diagenesis processes driven by meteoric water recharge do not exclusively cause the 10% decrease in porosity. Other geochemical and hydrogeologic processes must be involved.

Original languageEnglish
Pages (from-to)540-549
Number of pages10
JournalComptes Rendus Geoscience
Volume348
Issue number7
DOIs
Publication statusPublished - 1 Sep 2016

Keywords

  • Carbonates
  • Diagenesis
  • Numerical simulations
  • Palaeo-circulations
  • Permeability
  • Porosity

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