Dolomitization Processes in Hydrocarbon Reservoirs: Insight from Geothermometry Using Clumped Isotopes

Clumped isotopes geothermometry was applied to two dolomitic hydrocarbon reservoirs. Results indicate that late burial dolomitization occurred at ∼110 °C in the Albian Pinda dolostone (offshore Angola) and ∼90 °C in the Mano-Meillon dolostone (Aquitaine Basin, France), and did not continue on during subsequent burial/thermal evolution to present-day conditions (150-160 °C). This study illustrates the great potential of the clumped isotopes approach to help unravel dolomitization processes in hydrocarbon reservoirs.