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A MUltiple Space and Time scale approach for the quAntification of deep saliNe formations for CO2 storaGe

Work package 4 Laboratory experiments and natural analogues

WP leader
CNRS
Participants
UGOE UEDIN FZK

Objectives

This WP aims to produce a comprehensive, self consistent, experimental and field observation data base for validating models. The objective is to support the theoretical improvement of reservoir-scale modeling, including parameter upscaling, by characterizing mass transfer mechanisms and identifying controlling parameters from core-sample scale to reservoir scale. In addition, it aims to parameterize the thermo-hydro-mechanical & chemical - THMC - processes associated with the migration of supercritical and dissolved CO2 in the aquifers and through the seal


Work progress (March 2011)

Main findings, results or achievements so far can be summarized as follows:
  • Laboratory scale investigation of the integrity of the caprock with has been undertaken at UEDIN with the aim to parameterize the thermo-hydro-mechanical and chemical processes associated with the migration of supercritical and dissolved CO2 in the cap rock seal.
  • The tested Heletz cap rock samples have a relatively simple chemical composition
  • Experiments at lab-scale on reservoir rock and cements
    • Percolation benches at CNRS have been improved for better control of the back pressure, by the installation of hydro-pneumatic dumpers and computer-controlled electro-valves. Specific ports dedicated to the analysis of fluid composition (carbon compound speciation), based on Micro-Laser Raman Spectrometer (already purchased) has been installed and successfully tested.
    • Experiments on sandstones (Pretty Hill formation) and carbonates (oolithic, Dogger, Paris basin) reservoir samples as well as well-cements (fractured) have been performed
  • Selection of suitable tracers to identify the spreading of CO2 in the reservoir
  • Samples from selected analogue sites were collected and characterised for use in laboratory ("micro") investigation and macro-, outcrop- and field-scale surveying data was obtained. Analogue sampling, measurements and observations across range of scales is feeding into our thermo-hydro-mechanical-chemical (THMC) coupled processes modelling work.
  • In support to the natural analogues studies, numerical investigation is underway describing the processes leading to CO2 escape from caprocks.
  • At KIT, a new high pressure system called MUSTANG-HP has been designed, constructed and is almost finished.
See pictures...

©Mustang - 2009