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Reservoir condition imaging of reactive transport in heterogeneous carbonates using fast synchrotron tomography — Effect of initial pore structure and flow conditions

DOI: 10.1016/j.chemgeo.2016.02.030 DOI Help

Authors: H. Menke (Imperial College London Department of Earth Science and Engineering) , M. G. Andrew (Imperial College London) , M. J. Blunt (Imperial College London) , B. Bijeljic (Imperial College London Department of Earth Science and Engineering)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Chemical Geology , VOL 428 , PAGES 15 - 26

State: Published (Approved)
Published: June 2016
Diamond Proposal Number(s): 9377

Open Access Open Access

Abstract: We investigate the impact of initial pore structure and velocity field heterogeneity on the dynamics of fluid/solid reaction at high Péclet numbers (fast flow) and low Damköhler number (relatively slow reaction rates). The Diamond Lightsource Pink Beam was used to image dissolution of Estaillades and Portland limestones in the presence of CO2-saturated brine at reservoir conditions (10 MPa and 50 °C representing ~ 1 km aquifer depth) at two flow rates for a period of 2 h. Each sample was scanned between 51 and 94 times at 4.76-μm resolution and the dynamic changes in porosity, permeability, and reaction rate were examined using image analysis and flow modelling.

Journal Keywords: Carbon storage; Carbonate dissolution; Pore-scale; Effective reaction rate; Fast tomography; Micro-CT

Subject Areas: Chemistry

Instruments: I13-2-Diamond Manchester Imaging