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Description
This study investigates the dynamics of reactive CO₂ transport in carbonate rock, emphasizing the effects of carbonic acid-induced formation damage. We provide real-time visualizations of these processes using 4D high-resolution synchrotron imaging at the I13 beamline at Diamond Light Source. The research captures and quantifies the temporal effects of reactive CO₂ transport at the pore scale in carbonate rock. During the experiment, CO₂-saturated brine was injected into the sample for 5 hours, with 12 images acquired to monitor different stages of chemical dissolution. The fluid was injected at 0.04 ml/min under 8 MPa pressure and 50°C conditions, simulating rapid flow in the near-wellbore region. Image analysis reveals a channelized dissolution pattern accompanied by a gradual increase in porosity due to changes in the pore structure. Pore network models derived from segmented images were used for drainage and imbibition simulations, which indicated a reduction in capillary entry pressure as pore connectivity increased post-dissolution. Additionally, trapping efficiency was quantified, revealing a slight decline with dissolution as pores widened and became more interconnected.
| Country | United Kingdom |
|---|---|
| Water & Porous Media Focused Abstracts | This abstract is related to Water |
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