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Related Experiment Video

Updated: Sep 2, 2025

Dynamic Pore-scale Reservoir-condition Imaging of Reaction in Carbonates Using Synchrotron Fast Tomography

Dynamic Pore-scale Reservoir-condition Imaging of Reaction in Carbonates Using Synchrotron Fast Tomography

Published on: February 21, 2017

Probing multiscale dissolution dynamics in natural rocks through microfluidics and compositional analysis.

Bowen Ling¹, Mo Sodwatana¹, Arjun Kohli¹

¹Energy Resources Engineering, Stanford University, Stanford, CA 94305.

Proceedings of the National Academy of Sciences of the United States of America

|August 3, 2022

Summary

This summary is machine-generated.

This study visualizes mineral dissolution in rocks using high-resolution, time-resolved imaging. It reveals how mineral distribution and fluid flow dynamics impact geological processes and subsurface engineering.

Keywords:

dissolution geochemistry microfluidics mineralogy

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Last Updated: Sep 2, 2025

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Reservoir Condition Pore-scale Imaging of Multiple Fluid Phases Using X-ray Microtomography

Reservoir Condition Pore-scale Imaging of Multiple Fluid Phases Using X-ray Microtomography

Published on: February 25, 2015

Area of Science:

Geochemistry
Geology
Material Science

Background:

Mineral dissolution is crucial in geological systems, influencing processes like carbon sequestration and acid injection.
Coupled geochemical reactions, fluid flow, and solute transport are complex, operating across vast timescales.
Existing experimental methods lack the resolution to observe dissolution in heterogeneous, intact rock samples.

Purpose of the Study:

To develop and apply a novel microfluidic platform for visualizing mineral dissolution in real-time.
To investigate the spatiotemporal dynamics of dissolution in shale samples with varying carbonate content.
To understand the impact of mineral heterogeneity on rock strength and fracture evolution.

Main Methods:

Utilized microfluidic cells with thin rock samples for high temporal (100 ms) and spatial resolution imaging.
Injected acidic fluid into eight shale samples (8-86 wt % carbonate).
Characterized pre- and post-reaction microstructures at pore and fracture scales.

Main Results:

Observed real-time dissolution dynamics, including two-phase flow effects.
Demonstrated that nonreactive particle exposure, fracture morphology, and rock strength depend on reactive grain volume and distribution.
Documented changes in the fracture interface across different sample compositions.

Conclusions:

The developed platform enables real-time characterization of geochemical reactions in heterogeneous media.
Findings provide insights into mineral dissolution dynamics relevant to subsurface engineering.
The study offers a method to characterize reactivity parameters in natural samples where porous media effects are significant.