Role of limestone micro-porosity on dissolution patterns during reactive transport with carbonated water
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2025
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| _version_ | 1866902113715486720 |
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| author | Mascle, Matthieu Deschamps, Hervé Nader, Fadi |
| author_facet | Mascle, Matthieu Deschamps, Hervé Nader, Fadi |
| contents | <p><span>In this work, we have investigated the effect of two different limestone textures (namely Lavoux<br>and Euville limestone) on the reactive transport. These two rock-types have a similar chemical composition<br>(pure calcite) but differ by their macro- and micro-structures. An extensive workflow of experiments has<br>been carried out to characterize the macro- and micro-porous systems of the cores, and to understand the<br>interaction between the different properties that are relevant for the reactive transport. It includes 5 µm pixel<br>resolution 3D scans of the cores and miscible tracer injections conducted before and after the alteration.<br>Core alteration has been conducted using carbonated water to be more representative of CO</span><span>2 </span><span>storage<br>conditions. Experiments have been conducted at ambient temperature (25°C) and at 10 bar of pore pressure.<br>Results have shown that Lavoux limestone has higher micro-porosity and better-connected grains than<br>Euville limestone. Mass transfer of the reactive fluid in the micro-porosity, where most of the reactive<br>surfaces are, is limited for Euville. Consequently, Lavoux limestone showed a more homogeneous and<br>sustained dissolution front, while Euville developed early breakthrough and localized. The two cores initial<br>flow properties have been altered to a completely different extent. The absolute permeability has been<br>multiplied by more than 100 for Euville core, while it has been increased by less than 2 for Lavoux core.</span> </p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_16813518 |
| institution | Zenodo |
| language | eng |
| publishDate | 2025 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Role of limestone micro-porosity on dissolution patterns during reactive transport with carbonated water Mascle, Matthieu Deschamps, Hervé Nader, Fadi 2025 SCA Oral Displacement Mechanisms, EOR, IOR & Reactive Transport <p><span>In this work, we have investigated the effect of two different limestone textures (namely Lavoux<br>and Euville limestone) on the reactive transport. These two rock-types have a similar chemical composition<br>(pure calcite) but differ by their macro- and micro-structures. An extensive workflow of experiments has<br>been carried out to characterize the macro- and micro-porous systems of the cores, and to understand the<br>interaction between the different properties that are relevant for the reactive transport. It includes 5 µm pixel<br>resolution 3D scans of the cores and miscible tracer injections conducted before and after the alteration.<br>Core alteration has been conducted using carbonated water to be more representative of CO</span><span>2 </span><span>storage<br>conditions. Experiments have been conducted at ambient temperature (25°C) and at 10 bar of pore pressure.<br>Results have shown that Lavoux limestone has higher micro-porosity and better-connected grains than<br>Euville limestone. Mass transfer of the reactive fluid in the micro-porosity, where most of the reactive<br>surfaces are, is limited for Euville. Consequently, Lavoux limestone showed a more homogeneous and<br>sustained dissolution front, while Euville developed early breakthrough and localized. The two cores initial<br>flow properties have been altered to a completely different extent. The absolute permeability has been<br>multiplied by more than 100 for Euville core, while it has been increased by less than 2 for Lavoux core.</span> </p> |
| title | Role of limestone micro-porosity on dissolution patterns during reactive transport with carbonated water |
| topic | 2025 SCA Oral Displacement Mechanisms, EOR, IOR & Reactive Transport |
| url | https://doi.org/10.5281/zenodo.16813518 |