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Energies
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Environmental Geochemistry: Precipitation and Dissolution in Porous Media
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Environmental Geochemistry: Precipitation and Dissolution in Porous Media

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "H1: Petroleum Engineering".

Deadline for manuscript submissions: closed (20 February 2022) | Viewed by 6122

Special Issue Editor

Dr. Jenna Poonoosamy

E-Mail Website
Guest Editor
Forschungszentrum Jülich (FZJ), 52428 Jülich, Germany
Interests: reactive transport modelling, nucleation; precipitation and dissolution in porous media; crystallization in confinement, radionuclide uptake and retention, solid solution
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Mineral dissolution and precipitation in porous media are relevant processes that occur in the subsurface, e.g., during oil and gas production, ore mining, geothermal energy extraction, CO2 sequestration, or geological disposal of nuclear waste. These processes affect the hydraulic and mechanical properties of the rock matrix. A deep insight into transport-induced mineral precipitation and dissolution is a first step to further improve existing conceptual and numerical reactive transport models and to predict the fate of contaminants in the subsurface.

This Special Issue aims to bring together corresponding studies from all these areas. We welcome research and review studies on:

  • Experimental or theoretical work addressing mineral precipitation and dissolution in porous media
  • Reactive transport modelling addressing mineral precipitation and dissolution in porous media
  • Crystallization processes in fully or partially saturated porous media
  • Effects of mineral precipitation and dissolution on transport and mechanical properties of rocks in the subsurface
  • Imaging techniques for monitoring dissolution and precipitation processes in porous media
  • Environmental aspects, e.g., scale formation and incorporation of foreign ions, soil remediation, and weathering processes
  • Engineered systems, e.g., mineral dissolution and precipitation processes at interfaces of rocks and engineered structures with different chemical properties

Dr. Jenna Poonoosamy
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Reactive transport modelling
  • Evolving porous media imaging
  • Porosity clogging
  • Thermal-hydraulical-mechanical and chemical coupled processes

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Published Papers (2 papers)

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Research

18 pages, 5663 KiB  
Article
A Lab on a Chip Experiment for Upscaling Diffusivity of Evolving Porous Media
by Jenna Poonoosamy, Renchao Lu, Mara Iris Lönartz, Guido Deissmann, Dirk Bosbach and Yuankai Yang
Energies 2022, 15(6), 2160; https://doi.org/10.3390/en15062160 - 16 Mar 2022
Cited by 12 | Viewed by 2845
Abstract
Reactive transport modelling is a powerful tool to assess subsurface evolution in various energy-related applications. Upscaling, i.e., accounting for pore scale heterogeneities into larger scale analyses, remains one of the biggest challenges of reactive transport modelling. Pore scale simulations capturing the evolutions of [...] Read more.
Reactive transport modelling is a powerful tool to assess subsurface evolution in various energy-related applications. Upscaling, i.e., accounting for pore scale heterogeneities into larger scale analyses, remains one of the biggest challenges of reactive transport modelling. Pore scale simulations capturing the evolutions of the porous media over a wide range of Peclet and Damköhler number in combination with machine learning are foreseen as an efficient methodology for upscaling. However, the accuracy of these pore scale models needs to be tested against experiments. In this work, we developed a lab on a chip experiment with a novel micromodel design combined with operando confocal Raman spectroscopy, to monitor the evolution of porous media undergoing coupled mineral dissolution and precipitation processes due to diffusive reactive fluxes. The 3D-imaging of the porous media combined with pore scale modelling enabled the derivation of upscaled transport parameters. The chemical reaction tested involved the replacement of celestine by strontianite, whereby a net porosity increase is expected because of the smaller molar volume of strontianite. However, under our experimental conditions, the accessible porosity and consequently diffusivity decreased. We propose a transferability of the concepts behind the Verma and Pruess relationship to be applied to also describe changes of diffusivity for evolving porous media. Our results highlight the importance of calibrating pore scale models with quantitative experiments prior to simulations over a wide range of Peclet and Damköhler numbers of which results can be further used for the derivation of upscaled parameters. Full article
(This article belongs to the Special Issue Environmental Geochemistry: Precipitation and Dissolution in Porous Media)
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29 pages, 4577 KiB  
Article
Reactive Transport Model of Gypsum Karstification in Physically and Chemically Heterogeneous Fractured Media
by Jesús F. Águila, Javier Samper, Belén Buil, Paloma Gómez and Luis Montenegro
Energies 2022, 15(3), 761; https://doi.org/10.3390/en15030761 - 20 Jan 2022
Cited by 2 | Viewed by 2504
Abstract
Gypsum dissolution leads to the development of karstic features within much shorter timescales than in other sedimentary rocks, potentially leading to rapid deterioration of groundwater quality and increasing the risk of catastrophes caused by subsidence. Here, we present a 2-D reactive transport model [...] Read more.
Gypsum dissolution leads to the development of karstic features within much shorter timescales than in other sedimentary rocks, potentially leading to rapid deterioration of groundwater quality and increasing the risk of catastrophes caused by subsidence. Here, we present a 2-D reactive transport model to evaluate gypsum karstification in physically and chemically heterogeneous systems. The model considers a low-permeability rock matrix composed mainly of gypsum and a discontinuity (fracture), which acts as a preferential water pathway. Several scenarios are analyzed and simulated to investigate the relevance for gypsum karstification of: (1) the dynamic update of flow and transport parameters due to porosity changes; (2) the spatial distribution of minerals in the rock matrix; (3) the time evolution of water inflows through the boundaries of the model; (4) the functions relating permeability, k, to porosity, ϕ. The average porosity of the matrix after 1000 years of simulation increases from 0.045 to 0.29 when flow, transport, and chemical parameters and the water inflows through the boundary are dynamically updated according to the porosity changes. On the contrary, the porosity of the matrix hardly changes when the porosity feedback effect is not considered, while its average increases to 0.13 if the water inflow occurs through the discontinuity. Moreover, the dissolution of small amounts of highly soluble sulfate minerals plays a major role in the development of additional fractures. The increase in hydraulic conductivity is largest for the power law with an exponent of n = 5, as well as the Kozeny-Carman and the modified Fair-atch k-ϕ relationships. The gypsum dissolution front propagates into the matrix faster when the power law with n = 2 and 3 and the Verma–Pruess k-ϕ relationships are used. Full article
(This article belongs to the Special Issue Environmental Geochemistry: Precipitation and Dissolution in Porous Media)
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