2019
DOI: 10.2478/johh-2019-0009
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Computational and experimental pore-scale studies of a carbonate rock sample

Abstract: Carbonate rocks host several large water and hydrocarbon reservoirs worldwide, some of them highly heterogeneous involving complex pore systems. Pre-salt reservoirs in the Santos Basin off the south-east coast of Brazil, are an example of such rocks, with much attention focused on proper characterization of their petrophysical and multiphase flow properties. Since it is very difficult to obtain rock samples (coquinas) from these very deep reservoirs, analogues from north-eastern Brazil are often used because o… Show more

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Cited by 11 publications
(26 citation statements)
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“…7 could be confirmed by the main percolation clusters in the coquina (Fig. 9) before and after CSW injection (Godoy et al, 2019;Hoerlle et al, 2020;Lima et al, 2020). A more detailed evaluation is presented in the following section based on the generated skeleton of the sample.…”
Section: Microct Analysismentioning
confidence: 72%
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“…7 could be confirmed by the main percolation clusters in the coquina (Fig. 9) before and after CSW injection (Godoy et al, 2019;Hoerlle et al, 2020;Lima et al, 2020). A more detailed evaluation is presented in the following section based on the generated skeleton of the sample.…”
Section: Microct Analysismentioning
confidence: 72%
“…The non-destructive microCT experiments were used to investigate changes in the internal pore structure of the samples to better understand permeability changes that may occur after carbonated water injection. X-ray microtomography is now widely used for both qualitative and quantitative porescale analyses, including for pore-scale flow modeling (Godoy et al, 2019;Lima et al, 2020;Saxena et al, 2017), determination of wettability through studies of the contact angle in images (Al Ratrout et al, 2018;Andrew et al, 2014;Armstrong et al, 2021;Prodanović et al, 2004), and analyses of the distribution of immiscible fluids inside pores (Alvarado et al, 2004;Schnaar and Brusseau, 2006), among other soil and rock hydrologic applications. MicroCT results provide input for digital pore and pore network modeling (PNM) analyses to highlight the pore-scale basis of macro-scale (or continuum-scale) multiphase fluid flow and contaminant transport processes (de Vries et al, 2017;Rabbani and Babaei, 2019;Raoof et al, 2013).…”
Section: Introductionmentioning
confidence: 99%
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“…The samples were subjected to X-ray microtomography imaging in order to understand the pore framework of the coquinas. Imaging was performed in three sequential steps: acquisition of high-resolution (16-bit) x-ray images using Skyscan model 1173 microtomography, image reconstruction using NRecon ® software (Skyscan/Bruker, v.1.6.9.4) as detailed by Godoy et al (2019), and image processing using Avizo Fire ® 9.5 software (ThermoFisher Scientific, Massachusetts, US). For the acquisition, we used a 1-mm aluminium filter to reduce noise in the images, while the equipment was calibrated with a voltage of 80 kV and 100 µA.…”
Section: Methodsmentioning
confidence: 99%
“…Average properties can be determined by averaging over a large bundle of pores. Pore network modeling has been successfully employed for reactive transport , two-phase flow (Bultreys et al, 2015;Yin et al, 2018), flow and permeability estimation (Godoy et al, 2019), solute transport (Qin and Hassanizadeh, 2015;Mahmoodlu et al, 2020), and colloid transport (Zhang et al, 2015). The computational efficiency of pore network modeling enables simulating a very large number of pores in three dimensions.…”
Section: Introduction: Solute and Colloid Transport In Dual-porosity Mediamentioning
confidence: 99%