Welcome

Welcome to the 4th Brazil Interpore Chapter Meeting!

Thank you for accepting our invitation to attend the 4th-Interpore conference of the Brazilian chapter.

The conference will be held from 2 to 3 August 2021 with scientific program focusing on advances in the research, methods, and theory of Porous Media in close connection to the topics: Green World, Smart Materials, Oil Science and Microfluidic.

Particularly, this year we shall have a different format compared to the predecessors meetings. The conference will be fully virtual in the Zoom platform with a program based on four main thematic sessions, each one solely containing four invited talks, followed by discussions at the end of each session.

Please find below a preliminary program of the meeting, along with highlights current trends on porous media related topics to strengthen collaboration among researchers by bringing together international and Brazilian specialists from academia and industry acting in a wide range of areas related to porous media research.

  • Porous Media & Green World;

  • Following current trends of Interpore (2020 https://events.interpore.org/event/23 ) and (2021 https://events.interpore.org/event/25 ), Energy & Climate porous media science and engineering has played an important historical role in the development of the current global energy system through the production of oil, natural gas, and coal. Unfortunately, combustion of the produced fuels has led to the current climate and carbon problem, prompting the urgent need to transition to a low carbon future. While renewables such as wind and solar will play a major role in the energy transition, creative uses of natural and engineered porous media will also be a critical part of any viable low carbon energy system. Because fossil fuels will form a significant part of the foreseeable future energy mix, CO2 capture and subsequent subsurface storage must play a major role in both direct carbon-capture-and-storage (CCS) projects and in negative emissions scenarios like Bio-Energy with CCS, or BECCS. In addition to large-scale carbon storage, more creative uses of porous media also need to be developed, including creative subsurface energy storage schemes to deal with intermittency of renewables, and novel capture technologies in engineered systems as well as naturally reactive rocks. This can include improved methods for oil and gas production, all aspects of CCS systems including storage in reactive rock systems as well as negative emissions involving BECCS, and new methods for subsurface energy storage including those that complement traditional wind and solar. Moreover, Porous Media for a Green World: Water & Agriculture also includes a sustainable use of soil and water resources is crucial to preserve healthy terrestrial ecosystems and maintaining food security. Many of the scientific and technical challenges related to these issues hinge on understanding, controlling and optimizing processes that involve the multiscale (in both space and time) dynamics of water and nutrients in the soil-plant system. Fundamental research on these interdisciplinary topics will provide guidance and novel solutions to improve human actions on agroecosystems and reduce their potential negative impacts. The long-lasting environmental repercussion of water and soil management in agroecosystems and the elements of irreversibility on the microscale structure of soils in relation to soil degradation and salinization, groundwater dynamics, carbon and nutrient retention, which in turn affect plant status and productivity and ultimately ecosystems conditions and human welfare, are of interest.

  • Porous Media & Smart Materials;

  • Recently, application of porous media science in the design of smart materials has gained significant interest within the scientific community. The main idea underlying such an attention resides in the possibility of manipulating pore size distributions for optimizing material response under particular external stimuli, such as flow conditions, mechanical stress, chemical reaction and temperature gradients. Applications are widespread and involve the design of drug carriers, skin permeation, selection of material in buildings capable of reacting efficiently to weather conditions, mobile phone screens that repair themselves, among others. In this section the invited speakers will present state-of-the-art methods along with a guidance of promising topics for research development in the area.

  • Porous Media & Oil Science;

  • The porous media flows appear as a fundamental environment in a wide range of technological applications and natural sciences. At the same time, they also bring a very rich content to the areas of pure and applied mathematics, which study the fundamental basis for models construction and properties of their solutions, as well as the problems of numerical analysis and scientific computing. Because the multidisciplinary approach is intrinsic for the porous media studies, the development of mathematical theories has mutual benefit from the close connection to experimental works and innovative development, possibly of practical relevance for industry and/or society. Petroleum industry as Oil Science covers several aspects that may include possible practical relevance and its mathematical complexity and engineering concerned with the activities related to the production of hydrocarbons. A growing, world population aspiring to ever higher living standards is placing even more unprecedented demands on the resources of the earth. Today's primary sources of energy are mainly non-renewable. Petroleum, which is currently a principal source of power world-wide, is itself among the vanishing resources. In this thematic session Porous Media & Oil Science, we will stimulate discussions to cover several aspects that may include possible practical relevance and its mathematical, numerical, experimental and engineering complexity viewpoints and bring together researchers from pure and applied sciences to share their ideas on the porous media & oil science perspectives in their studies.

  • Porous Media & Microfluidic.

  • Macroscopic multiphase flow phenomena can only be fully understood through a fundamental comprehension of the complex multiphase flow at the microscopic scale. Recent improvements on the fabrication techniques of microfluidic devices have led to a growth in the use of flow visualization at the pore scale to gain specific information on how the different phases occupy the pore space. In this section, the invited speakers will discuss recent advances on the use of microfluidics to gain fundamental understanding of pore scale flow of complex liquids.

Program

Monday, August 2, 2021

08h45 – 09h00: Opening Session

09h00 – 12h00: Porous Media & Green World

13h15 – 13h30: Opening Session

13h30 – 16h30: Porous Media & Smart Materials

16h30 – 16h45: Closing Session

Tuesday, August 3, 2021

08h45 – 09h00: Opening Session

09h00 – 12h00: Porous Media & Oil Science

13h15 – 13h30: Opening Session

13h30 – 16h30: Porous Media & Microfluidic

16h30 – 16h45: Closing Session


Day 1 (Aug 02, 2021) Day 2 (Aug 03, 2021)
Porous Media & Green World Porous Media & Oil Science
BRT Time Plenarist Plenarist
08:45 – 09:00 Opening Session: Prof. Rien van Genuchten Opening Session: Majid Hassanizadeh
09:00 – 09:30 Ali A. Eftekhari – DHRTC José A. Barbosa – UFPE
09:30 – 10:00 Kleber M. Lisbôa – UFF Paulo Couto – COPPE
10:00 – 10:30 Aderson F. do Nascimento – UFRN Hadi Hajibeygi – TU Delft
10:30 – 11:00 Vanessa Simões – Schlumberger Yulia Petrova – IMPA & SPBU
11:00 – 12:00 Discussion Discussion

Day 1 (Aug 02, 2021) Day 2 (Aug 03, 2021)
Porous Media & Smart Materials Porous Media & Microfluidic
BRT Time Plenarist Plenarist
13:15 – 13:30 Opening Session Opening Session
13:30 – 14:00 Rosângela C. Balaban – UFRN Márcio Carvalho – PUC-Rio
14:00 – 14:30 Helcio Orlande – COPPE Sujit Datta – Princeton
14:30 – 15:00 Rodrigo Weber – UFJF Aurora Pérez-Gramatges – PUC-Rio
15:00 – 15:30 Lilit Yeghiazarian – Univ. Cincinnati Fabiano G. Wolf – UFSC (Joinville)
15:30 – 16:30 Discussion Discussion
16:30 – 16:45 Closing Session Closing Session

Abstracts

Day 1 (Aug 02, 2021)


BRT Time, 09:00 – 09:30


Abandoned reservoirs for fuel and carbon dioxide storage: an energy perspective from the Danish North Sea

Ali A. Eftekharia

aDanish Hydrocarbon Research and Technology Centre (DHRTC), Technical University of Denmark (DTU), Denmark

Abstract

Production of conventional oil and gas from the North Sea is decreasing. At the same time, more wind farms are being installed in the North Sea. The future realization of “the energy island” will increase the capacity of offshore power production to 10 GW, twice the current average electricity demand in Denmark. The intermittent nature of this electricity, however, does not guarantee a continuous supply of power. The unpredictable fluctuation of renewable electricity above and below the consumer demand leaves the energy providers with two main options: storing the surplus electricity in large scales or covering the electricity deficit by zero-emission power plants equipped with carbon capture and storage. The current state of the art suggests that large-scale energy storage is only possible by the conversion of electricity to a chemical or physical form and storing it in a suitable vessel such as a salt cavern or an abandoned gas reservoir. It is also possible to store the captured carbon dioxide from the power plants (and other industrial point sources) in the vast and safe space of the abandoned reservoirs. These solutions also increase the lifetime of the existing facilities and save the incredibly high cost of abandonment. In this talk, we will have a closer look at the current state of technology and the energy balance of the conversion of the surplus renewable electricity to different fuels (power2x) and storing them in the North Sea fields. We will also investigate the reproduction of the stored fuel and address the most important question: can the subsurface energy storage address the intermittency of renewable electricity efficiently and effectively? We will also touch upon the effectiveness of carbon dioxide capture and storage.


BRT Time, 09:30 – 10:00


Leveraging the entropy generation minimization and designed porous media for the optimization of heat sinks employed in low-grade waste heat harvesting

Kleber M. Lisbôaa

aDepartment of Mechanical Engineering – UFF, Brazil

Abstract

A comprehensive optimization procedure for the design of heat sinks used to harvest low-grade waste heat for secondary processes is proposed. A designed porous medium approach is used, providing modelling versatility and allowing for the treatment of several internal geometries within the same framework. Two applications, taken from the cooling of high concentration photovoltaic cells and membrane distillation, are used to illustrate the proposed procedure. Three internal heat sink geometries, namely plate fins, pin fins, and metal foams, are analyzed, and the selection as to which one is the more advantageous is shown to be dependent on size and operational conditions. Possible pitfalls of a traditional design procedure are pointed out, for heat transfer capability, under high heat load condition, should be emphasized over fluid friction avoidance. The entropy generation rate is then shown to be a reliable metric when designing for low-grade waste heat recovery, automatically focusing on either viscous dissipation or thermal resistance minimization without introducing any artificial figure of merit for that purpose.


BRT Time, 10:00 – 10:30


Geothermal energy: challenges and opportunities for the young at heart

Aderson Farias do Nascimentoa

aDepartment of Geophysics – DGEF/UFRN, Brazil

Abstract

Geothermal energy is a renewable asset has proven to be a viable across the globe in nearly 90 countries. However, most of this resource remains untapped although the technology is mature and can considerably support climate change mitigation. One of the central problems hindering a more widespread use of this resource is that ~ 98% of the total geothermal resource is in “Hot Dry Rocks” (HDR) and “Hot Sedimentary Aquifers” (HSA). Exploiting HDR/HSA resource requires the construction of a reservoir to generate an “Enhanced Geothermal System” (EGS). EGS are formed by artificially creating fractures for the circulation of fluid in the rockmass. This fluid-rock interaction poses many challenges in thermal-hydromechanical coupling modeling. This talk will present some of these current developments, challenges and opportunities of research topics that involve fields of numerical modeling, geoscience and engineering.


BRT Time, 10:30 – 11:00


An advanced multi-physics integration to improve reservoir fluid saturation

Vanessa Simõesa

aSchlumberger Brazil Research and Geoengineering Center – Schlumberger, Brazil

Abstract

In this talk, we present an advanced multi-physics integration of wellbore in-situ measurements for subsurface characterization. This integration allows describing the near-wellbore region as a complex porous system with varying fluid saturation caused by the difference in pressure in the wellbore interface and correct for this effect improving the reservoir. Those measurements are integrated using physics and data-driven methods, including a Machine Learning enabled fluid flow simulator that considers static and dynamic formation properties such as permeability and capillary pressure to estimate the expected radial profile of fluid saturation around the borehole. In the end, we describe how the gas effect in those measurements allows for deriving a varying gas saturation around the borehole that can be used for improving the monitoring of CO2 reservoirs using wellbore measurements.

Short bio: Vanessa Simoes is a Senior Data Scientist in the Digital Subsurface Intelligence team in Schlumberger with experience in acoustics, rock physics, and multi-physics integration, and focused on machine learning applications.

References

[1] Simoes, V., et. al. "Machine Learning Proxy Enabling Interpretation of Wellbore Measurements." SPWLA 61st Annual Logging Symposium, (2020). doi: https://doi.org/10.30632/SPWLA-5072 .
[2] Shetty, S., et. al. "Imaging Near-Wellbore Petrophysical Properties by Joint Inversion of Sonic, Resistivity, and Density Logging Data." Petrophysics 58 (2017): 501–516.


BRT Time, 13:30 – 14:00


Porous and smart materials made of polysaccharides

Rosangela de Carvalho Balabana

aInstitute of Chemistry – IQ/UFRN, Brazil

Abstract

Polymers are organic molecules of high molecular weight with a great number of repeating units in their backbone. Depending on the functional groups in the repeating units, a diversity of materials can be produced. The polysaccharides are natural polymers which have, on average, three hydroxyls in each repeating unit. With these characteristics, they have been extensively used in the production of functional devices, by using appropriate reactions of chemical modification. There are many advantages of using polysaccharides, however, the most prominent ones are the biodegradability, biocompatibility and the renewable character of the raw material (of plant, animal or microbial origin). This presentation highlights some strategies employed in the preparation of smart porous matrices based on guar gum and starch, as well as the main obtained results.


BRT Time, 14:00 – 14:30


Thermal treatment of cancer

Helcio R. B. Orlandea

aDepartment of Mechanical Engineering, Escola Politécnica/COPPE – UFRJ, Brazil

Abstract

Although the use of heat in medicine dates back from remote centuries, recent advances in nanotechnology raised great interest on the thermal treatment of cancer. In this particular application, nanoparticles located in the tumor improve the local absorption of energy from an external and non-intrusive source, thus selectively increasing the temperature of tumor cells and reducing thermal damage to healthy cells. The use of heat for the treatment of cancer can be aimed at: (i) A mild temperature increase of the tumor, in order to make their cells more susceptible to the effects of other treatments, like radiotherapy or chemotherapy; or (ii) A large temperature increase of the tumor to kill their cells solely by the effects of heat. Within the medical community, these treatments are usually referred as hyperthermia and thermal ablation, respectively. In this talk we summarize our recent developments involving the thermal treatment of cancer, specifically on the development of nanoparticles, indirect temperature measurements, model selection/calibration and optimal design under uncertainties of hyperthermia and thermal ablation.


BRT Time, 14:30 – 15:00


Modeling the dynamics of contrast during cardiac magnetic resonance imaging for the detection of myocardial injuries

Rodrigo Weber dos Santosa, Evandro Dias Gaio, João Rafael Alves, Rafael A. B. de Queiroz, Bernardo M. Rocha

aComputational Modeling Graduate Program, Federal University of Juiz de Fora, Juiz de Fora, Minas Gerais, Brazil

Abstract

This work presents a mathematical model to describe the dynamics of perfusion in cardiac tissue. The model extends a previous one [1] and can be used in the quantification of clinical information usually obtained via imaging techniques, such as cardiac magnetic resonance imaging (MRI) perfusion exams. The model treats extravascular and intravascular domains as continuum porous media. For the extravascular domain, Darcy's law is adopted. We propose new reaction-diffusion-advection equations to capture the dynamics of contrast agents that are typically used in MRI perfusion exams. The quantification of injuries or fibrosis, i.e., an increase of the connective tissue in the extravascular domain, is modeled via adsorption of the contrast. Different scenarios were simulated and compared to clinical images: normal perfusion; and myocardial injury due to myocardial infarction, COVID-induced myocarditis, or other cardiovascular diseases. The computational model was able to reproduce the late-enhancement MRI exam that detects the presence of fibrosis. Altogether, the results obtained suggest that the models can support the process of non-invasive cardiac perfusion quantification and the diagnosis of myocardial infarction, COVID-induced myocarditis, and other deadly diseases.

References

[1] Simulation of the Perfusion of Contrast Agent Used in Cardiac Magnetic Resonance: A Step Toward Non-invasive Cardiac Perfusion Quantification. JR Alves, RAB de Queiroz, M Bär, RW dos Santos. Frontiers in Physiology 10. 2019.
[2] Simulation of cardiac perfusion by contrast in the myocardium using a formulation of flow in porous media. JR Alves, RAB de Queiroz, RW dos Santos. Journal of Computational and Applied Mathematics 295, 13-24. 2018.


BRT Time, 15:00 – 15:30


Designing materials with target properties and microstructure

Benjamin Paisley, M. Sadegh Riasi, Mircea Grigoriu, Lilit Yeghiazariana

aDepartment of Environmental Eng & Science – CEAS/UC, USA

Abstract

Behavior and properties of smart materials depend to a large degree on their microstructure; and our ability to control it imparts a measure of control over material behavior. The experimental cost of material design however can be prohibitive, so fast and efficient numerical methods are much needed. We present the adjustable level-cut filtered Poisson field (ALCPF) method, which has a low computational cost, can design a variety of microstructures with a wide range of target properties, and has intuitive input parameters that can be interpreted as physical descriptors of the microstructure. The ALCPF is based on the level-cut Poisson field theory. Using simple filtered Poisson field parameters, ALCPF generates several initial realizations of the target structure. Then, rather than generating a completely new field, the optimization algorithm takes a weighted geometric average of the initial domains to produce an updated random field. Material properties of the generated sample are then computed using a fast pore topology method (PTM). The weights are adjusted until an optimal domain is found. Our results demonstrate that ALCPF can successfully generate microstructures with target pore size distribution, pore size gradient and permeability at a wide range of porosities.

Day 2 (Aug 03, 2021)


BRT Time, 09:00 – 09:30


Porous systems in reservoir rocks, an evolving understanding

José Antonio Barbosaa

aDepartment of Geoscience (DGEO), Universidade Federal de Pernambuco, Brazil

Abstract

For a century, the oil industry has been trying to understand the universe represented by the porous space in buried rocks - its most intrinsic characteristics. As the available reserves became limited in onshore regions, the industry moved to the offshore realms. It also expanded the interest for rocks considered not adequate to perform as hydrocarbon reservoirs such as tight limestones and sandstones, fine-grained impermeable rocks, and igneous rocks. When it sought rocks that porous system depends mainly on porosity created during deep burial processes (secondary porosity - fracturing and dissolution), the universe of the pore systems became more complex. The new scenarios impose the needing to incorporate the reactive nature of carbonate rocks, the influence of fractures in rocks with low matrix porosity, and the extreme challenge of nano-scale pore space. To build better numerical models, we still need better solutions to tackle the coupling of different phenomena effects (diagenesis, geomechanics) that define what we call pore space. To deal with the present and future challenges, the hopes remain in the potential of Artificial Intelligence and Data Science to pursue better models. Another possible way to help to improve numerical simulations is the execution of physical experiments on the macroscopic scale. It needs to accomplish the integral characterization of large models and new approaches to monitoring the essays. These dissected analogs could serve as model benchmarks for the scientific community, and it would improve the validation and testing of numerical simulations.

BRT Time, 09:30 – 10:00


Enhanced oil recovery by CO2 injection and its application in the Brazilian pre-salt: a perspective from pore-scale

Paulo Coutoa

aProgram of Civil Engineering – COPPE/UFRJ, Brazil

Abstract

The recovery factor (RF) of petroleum reservoirs will be analysed in terms of multiscale phenomena. Miscible displacement phenomena at pore-scale using CO2 as an Enhanced Oil Recovery promoter is presented. Case studies based on the Brazilian pre-salt scenarios will be discussed.

BRT Time, 10:00 – 10:30


Dynamic multiscale simulation of naturally fractured reservoirs: pEDFM-ADM

Hadi Hajibeygia

aFaculty of Civil Engineering and Geosciences – TU Delft, The Netherlands

Abstract

Subsurface geological reservoirs span large length scales with highly heterogeneous properties at much finer resolutions. In addition, many of them are fractured. Fractures significantly increase spatial-temporal and physics contrasts in the media. For accurate field development strategies, one cannot upscale all fractures. On the other hand, no reasonable computational capacity allows for modeling all fractures explicitly. Even after a hierarchical modeling approach, in which a cut-off scale is used to homogenize sub-grid fractures and explicitly treat all the rest, there will remain many fractures to be modelled explicitly. In this talk, I present two major developments to tackle this challenge and make simulation of fractured reservoirs with explicit fracture modeling a field-relevant practice: (1) pEDFM modeling approach and (2) ADM. pEDFM (projection-based embedded discrete fracture model) is developed to be a stand-alone package for introducing 3D complex fractures within a given reservoir domain to any simulator. It applies independent mesh for explicit fractures and the matrix rock, and it works with all grids including the corner-point-grid geometries. No mesh complexity is needed in pEDFM, in contrast to its alternative conformal discrete fracture modelling approaches. pEDFM can handle highly-conductive to flowing-barrier fractures and faults within their embedding reservoirs. Built on the pEDFM package, we then develop a dynamic multiscale strategy (ADM) in which fine-scale fully-implicit simulations are transferred across coarser resolutions both in space and time to advance the computational speedup. We demonstrate our ADM quality performance for 3D fractured systems for both multiphase flow in reservoirs and for low-enthalpy and high-enthalpy geothermal systems. Finally, the ongoing projects related to adding geo-mechanics and contact mechanics to the multiscale fracture modelling package (in https://gitlab.com/darsim) will be introduced and discussed.

BRT Time, 10:30 – 11:00


Graded viscosity banks on the rear end of the polymer slug

Yulia Petrovaa

aDepartment of Mathematical Physics – Saint Petersburg, Russia

Abstract

One of the problems in EOR methods is the instability that occurs on the interface between two fluids with high viscosity contrast. The usage of viscous polymer agent can partially solve the problem by making the water-oil front stable. However the subsequent displacement of polymer by water produce a lot of long thin "water fingers" on the rear end of the polymer slug. The breakthrough of the polymer slug reduces the oil recovery factor. In the talk we will discuss how to calculate the size of polymer slug and consider the technology of graded viscosity banks (GVB) which helps to reduce the amount of polymer mass without loss of it's effectiveness. GVB technology was proposed by Claridge and consists in injecting several subsequent polymer slugs of decseasing concentrations. As viscosity ratio reduces, the instabilities start to grow slowly and one can inject less amount of polymer with the same positive effect on oil recovery. The main assumption of GVB technology is the linear growth of the front and rear ends of the mixing zone. There are a lot of numerical works that confirm linear behavior of fingers at intermediate times, but unfortunately no rigorous results exist up to now. However it is possible to get pessimistic estimates on velocities of the mixing zone by analyzing the mathematical model of the miscible displacement (the so-called Peaceman model) under transverse flow equilibrium assumptions. Unlike the well-known Koval and Todd-Longstaff models, these estimates take into account not only the viscosity ratio, but the whole viscosity curve. In the talk we will give an overview of the existing models and present our results in this direction, e.g. taking into account the adsorption effects. From practical point of view a natural question arises: "How many slugs should one inject?" To answer this question we calculate the amount of saved polymer for n slugs and prove a theorem that there exists a limiting injection profile as number of slugs tends to infinity. This gives an upper bound on the possible amount of saved polymer. Analyzing the result for different viscosity curves and finger velocity models we conclude that for many practical situations it is enough to inject 2-5 slugs. We verify the GVB technology with our numerical experiments in DuMuX.

This is a joint work with Fedor Bakharev, Aleksandr Enin, Konstantin Kalinin, Nikita Rastegaev, Sergey Tikhomirov. The talk is based on: arXiv:2012.03114 and arXiv:2012.02849.


BRT Time, 13:30 – 14:00


Microscale physics in oil displacement by complex liquids in porous media

Marcio Carvalhoa

aDepartment of Mechanical Engineering – DEM/PUC-Rio, Brazil

Abstract

The most common oil recovery method used for displacing the oil and maintaining the reservoir pressure is water injection. However, in most cases, the recovery efficiency of this method is limited by the high fluid mobility ratio and reservoir heterogeneities. The non-linear flow properties of complex fluids through porous media give rise to multiphase flow displacement mechanisms that operate at different scales, from pore-level to Darcy scale, leading to substantial increase in the volume of oil recovered. The mechanisms responsible for increasing the recovery factor in different EOR methods are not fully understood. Macroscopic behavior in immiscible displacement flow in porous media is directly related to pore-scale phenomena. Therefore, it is important to study the porous media flow on the microscopic level with the purpose of understanding, modeling, and predicting the macroscopic behavior during oil production. Experimental studies of flow in porous media at the pore scale allow the direct flow visualization employing two dimensional (2D) micromodels and optical/fluorescent microscopy and, more recently, three dimensional (3D) micromodels, especially with nuclear magnetic resonance (NMR), x-ray micro-CT and confocal microscopy. This work presents visualization of the microscale flow of different complex fluids, including emulsions, suspension of soft microcapsules, polymeric solutions and foams, through 2D and 3D transparent models of porous media, which reveals the physical mechanisms associated with the improved pore level displacement efficiency and lower residual oil saturation. Image processing was used to evaluate the final phase distribution at the end of the injection of different fluids.

BRT Time, 14:00 – 14:30


Viscoelastic polymer flooding in 3D porous media

Sujit S. Dattaa

aDepartment of Chemical and Biological Engineering – Princeton, USA

Abstract

Many energy, environmental, industrial, and microfluidic processes rely on the viscous flow of polymer solutions through porous media. In many cases, the macroscopic flow resistance abruptly increases above a threshold flow rate in a porous medium-but not in bulk solution. The reason why has been a puzzle for over half a century. Here, by directly visualizing the flow in a transparent three-dimensional (3D) porous medium, we demonstrate that this anomalous increase is due to the onset of an elastic instability in which the flow exhibits strong spatio-temporal fluctuations reminiscent of inertial turbulence, despite the vanishingly small Reynolds number. We find that the transition to unstable flow in each pore is continuous, arising due to the increased persistence of discrete bursts of instability above an onset flow rate; however, this onset value varies from pore to pore. Thus, unstable flow is spatially heterogeneous across the different pores of the medium, with unstable and laminar regions coexisting. Guided by these findings, we quantitatively establish that the energy dissipated by unstable pore-scale fluctuations generates the anomalous increase in flow resistance through the entire medium. Thus, by linking the onset of unstable flow at the pore scale to transport at the macroscale, our work yields generally-applicable guidelines for predicting and controlling polymer solution flows.

BRT Time, 14:30 – 15:00


Formation and stabilization of CO2-in-brine foams: from bulk to porous media

Aurora Pérez-Gramatgesa

aDepartment of Chemistry, PUC-Rio, Brazil

Abstract

CO2-in-brine foams play an important role in several industrial applications such as Enhanced Oil Recovery (EOR) and Carbon Capture Storage (CSS). These meta-stable dispersions are typically generated in porous media by dissolving a surfactant in a brine phase that is injected alternately with slugs of CO2. One of the key factors determining the success of foam-field applications is to identify suitable surfactant formulations able to reduce the extensive foam drainage and coarsening occurring in harsh environments, in particular, in high salinity brines. This talk will cover the fundamental aspects of foam generation and the mechanisms involved in foam destruction, which determine the stability and persistence of liquid foams both in bulk and in porous media.

BRT Time, 15:00 – 15:30


Creation of dual-porosity micromodels for carbonate rocks

Fabiano G. Wolfa, Marcelo Carreñob, Alexandre Lopesb, Diogo Nardelli Sieberta, Rodrigo Surmasc

aPorous Media Research Group (PORO), Technological Center of Joinville, Federal University of Santa Catarina, 89219-600 Joinville, SC, Brazil
bNew Materials and Devices Group (GNMD), Department of Electronic Systems Engineering, Polytechnic School of the University of São Paulo, 05508-010 São Paulo, SP, Brazil
cLeopoldo Américo Miguez de Mello Research and Development Center (CENPES/Petrobras), 21941-598 Rio de Janeiro, RJ, Brazil

Abstract

Carbonate rocks usually present a large variation in the pore size within the same sample and may contain macroscopic pores ranging from a few millimeters to microscopic pores of the order of fractions of micrometers. The presence of microporosity regions with pores smaller than 10 μm is am is a well-known observation [1]. However, the role of the microporosity on the transport phenomena is not well understood and has been demanding specific analysis. In this work, dual-porosity micromodels were created with the intention of mimicking those carbonate rocks made of microporous grains and microporous cement. The micromodels structures were generated by extending the Voronoi tessellation method introduced by Wu [2] by including some improvements that incorporated a bimodal distribution of throat sizes obtained from mercury injection porosimetry. The obtained results have shown the presence of microporosity regions can affect the single-phase permeability in a significant way. The microporosity influence is quite evident when two-phase fluid flow conditions are analyzed since the wetting fluid tends to be trapped in those finer regions. The novel approach presented in this work represents a step forward for the creation of more representative micromodels for the study of fluid flow at the pore scale.

References

[1] Dave L. Cantrell, Royal M. Hagerty; Microporosity in Arab Formation Carbonates, Saudi Arabia. GeoArabia; 4 (2): 129-154.
[2] Wu, M., Xiao, F., Johnson-Paben, R. M., Retterer, S. T., Yin, X., and Neeves, K. B. (2012). Single- and two-phase flow in microfluidic porous media analogs based on Voronoi tessellation. Lab Chip, 12:253-261.

Official Poster of BR InterPore 2021

interporeBR_flyer

Download the poster: Low Resolution (PNG), High Resolution (PDF)

Organizing Committee

  • Alexei A. Mailybaev - Laboratory of Fluid Dynamics – FLUID/IMPA, Brazil
  • Eduardo Abreu - Department of Applied Mathematics - IMECC/UNICAMP, Brazil
  • Grigori Chapiro - Department of Mathematics - DM/UFJF, Brazil
  • Marcio Murad - Department of Computational Modeling - COMOD/LNCC, Brazil
  • Marcio Carvalho – Department of Mechanical Engineering – DEM/PUC-Rio, Brazil
  • Sidarta Lima – Department of Applied Mathematics – DM/UFRN, Brazil

Plenarists

Contact

Email:

brinterpore2021@gmail.com