Experimental investigation on front morphology for two‐phase flow in heterogeneous porous media

Heiss, V.; Neuweiler, Insa; Ochs, Steffen; Färber, A.

doi:10.1029/2011wr010612

Cited by 9 publications

(5 citation statements)

References 38 publications

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“…NAPL displacement of water observed in a water-wet micromodel was unstable and resulted in multipore blobs of residual water, whereas in an oilwet micromodel displacement was smooth with occasional single-pore blobs of residual water [Grate et al, 2013]. Heiß et al [2011] examined NAPL displacement of water with no buoyancy (q NAPL 5q water ) in waterwet heterogeneous sediments and observed that residual water became entrapped as isolated macroscopic clusters and that the amount of entrapment depended on the heterogeneity structure and the NAPL infiltration rate. In water-wet fractured limestone blocks, residual DNAPL saturation decreased with increased dip of the fracture and trapped blob length depended on fracture roughness and aperture width distribution [Longino and Kueper, 1999].…”

Section: Experimental Studies Of Napl Flow and Entrapmentmentioning

confidence: 95%

“…Heiß et al . [] examined NAPL displacement of water with no buoyancy (

ρ_{N A P L} = ρ_{w a t e r}

) in water‐wet heterogeneous sediments and observed that residual water became entrapped as isolated macroscopic clusters and that the amount of entrapment depended on the heterogeneity structure and the NAPL infiltration rate. In water‐wet fractured limestone blocks, residual DNAPL saturation decreased with increased dip of the fracture and trapped blob length depended on fracture roughness and aperture width distribution [ Longino and Kueper , ].…”

Section: The Organic Napl Sourcementioning

confidence: 99%

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Organic contaminant transport and fate in the subsurface: Evolution of knowledge and understanding

Essaid

Bekins

Cozzarelli

2015

Water Resources Research

149

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Toxic organic contaminants may enter the subsurface as slightly soluble and volatile nonaqueous phase liquids (NAPLs) or as dissolved solutes resulting in contaminant plumes emanating from the source zone. A large body of research published in Water Resources Research has been devoted to characterizing and understanding processes controlling the transport and fate of these organic contaminants and the effectiveness of natural attenuation, bioremediation, and other remedial technologies. These contributions include studies of NAPL flow, entrapment, and interphase mass transfer that have advanced from the analysis of simple systems with uniform properties and equilibrium contaminant phase partitioning to complex systems with pore-scale and macroscale heterogeneity and rate-limited interphase mass transfer. Understanding of the fate of dissolved organic plumes has advanced from when biodegradation was thought to require oxygen to recognition of the importance of anaerobic biodegradation, multiple redox zones, microbial enzyme kinetics, and mixing of organic contaminants and electron acceptors at plume fringes. Challenges remain in understanding the impacts of physical, chemical, biological, and hydrogeological heterogeneity, pore-scale interactions, and mixing on the fate of organic contaminants. Further effort is needed to successfully incorporate these processes into field-scale predictions of transport and fate. Regulations have greatly reduced the frequency of new point-source contamination problems; however, remediation at many legacy plumes remains challenging. A number of fields of current relevance are benefiting from research advances from point-source contaminant research. These include geologic carbon sequestration, nonpoint-source contamination, aquifer storage and recovery, the fate of contaminants from oil and gas development, and enhanced bioremediation.

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Section: Experimental Studies Of Napl Flow and Entrapmentmentioning

confidence: 95%

“…Heiß et al . [] examined NAPL displacement of water with no buoyancy (

ρ_{N A P L} = ρ_{w a t e r}

Section: The Organic Napl Sourcementioning

confidence: 99%

Organic contaminant transport and fate in the subsurface: Evolution of knowledge and understanding

Essaid

Bekins

Cozzarelli

2015

Water Resources Research

149

View full text Add to dashboard Cite

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“…Literature observations about laboratory experiments report that even apparently homogeneous samples give flow patterns which are not consistent with standard models [20], [21]. In this sense, small scale heterogeneities cause the flow to develop channels and fingers Fig.…”

Section: Introductionmentioning

confidence: 92%

Modelling of kinetic interface sensitive tracers reactive transport in 2D two-phase flow heterogeneous porous media

et al. 2019

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Fluid-fluid interfacial area plays an important role for mass- and energy-transfer processes across the interface which is relevant in several hydrogeological and engineering applications, e.g. enhanced oil-gas recovery, CO2 storage in geological formations, unconventional geothermal systems, contaminant removal, etc. Kinetic interface sensitive tracers were designed to determine the size of the interface between two fluids by undergoing hydrolysis at the fluid-fluid interface. This study investigates by means of numerical modelling the influence of heterogeneity on the KIS tracer breakthrough curves in six idealized scenarios (S1-S6). It is an extension of the previous work conducted in “one-dimensional” column experiments by Tatomir et al. (2018) [1]. The changes in interfacial area are created by inclusion of heterogeneities at the Darcy-scale. The results show that KIS tracers can be used in two-dimensional experimental setup and can provide information about the size and dynamic evolution of interfacial area. Therefore, this is a first step for the dimensioning of an experimental flume.

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“…Experimental characterization of crude oil contaminant entrapment and movement within unsaturated pores has shown that the dispersion process can cause the development of fingers due to pore-scale heterogeneity and fluid interactions (Ovdat and Berkowitz, 2006). Furthermore, residual waters are typically trapped as isolated macroscopic clusters as a result of crude oil displacement of water without buoyancy in water-wet heterogeneous sediments, with the degree of entrapment depending on the heterogeneity structure and crude oil penetration rate (Heib et al, 2011).…”

Section: Experimental Approachmentioning

confidence: 99%

Soil and groundwater contamination by crude oil spillage: A review and implications for remediation projects in Nigeria

Adeniran

Oladunjoye

Doro

2023

Front. Environ. Sci.

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Management of soil and groundwater resources has been recognized as essential to meeting the sustainable development goals of Agenda 2063 of the African Union. As Africa’s fastest growing population with over 200 million people, Nigeria is responsible for leading the continent’s environmental sustainability goal. Nigeria has seen a sizable number of crude oil spillages that have contaminated its soils and groundwater resources, and several of these contaminated sites are to be cleaned up yet. There needs to be more scientific data to design an effective cleanup and to manage the soil and groundwater resources effectively. So far, the only extensive crude oil-contaminated site remediation project documented is on Ogoniland in the Niger Delta region of Nigeria. However, this project resulted in less effective, albeit temporary, cleanup solutions. This review presents a state-of-the-art synthesis of research on soil and groundwater contamination by crude oil. It includes sections on processes, measurements, predictions, and management, as well as an analysis of the state and challenges in Nigeria. In-depth field, laboratory, and computer models for crude oil contamination investigation have been developed with over 60 years of significant research. However, studies and case projects in Nigeria have relied on point sampling to determine the concentration of crude oil contaminants in soil and groundwater. This method offers limited information on the solute concentration and hydraulic distribution, which regulates pollutant mobility within the subsurface. The absence of baseline and high-resolution subsurface characterization data has also resulted in a need for more process-based knowledge to direct the development of site-specific remediation strategies. As a result, it is challenging to design a conceptual model that is detailed enough to help with predictions of the flow dynamics of crude oil contaminants in the unsaturated and saturated zones. It is anticipated that this review will stimulate further multidisciplinary research through site evaluation and monitoring to provide reliable information that can be used to develop appropriate model-based remediation solutions.

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Experimental investigation on front morphology for two‐phase flow in heterogeneous porous media

Cited by 9 publications

References 38 publications

Organic contaminant transport and fate in the subsurface: Evolution of knowledge and understanding

Organic contaminant transport and fate in the subsurface: Evolution of knowledge and understanding

Modelling of kinetic interface sensitive tracers reactive transport in 2D two-phase flow heterogeneous porous media

Soil and groundwater contamination by crude oil spillage: A review and implications for remediation projects in Nigeria

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