{"id":{"repo_id":"adelaide","oai_identifier":"oai:digital.library.adelaide.edu.au:2440/124362"},"canonical_url":"https://search.dev.ndltd.org/etd/adelaide/oai:digital.library.adelaide.edu.au:2440/124362","repository":{"repo_id":"adelaide","name":"University of Adelaide","base_url":"https://digital.library.adelaide.edu.au/server/oai/request"},"display":{"title":"Particle Detachment in Single-Phase and Two-Phase Flows in Porous Media","abstract":"Hereby I present a PhD thesis by publications. This thesis includes seven journal papers, of which six have already been published in peer-reviewed journals and one has been submitted for publication and is presently under review. This thesis shows that the commonly used single particle-single surface Derjaguin-Landau-Verwey-Overbeek (DLVO) calculations do not always effectively predict particle detachment. Therefore, the mobilisation of clustered structures under particle-particle attraction is investigated. The critical detachment velocity of clusters is higher than for single colloids and provides better agreement with the laboratory results. The behaviour of particles and clusters was also investigated during drainage and imbibition in visualisation experiments. Particles remain on the air-water interfaces of residual liquid patches left behind the drainage front. Later, these particles join the imbibition front away from the substrate. In a previously dried channel, the vapour condensation ahead of the imbibition front detaches particles from the surface by a rising air-water interface. This thesis presents an extension of the traditional mathematical model for colloid transport by including equations for the particle re-attachment rate and the attached-concentration-dependency of permeability. The new model captures the effect of permeability increase due to colloid mobilisation and further re-attachment in stagnant zones of the porous space. This effect was observed during high-salinity water injection in cores with low kaolinite concentrations. This model is also extended to account for the presence of a residual phase. Compared with fines migration under single-phase flow, having a residual phase significantly reduces the permeability variation. Analytical solutions for over and undersaturated state of fines were also derived in this thesis. Oversaturation means that particles begin to detach as soon as the flow starts. In the undersaturated case, particle detachment occurs only with further increase in detaching torque or decrease in attaching torque. The derived models allow formulating the fingerprints for the flow of over and undersaturated fines in porous media. Novel analytical models for one-dimensional linear and axisymmetric suspension-colloidal transport accounting for fines detachment and capture were also derived. Laboratory experiments with low-salinity water injection were performed. The model coefficients obtained from laboratory data treatment were used for reliable laboratory-based prediction of well injectivity decline. The results show that fines migration during low-salinity water injection results in significant well injectivity impairment. The thesis also investigates low-salinity water slug injection followed by a high-salinity chase drive in a two layer-cake reservoir. The formation damage caused by fines mobilisation during low-salinity water injection diverts the injected water flux into low-permeability zones and enhances sweep efficiency. An optimal low-salinity slug size existed for all simulated cases. The optimal slug size is similar to the pore volume of the high-permeability layer. The analytical models derived in this thesis are applicable in numerous environmental and engineering processes, including the injection of low-salinity or hot water in a reservoir, ocean water invasion into aquifers, freshwater storage, and contamination of subterranean waters by viruses and bacteria. It also has many applications in hydrology and ecology, such as ground cleaning from non-aqueous phase liquids, remediation of contaminated soil and groundwater, and natural filtration of pathogenic microorganisms.","abstract_html":"Hereby I present a PhD thesis by publications. This thesis includes seven journal papers, of which six have already been published in peer-reviewed journals and one has been submitted for publication and is presently under review. This thesis shows that the commonly used single particle-single surface Derjaguin-Landau-Verwey-Overbeek (DLVO) calculations do not always effectively predict particle detachment. Therefore, the mobilisation of clustered structures under particle-particle attraction is investigated. The critical detachment velocity of clusters is higher than for single colloids and provides better agreement with the laboratory results. The behaviour of particles and clusters was also investigated during drainage and imbibition in visualisation experiments. Particles remain on the air-water interfaces of residual liquid patches left behind the drainage front. Later, these particles join the imbibition front away from the substrate. In a previously dried channel, the vapour condensation ahead of the imbibition front detaches particles from the surface by a rising air-water interface. This thesis presents an extension of the traditional mathematical model for colloid transport by including equations for the particle re-attachment rate and the attached-concentration-dependency of permeability. The new model captures the effect of permeability increase due to colloid mobilisation and further re-attachment in stagnant zones of the porous space. This effect was observed during high-salinity water injection in cores with low kaolinite concentrations. This model is also extended to account for the presence of a residual phase. Compared with fines migration under single-phase flow, having a residual phase significantly reduces the permeability variation. Analytical solutions for over and undersaturated state of fines were also derived in this thesis. Oversaturation means that particles begin to detach as soon as the flow starts. In the undersaturated case, particle detachment occurs only with further increase in detaching torque or decrease in attaching torque. The derived models allow formulating the fingerprints for the flow of over and undersaturated fines in porous media. Novel analytical models for one-dimensional linear and axisymmetric suspension-colloidal transport accounting for fines detachment and capture were also derived. Laboratory experiments with low-salinity water injection were performed. The model coefficients obtained from laboratory data treatment were used for reliable laboratory-based prediction of well injectivity decline. The results show that fines migration during low-salinity water injection results in significant well injectivity impairment. The thesis also investigates low-salinity water slug injection followed by a high-salinity chase drive in a two layer-cake reservoir. The formation damage caused by fines mobilisation during low-salinity water injection diverts the injected water flux into low-permeability zones and enhances sweep efficiency. An optimal low-salinity slug size existed for all simulated cases. The optimal slug size is similar to the pore volume of the high-permeability layer. The analytical models derived in this thesis are applicable in numerous environmental and engineering processes, including the injection of low-salinity or hot water in a reservoir, ocean water invasion into aquifers, freshwater storage, and contamination of subterranean waters by viruses and bacteria. It also has many applications in hydrology and ecology, such as ground cleaning from non-aqueous phase liquids, remediation of contaminated soil and groundwater, and natural filtration of pathogenic microorganisms.","abstract_has_math":false,"creators":["Boechat Chequer, Larissa"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Bredrikovetsky, Pavel","Zeinijahromi, Abbas"],"committee_chairs":[],"committee_members":[],"year":2019,"date_issued":"2019","date_published":"2019","updated_at":"2026-07-24T00:51:05Z","subjects":["Colloid transport","mechanical equilibrium","phase diagram","drainage","imbibition","contact angle","particle detachment","fines migration","permeability decline","mathematical modelling","exact solution","residual gas","laboratory study","well injectivity","analytical model","porous media","low-salinity waterflooding","formation damage","slug injection","fines assisted waterflood"],"languages":["en"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2440/124362","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Bredrikovetsky, Pavel","Zeinijahromi, Abbas"]},{"key":"dc:creator","label":"Author","values":["Boechat Chequer, Larissa"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.issued","label":"Date","values":["2019"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Colloid transport","mechanical equilibrium","phase diagram","drainage","imbibition","contact angle","particle detachment","fines migration","permeability decline","mathematical modelling","exact solution","residual gas","laboratory study","well injectivity","analytical model","porous media","low-salinity waterflooding","formation damage","slug injection","fines assisted waterflood"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/2440/124362"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Hereby I present a PhD thesis by publications. This thesis includes seven journal papers, of which six have already been published in peer-reviewed journals and one has been submitted for publication and is presently under review. This thesis shows that the commonly used single particle-single surface Derjaguin-Landau-Verwey-Overbeek (DLVO) calculations do not always effectively predict particle detachment. Therefore, the mobilisation of clustered structures under particle-particle attraction is investigated. The critical detachment velocity of clusters is higher than for single colloids and provides better agreement with the laboratory results. The behaviour of particles and clusters was also investigated during drainage and imbibition in visualisation experiments. Particles remain on the air-water interfaces of residual liquid patches left behind the drainage front. Later, these particles join the imbibition front away from the substrate. In a previously dried channel, the vapour condensation ahead of the imbibition front detaches particles from the surface by a rising air-water interface. This thesis presents an extension of the traditional mathematical model for colloid transport by including equations for the particle re-attachment rate and the attached-concentration-dependency of permeability. The new model captures the effect of permeability increase due to colloid mobilisation and further re-attachment in stagnant zones of the porous space. This effect was observed during high-salinity water injection in cores with low kaolinite concentrations. This model is also extended to account for the presence of a residual phase. Compared with fines migration under single-phase flow, having a residual phase significantly reduces the permeability variation. Analytical solutions for over and undersaturated state of fines were also derived in this thesis. Oversaturation means that particles begin to detach as soon as the flow starts. In the undersaturated case, particle detachment occurs only with further increase in detaching torque or decrease in attaching torque. The derived models allow formulating the fingerprints for the flow of over and undersaturated fines in porous media. Novel analytical models for one-dimensional linear and axisymmetric suspension-colloidal transport accounting for fines detachment and capture were also derived. Laboratory experiments with low-salinity water injection were performed. The model coefficients obtained from laboratory data treatment were used for reliable laboratory-based prediction of well injectivity decline. The results show that fines migration during low-salinity water injection results in significant well injectivity impairment. The thesis also investigates low-salinity water slug injection followed by a high-salinity chase drive in a two layer-cake reservoir. The formation damage caused by fines mobilisation during low-salinity water injection diverts the injected water flux into low-permeability zones and enhances sweep efficiency. An optimal low-salinity slug size existed for all simulated cases. The optimal slug size is similar to the pore volume of the high-permeability layer. The analytical models derived in this thesis are applicable in numerous environmental and engineering processes, including the injection of low-salinity or hot water in a reservoir, ocean water invasion into aquifers, freshwater storage, and contamination of subterranean waters by viruses and bacteria. It also has many applications in hydrology and ecology, such as ground cleaning from non-aqueous phase liquids, remediation of contaminated soil and groundwater, and natural filtration of pathogenic microorganisms."]},{"key":"dc:title","label":"Title","values":["Particle Detachment in Single-Phase and Two-Phase Flows in Porous Media"]}]}],"canonical_facts":{"dc:contributor.advisor":["Bredrikovetsky, Pavel","Zeinijahromi, Abbas"],"dc:creator":["Boechat Chequer, Larissa"],"dc:date.issued":["2019"],"dc:description.abstract":["Hereby I present a PhD thesis by publications. This thesis includes seven journal papers, of which six have already been published in peer-reviewed journals and one has been submitted for publication and is presently under review. This thesis shows that the commonly used single particle-single surface Derjaguin-Landau-Verwey-Overbeek (DLVO) calculations do not always effectively predict particle detachment. Therefore, the mobilisation of clustered structures under particle-particle attraction is investigated. The critical detachment velocity of clusters is higher than for single colloids and provides better agreement with the laboratory results. The behaviour of particles and clusters was also investigated during drainage and imbibition in visualisation experiments. Particles remain on the air-water interfaces of residual liquid patches left behind the drainage front. Later, these particles join the imbibition front away from the substrate. In a previously dried channel, the vapour condensation ahead of the imbibition front detaches particles from the surface by a rising air-water interface. This thesis presents an extension of the traditional mathematical model for colloid transport by including equations for the particle re-attachment rate and the attached-concentration-dependency of permeability. The new model captures the effect of permeability increase due to colloid mobilisation and further re-attachment in stagnant zones of the porous space. This effect was observed during high-salinity water injection in cores with low kaolinite concentrations. This model is also extended to account for the presence of a residual phase. Compared with fines migration under single-phase flow, having a residual phase significantly reduces the permeability variation. Analytical solutions for over and undersaturated state of fines were also derived in this thesis. Oversaturation means that particles begin to detach as soon as the flow starts. In the undersaturated case, particle detachment occurs only with further increase in detaching torque or decrease in attaching torque. The derived models allow formulating the fingerprints for the flow of over and undersaturated fines in porous media. Novel analytical models for one-dimensional linear and axisymmetric suspension-colloidal transport accounting for fines detachment and capture were also derived. Laboratory experiments with low-salinity water injection were performed. The model coefficients obtained from laboratory data treatment were used for reliable laboratory-based prediction of well injectivity decline. The results show that fines migration during low-salinity water injection results in significant well injectivity impairment. The thesis also investigates low-salinity water slug injection followed by a high-salinity chase drive in a two layer-cake reservoir. The formation damage caused by fines mobilisation during low-salinity water injection diverts the injected water flux into low-permeability zones and enhances sweep efficiency. An optimal low-salinity slug size existed for all simulated cases. The optimal slug size is similar to the pore volume of the high-permeability layer. The analytical models derived in this thesis are applicable in numerous environmental and engineering processes, including the injection of low-salinity or hot water in a reservoir, ocean water invasion into aquifers, freshwater storage, and contamination of subterranean waters by viruses and bacteria. It also has many applications in hydrology and ecology, such as ground cleaning from non-aqueous phase liquids, remediation of contaminated soil and groundwater, and natural filtration of pathogenic microorganisms."],"dc:identifier.uri":["http://hdl.handle.net/2440/124362"],"dc:language.iso":["en"],"dc:subject":["Colloid transport","mechanical equilibrium","phase diagram","drainage","imbibition","contact angle","particle detachment","fines migration","permeability decline","mathematical modelling","exact solution","residual gas","laboratory study","well injectivity","analytical model","porous media","low-salinity waterflooding","formation damage","slug injection","fines assisted waterflood"],"dc:title":["Particle Detachment in Single-Phase and Two-Phase Flows in Porous Media"],"dc:type":["Thesis"]},"updated_at":"2026-07-24T00:51:05Z"}