The Experts below are selected from a list of 90 Experts worldwide ranked by ideXlab platform
Georg Dresen - One of the best experts on this subject based on the ideXlab platform.
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Hydraulic fracturing stimulation techniques and formation damage mechanisms—Implications from laboratory testing of tight sandstone-proppant systems
Chemie Der Erde-geochemistry, 2010Co-Authors: Andreas Reinicke, Sergei Stanchits, Ernst Huenges, Erik Rybacki, Georg DresenAbstract:Abstract Reservoir formation damage may seriously affect the productivity of a reservoir during various phases of fluid recovery from the subsurFace. Hydraulic fracturing technology is one tool to overcome inflow impairments due to formation damage and to increase the productivity of reservoirs. However, the increase in productivity by hydraulic fracturing operations can be limited by permeability alterations adjacent to the newly created Fracture Face. Such an impairment of the inflow to the Fracture is commonly referred to as Fracture Face skin (FFS). Here, we focus on mechanically induced Fracture Face skin, which may result from stress-induced mechanical interactions between proppants and reservoir rock during production. In order to achieve sustainable, long-term productivity from a reservoir, it is indispensable to understand the hydraulic and mechanical interactions in rock–proppant systems. We performed permeability measurements on tight sandstones with propped Fractures under stress using two different flow cells, allowing to localise and quantify the mechanical damage at the Fracture Face. The laboratory experiments revealed a permeability reduction of this rock–proppant system down to 77% of initial rock permeability at 50 MPa differential stress leading to a permeability reduction in the Fracture Face skin zone up to a factor of 6. Considerable mechanical damage at the rock–proppant interFace was already observed for stresses of about 5 MPa. Microstructure analysis identified quartz grain crushing, fines production, and pore space blocking at the Fracture Face causing the observed mechanically induced FFS. At higher stresses, damage and embedment of the ceramic proppants further reduces the Fracture permeability. Therefore, even low differential stresses, which are expected under in-situ conditions, may considerably affect the productivity of hydraulic proppant fracturing stimulation campaigns, in particular in unconventional reservoirs where the Fracture Face is considerably larger compared to conventional hydraulic stimulations.
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Hydraulic fracturing stimulation techniques and formation damage mechanisms-Implications from laboratory testing of tight sandstone-proppant systems
Chemie der Erde, 2010Co-Authors: Andreas Reinicke, Sergei Stanchits, Ernst Huenges, Erik Rybacki, Georg DresenAbstract:Reservoir formation damage may seriously affect the productivity of a reservoir during various phases of fluid recovery from the subsurFace. Hydraulic fracturing technology is one tool to overcome inflow impairments due to formation damage and to increase the productivity of reservoirs. However, the increase in productivity by hydraulic fracturing operations can be limited by permeability alterations adjacent to the newly created Fracture Face. Such an impairment of the inflow to the Fracture is commonly referred to as Fracture Face skin (FFS). Here, we focus on mechanically induced Fracture Face skin, which may result from stress-induced mechanical interactions between proppants and reservoir rock during production. In order to achieve sustainable, long-term productivity from a reservoir, it is indispensable to understand the hydraulic and mechanical interactions in rock-proppant systems. We performed permeability measurements on tight sandstones with propped Fractures under stress using two different flow cells, allowing to localise and quantify the mechanical damage at the Fracture Face. The laboratory experiments revealed a permeability reduction of this rock-proppant system down to 77% of initial rock permeability at 50. MPa differential stress leading to a permeability reduction in the Fracture Face skin zone up to a factor of 6. Considerable mechanical damage at the rock-proppant interFace was already observed for stresses of about 5. MPa. Microstructure analysis identified quartz grain crushing, fines production, and pore space blocking at the Fracture Face causing the observed mechanically induced FFS. At higher stresses, damage and embedment of the ceramic proppants further reduces the Fracture permeability. Therefore, even low differential stresses, which are expected under in-situ conditions, may considerably affect the productivity of hydraulic proppant fracturing stimulation campaigns, in particular in unconventional reservoirs where the Fracture Face is considerably larger compared to conventional hydraulic stimulations. © 2010 Elsevier GmbH.
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Mechanically Induced Permeability Damage Due to Rock Proppant Interactions
70th EAGE Conference and Exhibition incorporating SPE EUROPEC 2008, 2008Co-Authors: Andreas Reinicke, Sergei Stanchits, Ernst Huenges, B. Legarth, Georg DresenAbstract:Hydraulic proppant fracturing technology is used for a wide range of problems from bypassing drilling induced near wellbore damage to increasing productivity of extreme low-permeable reservoirs. During production the placed proppant pack interacts mechanically with the rock matrix. This causes proppant embedment and grain / proppant crushing and leads to permeability damage at the Fracture Face. To investigate this mechanically induced Fracture Face skin (FFS) new laboratory equipment was used to quantify the permeability damage ratio at the Fracture Face and to locate the damaging events via acoustic emission (AE). High permeable Bentheim sandstone as well as low permeable Flechtingen sandstone was investigated. The tests point out that crushing and fines production starts at low stresses at the Fracture Face. This effects a permeability reduction at the Fracture Face up a factor of 67 compared to the initial rock permeability for high permeable rock. For low permeable rock the permeability reduction factor is about 7. The conducted tests give evidence that rock matrix proppant interactions induce a significant permeability reduction and leads to mechanically induced FFS.
Andreas Reinicke - One of the best experts on this subject based on the ideXlab platform.
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Hydraulic fracturing stimulation techniques and formation damage mechanisms—Implications from laboratory testing of tight sandstone-proppant systems
Chemie Der Erde-geochemistry, 2010Co-Authors: Andreas Reinicke, Sergei Stanchits, Ernst Huenges, Erik Rybacki, Georg DresenAbstract:Abstract Reservoir formation damage may seriously affect the productivity of a reservoir during various phases of fluid recovery from the subsurFace. Hydraulic fracturing technology is one tool to overcome inflow impairments due to formation damage and to increase the productivity of reservoirs. However, the increase in productivity by hydraulic fracturing operations can be limited by permeability alterations adjacent to the newly created Fracture Face. Such an impairment of the inflow to the Fracture is commonly referred to as Fracture Face skin (FFS). Here, we focus on mechanically induced Fracture Face skin, which may result from stress-induced mechanical interactions between proppants and reservoir rock during production. In order to achieve sustainable, long-term productivity from a reservoir, it is indispensable to understand the hydraulic and mechanical interactions in rock–proppant systems. We performed permeability measurements on tight sandstones with propped Fractures under stress using two different flow cells, allowing to localise and quantify the mechanical damage at the Fracture Face. The laboratory experiments revealed a permeability reduction of this rock–proppant system down to 77% of initial rock permeability at 50 MPa differential stress leading to a permeability reduction in the Fracture Face skin zone up to a factor of 6. Considerable mechanical damage at the rock–proppant interFace was already observed for stresses of about 5 MPa. Microstructure analysis identified quartz grain crushing, fines production, and pore space blocking at the Fracture Face causing the observed mechanically induced FFS. At higher stresses, damage and embedment of the ceramic proppants further reduces the Fracture permeability. Therefore, even low differential stresses, which are expected under in-situ conditions, may considerably affect the productivity of hydraulic proppant fracturing stimulation campaigns, in particular in unconventional reservoirs where the Fracture Face is considerably larger compared to conventional hydraulic stimulations.
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Hydraulic fracturing stimulation techniques and formation damage mechanisms-Implications from laboratory testing of tight sandstone-proppant systems
Chemie der Erde, 2010Co-Authors: Andreas Reinicke, Sergei Stanchits, Ernst Huenges, Erik Rybacki, Georg DresenAbstract:Reservoir formation damage may seriously affect the productivity of a reservoir during various phases of fluid recovery from the subsurFace. Hydraulic fracturing technology is one tool to overcome inflow impairments due to formation damage and to increase the productivity of reservoirs. However, the increase in productivity by hydraulic fracturing operations can be limited by permeability alterations adjacent to the newly created Fracture Face. Such an impairment of the inflow to the Fracture is commonly referred to as Fracture Face skin (FFS). Here, we focus on mechanically induced Fracture Face skin, which may result from stress-induced mechanical interactions between proppants and reservoir rock during production. In order to achieve sustainable, long-term productivity from a reservoir, it is indispensable to understand the hydraulic and mechanical interactions in rock-proppant systems. We performed permeability measurements on tight sandstones with propped Fractures under stress using two different flow cells, allowing to localise and quantify the mechanical damage at the Fracture Face. The laboratory experiments revealed a permeability reduction of this rock-proppant system down to 77% of initial rock permeability at 50. MPa differential stress leading to a permeability reduction in the Fracture Face skin zone up to a factor of 6. Considerable mechanical damage at the rock-proppant interFace was already observed for stresses of about 5. MPa. Microstructure analysis identified quartz grain crushing, fines production, and pore space blocking at the Fracture Face causing the observed mechanically induced FFS. At higher stresses, damage and embedment of the ceramic proppants further reduces the Fracture permeability. Therefore, even low differential stresses, which are expected under in-situ conditions, may considerably affect the productivity of hydraulic proppant fracturing stimulation campaigns, in particular in unconventional reservoirs where the Fracture Face is considerably larger compared to conventional hydraulic stimulations. © 2010 Elsevier GmbH.
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Mechanically Induced Permeability Damage Due to Rock Proppant Interactions
70th EAGE Conference and Exhibition incorporating SPE EUROPEC 2008, 2008Co-Authors: Andreas Reinicke, Sergei Stanchits, Ernst Huenges, B. Legarth, Georg DresenAbstract:Hydraulic proppant fracturing technology is used for a wide range of problems from bypassing drilling induced near wellbore damage to increasing productivity of extreme low-permeable reservoirs. During production the placed proppant pack interacts mechanically with the rock matrix. This causes proppant embedment and grain / proppant crushing and leads to permeability damage at the Fracture Face. To investigate this mechanically induced Fracture Face skin (FFS) new laboratory equipment was used to quantify the permeability damage ratio at the Fracture Face and to locate the damaging events via acoustic emission (AE). High permeable Bentheim sandstone as well as low permeable Flechtingen sandstone was investigated. The tests point out that crushing and fines production starts at low stresses at the Fracture Face. This effects a permeability reduction at the Fracture Face up a factor of 67 compared to the initial rock permeability for high permeable rock. For low permeable rock the permeability reduction factor is about 7. The conducted tests give evidence that rock matrix proppant interactions induce a significant permeability reduction and leads to mechanically induced FFS.
Sergei Stanchits - One of the best experts on this subject based on the ideXlab platform.
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Hydraulic fracturing stimulation techniques and formation damage mechanisms—Implications from laboratory testing of tight sandstone-proppant systems
Chemie Der Erde-geochemistry, 2010Co-Authors: Andreas Reinicke, Sergei Stanchits, Ernst Huenges, Erik Rybacki, Georg DresenAbstract:Abstract Reservoir formation damage may seriously affect the productivity of a reservoir during various phases of fluid recovery from the subsurFace. Hydraulic fracturing technology is one tool to overcome inflow impairments due to formation damage and to increase the productivity of reservoirs. However, the increase in productivity by hydraulic fracturing operations can be limited by permeability alterations adjacent to the newly created Fracture Face. Such an impairment of the inflow to the Fracture is commonly referred to as Fracture Face skin (FFS). Here, we focus on mechanically induced Fracture Face skin, which may result from stress-induced mechanical interactions between proppants and reservoir rock during production. In order to achieve sustainable, long-term productivity from a reservoir, it is indispensable to understand the hydraulic and mechanical interactions in rock–proppant systems. We performed permeability measurements on tight sandstones with propped Fractures under stress using two different flow cells, allowing to localise and quantify the mechanical damage at the Fracture Face. The laboratory experiments revealed a permeability reduction of this rock–proppant system down to 77% of initial rock permeability at 50 MPa differential stress leading to a permeability reduction in the Fracture Face skin zone up to a factor of 6. Considerable mechanical damage at the rock–proppant interFace was already observed for stresses of about 5 MPa. Microstructure analysis identified quartz grain crushing, fines production, and pore space blocking at the Fracture Face causing the observed mechanically induced FFS. At higher stresses, damage and embedment of the ceramic proppants further reduces the Fracture permeability. Therefore, even low differential stresses, which are expected under in-situ conditions, may considerably affect the productivity of hydraulic proppant fracturing stimulation campaigns, in particular in unconventional reservoirs where the Fracture Face is considerably larger compared to conventional hydraulic stimulations.
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Hydraulic fracturing stimulation techniques and formation damage mechanisms-Implications from laboratory testing of tight sandstone-proppant systems
Chemie der Erde, 2010Co-Authors: Andreas Reinicke, Sergei Stanchits, Ernst Huenges, Erik Rybacki, Georg DresenAbstract:Reservoir formation damage may seriously affect the productivity of a reservoir during various phases of fluid recovery from the subsurFace. Hydraulic fracturing technology is one tool to overcome inflow impairments due to formation damage and to increase the productivity of reservoirs. However, the increase in productivity by hydraulic fracturing operations can be limited by permeability alterations adjacent to the newly created Fracture Face. Such an impairment of the inflow to the Fracture is commonly referred to as Fracture Face skin (FFS). Here, we focus on mechanically induced Fracture Face skin, which may result from stress-induced mechanical interactions between proppants and reservoir rock during production. In order to achieve sustainable, long-term productivity from a reservoir, it is indispensable to understand the hydraulic and mechanical interactions in rock-proppant systems. We performed permeability measurements on tight sandstones with propped Fractures under stress using two different flow cells, allowing to localise and quantify the mechanical damage at the Fracture Face. The laboratory experiments revealed a permeability reduction of this rock-proppant system down to 77% of initial rock permeability at 50. MPa differential stress leading to a permeability reduction in the Fracture Face skin zone up to a factor of 6. Considerable mechanical damage at the rock-proppant interFace was already observed for stresses of about 5. MPa. Microstructure analysis identified quartz grain crushing, fines production, and pore space blocking at the Fracture Face causing the observed mechanically induced FFS. At higher stresses, damage and embedment of the ceramic proppants further reduces the Fracture permeability. Therefore, even low differential stresses, which are expected under in-situ conditions, may considerably affect the productivity of hydraulic proppant fracturing stimulation campaigns, in particular in unconventional reservoirs where the Fracture Face is considerably larger compared to conventional hydraulic stimulations. © 2010 Elsevier GmbH.
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Mechanically Induced Permeability Damage Due to Rock Proppant Interactions
70th EAGE Conference and Exhibition incorporating SPE EUROPEC 2008, 2008Co-Authors: Andreas Reinicke, Sergei Stanchits, Ernst Huenges, B. Legarth, Georg DresenAbstract:Hydraulic proppant fracturing technology is used for a wide range of problems from bypassing drilling induced near wellbore damage to increasing productivity of extreme low-permeable reservoirs. During production the placed proppant pack interacts mechanically with the rock matrix. This causes proppant embedment and grain / proppant crushing and leads to permeability damage at the Fracture Face. To investigate this mechanically induced Fracture Face skin (FFS) new laboratory equipment was used to quantify the permeability damage ratio at the Fracture Face and to locate the damaging events via acoustic emission (AE). High permeable Bentheim sandstone as well as low permeable Flechtingen sandstone was investigated. The tests point out that crushing and fines production starts at low stresses at the Fracture Face. This effects a permeability reduction at the Fracture Face up a factor of 67 compared to the initial rock permeability for high permeable rock. For low permeable rock the permeability reduction factor is about 7. The conducted tests give evidence that rock matrix proppant interactions induce a significant permeability reduction and leads to mechanically induced FFS.
Ernst Huenges - One of the best experts on this subject based on the ideXlab platform.
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Hydraulic fracturing stimulation techniques and formation damage mechanisms—Implications from laboratory testing of tight sandstone-proppant systems
Chemie Der Erde-geochemistry, 2010Co-Authors: Andreas Reinicke, Sergei Stanchits, Ernst Huenges, Erik Rybacki, Georg DresenAbstract:Abstract Reservoir formation damage may seriously affect the productivity of a reservoir during various phases of fluid recovery from the subsurFace. Hydraulic fracturing technology is one tool to overcome inflow impairments due to formation damage and to increase the productivity of reservoirs. However, the increase in productivity by hydraulic fracturing operations can be limited by permeability alterations adjacent to the newly created Fracture Face. Such an impairment of the inflow to the Fracture is commonly referred to as Fracture Face skin (FFS). Here, we focus on mechanically induced Fracture Face skin, which may result from stress-induced mechanical interactions between proppants and reservoir rock during production. In order to achieve sustainable, long-term productivity from a reservoir, it is indispensable to understand the hydraulic and mechanical interactions in rock–proppant systems. We performed permeability measurements on tight sandstones with propped Fractures under stress using two different flow cells, allowing to localise and quantify the mechanical damage at the Fracture Face. The laboratory experiments revealed a permeability reduction of this rock–proppant system down to 77% of initial rock permeability at 50 MPa differential stress leading to a permeability reduction in the Fracture Face skin zone up to a factor of 6. Considerable mechanical damage at the rock–proppant interFace was already observed for stresses of about 5 MPa. Microstructure analysis identified quartz grain crushing, fines production, and pore space blocking at the Fracture Face causing the observed mechanically induced FFS. At higher stresses, damage and embedment of the ceramic proppants further reduces the Fracture permeability. Therefore, even low differential stresses, which are expected under in-situ conditions, may considerably affect the productivity of hydraulic proppant fracturing stimulation campaigns, in particular in unconventional reservoirs where the Fracture Face is considerably larger compared to conventional hydraulic stimulations.
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Hydraulic fracturing stimulation techniques and formation damage mechanisms-Implications from laboratory testing of tight sandstone-proppant systems
Chemie der Erde, 2010Co-Authors: Andreas Reinicke, Sergei Stanchits, Ernst Huenges, Erik Rybacki, Georg DresenAbstract:Reservoir formation damage may seriously affect the productivity of a reservoir during various phases of fluid recovery from the subsurFace. Hydraulic fracturing technology is one tool to overcome inflow impairments due to formation damage and to increase the productivity of reservoirs. However, the increase in productivity by hydraulic fracturing operations can be limited by permeability alterations adjacent to the newly created Fracture Face. Such an impairment of the inflow to the Fracture is commonly referred to as Fracture Face skin (FFS). Here, we focus on mechanically induced Fracture Face skin, which may result from stress-induced mechanical interactions between proppants and reservoir rock during production. In order to achieve sustainable, long-term productivity from a reservoir, it is indispensable to understand the hydraulic and mechanical interactions in rock-proppant systems. We performed permeability measurements on tight sandstones with propped Fractures under stress using two different flow cells, allowing to localise and quantify the mechanical damage at the Fracture Face. The laboratory experiments revealed a permeability reduction of this rock-proppant system down to 77% of initial rock permeability at 50. MPa differential stress leading to a permeability reduction in the Fracture Face skin zone up to a factor of 6. Considerable mechanical damage at the rock-proppant interFace was already observed for stresses of about 5. MPa. Microstructure analysis identified quartz grain crushing, fines production, and pore space blocking at the Fracture Face causing the observed mechanically induced FFS. At higher stresses, damage and embedment of the ceramic proppants further reduces the Fracture permeability. Therefore, even low differential stresses, which are expected under in-situ conditions, may considerably affect the productivity of hydraulic proppant fracturing stimulation campaigns, in particular in unconventional reservoirs where the Fracture Face is considerably larger compared to conventional hydraulic stimulations. © 2010 Elsevier GmbH.
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Mechanically Induced Permeability Damage Due to Rock Proppant Interactions
70th EAGE Conference and Exhibition incorporating SPE EUROPEC 2008, 2008Co-Authors: Andreas Reinicke, Sergei Stanchits, Ernst Huenges, B. Legarth, Georg DresenAbstract:Hydraulic proppant fracturing technology is used for a wide range of problems from bypassing drilling induced near wellbore damage to increasing productivity of extreme low-permeable reservoirs. During production the placed proppant pack interacts mechanically with the rock matrix. This causes proppant embedment and grain / proppant crushing and leads to permeability damage at the Fracture Face. To investigate this mechanically induced Fracture Face skin (FFS) new laboratory equipment was used to quantify the permeability damage ratio at the Fracture Face and to locate the damaging events via acoustic emission (AE). High permeable Bentheim sandstone as well as low permeable Flechtingen sandstone was investigated. The tests point out that crushing and fines production starts at low stresses at the Fracture Face. This effects a permeability reduction at the Fracture Face up a factor of 67 compared to the initial rock permeability for high permeable rock. For low permeable rock the permeability reduction factor is about 7. The conducted tests give evidence that rock matrix proppant interactions induce a significant permeability reduction and leads to mechanically induced FFS.
Erik Rybacki - One of the best experts on this subject based on the ideXlab platform.
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Hydraulic fracturing stimulation techniques and formation damage mechanisms—Implications from laboratory testing of tight sandstone-proppant systems
Chemie Der Erde-geochemistry, 2010Co-Authors: Andreas Reinicke, Sergei Stanchits, Ernst Huenges, Erik Rybacki, Georg DresenAbstract:Abstract Reservoir formation damage may seriously affect the productivity of a reservoir during various phases of fluid recovery from the subsurFace. Hydraulic fracturing technology is one tool to overcome inflow impairments due to formation damage and to increase the productivity of reservoirs. However, the increase in productivity by hydraulic fracturing operations can be limited by permeability alterations adjacent to the newly created Fracture Face. Such an impairment of the inflow to the Fracture is commonly referred to as Fracture Face skin (FFS). Here, we focus on mechanically induced Fracture Face skin, which may result from stress-induced mechanical interactions between proppants and reservoir rock during production. In order to achieve sustainable, long-term productivity from a reservoir, it is indispensable to understand the hydraulic and mechanical interactions in rock–proppant systems. We performed permeability measurements on tight sandstones with propped Fractures under stress using two different flow cells, allowing to localise and quantify the mechanical damage at the Fracture Face. The laboratory experiments revealed a permeability reduction of this rock–proppant system down to 77% of initial rock permeability at 50 MPa differential stress leading to a permeability reduction in the Fracture Face skin zone up to a factor of 6. Considerable mechanical damage at the rock–proppant interFace was already observed for stresses of about 5 MPa. Microstructure analysis identified quartz grain crushing, fines production, and pore space blocking at the Fracture Face causing the observed mechanically induced FFS. At higher stresses, damage and embedment of the ceramic proppants further reduces the Fracture permeability. Therefore, even low differential stresses, which are expected under in-situ conditions, may considerably affect the productivity of hydraulic proppant fracturing stimulation campaigns, in particular in unconventional reservoirs where the Fracture Face is considerably larger compared to conventional hydraulic stimulations.
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Hydraulic fracturing stimulation techniques and formation damage mechanisms-Implications from laboratory testing of tight sandstone-proppant systems
Chemie der Erde, 2010Co-Authors: Andreas Reinicke, Sergei Stanchits, Ernst Huenges, Erik Rybacki, Georg DresenAbstract:Reservoir formation damage may seriously affect the productivity of a reservoir during various phases of fluid recovery from the subsurFace. Hydraulic fracturing technology is one tool to overcome inflow impairments due to formation damage and to increase the productivity of reservoirs. However, the increase in productivity by hydraulic fracturing operations can be limited by permeability alterations adjacent to the newly created Fracture Face. Such an impairment of the inflow to the Fracture is commonly referred to as Fracture Face skin (FFS). Here, we focus on mechanically induced Fracture Face skin, which may result from stress-induced mechanical interactions between proppants and reservoir rock during production. In order to achieve sustainable, long-term productivity from a reservoir, it is indispensable to understand the hydraulic and mechanical interactions in rock-proppant systems. We performed permeability measurements on tight sandstones with propped Fractures under stress using two different flow cells, allowing to localise and quantify the mechanical damage at the Fracture Face. The laboratory experiments revealed a permeability reduction of this rock-proppant system down to 77% of initial rock permeability at 50. MPa differential stress leading to a permeability reduction in the Fracture Face skin zone up to a factor of 6. Considerable mechanical damage at the rock-proppant interFace was already observed for stresses of about 5. MPa. Microstructure analysis identified quartz grain crushing, fines production, and pore space blocking at the Fracture Face causing the observed mechanically induced FFS. At higher stresses, damage and embedment of the ceramic proppants further reduces the Fracture permeability. Therefore, even low differential stresses, which are expected under in-situ conditions, may considerably affect the productivity of hydraulic proppant fracturing stimulation campaigns, in particular in unconventional reservoirs where the Fracture Face is considerably larger compared to conventional hydraulic stimulations. © 2010 Elsevier GmbH.
