The Experts below are selected from a list of 222 Experts worldwide ranked by ideXlab platform
Dominique Van Gent - One of the best experts on this subject based on the ideXlab platform.
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South West Hub CCS Project in Western Australia – Characterisation of a Greenfield Site.
Energy Procedia, 2020Co-Authors: Linda Stalker, Dominique Van GentAbstract:Abstract The South West Hub Project (SWH) is undergoing pre-feasibility assessment through a stage-gated program of data acquisition, managed currently by the Western Australia Department of Mines and Petroleum (WA DMP). Undergoing assessment for potential to store commercial quantities of CO 2 is an area of approximately 150 km 2 north of the town of Harvey in south west Western Australia. The emissions hub of Collie (∼ 70 km to the SE) is the home to some likely users of the pore space if the Site proves up. In contrast to many potential storage projects, the area under investigation had undergone only limited geological evaluation prior to this project's initiation in 2007. Therefore a program of data acquisition has had to be developed and undertaken to populate an essentially Greenfield Site, to provide sufficient information to make informed decisions prior to proceeding through each stage gate. Activities to date have included: • A 2D seismic survey (2011) along local roads, which enabled the placement of a stratigraphic well. • The drilling of the Harvey-1 stratigraphic well (2012) to a depth of 2920.5 m TVDSS. • Research projects have then been commissioned to utilise these new materials and provide additional Site characterisation. • A small scale 2D seismic survey (December, 2013) to aid in definition of acquisition parameters for a subsequent • 3D seismic survey conducted, taking in 115 km 2 of the approximate 150 km 2 area (February – March, 2014). Results from these activities so far have not presented the project with any “show-stoppers”. The key intervals of interest, the Yalgorup and Wonnerup members of the Triassic Lesueur Formation show suitable rock properties for purposes of carbon storage. Fault identification and their modeled transmissivity do not indicate extensive compartmentalization in the storage region. Whilst the key to this project is residual trapping (Wonnerup as the primary containment interval and Yalgorup as the secondary containment interval) there is improved evidence to suggest the presence of potential baffles and seals in the area to retain the CO 2 . As at mid-2014, the plan forward will include: • 3D seismic processing, interpretation and the building of a new geological model (underway mid - 2014). • Drilling of three shallow wells to better characterise the upper layers (2014 - 2015). • Flow testing of one of those three wells to better assess the potential baffles (2015). • Drilling of a deeper well(s) to characterise the reservoir properties off the Harvey Ridge Structure (late 2015). • Related research activities using the new materials generated from the upcoming well drilling and testing program. The recently acquired 3D seismic survey is already providing valuable information to constrain the main formations distribution and aiding in the location of the likely areas for further data acquisition. Complementary research projects are ongoing to facilitate the valuation of the Site with the aim of reducing risk and uncertainty as the project proceeds to the next stage gate. It is hoped that by using a stage-gate approach, the pre-feasibility data acquisition will be focused and provide a lower cost and more rapid approach to assessing Sites in future.
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south west hub ccs project in western australia characterisation of a Greenfield Site
Energy Procedia, 2014Co-Authors: Linda Stalker, Dominique Van GentAbstract:Abstract The South West Hub Project (SWH) is undergoing pre-feasibility assessment through a stage-gated program of data acquisition, managed currently by the Western Australia Department of Mines and Petroleum (WA DMP). Undergoing assessment for potential to store commercial quantities of CO 2 is an area of approximately 150 km 2 north of the town of Harvey in south west Western Australia. The emissions hub of Collie (∼ 70 km to the SE) is the home to some likely users of the pore space if the Site proves up. In contrast to many potential storage projects, the area under investigation had undergone only limited geological evaluation prior to this project's initiation in 2007. Therefore a program of data acquisition has had to be developed and undertaken to populate an essentially Greenfield Site, to provide sufficient information to make informed decisions prior to proceeding through each stage gate. Activities to date have included: • A 2D seismic survey (2011) along local roads, which enabled the placement of a stratigraphic well. • The drilling of the Harvey-1 stratigraphic well (2012) to a depth of 2920.5 m TVDSS. • Research projects have then been commissioned to utilise these new materials and provide additional Site characterisation. • A small scale 2D seismic survey (December, 2013) to aid in definition of acquisition parameters for a subsequent • 3D seismic survey conducted, taking in 115 km 2 of the approximate 150 km 2 area (February – March, 2014). Results from these activities so far have not presented the project with any “show-stoppers”. The key intervals of interest, the Yalgorup and Wonnerup members of the Triassic Lesueur Formation show suitable rock properties for purposes of carbon storage. Fault identification and their modeled transmissivity do not indicate extensive compartmentalization in the storage region. Whilst the key to this project is residual trapping (Wonnerup as the primary containment interval and Yalgorup as the secondary containment interval) there is improved evidence to suggest the presence of potential baffles and seals in the area to retain the CO 2 . As at mid-2014, the plan forward will include: • 3D seismic processing, interpretation and the building of a new geological model (underway mid - 2014). • Drilling of three shallow wells to better characterise the upper layers (2014 - 2015). • Flow testing of one of those three wells to better assess the potential baffles (2015). • Drilling of a deeper well(s) to characterise the reservoir properties off the Harvey Ridge Structure (late 2015). • Related research activities using the new materials generated from the upcoming well drilling and testing program. The recently acquired 3D seismic survey is already providing valuable information to constrain the main formations distribution and aiding in the location of the likely areas for further data acquisition. Complementary research projects are ongoing to facilitate the valuation of the Site with the aim of reducing risk and uncertainty as the project proceeds to the next stage gate. It is hoped that by using a stage-gate approach, the pre-feasibility data acquisition will be focused and provide a lower cost and more rapid approach to assessing Sites in future.
Linda Stalker - One of the best experts on this subject based on the ideXlab platform.
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South West Hub CCS Project in Western Australia – Characterisation of a Greenfield Site.
Energy Procedia, 2020Co-Authors: Linda Stalker, Dominique Van GentAbstract:Abstract The South West Hub Project (SWH) is undergoing pre-feasibility assessment through a stage-gated program of data acquisition, managed currently by the Western Australia Department of Mines and Petroleum (WA DMP). Undergoing assessment for potential to store commercial quantities of CO 2 is an area of approximately 150 km 2 north of the town of Harvey in south west Western Australia. The emissions hub of Collie (∼ 70 km to the SE) is the home to some likely users of the pore space if the Site proves up. In contrast to many potential storage projects, the area under investigation had undergone only limited geological evaluation prior to this project's initiation in 2007. Therefore a program of data acquisition has had to be developed and undertaken to populate an essentially Greenfield Site, to provide sufficient information to make informed decisions prior to proceeding through each stage gate. Activities to date have included: • A 2D seismic survey (2011) along local roads, which enabled the placement of a stratigraphic well. • The drilling of the Harvey-1 stratigraphic well (2012) to a depth of 2920.5 m TVDSS. • Research projects have then been commissioned to utilise these new materials and provide additional Site characterisation. • A small scale 2D seismic survey (December, 2013) to aid in definition of acquisition parameters for a subsequent • 3D seismic survey conducted, taking in 115 km 2 of the approximate 150 km 2 area (February – March, 2014). Results from these activities so far have not presented the project with any “show-stoppers”. The key intervals of interest, the Yalgorup and Wonnerup members of the Triassic Lesueur Formation show suitable rock properties for purposes of carbon storage. Fault identification and their modeled transmissivity do not indicate extensive compartmentalization in the storage region. Whilst the key to this project is residual trapping (Wonnerup as the primary containment interval and Yalgorup as the secondary containment interval) there is improved evidence to suggest the presence of potential baffles and seals in the area to retain the CO 2 . As at mid-2014, the plan forward will include: • 3D seismic processing, interpretation and the building of a new geological model (underway mid - 2014). • Drilling of three shallow wells to better characterise the upper layers (2014 - 2015). • Flow testing of one of those three wells to better assess the potential baffles (2015). • Drilling of a deeper well(s) to characterise the reservoir properties off the Harvey Ridge Structure (late 2015). • Related research activities using the new materials generated from the upcoming well drilling and testing program. The recently acquired 3D seismic survey is already providing valuable information to constrain the main formations distribution and aiding in the location of the likely areas for further data acquisition. Complementary research projects are ongoing to facilitate the valuation of the Site with the aim of reducing risk and uncertainty as the project proceeds to the next stage gate. It is hoped that by using a stage-gate approach, the pre-feasibility data acquisition will be focused and provide a lower cost and more rapid approach to assessing Sites in future.
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south west hub ccs project in western australia characterisation of a Greenfield Site
Energy Procedia, 2014Co-Authors: Linda Stalker, Dominique Van GentAbstract:Abstract The South West Hub Project (SWH) is undergoing pre-feasibility assessment through a stage-gated program of data acquisition, managed currently by the Western Australia Department of Mines and Petroleum (WA DMP). Undergoing assessment for potential to store commercial quantities of CO 2 is an area of approximately 150 km 2 north of the town of Harvey in south west Western Australia. The emissions hub of Collie (∼ 70 km to the SE) is the home to some likely users of the pore space if the Site proves up. In contrast to many potential storage projects, the area under investigation had undergone only limited geological evaluation prior to this project's initiation in 2007. Therefore a program of data acquisition has had to be developed and undertaken to populate an essentially Greenfield Site, to provide sufficient information to make informed decisions prior to proceeding through each stage gate. Activities to date have included: • A 2D seismic survey (2011) along local roads, which enabled the placement of a stratigraphic well. • The drilling of the Harvey-1 stratigraphic well (2012) to a depth of 2920.5 m TVDSS. • Research projects have then been commissioned to utilise these new materials and provide additional Site characterisation. • A small scale 2D seismic survey (December, 2013) to aid in definition of acquisition parameters for a subsequent • 3D seismic survey conducted, taking in 115 km 2 of the approximate 150 km 2 area (February – March, 2014). Results from these activities so far have not presented the project with any “show-stoppers”. The key intervals of interest, the Yalgorup and Wonnerup members of the Triassic Lesueur Formation show suitable rock properties for purposes of carbon storage. Fault identification and their modeled transmissivity do not indicate extensive compartmentalization in the storage region. Whilst the key to this project is residual trapping (Wonnerup as the primary containment interval and Yalgorup as the secondary containment interval) there is improved evidence to suggest the presence of potential baffles and seals in the area to retain the CO 2 . As at mid-2014, the plan forward will include: • 3D seismic processing, interpretation and the building of a new geological model (underway mid - 2014). • Drilling of three shallow wells to better characterise the upper layers (2014 - 2015). • Flow testing of one of those three wells to better assess the potential baffles (2015). • Drilling of a deeper well(s) to characterise the reservoir properties off the Harvey Ridge Structure (late 2015). • Related research activities using the new materials generated from the upcoming well drilling and testing program. The recently acquired 3D seismic survey is already providing valuable information to constrain the main formations distribution and aiding in the location of the likely areas for further data acquisition. Complementary research projects are ongoing to facilitate the valuation of the Site with the aim of reducing risk and uncertainty as the project proceeds to the next stage gate. It is hoped that by using a stage-gate approach, the pre-feasibility data acquisition will be focused and provide a lower cost and more rapid approach to assessing Sites in future.
L.a.l. Corner - One of the best experts on this subject based on the ideXlab platform.
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Tuberculosis in cattle herds are sentinels for infection in European badgers : the Irish Greenfield Study
Veterinary Microbiology, 2011Co-Authors: D. Murphy, E. Gormley, D.m. Collins, G. Mcgrath, E. Sovsic, E. Costello, L.a.l. CornerAbstract:In Ireland badgers are removed in response to tuberculosis (TB) breakdowns in cattle herds (focal culling). Prevalence studies, conducted using a detailed post mortem and bacteriological examination, showed that 36-50% of badgers were infected with . Focal culling forms part of the medium term national strategy for the control of bovine TB in cattle and is based on the premise that badgers in areas with herd breakdowns have a higher prevalence of infection than the badger population at large. However, the hypothesis that cattle can be used as sentinels for infection in the badger population has never been formally tested. In this study we tested the hypothesis by determining the infection prevalence in badgers in areas where there had been historically, a consistently low prevalence of infection in cattle. Low cattle TB prevalence areas were defined as those herds with ≤ 2 standard reactors in the annual round of skin testing over the preceding 5years (Greenfield Sites). Using GIS, and adjusting for variation in land use, previous culling and cattle density, 198 Greenfield Sites were identified and surveyed, and 138 areas with badger setts or signs of badger activity were identified. A single badger was removed from 87 Sites and all were examined using detailed post mortem and bacteriological procedures. A prevalence of infection of 14.9% was found in the Greenfield Site badgers. This prevalence was significantly lower (
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Tuberculosis in cattle herds are sentinels for Mycobacterium bovis infection in European badgers (Meles meles): the Irish Greenfield Study.
Veterinary microbiology, 2011Co-Authors: D. Murphy, E. Gormley, D.m. Collins, G. Mcgrath, E. Sovsic, E. Costello, L.a.l. CornerAbstract:In Ireland badgers are removed in response to tuberculosis (TB) breakdowns in cattle herds (focal culling). Prevalence studies, conducted using a detailed post mortem and bacteriological examination, showed that 36-50% of badgers were infected with Mycobacterium bovis. Focal culling forms part of the medium term national strategy for the control of bovine TB in cattle and is based on the premise that badgers in areas with herd breakdowns have a higher prevalence of infection than the badger population at large. However, the hypothesis that cattle can be used as sentinels for infection in the badger population has never been formally tested. In this study we tested the hypothesis by determining the infection prevalence in badgers in areas where there had been historically, a consistently low prevalence of infection in cattle. Low cattle TB prevalence areas were defined as those herds with ≤ 2 standard reactors in the annual round of skin testing over the preceding 5 years (Greenfield Sites). Using GIS, and adjusting for variation in land use, previous culling and cattle density, 198 Greenfield Sites were identified and surveyed, and 138 areas with badger setts or signs of badger activity were identified. A single badger was removed from 87 Sites and all were examined using detailed post mortem and bacteriological procedures. A prevalence of M. bovis infection of 14.9% was found in the Greenfield Site badgers. This prevalence was significantly lower (P
J. R. Standing - One of the best experts on this subject based on the ideXlab platform.
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Predicting tunnelling-induced ground movements and interpreting field measurements using numerical analysis: Crossrail case study at Hyde Park
Geotechnique, 2020Co-Authors: V. Avgerinos, David M. Potts, J. R. StandingAbstract:Ground response to the construction of the Crossrail tunnels in London Clay beneath Hyde Park has been modelled numerically using advanced finite-element analyses. The soil model used for modelling the London Clay was a kinematic hardening soil model (named M2-SKH). This model, when used for the St James's Park Greenfield Site, provided excellent predictions of tunnelling-induced ground movements. Comparison of the results from the analysis of the Hyde Park Greenfield Site with associated field monitoring data also suggests excellent predictions, even though in this case the tunnels were: of larger diameter; deeper in the London Clay; and constructed with earth-pressure-balance machines. The influence of lining permeability was found to influence significantly short- and longer-term predictions. Interpretation of the predicted surface and subsurface vertical and horizontal displacements due to the construction of the Crossrail tunnels exemplifies how numerical analysis can assist in explaining and identif...
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Predicting tunnelling-induced ground movements and interpreting field measurements using numerical analysis: Crossrail case study at Hyde Park
Géotechnique, 2020Co-Authors: V. Avgerinos, David M. Potts, J. R. StandingAbstract:Ground response to the construction of the Crossrail tunnels in London Clay beneath Hyde Park has been modelled numerically using advanced finite-element analyses. The soil model used for modelling the London Clay was a kinematic hardening soil model (named M2-SKH). This model, when used for the St James's Park Greenfield Site, provided excellent predictions of tunnelling-induced ground movements. Comparison of the results from the analysis of the Hyde Park Greenfield Site with associated field monitoring data also suggests excellent predictions, even though in this case the tunnels were: of larger diameter; deeper in the London Clay; and constructed with earth-pressure-balance machines. The influence of lining permeability was found to influence significantly short- and longer-term predictions. Interpretation of the predicted surface and subsurface vertical and horizontal displacements due to the construction of the Crossrail tunnels exemplifies how numerical analysis can assist in explaining and identifying potential ambiguities in field measurements
D. Murphy - One of the best experts on this subject based on the ideXlab platform.
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Tuberculosis in cattle herds are sentinels for infection in European badgers : the Irish Greenfield Study
Veterinary Microbiology, 2011Co-Authors: D. Murphy, E. Gormley, D.m. Collins, G. Mcgrath, E. Sovsic, E. Costello, L.a.l. CornerAbstract:In Ireland badgers are removed in response to tuberculosis (TB) breakdowns in cattle herds (focal culling). Prevalence studies, conducted using a detailed post mortem and bacteriological examination, showed that 36-50% of badgers were infected with . Focal culling forms part of the medium term national strategy for the control of bovine TB in cattle and is based on the premise that badgers in areas with herd breakdowns have a higher prevalence of infection than the badger population at large. However, the hypothesis that cattle can be used as sentinels for infection in the badger population has never been formally tested. In this study we tested the hypothesis by determining the infection prevalence in badgers in areas where there had been historically, a consistently low prevalence of infection in cattle. Low cattle TB prevalence areas were defined as those herds with ≤ 2 standard reactors in the annual round of skin testing over the preceding 5years (Greenfield Sites). Using GIS, and adjusting for variation in land use, previous culling and cattle density, 198 Greenfield Sites were identified and surveyed, and 138 areas with badger setts or signs of badger activity were identified. A single badger was removed from 87 Sites and all were examined using detailed post mortem and bacteriological procedures. A prevalence of infection of 14.9% was found in the Greenfield Site badgers. This prevalence was significantly lower (
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Tuberculosis in cattle herds are sentinels for Mycobacterium bovis infection in European badgers (Meles meles): the Irish Greenfield Study.
Veterinary microbiology, 2011Co-Authors: D. Murphy, E. Gormley, D.m. Collins, G. Mcgrath, E. Sovsic, E. Costello, L.a.l. CornerAbstract:In Ireland badgers are removed in response to tuberculosis (TB) breakdowns in cattle herds (focal culling). Prevalence studies, conducted using a detailed post mortem and bacteriological examination, showed that 36-50% of badgers were infected with Mycobacterium bovis. Focal culling forms part of the medium term national strategy for the control of bovine TB in cattle and is based on the premise that badgers in areas with herd breakdowns have a higher prevalence of infection than the badger population at large. However, the hypothesis that cattle can be used as sentinels for infection in the badger population has never been formally tested. In this study we tested the hypothesis by determining the infection prevalence in badgers in areas where there had been historically, a consistently low prevalence of infection in cattle. Low cattle TB prevalence areas were defined as those herds with ≤ 2 standard reactors in the annual round of skin testing over the preceding 5 years (Greenfield Sites). Using GIS, and adjusting for variation in land use, previous culling and cattle density, 198 Greenfield Sites were identified and surveyed, and 138 areas with badger setts or signs of badger activity were identified. A single badger was removed from 87 Sites and all were examined using detailed post mortem and bacteriological procedures. A prevalence of M. bovis infection of 14.9% was found in the Greenfield Site badgers. This prevalence was significantly lower (P
