The Experts below are selected from a list of 2079 Experts worldwide ranked by ideXlab platform

Lincoln Paterson - One of the best experts on this subject based on the ideXlab platform.

  • simulation of co2 migration for the planning of well test configurations at the south west hub project western australia
    Energy Procedia, 2017
    Co-Authors: Christopher P Green, Karsten Michael, Lincoln Paterson
    Abstract:

    Abstract Containment of injected CO 2 at the South West Hub project in Western Australia is dependent on non-structural trapping mechanisms in the 1500 m thick Wonnerup Member of the Lesueur Sandstone due to uncertainties regarding the sealing character of the ∼600 m thick overlying Yalgorup Member. Therefore, vertical migration distance and sweep efficiency and their impact on residual saturation and CO 2 dissolution need to be properly assessed through reservoir simulations. We find that conventional Darcy-flow reservoir simulations result in significantly different predictions of plume migration compared to invasion percolation modelling when injecting at the base of the Wonnerup Member. If numerical predictions of the fate of injected CO 2 are sensitive to the choice of model, care must be taken when selecting the methodology. One way to validate simulation predictions at a scale appropriate to the modelling is the use of well tests. In the Wonnerup Member a vertical migration test is recommended for consideration to confirm whether conventional reservoir simulations or percolation invasion modelling accurately predict the CO 2 migration processes at the site. This test would involve a small injection of CO 2 that is allowed to migrate upwards. The migration would be monitored with repeat pulsed Neutron Logging. This represents a new kind of test unique to the situation for the South West Hub site.

  • observations of carbon dioxide saturation distribution and residual trapping using core analysis and repeat pulsed Neutron Logging at the co2crc otway site
    International Journal of Greenhouse Gas Control, 2016
    Co-Authors: Tess Dance, Lincoln Paterson
    Abstract:

    Abstract Time-lapse pulsed-Neutron well Logging has been applied at the CO2CRC Otway site to measure changes in carbon dioxide saturation profiles across an injection interval. Three stages of contrasting saturation were logged: when the formation was fully water saturated; after CO2 was injected; and after water was injected to drive the CO2 to residual saturation. This allowed for a unique opportunity to observe changing fluid saturation responding to relative permeability hysteresis at the field scale as part of a controlled experiment. The high vertical resolution of the logs (

Carroll F. Knutson - One of the best experts on this subject based on the ideXlab platform.

  • Neutron Log Measurement of Moisture in Unsaturated Basalt: Progress and Problems
    Vadose Zone Journal, 2004
    Co-Authors: Catherine M. Helm-clark, Richard P. Smith, David W. Rodgers, Carroll F. Knutson
    Abstract:

    The research described here examines whether Neutron logs can be used in unsaturated basalt to quantitatively estimate moisture content, and, in tandem with other wireline logs, to determine the relative contribution to Neutron log response by minerals containing chemically bound H. Our results show that it should be possible to quantitatively correlate Neutron log response to the amount of both bound and unbound H regardless of saturated or unsaturated conditions. Such a correlation is possible only if bulk density, saturated porosity and Neutron log response are already known in saturated conditions. It is not yet known, however, what the exact form of this correlation should be. To evaluate the candidate correlation equations, we compare measured permeability in unsaturated basalts with the calculated H content derived from these correlations. As the result of this evaluation, we identify intervals of clay-free impermeable, unsaturated basalt with apparently high H content. The Neutron log response in these intervals may be caused by localized variations of the Neutron slowing-down length, L s , due to low concentration of H in the formation and borehole environment. When L s is greater than the source-detector spacing of a Neutron Logging tool, the Neutron log response can invert, resulting in potentially faulty interpretation of Neutron logs. These measurement uncertainties in unsaturated basalts might be overcome by using a Neutron Logging tool with both a higher-flux Neutron source and increased source-detector spacing, or a Neutron tool with several detectors placed at different spacing from the source.

  • Neutron Log Measurement of Moisture in Unsaturated Basalt
    Vadose Zone Journal, 2004
    Co-Authors: Catherine M. Helm-clark, Richard P. Smith, David W. Rodgers, Carroll F. Knutson
    Abstract:

    The research described here examines whether Neutron logs can be used in unsaturated basalt to quantitatively estimate moisture content, and, in tandem with other wireline logs, to determine the relative contribution to Neutron log response by minerals containing chemically bound H. Our results show that it should be possible to quantitatively correlate Neutron log response to the amount of both bound and unbound H regardless of saturated or unsaturated conditions. Such a correlation is possible only if bulk density, saturated porosity and Neutron log response are already known in saturated conditions. It is not yet known, however, what the exact form of this correlation should be. To evaluate the candidate correlation equations, we compare measured permeability in unsaturated basalts with the calculated H content derived from these correlations. As the result of this evaluation, we identify intervals of clay-free impermeable, unsaturated basalt with apparently high H content. The Neutron log response in these intervals may be caused by localized variations of the Neutron slowing-down length, L ₛ, due to low concentration of H in the formation and borehole environment. When L ₛ is greater than the source-detector spacing of a Neutron Logging tool, the Neutron log response can invert, resulting in potentially faulty interpretation of Neutron logs. These measurement uncertainties in unsaturated basalts might be overcome by using a Neutron Logging tool with both a higher-flux Neutron source and increased source-detector spacing, or a Neutron tool with several detectors placed at different spacing from the source.

Muhammad Hashim - One of the best experts on this subject based on the ideXlab platform.

  • Investigation of Petrophysical Properties for Yamamma Carbonate Formation
    2016
    Co-Authors: Fadhil Sarhan Kadhim, Ariffin Samsuri, Ahmad Kamal Idris, Haider Alwan, Muhammad Hashim
    Abstract:

    Given the knowledge of the rock type, porosity, Archie’s parameters and water saturation can be determined by using different Logging devices. For example, if a density Logging tool is to be used, the rock matrix density must be known in order to determine the porosity. Likewise, using sonic log for porosity determination, the known parameter must be the matrix travel time and for Neutron log, the parameter that must correspond to the rock type is the matrix setting for the Neutron Logging tool. Many equations have been developed over the years based on known physical principles or on empirically derived relationships, which are used to calculate porosity, resistivity, water saturation, and estimate the lithology. NS oilfield is one of giant oilfields in the Middle East, and the formation under study is the Yammama carbonate formation which is one of the deepest hydrocarbons bearing zone in NS oilfield. Neurology software (V 5, 2008) was used to digitize the scanned copies of the available logs. Environmental corrections had been made as per SLB charts 2005. Results show that the Yammama formation consists mainly of limestone, some dolomite as well as the average formation water resistivity (Rw = 0.0179), average mud filtrate resistivity (Rmf = 0.091), and Archie's parameters (m=1.94, n = 2

  • Investigation of Petrophysical Properties for Yamamma Carbonate Formation
    Mathematical Models and Methods in Applied Sciences, 2015
    Co-Authors: Fadhil Sarhan Kadhim, Ariffin Samsuri, Ahmad Kamal Idris, Haider Alwan, Muhammad Hashim
    Abstract:

    Given the knowledge of the rock type, porosity, Archie’s parameters and water saturation can be determined by using different Logging devices. For example, if a density Logging tool is to be used, the rock matrix density must be known in order to determine the porosity. Likewise, using sonic log for porosity determination, the known parameter must be the matrix travel time and for Neutron log, the parameter that must correspond to the rock type is the matrix setting for the Neutron Logging tool. Many equations have been developed over the years based on known physical principles or on empirically derived relationships, which are used to calculate porosity, resistivity, water saturation, and estimate the lithology. NS oilfield is one of giant oilfields in the Middle East, and the formation under study is the Yammama carbonate formation which is one of the deepest hydrocarbons bearing zone in NS oilfield. Neurology software (V 5, 2008) was used to digitize the scanned copies of the available logs. Environmental corrections had been made as per SLB charts 2005. Results show that the Yammama formation consists mainly of limestone, some dolomite as well as the average formation water resistivity (Rw= 0.0179), average mud filtrate resistivity (Rmf= 0.091), and Archie's parameters (m=1.94, n= 2, and a=0.7). While the porosity, true resistivity, and water saturation values with depth of formation were calculated. This study provides the cross-plots, which can be used to determined lithology of this reservoir and investigated petrophysical properties that should use to estimate original oil in place and detected the perforation zones.

Catherine M. Helm-clark - One of the best experts on this subject based on the ideXlab platform.

  • Neutron Log Measurement of Moisture in Unsaturated Basalt: Progress and Problems
    Vadose Zone Journal, 2004
    Co-Authors: Catherine M. Helm-clark, Richard P. Smith, David W. Rodgers, Carroll F. Knutson
    Abstract:

    The research described here examines whether Neutron logs can be used in unsaturated basalt to quantitatively estimate moisture content, and, in tandem with other wireline logs, to determine the relative contribution to Neutron log response by minerals containing chemically bound H. Our results show that it should be possible to quantitatively correlate Neutron log response to the amount of both bound and unbound H regardless of saturated or unsaturated conditions. Such a correlation is possible only if bulk density, saturated porosity and Neutron log response are already known in saturated conditions. It is not yet known, however, what the exact form of this correlation should be. To evaluate the candidate correlation equations, we compare measured permeability in unsaturated basalts with the calculated H content derived from these correlations. As the result of this evaluation, we identify intervals of clay-free impermeable, unsaturated basalt with apparently high H content. The Neutron log response in these intervals may be caused by localized variations of the Neutron slowing-down length, L s , due to low concentration of H in the formation and borehole environment. When L s is greater than the source-detector spacing of a Neutron Logging tool, the Neutron log response can invert, resulting in potentially faulty interpretation of Neutron logs. These measurement uncertainties in unsaturated basalts might be overcome by using a Neutron Logging tool with both a higher-flux Neutron source and increased source-detector spacing, or a Neutron tool with several detectors placed at different spacing from the source.

  • Neutron Log Measurement of Moisture in Unsaturated Basalt
    Vadose Zone Journal, 2004
    Co-Authors: Catherine M. Helm-clark, Richard P. Smith, David W. Rodgers, Carroll F. Knutson
    Abstract:

    The research described here examines whether Neutron logs can be used in unsaturated basalt to quantitatively estimate moisture content, and, in tandem with other wireline logs, to determine the relative contribution to Neutron log response by minerals containing chemically bound H. Our results show that it should be possible to quantitatively correlate Neutron log response to the amount of both bound and unbound H regardless of saturated or unsaturated conditions. Such a correlation is possible only if bulk density, saturated porosity and Neutron log response are already known in saturated conditions. It is not yet known, however, what the exact form of this correlation should be. To evaluate the candidate correlation equations, we compare measured permeability in unsaturated basalts with the calculated H content derived from these correlations. As the result of this evaluation, we identify intervals of clay-free impermeable, unsaturated basalt with apparently high H content. The Neutron log response in these intervals may be caused by localized variations of the Neutron slowing-down length, L ₛ, due to low concentration of H in the formation and borehole environment. When L ₛ is greater than the source-detector spacing of a Neutron Logging tool, the Neutron log response can invert, resulting in potentially faulty interpretation of Neutron logs. These measurement uncertainties in unsaturated basalts might be overcome by using a Neutron Logging tool with both a higher-flux Neutron source and increased source-detector spacing, or a Neutron tool with several detectors placed at different spacing from the source.

Tess Dance - One of the best experts on this subject based on the ideXlab platform.