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Health, Safety, and Environmental Screening and Ranking Frameworkfor Geologic CO2 Storage Site Selection

Description: This report describes a screening and ranking framework(SRF) developed to evaluate potential geologic carbon dioxide (CO2)storage sites on the basis of health, safety, and environmental (HSE)risk arising from possible CO2 leakage. The approach is based on theassumption that HSE risk due to CO2 leakage is dependent on three basiccharacteristics of a geologic CO2 storage site: (1) the potential forprimary containment by the target formation, (2) the potential forsecondary containment if the prima… more
Date: March 15, 2006
Creator: Oldenburg, Curtis M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Biologically Enhanced Carbon Sequestration: Research Needs and Opportunities

Description: Fossil fuel combustion, deforestation, and biomass burning are the dominant contributors to increasing atmospheric carbon dioxide (CO{sub 2}) concentrations and global warming. Many approaches to mitigating CO{sub 2} emissions are being pursued, and among the most promising are terrestrial and geologic carbon sequestration. Recent advances in ecology and microbial biology offer promising new possibilities for enhancing terrestrial and geologic carbon sequestration. A workshop was held October 2… more
Date: March 21, 2008
Creator: Oldenburg, Curtis; Oldenburg, Curtis M. & Torn, Margaret S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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T2LBM Version 1.0: Landfill bioreactor model for TOUGH2

Description: The need to control gas and leachate production and minimize refuse volume in landfills has motivated the development of landfill simulation models that can be used by operators to predict and design optimal treatment processes. T2LBM is a module for the TOUGH2 simulator that implements a Landfill Bioreactor Model to provide simulation capability for the processes of aerobic or anaerobic biodegradation of municipal solid waste and the associated flow and transport of gas and liquid through the … more
Date: May 22, 2001
Creator: Oldenburg, Curtis M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis of cause and mechanism for injection-induced seismicityat the Geysers Geothermal Field, California

Description: We analyzed relative contributions to the cause andmechanism of injection-induced seismicity at The Geysers geothermalfield, California, using coupled thermal-hydrological-mechanicalmodeling. Our analysis shows that the most important cause forinjection-induced seismicity is injection-induced cooling and associatedthermal-elastic shrinkage that changes the stress state in such a waythat mechanical failure and seismicity can be induced. Specifically, thecooling shrinkage results in unloading and… more
Date: June 14, 2007
Creator: Rutqvist, Jonny & Oldenburg, Curtis
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Joule-Thomson Cooling Due to CO2 Injection into Natural GasReservoirs

Description: Depleted natural gas reservoirs are a promising target for Carbon Sequestration with Enhanced Gas Recovery (CSEGR). The focus of this study is on evaluating the importance of Joule-Thomson cooling during CO2 injection into depleted natural gas reservoirs. Joule-Thomson cooling is the adiabatic cooling that accompanies the expansion of a real gas. If Joule-Thomson cooling were extreme, injectivity and formation permeability could be altered by the freezing of residual water,formation of hydrates… more
Date: April 21, 2006
Creator: Oldenburg, Curtis M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Perface: Research advances in vadose zone hydrology throughsimulations with the TOUGH codes

Description: Numerical simulators are playing an increasingly important role in advancing our fundamental understanding of hydrological systems. They are indispensable tools for managing groundwater resources, analyzing proposed and actual remediation activities at contaminated sites, optimizing recovery of oil, gas, and geothermal energy, evaluating subsurface structures and mining activities, designing monitoring systems, assessing the long-term impacts of chemical and nuclear waste disposal, and devising… more
Date: July 12, 2004
Creator: Finsterle, Stefan & Oldenburg, Curtis M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Atmospheric Dispersion Capability for T2VOC

Description: Atmospheric transport by variable-K theory dispersion has been added to T2VOC. The new code, T2VOCA, models flow and transport in the subsurface identically to T2VOC, but includes also the capability for modeling passive multicomponent variable-K theory dispersion in an atmospheric region assumed to be flat, horizontal, and with a logarithmic wind profile. The specification of the logarithmic wind profile in the T2VOC input file is automated through the use of a build code called ATMDISPV. The … more
Date: September 19, 2005
Creator: Oldenburg, Curtis M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Carbon sequestration in natural gas reservoirs: Enhanced gas recovery and natural gas storage

Description: Natural gas reservoirs are obvious targets for carbon sequestration by direct carbon dioxide (CO{sub 2}) injection by virtue of their proven record of gas production and integrity against gas escape. Carbon sequestration in depleted natural gas reservoirs can be coupled with enhanced gas production by injecting CO{sub 2} into the reservoir as it is being produced, a process called Carbon Sequestration with Enhanced Gas Recovery (CSEGR). In this process, supercritical CO{sub 2} is injected deep … more
Date: April 8, 2003
Creator: Oldenburg, Curtis M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Screening and Ranking Framework (SRF) for Geologic CO2 Storage Site Selection on the Basis of Hse Risk

Description: A screening and ranking framework (SRF) has been developedto evaluate potential geologic carbon dioxide (CO2) storage sites on thebasis of health, safety, and environmental (HSE) risk arising from CO2leakage. The approach is based on the assumption that CO2 leakage risk isdependent on three basic characteristics of a geologic CO2 storage site:(1) the potential for primary containment by the target formation; (2)the potential for secondary containment if the primary formation leaks;and (3) the p… more
Date: November 27, 2006
Creator: Oldenburg, Curtis M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Health, Safety, and Environmental Screening and Ranking Frameworkfor Geologic CO2 Storage Site Selection

Description: This report describes a screening and ranking framework(SRF) developed to evaluate potential geologic carbon dioxide (CO2) storage sites on the basis of health, safety, and environmental (HSE) risk arising from possible CO2 leakage. The approach is based on the assumption that HSE risk due to CO2 leakage is dependent on three basic characteristics of a geologic CO2 storage site: (1) the potential for primary containment by the target formation; (2) the potential for secondary containment if the… more
Date: September 19, 2005
Creator: Oldenburg, Curtis M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Double-diffusive convection in liquid-dominated geothermal systems with high-salinity brines

Description: Variations in temperature and salinity in hypersaline liquid-dominated geothermal systems like the Salton Sea Geothermal System (SSGS) tend to be correlated such that liquid density is relatively constant in the system. The tendency toward small density variations may be due to connectivity with a surrounding regional aquifer at multiple depths in the stratigraphic column. We present numerical simulation results for natural convection in geothermal systems like the SSGS in hydraulic connection … more
Date: January 20, 1994
Creator: Oldenburg, Curtis M.; Pruess, Karsten & Lippmann, Marcelo
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Leakage and Seepage in the Near-Surface Environment: An Integrated Approach to Monitoring and Detection

Description: Monitoring and detection of leakage and seepage of carbon dioxide (CO{sub 2}) in the near-surface environment is needed to ensure the safety and effectiveness of geologic carbon sequestration. Large leakage fluxes, e.g., through leaking wells, will be easier to detect and monitor than slow and diffuse leakage and seepage. The challenge of detecting slow leakage and seepage is discerning a leakage or seepage signal from within the natural background variations in CO{sub 2} concentration and flux… more
Date: December 18, 2003
Creator: Oldenburg, Curtis M. & Lewicki, Jennifer L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Site S-7 VOC Transport modeling for the Vadose Zone Monitoring System (VZMS), McClellan AFB - 1999 Semi-Annual Report

Description: Enhanced data analysis is continuing for the Vadose Zone Monitoring System (VZMS) installed at site S-7 in IC 34 at McClellan AFB. Air temperatures along with data from the four highest levels of thermistors in VZMS-A and B are used with an analytical solution for the heat conduction equation to show that heat transfer in the shallow vadose zone at S-7 is conduction-dominated. This analysis is extended to reveal that stiace temperature, i.e., the temperature of the concrete slab at S-7, is sign… more
Date: June 15, 1999
Creator: Doughty, Christine; Oldenburg, Curtis M. & James, April L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Multiphase Modeling of Flow, Transport, and Biodegradation in a Mesoscale Landfill Bioreactor

Description: The need to control gas and leachate production and minimize refuse volume in municipal solid waste landfills has motivated the development of landfill simulation models to predict and design optimal treatment processes. We have developed a multiphase and multicomponent nonisothermal module called T2LBM for the three-dimensional TOUGH2 flow and transport simulator. T2LBM can be used to simulate aerobic or anaerobic biodegradation of municipal solid waste and the associated flow and transport of… more
Date: February 1, 2002
Creator: Oldenburg, Curtis M.; Borglin, Sharon E. & Hazen, Terry C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Sequestration of Carbon Dioxide with Enhanced Gas Recovery-Case Study Altmark, North German Basin

Description: Geologic carbon dioxide storage is one strategy for reducingCO2 emissions into the atmosphere. Depleted natural gas reservoirs are anobvious target for CO2 storage due to their proven record of gascontainment. Germany has both large industrial sources of CO2 anddepleting gas reservoirs. The purpose of this report is to describe theanalysis and modeling performed to investigate the feasibility ofinjecting CO2 into nearly depleted gas reservoirs in the Altmark area inNorth Germany for geologic CO… more
Date: October 12, 2005
Creator: Rebscher, Dorothee & Oldenburg, Curtis M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Higher-order differencing for phase-front propagation in geothermal systems

Description: We are testing higher-order differencing total variation diminishing schemes implemented in the reservoir simulator TOUGH2 to reduce numerical dispersion of phase fronts in geothermal flow problems. The schemes are called total variation diminishing because they employ flux limiters to prevent spurious oscillations that sometimes occur with other higher-order differencing schemes near sharp fronts. Thus it appears that total variation diminishing schemes rely on an implicit assumption that the … more
Date: January 9, 1998
Creator: Oldenburg, Curtis & Pruess, Karsten
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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CO{sub 2} injection for enhanced gas production and carbon sequestration

Description: Analyses suggest that carbon dioxide (CO{sub 2}) can be injected into depleted gas reservoirs to enhance methane (CH{sub 4}) recovery for periods on the order of 10 years, while simultaneously sequestering large amounts of CO{sub 2}. Simulations applicable to the Rio Vista Gas Field in California show that mixing between CO{sub 2} and CH{sub 4} is slow relative to repressurization, and that vertical density stratification favors enhanced gas recovery.
Date: November 15, 2001
Creator: Oldenburg, Curtis M. & Benson, Sally M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Ferrofluid flow for TOUGH2

Description: We have developed EOS7M, a ferrofluid flow and transport module for TOUGH2. EOS7M calculates the magnetic forces on ferrofluid caused by an external magnetic field and allows simulation of flow and advective transport of ferrofluid-water mixtures through porous media. Such flow problems are strongly coupled and well suited to the TOUGH2 framework. Preliminary applications of EOS7M to some simple pressure and flow problems for which experiments were carried out in the lab show good qualitative a… more
Date: March 24, 1998
Creator: Oldenburg, Curtis & Moridis, George
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Predictions of long-term behavior of a large-volume pilot test for CO2 geological storage in a saline formation in the Central Valley, California

Description: The long-term behavior of a CO{sub 2} plume injected into a deep saline formation is investigated, focusing on mechanisms that lead to plume stabilization. Key measures are plume migration distance and the time evolution of CO{sub 2} phase-partitioning, which are examined by developing a numerical model of the subsurface at a proposed power plant with CO{sub 2} capture in the San Joaquin Valley, California, where a large-volume pilot test of CO{sub 2} injection will be conducted. The numerical … more
Date: November 1, 2008
Creator: Doughty, Christine; Myer, Larry R. & Oldenburg, Curtis M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The role of optimality in characterizing CO2 seepage from geological carbon sequestration sites

Description: Storage of large amounts of carbon dioxide (CO{sub 2}) in deep geological formations for greenhouse gas mitigation is gaining momentum and moving from its conceptual and testing stages towards widespread application. In this work we explore various optimization strategies for characterizing surface leakage (seepage) using near-surface measurement approaches such as accumulation chambers and eddy covariance towers. Seepage characterization objectives and limitations need to be defined carefully … more
Date: September 15, 2008
Creator: Cortis, Andrea; Oldenburg, Curtis M. & Benson, Sally M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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