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Evaluation of the Impact of CO2, Aqueous Fluid, and Reservoir Rock Interactions on the Geologic Sequestration of CO2 with Special Emphasis on Economic Implications

Description: Lowering the costs of front-end processes in the geologic sequestration of CO{sub 2} can dramatically lower the overall costs. One approach is to sequester less-pure CO{sub 2} waste streams that are less expensive or require less energy to separate from flue gas, a coal gasification process, etc. The objective of this research is to evaluate the impacts of an impure CO{sub 2} waste stream on geologic sequestration using both reaction progress and reactive transport simulators. The simulators se… more
Date: March 8, 2001
Creator: Knauss, K. G.; Johnson, J. W.; Steefel, C. I. & Nitao, J. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Modeling Fluid Flow and Electrical Resistivity in Fractured Geothermal Reservoir Rocks

Description: Phase change of pore fluid (boiling/condensing) in rock cores under conditions representative of geothermal reservoirs results in alterations of the electrical resistivity of the samples. In fractured samples, phase change can result in resistivity changes that are more than an order of magnitude greater than those measured in intact samples. These results suggest that electrical resistivity monitoring may provide a useful tool for monitoring the movement of water and steam within fractured geo… more
Date: January 14, 2003
Creator: Detwiler, R. L.; Roberts, J. J.; Ralph, W. & Bonner, B. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Electrical Resistivity as an Indicator of Saturation in Fractured Geothermal Reservoir Rocks: Experimental Data and Modeling

Description: The electrical resistivity of rock cores under conditions representative of geothermal reservoirs is strongly influenced by the state and phase (liquid/vapor) of the pore fluid. In fractured samples, phase change (vaporization/condensation) can result in resistivity changes that are more than an order of magnitude greater than those measured in intact samples. These results suggest that electrical resistivity monitoring of geothermal reservoirs may provide a useful tool for remotely detecting t… more
Date: June 23, 2003
Creator: Detwiler, R. L. & Roberts, J. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Laboratory and Field Measurements of Electrical Resistivity to Determine Saturation and Detect Fractures in a Heated Rock Mass

Description: Laboratory measurements of the electrical resistivity of intact and fractured representative geothermal reservoir rocks were performed to investigate the resistivity contrast caused by active boiling and to infer saturation and fracture location in a large-scale field test. Measurements were performed to simulate test conditions with confining pressures up to 100 bars and temperatures to 145 C. Measurements presented are a first step toward making the search for fractures using electrical metho… more
Date: April 3, 2001
Creator: Roberts, J. J.; Ramirez, A.; Carlson, S.; Ralph, W. & Bonner, B. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Fracture Surface Area Effects on Fluid Extraction and the Electrical Resistivity of Geothermal Reservoir Rocks

Description: Laboratory measurements of the electrical resistivity of fractured analogue geothermal reservoir rocks were performed to investigate the resistivity contrast caused by active boiling and to determine the effects of variable fracture dimensions and surface area on water extraction. Experiments were performed at confining pressures up to 10 h4Pa (100 bars) and temperatures to 170 C. Fractured samples show a larger resistivity change at the onset of boiling than intact samples. Monitoring the resi… more
Date: May 9, 2002
Creator: Roberts, J. J.; Detwiler, R. L.; Ralph, W. & Bonner, B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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An asymptotic model of seismic reflection from a permeable layer

Description: Analysis of compression wave propagation in a poroelastic medium predicts a peak of reflection from a high-permeability layer in the low-frequency end of the spectrum. An explicit formula expresses the resonant frequency through the elastic moduli of the solid skeleton, the permeability of the reservoir rock, the fluid viscosity and compressibility, and the reservoir thickness. This result is obtained through a low-frequency asymptotic analysis of Biot's model of poroelasticity. A review of the… more
Date: October 15, 2009
Creator: Silin, D. & Goloshubin, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A low-frequency asymptotic model of seismic reflection from a high-permeability layer

Description: Analysis of compression wave propagation through a high-permeability layer in a homogeneous poroelastic medium predicts a peak of reflection in the low-frequency end of the spectrum. An explicit formula expresses the resonant frequency through the elastic moduli of the solid skeleton, the permeability of the reservoir rock, the fluid viscosity and compressibility, and the reservoir thickness. This result is obtained through a low-frequency asymptotic analysis of the Biot's model of poroelastici… more
Date: March 1, 2009
Creator: Silin, Dmitriy & Goloshubin, Gennady
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Novel Approach to Experimental Studies of Mineral Dissolution Kinetics

Description: Currently, DOE is conducting pilot CO{sub 2} injection tests to evaluate the concept of geological sequestration. The injected CO{sub 2} is expected to react with the host rocks and these reactions can potentially alter the porosity, permeability, and mechanical properties of the host or cap rocks. Reactions can also result in precipitation of carbonate-containing minerals that favorably and permanently trap CO{sub 2} underground. Many numerical models have been used to predict these reactions … more
Date: August 31, 2008
Creator: Zhu, Chen
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Characterization and Alteration of Wettability States of Alaskan Reserviors to Improve Oil Recovery Efficiency (including the within-scope expansion based on Cyclic Water Injection - a pulsed waterflood for Enhanced Oil Recovery)

Description: Numerous early reports on experimental works relating to the role of wettability in various aspects of oil recovery have been published. Early examples of laboratory waterfloods show oil recovery increasing with increasing water-wetness. This result is consistent with the intuitive notion that strong wetting preference of the rock for water and associated strong capillary-imbibition forces gives the most efficient oil displacement. This report examines the effect of wettability on waterflooding… more
Date: December 31, 2008
Creator: Dandekar, Abhijit; Patil, Shirish & Khataniar, Santanu
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Mississippian Leadville Limestone Exploration Play, Utah and Colorado-Exploration Techniques and Studies for Independents

Description: The Mississippian (late Kinderhookian to early Meramecian) Leadville Limestone is a shallow, open-marine, carbonate-shelf deposit. The Leadville has produced over 53 million barrels (8.4 million m{sup 3}) of oil/condensate from seven fields in the Paradox fold and fault belt of the Paradox Basin, Utah and Colorado. The environmentally sensitive, 7500-square-mile (19,400 km{sup 2}) area that makes up the fold and fault belt is relatively unexplored. Only independent producers operate and continu… more
Date: September 30, 2008
Creator: Chidsey, Thomas
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Advancing New 3D Seismic Interpretation Methods for Exploration and Development of Fractured Tight Gas Reservoirs

Description: In a study funded by the U.S. Department of Energy and GeoSpectrum, Inc., new P-wave 3D seismic interpretation methods to characterize fractured gas reservoirs are developed. A data driven exploratory approach is used to determine empirical relationships for reservoir properties. Fractures are predicted using seismic lineament mapping through a series of horizon and time slices in the reservoir zone. A seismic lineament is a linear feature seen in a slice through the seismic volume that has neg… more
Date: January 31, 2005
Creator: Reeves, James
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The effects of gas-fluid-rock interactions on CO2 injection and storage: Insights from reactive transport modeling

Description: Possible means of reducing atmospheric CO{sub 2} emissions include injecting CO{sub 2} in petroleum reservoirs for Enhanced Oil Recovery or storing CO{sub 2} in deep saline aquifers. Large-scale injection of CO{sub 2} into subsurface reservoirs would induce a complex interplay of multiphase flow, capillary trapping, dissolution, diffusion, convection, and chemical reactions that may have significant impacts on both short-term injection performance and long-term fate of CO{sub 2} storage. Reacti… more
Date: October 15, 2008
Creator: Xiao, Y.; Xu, T. & Pruess, K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Fundamentals of Reservoir Surface Energy as Related to Surface Properties, Wettability, Capillary Action, and Oil Recovery from Fractured Reservoirs by Spontaneous Imbibition

Description: The objective of this project is to increase oil recovery from fractured reservoirs through improved fundamental understanding of the process of spontaneous imbibition by which oil is displaced from the rock matrix into the fractures. Spontaneous imbibition is fundamentally dependent on the reservoir surface free energy but this has never been investigated for rocks. In this project, the surface free energy of rocks will be determined by using liquids that can be solidified within the rock pore… more
Date: June 30, 2008
Creator: Morrow, Norman; Fischer, Herbert; Li, Yu; Mason, Geoffrey; Ruth, Douglas; Seth, Siddhartha et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Summary of Research through Phase II/Year 2 of Initially Approved 3 Phase/3 Year Project - Establishing the Relationship between Fracture-Related Dolomite and Primary Rock Fabric on the Distribution of Reservoirs in the Michigan Basin

Description: This final scientific/technical report covers the first 2 years (Phases I and II of an originally planned 3 Year/3 Phase program). The project was focused on evaluating the relationship between fracture-related dolomite and dolomite constrained by primary rock fabric in the 3 most prolific reservoir intervals in the Michigan Basin. The characterization of select dolomite reservoirs was the major focus of our efforts in Phases I and II of the project. Structural mapping and log analysis in the D… more
Date: September 30, 2007
Creator: Grammer, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Improving Gas Flooding Efficiency

Description: This study focuses on laboratory studies with related analytical and numerical models, as well as work with operators for field tests to enhance our understanding of and capabilities for more efficient enhanced oil recovery (EOR). Much of the work has been performed at reservoir conditions. This includes a bubble chamber and several core flood apparatus developed or modified to measure interfacial tension (IFT), critical micelle concentration (CMC), foam durability, surfactant sorption at reser… more
Date: March 31, 2008
Creator: Grigg, Reid; Svec, Robert; Zeng, Zheng; Mikhalin, Alexander; Lin, Yi; Yin, Guoqiang et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of a Geologic Exploration Model foe the Permo-Pennsylvanian Petroleum System in South-Central Montana

Description: Eolian sands are the main Pennsylvanian Tensleep Sandstone reservoir rocks, and were deposited in a near-shore environment interbedded with near-shore marine and sabkha calcareous and dolomitic rocks. Within the Tensleep, numerous cycles are characterized by basal marine or sabkha calcareous sandstone or dolomitic sandstone overlain by porous and permeable eolian sandstone, which in turn is capped by marine sandstone. The cycles represent the interplay of near-shore marine, sabkha, and eolian e… more
Date: June 30, 2007
Creator: Lopez, David A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Cost Effective Surfactant Formulations for Improved Oil Recovery in Carbonate Reservoirs

Description: This report summarizes work during the 30 month time period of this project. This was planned originally for 3-years duration, but due to its financial limitations, DOE halted funding after 2 years. The California Institute of Technology continued working on this project for an additional 6 months based on a no-cost extension granted by DOE. The objective of this project is to improve the performance of aqueous phase formulations that are designed to increase oil recovery from fractured, oil-we… more
Date: September 30, 2007
Creator: Goddard, William A.; Tang, Yongchun; Shuler, Patrick; Blanco, Mario & Wu, Yongfu
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Geochemical Enhancement Of Enhanced Geothermal System Reservoirs: An Integrated Field And Geochemical Approach

Description: The geochemical effects of injecting fluids into geothermal reservoirs are poorly understood and may be significantly underestimated. Decreased performance of injection wells has been observed in several geothermal fields after only a few years of service, but the reasons for these declines has not been established. This study had three primary objectives: 1) determine the cause(s) of the loss of injectivity; 2) utilize these observations to constrain numerical models of water-rock interactions… more
Date: December 31, 2007
Creator: Moore, Joseph N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Laser Drilling - Drilling with the Power of Light

Description: Gas Technology Institute (GTI) has been the leading investigator in the field of high power laser applications research for well construction and completion applications. Since 1997, GTI (then as Gas Research Institute- GRI) has investigated several military and industrial laser systems and their ability to cut and drill into reservoir type rocks. In this report, GTI continues its investigation with a 5.34 kW ytterbium-doped multi-clad high power fiber laser (HPFL). When compared to its competi… more
Date: February 28, 2007
Creator: Salehi, Iraj A.; Gahan, Brian C. & Batarseh, Samih
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

ABSTRACT: Upscaling Fracture Properties in Support of Dual-permeability Simulations

Description: Rainier Mesa (RM) is a tuffaceous, high-elevation plateau on the Nevada Test Site (NTS) that has been subjected to numerous nuclear tests between 1957 and 1992. Unlike other tests on the NTS located within or just above the saturated zone, tests at the RM T-tunnel complex were conducted within a variably saturated sequence of bedded and non-welded vitric and zeolitized tuff units, located approximately 500 m above the regional groundwater flow system. The low permeability and high porosity of t… more
Date: September 15, 2008
Creator: Parashar, Rishi & Reeves, Donald M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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PH Sensitive Polymers for Improving Reservoir Sweep and Conformance Control in Chemical Flooring

Description: There is an increasing opportunity to recover bypassed oil from depleted, mature oilfields in the US. The recovery factor in many reservoirs is low due to inefficient displacement of the oil by injected fluids (typically water). The use of chemical flooding methods to increase recovery efficiencies is severely constrained by the inability of the injected chemicals to contact the bypassed oil. Low sweep efficiencies are the primary cause of low oil recoveries observed in the field in chemical fl… more
Date: March 31, 2008
Creator: Sharma, Mukul; Bryant, Steven & Huh, Chun
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Temporal changes in noble gas compositions within the Aidlinsector ofThe Geysers geothermal system

Description: The use of nonreactive isotopic tracers coupled to a full thermal-hydrological reservoir simulation allows for an improved method of investigating how reservoir fluids contained within matrix and fractures contribute over time to fluids produced from geothermal systems. A combined field and modeling study has been initiated to evaluate the effects of injection, production, and fracture-matrix interaction on produced noble gas contents and isotopic ratios. Gas samples collected periodically from… more
Date: May 3, 2006
Creator: Dobson, Patrick; Sonnenthal, Eric; Kennedy, Mack; van Soest,Thijs & Lewicki, Jennifer
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A Systems Approach to Identifying Exploration and Development Opportunities in the Illinois Basin: Digital Portifolio of Plays in Underexplored Lower Paleozoic Rocks

Description: This study examined petroleum occurrence in Ordovician, Silurian and Devonian reservoirs in the Illinois Basin. Results from this project show that there is excellent potential for additional discovery of petroleum reservoirs in these formations. Numerous exploration targets and exploration strategies were identified that can be used to increase production from these underexplored strata. Some of the challenges to exploration of deeper strata include the lack of subsurface data, lack of underst… more
Date: June 30, 2008
Creator: Seyler, Beverly; Harris, David; Keith, Brian; Huff, Bryan & Lasemi, Yaghoob
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Major Oil Plays In Utah And Vicinity

Description: Utah oil fields have produced over 1.33 billion barrels (211 million m{sup 3}) of oil and hold 256 million barrels (40.7 million m{sup 3}) of proved reserves. The 13.7 million barrels (2.2 million m3) of production in 2002 was the lowest level in over 40 years and continued the steady decline that began in the mid-1980s. However, in late 2005 oil production increased, due, in part, to the discovery of Covenant field in the central Utah Navajo Sandstone thrust belt ('Hingeline') play, and to inc… more
Date: December 31, 2007
Creator: Chidsey, Thomas
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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