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in creator/contributor: "Freifeld, B.M."  
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The U-tube: A new paradigm in borehole fluid sampling

Description: Fluid samples from deep boreholes can provide insights into subsurface physical, chemical, and biological conditions. Recovery of intact, minimally altered aliquots of subsurface fluids is required for analysis of aqueous chemistry, isotopic composition, and dissolved gases, and for microbial community characterization. Unfortunately, for many reasons, collecting geofluids poses a number of challenges, from formation contamination by drilling to maintaining integrity during recovery from depths… more
Date: October 1, 2009
Creator: Freifeld, B. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A Measurement System for Systematic Hydrological Characterization of Unsaturated Fractured Welded Tuff in a Mined Underground Tunnel

Description: A field investigation of unsaturated flow through a lithophysal unit of fractured welded tuff containing lithophysal cavities has been initiated. To characterize flow in this spatially heterogeneous medium, a systematic approach has been developed to perform tests in boreholes drilled at regular intervals in an underground tunnel (drift). In this paper, we describe the test equipment system that has been built for this purpose. Since the field-scale measurements, of liquid flow in the unsaturat… more
Date: November 21, 2001
Creator: Cook, P. J.; Salve, R.; Freifeld, B. M. & Tsang, Y. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Ground surface temperature reconstructions: Using in situ estimates for thermal conductivity acquired with a fiber-optic distributed thermal perturbation sensor

Description: We have developed a borehole methodology to estimate formation thermal conductivity in situ with a spatial resolution of one meter. In parallel with a fiber-optic distributed temperature sensor (DTS), a resistance heater is deployed to create a controlled thermal perturbation. The transient thermal data is inverted to estimate the formation's thermal conductivity. We refer to this instrumentation as a Distributed Thermal Perturbation Sensor (DTPS), given the distributed nature of the DTS measur… more
Date: October 10, 2008
Creator: Freifeld, B. M.; Finsterle, S.; Onstott, T. C.; Toole, P. & Pratt, L. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Reactive transport modeling to study changes in water chemistry induced by CO2 injection at the Frio-I brine pilot

Description: To demonstrate the potential for geologic storage of CO{sub 2} in saline aquifers, the Frio-I Brine Pilot was conducted, during which 1600 tons of CO{sub 2} were injected into a high-permeability sandstone and the resulting subsurface plume of CO{sub 2} was monitored using a variety of hydrogeological, geophysical, and geochemical techniques. Fluid samples were obtained before CO{sub 2} injection for baseline geochemical characterization, during the CO{sub 2} injection to track its breakthrough… more
Date: November 1, 2009
Creator: Kharaka, Y. K.; Doughty, C.; Freifeld, B. M.; Daley, T. M. & Xu, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Frio II Brine Pilot: Report on GEOSEQ Activities

Description: LBNL's GEOSEQ project is a key participant in the Frio IIbrine pilot studying geologic sequestration of CO2. During During theinjection phase of the Frio-II brine pilot, LBNL collected multiple datasets including seismic monitoring, hydrologic monitoring and geochemicalsampling. These data sets are summarized in this report including allCASSM (continuous active source seismic monitoring) travel time data,injection pressure and flow rate data and gaseous sampling and tracerdata. Additional resul… more
Date: November 17, 2007
Creator: Daley, T. M.; Freifeld, B.M.; Ajo-Franklin, J. B.; Doughty, C. & Benson, S. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

LUCI: A facility at DUSEL for large-scale experimental study of geologic carbon sequestration

Description: LUCI, the Laboratory for Underground CO{sub 2} Investigations, is an experimental facility being planned for the DUSEL underground laboratory in South Dakota, USA. It is designed to study vertical flow of CO{sub 2} in porous media over length scales representative of leakage scenarios in geologic carbon sequestration. The plan for LUCI is a set of three vertical column pressure vessels, each of which is {approx}500 m long and {approx}1 m in diameter. The vessels will be filled with brine and sa… more
Date: October 1, 2010
Creator: Peters, C. A.; Dobson, P. F.; Oldenburg, C. M.; Wang, J. S. Y.; Onstott, T. C.; Scherer, G. W. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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