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in subjects: "Porosity"

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Compilation of cores and cuttings from U. S. Government-sponsored geothermal wells

This compendium lists the repositories holding geothermal core and well cuttings from US government-sponsored geothermal wells. Also, a partial listing of cores and cutting from these wells is tabulated, along with referenced reports and location maps. These samples are available to the public for research investigations and studies, usually following submission of an appropriate request for use of the samples. The purpose of this compilation is to serve as a possible source of cores and cuttin… more

Date: July 1, 1980

Creator: Mathews, M.; Gambill, D.T. & Rowley, J.C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

High temperature ceramic membrane reactors for coal liquid upgrading

In this project we intend to study a novel process concept, i.e, the use of ceramic membranes reactors in upgrading of coal derived liquids. Membrane reactors have been used in a number of catalytic reaction processes in order to overcome the limitations on conversion imposed by thermodynamic equilibrium. They have, furthermore, the inherent capability for combining reaction and separation in a single step. Thus they offer promise for improving and optimizing yield, selectivity and performance … more

Date: January 1, 1992

Creator: Tsotsis, T.T.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Chemical Engineering Division. Coal technology semiannual report, January--June 1975. [Coal gasification; catalytic activity of coal ash]

No Description Available.

Date: July 1, 1975

Creator: Fischer, J.; Che, S.; Lo, R.; Nandi, S.; Young, J. & Jonke, A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

High temperature ceramic membrane reactors for coal liquid upgrading

In this project we will study a novel process concept, i.e., the use of ceramic membrane reactors in upgrading of coal model compounds and coal derived liquids. In general terms, the USC research team is responsible for constructing and operating the membrane reactor apparatus and for testing various inorganic membranes for the upgrading of coal derived asphaltenes and coal model compounds. The USC effort will involve the principal investigator of this project and two graduate research assistan… more

Date: January 1, 1992

Creator: Tsotsis, T.T.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Research, development and demonstration of nickel-iron batteries for electric vehicle propulsion. Annual report for 1979

Research progress in the development of Ni/Fe batteries (electrodes in particular) for the period is described. The negative plate demonstrated a reliable lifetime of almost 1000 cycles; 20 mm positive plates were proved feasible; prototype cells yielded output at about 50 Wh/kg and 100 Wh/liter; program goals of 20% greater than these figures appear feasible. 27 figures, 20 tables. (RWR)

Date: June 1, 1980

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

A design of experiment study of plasma sprayed alumina-titania coatings

An experimental study of the plasma spraying of alumina-titania powder is presented in this paper. This powder system is being used to fabricate heater tubes that emulate nuclear fuel tubes for use in thermal-hydraulic testing. Coating experiments were conducted using a Taguchi fractional-factorial design parametric study. Operating parameters were varied around the typical spray parameters in a systematic design of experiments in order to display the range of plasma processing conditions and t… more

Date: January 1, 1992

Creator: Steeper, T. J. (Du Pont de Nemours (E.I.) and Co., Aiken, SC (United States). Savannah River Lab.); Varacalle, D. J. Jr.; Wilson, G. C. (EG and G Idaho, Inc., Idaho Falls, ID (United States)); Riggs, W. L. II (Tubal Cain Co., Loveland, OH (United States)); Rotolico, A. J. & Nerz, J. E. (Metco/Perkin-Elmer, Westbury, NY (United States))

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Conceptual design of a laser-fusion power plant. Part II. Two technical options: 1. JADE reactor; 2. Heat transfer by heat pipes

A laser fusion reactor concept is described that employs liquid metal walls. The concept envisions a porous medium, called the JADE, of specific geometry lining the reactor cavity. Some advantages and disadvantages of the concept are pointed out. The possibility of using heat pipes for passive cooling in ICF reactors is discussed. Some of the problems are outlined. (MOW)

Date: July 1, 1981

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Modeling of coupled geochemical and transport processes: An overview

Early coupled models associated with fluid flow and solute transport have been limited by assumed conditions of constant temperature, fully saturated fluid flow, and constant pore fluid velocity. Developments including coupling of chemical reactions to variable fields of temperature and fluid flow have generated new requirements for experimental data. As the capabilities of coupled models expand, needs are created for experimental data to be used for both input and validation. 25 refs.

Date: October 1, 1989

Creator: Carnahan, C.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Geothermal Injection Monitoring Project. Phase I status report, April 1981-April 1982

The feasibility of using remote geophysical techniques to monitor the movement of injected brine has been evaluated. It was established that no single approach is likely to be identified that can be used to accurately monitor the precise location of the injected fluid. Several approaches have been considered in parallel because they add new dimensions to the existing monitoring capabilities, and are likely to cover a range of applications at a variety of geothermal sites. These include: microse… more

Date: August 13, 1982

Creator: Younker, L.; Hanson, J.; Didwall, E.; Kasameyer, P.; Smith, A.; Hearst, J. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Small-angle x-ray scattering studies of the porosity of coals and chars. Quarterly progress report, July 1-September 30, 1980

Considerable effort has been devoted to checking and verifying some of the preliminary data reported previously. The technique employed in the past for measuring the x-ray transmission of the samples has been modified to provide more accurate values of the transmission. These transmission measurements are important for quantitative interpretation of the scattering data both because they are needed to determine the amount of background scattering that must be subtracted from a measured scatterin… more

Date: September 1, 1980

Creator: Schmidt, P.W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Characterization of Oil and Gas Reservoir Heterogeneity

The ultimate objective of this cooperative research project is to characterize Alaskan petroleum reservoirs in terms of their reserves, physical and chemical properties, geologic configuration in relation to lithofacies and structure, and development potential. The project has two tasks: Task 1 is a geological description of the reservoirs including petrophysical properties, i.e., porosity, permeability, permeability variation, formation depth, temperature, and net pay, facies changes and reser… more

Date: January 1, 1992

Creator: Sharma, G. D.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Basic data report for drillhole WIPP 19 (Waste Isolation Pilot Plant-WIPP)

WIPP 19 is an exploratory borehole whose objective was to determine the nature of the near-surface formations after seismic information indicated a possible fault. The borehole is located in section 20, T.22S., R.31E., in eastern Eddy County, New Mexico, and was drilled between April 6 and May 4, 1978. The hole was drilled to a depth of 1038.2 feet and encountered, from top to bottom, surficial Holocene deposits (7', including artificial fill for drill pad), the Mescalero caliche (7'), the Sant… more

Date: March 1, 1980

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Characterization of facies and permeability patterns in carbonate reservoirs based on outcrop analogs

The primary objective of this research is to develop methods for better describing the three-dimensional geometry of carbonate reservoir flow units as related to conventional or enhanced recovery of oil. Detailed characterization of geologic facies and rock permeability in reservoir-scale outcrops of the Permian San Andres Formation in the Guadalupe Mountains of New Mexico will provide the key data base. To this end detailed sampling on grids using a portable core-plugging device was undertaken… more

Date: January 1, 1991

Creator: Kerans, C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Characteristics of chars produced by pyrolysis following rapid heating of pulverized coal. [104 references]

A 5.08-cm id pyrolysis furnace has been used to study pyrolysis following rapid heating of size graded pulverized coal particles as a function of isothermal pyrolysis time (0.018 to 1.025 second), particle size (50 to 181 ..mu..m), and parent coal (three lignites). The following experimental conditions were kept constant: Coal feed rate approximately equal to 0.5 g/min; volumetric flow rate of nitrogen temperature = 808/sup 0/C, and pressure = atmospheric. Under these conditions the heating rat… more

Date: February 1, 1977

Creator: Nsakala, N.; Walker, Jr., P. L. & Essenhigh, R. H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Fission gas bubble nucleated cavitational swelling of the alpha-uranium phase of irradiated U-Pu-Zr fuel

Cavitational swelling has been identified as a potential swelling mechanism for the alpha uranium phase of irradiated U-Pu-Zr metal fuels for the Integral Fast Reactor being developed at Argonne National Laboratory. The trends of U-Pu-Zr swelling data prior to fuel cladding contact can be interpreted in terms of unrestrained cavitational driven swelling. It is theorized that the swelling mechanisms at work in the alpha uranium phase can be modeled by single vacancy and single interstitial kinet… more

Date: April 1, 1992

Creator: Rest, J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Rock Matrix and Fracture Analysis of Flow in Western Tight Gas Sands

Advanced core analysis includes measurements on the matrix properties of the rock. Matrix properties are important even in fractured wells since it is these properties which determine the rate of gas flow into the fractures. Cores are being tested from the fluvial, coastal, and paludal zones of the Mesaverde. At least two cores from each of these zones from all three wells will be analyzed. Properties measured include permeability as a function of confining pressure over the range of 500 to 500… more

Date: January 1, 1985

Creator: Morrow, N. R.; Brower, K. R. & Ward, J. S.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Backfill barrier as a component in a multiple barrier nuclear waste isolation system

Quantitative estimates of the potential effectiveness of backfill barriers based on a linear sorption model are presented. Using getters such as clays (known sorbents), a backfill approximately 1-foot-thick can delay by 10/sup 4/ to 10/sup 5/ years the breakthrough of transuranics. A delay of 10/sup 3/ years is possible for major cationic fission products. These delays can be achieved provided that (1) the distribution coefficient (K/sub d/, a measure of affinity for sorbed species) for the bar… more

Date: May 1, 1980

Creator: Nowak, E.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Detailed report on tested models companion report 2 to simulation of geothermal subsidence (LBL 10571)

An assessment was performed of existing mathematical models for subsidence simulation and prediction. Detailed analyses are presented of the theory, power, usability, and performance of the seven models used in conjunction with an ongoing research program aimed at improved understanding and control of ground movements caused by geothermal power production. The models used were: hand-calculation techniques; the nucleus-of-strain method; the one-dimensional Terzaghi consolidation method; the two-… more

Date: March 1, 1980

Creator: Miller, I.; Dershowitz, W.; Jones, K.; Myer, L.; Roman, K. & Schauer, M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Hydrogeologic effects of natural disruptive events on nuclear waste repositories

Some possible hydrogeologic effects of disruptive events that may affect repositories for nuclear wastte are described. A very large number of combinations of natural events can be imagined, but only those events which are judged to be most probable are covered. Waste-induced effects are not considered. The disruptive events discussed above are placed into four geologic settings. Although the geology is not specific to given repository sites that have been considered by other agencies, the geol… more

Date: June 1, 1980

Creator: Davis, S.N.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Cross-borehole and surface-to-borehole electromagnetic induction for reservoir characterization

Audio-frequency cross-borehole and surface-to-borehole electromagnetics (EM) are interesting alternatives to existing techniques for petroleum reservoir characterization and monitoring. With these methods signals may be propagated several hundreds of meters through typical sand/shale reservoirs and data may be collected at high accuracy with a high sensitivity to the subsurface resistivity distribution. Field systems for cross-borehole and surface-to-borehole EM measurements have been designed … more

Date: August 1, 1991

Creator: Wilt, M. J.; Morrison, H. F.; Becker, A. & Lee, K. H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Hydrological and geochemical investigations of selenium behavior at Kesterson Reservoir

From 1985 to the present we have studied the behavior of selenium in various habitats and environments at Kesterson reservoir, shifting emphasis as remedial actions altered the physical setting. Investigations have evaluated the efficacy of several remedial alternatives, from innovative techniques relying on the complex geochemical behavior of selenium alternatives, from innovative techniques relying on the complex geochemical behavior of selenium in aquatic environments to conventional excavat… more

Date: October 1, 1990

Creator: Benson, S. M.; Tokunaga, T. K.; Zawislanski, P.; Yee, A. W.; Daggett, J. S.; Oldfather, J. M. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Wilcox sandstone reservoirs in the deep subsurface along the Texas Gulf Coast - their potential for production of geopressured geothermal energy. Final report

The following subjects are included: regional setting, stratigraphic sections, Lower Wilcox sandstone distribution, formation pressure, formation temperature used to delineate geothermal fairways, Zapata Fairway, Duval Fairway, Live Oak Fairway, De Witt Fairway, Colorado Fairway, and Harris Fairway. Depositional and structural style, formation pressures and temperatures, porosity and permeability, formation water salinity, and Cuero Prospect are covered for De Witt Fairway. Depositional and str… more

Date: October 1, 1979

Creator: Debout, D. G.; Weise, B. R.; Gregory, A. R. & Edwards, M. B.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Mechanisms affecting mass transfer in fuel cells

An initial analysis of particulate effects on molten carbonate fuel cells has been conducted. The analysis has been applied to a conceptual fuel cell with operating parameters appropriate to use with future power generation plants. Particle transport due to several mechanisms has been considered and dominant mechanisms affecting particle delivery to anode channel surfaces and into anode pores have been identified. Thermophoresis and gas flow out from anode pores have been found to inhibit parti… more

Date: March 15, 1982

Creator: Wenglarz, R.A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Effects of capillary heterogeneity on vapor-liquid counterflow in porous media

Based on a continuum description, the effect of capillary heterogeneity, induced by variation in permeability, on the steady state, countercurrent, vapor-liquid flow in porous media is analyzed. It is shown that the heterogeneity acts as a body force, that may enhance or diminish gravity effects on heat pipes. Selection rules that determine the steady states reached in homogeneous, gravity-driven heat pipes are also formulated. It is shown that the infinite'' two-phase zone may terminate by a s… more

Date: June 1, 1992

Creator: Stubos, A.K.; Satik, C. & Yortsos, Y.C.

Item Type: Report

Partner: UNT Libraries Government Documents Department