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captions transcript

[News Clip: Explosion]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: June 26, 1995, 5:00 p.m.
Duration: 58 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: Explosion]

Description: B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: June 26, 1995, 5:00 p.m.
Duration: 44 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
open access

D0 Silicon Upgrade: Cryolab Control Valve Modification Information for D0-EVMF-H

Description: This engineering note documents some information regarding the solenoid magnet flow valve, EVMF. See also EN-437 'Control Dewar valve sizing' also for further information on this valve. This note documents the modification done to the valve to change it to a Cv = 0.32.
Date: October 26, 1995
Creator: Rucincki, Russ
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

D0 Silicon Upgrade: Upgrade on Cryogenic Lines at Refrigerator

Description: This is an upgrade to the thermal contraction analysis sound in D0 Engineering Note: 3823.115-EN-426. In this new design, a portion of the transfer lines are consolidated into one 6-inch vacuum jacket. Since all four transfer lines follow the same path and are of equal lengths, the stress analysis is performed on only one transfer line using the design system ALGOR{reg_sign}. The GHe Cooldown Supply line is analyzed for combined pressure, thermal movement, and dead weight and all the stresses w… more
Date: September 26, 1995
Creator: Kuwazaki, Andrew
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Interpretation of pre- and post-fracturing well tests in a geothermal reservoir

Description: Pre- and post-fracturing well tests in TG-2 well drilled next to the Matsukawa field are interpreted for evaluating effects of a massive hydraulic fracturing treatment. The interpreted data include multiple-step rate tests, a two-step rate test, and falloff tests. Pressure behaviors of massive hydraulic fracturing are matched by a simulator of dynamic fracture option. Fracture parting pressures can be evaluated from the multiple-step rate test data. The multiple-step rates during the massive hy… more
Date: January 26, 1995
Creator: Arihara, Norio; Fukagawa, Hiroshi; Hyodo, Masami & Abbaszadeh, Maghsood
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Are there significant hydrothermal resources in the US part of the Cascade Range?

Description: The Cascade Range is a geothermal dichotomy. On the one hand, it is an active volcanic arc above a subducting plate and is demonstrably an area of high heat flow. On the other hand, the distribution of hydrothermal manifestations compared to other volcanic arcs is sparse, and the hydrothermal outflow calculated from stream chemistry is low. Several large estimates of undiscovered geothermal resources in the U.S. part of the Cascade Range prepared in the 1970s and early 1980s were based fundamen… more
Date: January 26, 1995
Creator: Muffler, L.J. Patrick & Guffanti, Marianne
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Thermodynamic transient behavior of a geothermal fracture

Description: This paper presents a space integrated zero dimensional model that describes the thermodynamic behavior of a geothermal fracture undergoing exploitation. The main assumptions involved are: fluid and energy entering the fracture come from the surrounding matrix, fracture of infinite conductivity, and that the steam and water phases are gravitationally segregated and in thermodynamic equilibrium. The nonlinear equations of mass and energy conservation are numerically solved. A sensitivity analysi… more
Date: January 26, 1995
Creator: Ascencio, F.; Samaniego, F.; Cinco-Ley, H. & Rivera, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Characterization of injection wells in a fractured reservoir using PTS logs, Steamboat Hills Geothermal Field, Nevada, USA

Description: The Steamboat Hills Geothermal Field in northwestern Nevada, about 15 km south of Reno, is a shallow (150m to 825m) moderate temperature (155 C to 168 C) liquid-dominated geothermal reservoir situated in highly-fractured granodiorite. Three injection wells were drilled and completed in granodiorite to dispose of spent geothermal fluids from the Steamboat II and III power plants (a 30 MW air-cooled binary-type facility). Injection wells were targeted to depths below 300m to inject spent fluids b… more
Date: January 26, 1995
Creator: Goranson, Colin & Combs, Jim
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Effect of sorption/curved interface thermodynamics on pressure transient

Description: A simulation model capable of handling the effects of sorption was constructed. It accounts for the curved interface thermodynamics associated with adsorption and desorption. Data from several laboratory experiments were used to verify the model. The results indicated that simulation runs using sorption isotherms adequately model the pressure transient behavior observed in the laboratory experiments. Dry steam models severely underestimated the effective compressibility. Models using flat-inter… more
Date: January 26, 1995
Creator: Lim, K.T. & Aziz, K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

X-ray tomography of preserved samples from The Geysers scientific corehole

Description: Approximately 800 ft. of continuous core was recovered from borehole SB-15 D (on unit 15, near the site of the abandoned Geysers Resort) during a recently completed drilling operation funded by the USDOE. Sections of this core were collected at 50 ft intervals for subsequent examination as drilling proceeded. Five foot sections were not removed at the drill site, but were sealed in the innermost sleeve of a triple tube coring system to minimize drying and disturbance of the core. All cores rema… more
Date: January 26, 1995
Creator: Bonner, B. P.; Roberts, J. J.; Schneberk, D. J.; Marsh, A.; Ruddle, C. & Updike, E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Hydrothermal factors in porosity evolution and caprock formation at the Geysers steam field, California--insight from the Geysers Coring Project

Description: The Department of Energy (DOE)/geothermal industry-sponsored Geysers Coring Project (GCP) has yielded 236.8 m of continuous core apparently spanning the transition between the uppermost Geysers steam reservoir and its caprock. Both zones in the corehole are developed in superficially similar, fractured, complexly veined and locally sericitized, Franciscan (late Mesozoic) graywacke-argillite sequences. However, whereas the reservoir rocks host two major fluid conduits (potential steam entries), … more
Date: January 26, 1995
Creator: Hulen, Jeffrey B. & Nielson, Dennis L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Using a Hot Dry Rock geothermal reservoir for load following

Description: Field measurements and modeling have shown the potential for using a Hot Dry Rock (HDR) geothermal reservoir for electric load following: either with Power-Peaking from a base-load operating condition, or for Pumped Storage of off-peak electric energy with a very significant thermal augmentation of the stored mechanical energy during periods of power production. For the base-load with power-peaking mode of operation, an HDR reservoir appears capable of producing over twice its nominal power out… more
Date: January 26, 1995
Creator: Brown, Donald & Du Teau, Robert
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Chemical water/rock interaction under reservoir condition

Description: A simple model is proposed for water/rock interaction in rock fractures through which geothermal water flows. Water/rock interaction experiments were carried out at high temperature and pressure (200-350 C, 18 MPa) in order to obtain basic solubility and reaction rate data. Based on the experimental data, changes of idealized fracture apertures with time are calculated numerically. The results of the calculations show that the precipitation from water can lead to plugging of the fractures under… more
Date: January 26, 1995
Creator: Watanabe, K.; Tanifuji, K.; Takahashi, H.; Wang, Y.; Yamasaki, N. & Nakatsuka, K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Modeling discharge requirements for deep geothermal wells at the Cerro Prieto geothermal field, MX

Description: During the mid-l980's, Comision Federal de Electricidad (CFE) drilled a number of deep wells (M-200 series) at the Cerro Prieto geothermal field, Baja California, Mexico to investigate the continuation of the geothermal reservoir to the east of the Cerro Prieto-II and III production areas. The wells encountered permeability at depths ranging from 2,800 to 4,400 m but due to the reservoir depth and the relatively cold temperatures encountered in the upper 1,000 to 2,000 m of the wells, it was no… more
Date: January 26, 1995
Creator: Menzies, Anthony J.; Granados, Eduardo E.; Puente, Hector Gutierrez & Pierres, Luis Ortega
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Locating an Active Fault Zone in Coso Geothermal Field by Analyzing Seismic Guided Waves From Microearthquake Data

Description: Active fault systems usually provide high-permeability channels for hydrothermal outflow in geothermal fields. Locating such fault systems is of a vital importance to plan geothermal production and injection drilling, since an active fault zone often acts as a fracture-extensive low-velocity wave guide to seismic waves. We have located an active fault zone in the Coso geothermal field, California, by identifying and analyzing a fault-zone trapped Rayleigh-type guided wave from microearthquake d… more
Date: January 26, 1995
Creator: Lou, M.; Malin, P. E. & Rial, J. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Microearthquake monitoring at the Southeast Geysers using a high-resolution digital array

Description: Microearthquake activity at the Southeast Geysers, California, geothermal field is monitored with a high-resolution digital seismic network. Hypocenters are spatially clustered in both injection and production areas, but also occur in more diffuse patterns, mostly at depths from 1 to 2.8 km. Hypocenters near the injection well DV-11 exhibit a striking correlation with movement of injectate and injectate-derived steam. Preliminary moment tensor results show promise to provide information on the … more
Date: January 26, 1995
Creator: Kirkpatrick, Ann; Peterson, John E., Jr. & Majer, Ernie L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Study of desorption in a vapor dominated reservoir with fractal geometry

Description: This paper is an attempt to model well decline in a vapor dominated reservoir with fractal geometry. The fractal network of fractures is treated as a continuum with characteristic anomalous diffusion of pressure. A numerical solver is used to obtain the solution of the partial differential equation including adsorption in the fractal storage space. The decline of the reservoir is found to obey the empirical hyperbolic type relation when adsorption is not present. Desorption does not change the … more
Date: January 26, 1995
Creator: Tudor, Monica; Horne, Roland N. & Hewett, Thomas A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Thermal extraction analysis of five Los Azufres production wells

Description: Thermal energy extraction from five wells supplying 5-MWe wellhead generators in three zones of the Los Azufres geothermal field has been examined from production and chemical data compiled over 14-years of operation. The data, as annual means, are useful in observing small-scale changes in reservoir performance with continuous production. The chemical components are chloride for quality control and the geothermometer elements for reservoir temperatures. The flowrate and fluid enthalpy data are… more
Date: January 26, 1995
Creator: Kruger, Paul & Quijano, Luis
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Instabilities during liquid migration into superheated hydrothermal systems

Description: Hydrothermal systems typically consist of hot permeable rock which contains either liquid or liquid and saturated steam within the voids. These systems vent fluids at the surface through hot springs, fumaroles, mud pools, steaming ground and geysers. They are simultaneously recharged as meteoric water percolates through the surrounding rock or through the active injection of water at various geothermal reservoirs. In a number of geothermal reservoirs from which significant amounts of hot fluid … more
Date: January 26, 1995
Creator: Fitzgerald, Shaun D. & Woods, Andrew W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

HDR reservoir analysis incorporating acoustic emission data

Description: A set of models of HDR systems is presented which attempts to explain the formation and operation of HDR systems using only the in-situ properties of the fractured rock mass, the earth stress field, the engineering intervention applied by way of stimulation and the relative positions and pressures of the well(s). A statistical and rock mechanics description of fractures in low permeability rocks provides the basis for modeling of stimulation, circulation and water loss in HDR systems. The model… more
Date: January 26, 1995
Creator: Willis-Richards, J.; Watanable, K.; Yamaguchi, T. & Takasugi, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Public Information Projects of the Geothermal Resources Council and the Geothermal Energy Association

Description: During the past 20 years the Geothermal Resources Council (GRC), has grown and changed dramatically. An educational organization, the GRC sponsors an annual scientific meeting, and short courses, workshops, and symposia. Meetings and workshops typically are held at locations where members can also attend field trips. The GRC also publishes special reports, a monthly magazine, the GRC BULLETIN, and annual meeting transactions. The GRC On-line Information System, a relatively new service, is a li… more
Date: January 26, 1995
Creator: Anderson, David N. & Smith, Estela
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Numerical modeling of boiling due to production in a fractured reservoir and its field application

Description: Numerical simulations were carried out to characterize the behaviors of fractured reservoirs under production which causes in-situ boiling. A radial flow model with a single production well, and a two-dimensional geothermal reservoir model with several production and injection wells were used to study the two-phase reservoir behavior. The behavior can be characterized mainly by the parameters such as the fracture spacing and matrix permeability. However, heterogeneous distribution of the steam … more
Date: January 26, 1995
Creator: Yano, Yusaku & Ishido, Tsuneo
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Application of magnetic method to assess the extent of high temperature geothermal reservoirs

Description: The extent of thermally altered rocks in high temperature geothermal reservoirs hosted by young volcanic rocks can be assessed from magnetic surveys. Magnetic anomalies associated with many geothermal field in New Zealand and Indonesia can be interpreted in terms of thick (up to 1 km) demagnetized reservoir rocks. Demagnetization of these rocks has been confirmed by core studies and is caused by hydrothermal alteration produced from fluid/rock interactions. Models of the demagnetized Wairakei (… more
Date: January 26, 1995
Creator: Soengkono, S. & Hochstein, M.P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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