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captions transcript

[News Clip: Property Owners]

Description: B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. This story aired at 10 pm.
Date: January 20, 1987
Duration: 48 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: Nursing shortage]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. This story aired at 6pm.
Date: January 20, 1987
Duration: 1 minute 42 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: Demo. Leadership]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. This story aired at 10pm.
Date: January 20, 1987, 10:00 p.m.
Duration: 2 minutes 07 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: Mayor Filing]

Description: B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. This story aired at 6 pm.
Date: January 20, 1987
Duration: 48 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: Property Owners]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. This story aired at 6 pm.
Date: January 20, 1987
Duration: 1 minute 31 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
open access

Two Phase Streaming Potentials

Description: The streaming potentials generated by the flow of both liquid and gas through either a Pyrex capillary tube or else an unconsolidated Pyrex porous medium were investigated. This mixture of distilled water plus nitrogen gas simulated wet stream but allowed experiments to be run at room temperature. Single-phase flow of distilled water alone resulted in a constant voltage-to-pressure drop ratio, E/∆p, of +0.15 v/psi for the capillary tube and -0.52 v/psi for the porous medium. For both single- an… more
Date: January 20, 1987
Creator: Marsden, S.S. & Wheatall, M.W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Heat Sweep Analysis of Thermal Breakthrough at Los Humeros and La Primavera Fields, Mexico

Description: Early evaluation of the potential for geothermal breakthrough of reinjected fluids in newly developed geothermal fields can be obtained with the SGP one-dimensional heat sweep model. The model was used to estimate fluid cooldown from wells selected for the first wellhead generating units to be installed at the Los Humeros and La Primavera geothermal fields in Mexico, based on staff-compiled geometric and geologic data, thermal properties of the reservoir rock, and expected production conditions… more
Date: January 20, 1987
Creator: Kruger, P.; Lam, S.; Molinar, R. & Aragon, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Discharging Through an Orifice Determines Steam-Water Enthalpy

Description: Abstract: A wide range of steam-water mixtures was discharged to the atmosphere through a 10.7 mm diameter orifice which was sharp-edged with a minuscule throat pressure tapping. The ratio of throat pressure to up-stream pressure was found sensitive to dryness fraction over the whole range studied from 0.03 to 1.0. The technique (employing large orifices) has the potential of identifying the unknown enthalpy of geothermal wells discharging large flows. Contrariwise, a nozzle (rounded entry orif… more
Date: January 20, 1987
Creator: James, Russell
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Multiphase, Multicomponent Compressibility in Geothermal Reservoir Engineering

Description: Coefficients of compressibilities below the bubble point were computer with a thermodynamic model for single and multicomponent systems. Results showed coefficients of compressibility below the bubble point larger than the gas coefficient of compressibility at the same conditions. Two-phase compressibilities computed in the conventional way are underestimated and may lead to errors in reserve estimation and well test analysis. 10 refs., 9 figs.
Date: January 20, 1987
Creator: Macias-Chapa, L. & Ramey, H. J., Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Pressure Buildup Testing of Well 18 in Los Azufres Field, Mexico

Description: Well 18 is a production well in the southern zone of Los Azufres geothermal field in México (see Figure 1). The well is located on the eastern flank of the drilled area, and produces a steam/water mixture from a depth of 1200-1250 m. A 19 hour pressure buildup test that was carried out in March 1986, is the subject of this paper. It is part of work reported by Sánchez-U. (1986) at the Geothermal Training Programme in Iceland. The permeability-thickness product of well 18 in Los Azufres field wa… more
Date: January 20, 1987
Creator: Upton, Pedro Sanchez & Gudmundsson, Jon-Steinar
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A Practical Approach to Producing Vapor-Dominated Reservoirs

Description: This paper presents arguments for initially producing Geysers steam wells at wellhead pressures in excess of 200 psig instead of the normal practice of producing at minimum wellhead pressures. A conceptual model is presented which defines a flow equilibrium resulting from a “constant pressure source” whose location is a function of the withdrawal rate from the reservoir. Based on this model, it is argued that producing at elevated wellhead pressures is equal to producing at minimum wellhead pre… more
Date: January 20, 1987
Creator: Kumataka, Mark K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Radial Dispersion in a Double-Porosity System with Fracture Skin

Description: The problem of dispersion, advection and adsorption of a tracer in a double-porosity reservoir due to tracer injection in a well with a steady, radially divergent flow field was solved for the case of constant tracer concentration in the injection well. Longitudinal dispersion and advection was assumed to dominate transport in the fracture system and tracer diffusion and adsorption was assumed to dominate movement of the tracer in the matrix blocks. The blocks were assumed to be sphere shaped a… more
Date: January 20, 1987
Creator: Moench, Allen F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Geothermal Energy - An Emerging Resource

Description: Address on the Department of Energy's overall energy policy, the role of alternative energy sources within the policy framework, and expectations for geothermal energy. Commendation of the industry's decision to pursue the longer-term field effort while demand for geothermal energy is low, and thus prepare for a substantial geothermal contribution to the nation's energy security.
Date: January 20, 1987
Creator: Berg, John R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Parallel Fractures Model for Tracer Flow Through Geothermal Reservoirs - Preliminary Results

Description: A parallel fractures model, having equal width and spacing, has been developed to study the flow of tracers through naturally fractured geothermal reservoirs. The model is capable of handling either a single fracture or a system of two or more parallel fractures, interacting with associated porous bodies. The reservoir is treated as being composed of two regions a mobile region where diffusion and convection are allowed and a stagnant or immobile region where only diffusion and adsorption are a… more
Date: January 20, 1987
Creator: Rivera, J. R.; Ramirez, J. S. & Rodriguez, F. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Linear Water Influx of an Infinite Aquifer Through a Partially Communicating Fault

Description: This paper presents a linear flow water influx analysis method where the aquifer is separated from the reservoir by a partially communicating fault. Transient pressure distributions are considered both in the reservoir and in the aquifer. Cases where the leaky fault is located within the aquifer can be analyzed with this model given a superposition of constant rate flow periods at the oil-water interface. Constant production rate is specified at the inner boundary, without inner boundary storag… more
Date: January 20, 1987
Creator: Ambastha, Anil K. & Sageev, Abraham
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Development and Exploitation of Low Enthalpy Geothermal Systems, Example of "The Dogger" in the Paris Basin, France

Description: A feature of French geothermal engineering is the development of industrial projects in normal gradient, non-convective areas. The economic feasibility of exploiting wells producing between 150 and 350 m{sup 3}/h at temperatures from 55° to 85° from depths of 1,500 to 2,000 meters, in sedimentary basins with normal gradient, for direct heat production has been proved by 50 plants providing heating for over 500,000 people during the last few years. This opens new possibilities for geothermal ene… more
Date: January 20, 1987
Creator: Rojas, J.; Menjoz, A.; Martin, J. C.; Criaud, A. & Fouillac, C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Interference Tests at Kawerau, New Zealand

Description: Analysis of interference tests at the Kawerau geothermal field in New Zealand has indicated that the reservoir may be viewed on a coarse scale as a two-layer structure. While these layers have high permeabilities, they are in poor hydrological communication with each other. The shallower layer is modelled as a finite cylindrical reservoir. The deeper layer is modelled as a larger cylindrical reservoir with recharge from the sides. The fitted permeabilities and storativities suggest the importan… more
Date: January 20, 1987
Creator: Burnell, John G. & McGuinness, Mark J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A New Derivative Type-Curve for Pressure Buildup Analysis with Boundary Effects

Description: This study investigates pressure buildup behavior of wells with wellbore storage and skin in bounded circular reservoirs, when inner and outer boundary effects interact to fully or partially dominate the well pressure response. Using dimensionless pressure derivative as the dependent variable, we show that early time response is governed by C{sub D}e{sup 2S} and late time response by r{sub eD}{sup 2}/C{sub D}. Equations are provided to estimate the limits of the intermediate time period, which … more
Date: January 20, 1987
Creator: Mishra, S. & Ramey, H.J. Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Pressure Depletion Calculations for Liquid Geothermal Reservoirs

Description: One of the key problems in geothermal field management is to determine how many wells will be needed, and when in the project lifetime the new wells will come on-line. To make this determination requires an estimate of the field depletion. Methods used for approximating the field behavior are discussed, and examples are provided using data from some liquid-dominated reservoirs in the U.S. and abroad. The calculated decline curves are compared to a few cases for which field production data is av… more
Date: January 20, 1987
Creator: Schroeder, R. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Response of the Los Azufres Geothermal Field to Four Years of 25 MW Wellhead Generation

Description: Production and chemical data have been compiled and analyzed on a six-month averaged basis for the first four years of electric energy generation with five 5-MW wellhead generators at the Los Azufres geothermal field. The data were evaluated with respect to the extent of observable thermal drawdown of the reservoir from 25 MW of generation in relation to the estimated capacity of the field of several hundred megawatts of power. The analysis updates the previous one compiled after the first two … more
Date: January 20, 1987
Creator: Kruger, P.; Ortiz, J.; Miranda, G. & Gallardo, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Geochemistry and the Exploration of the Ngawha Geothermal System, New Zealand

Description: The Ngawha geothermal system is atypical of New Zealand geothermal systems, being located outside the Taupo Volcanic Zone, and contained in tight sedimentary structures. Early geochemical surveys of surface discharges indicated a high gas, high borate fluid, discharging in small quantities, to the surface. An initial well (drilled in the early 1960’s, to 500m) produced a vary gassy fluid before calciting. Deeper wells drilled and discharged in the early 1980’s produced large flows of high gas f… more
Date: January 20, 1987
Creator: Sheppard, D.S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

On Fluid and Heat Transfer in Deep Zones of Vapor-Dominated Geothermal Reservoirs

Description: We have presented a preliminary analysis of permeability structure and fluid and heat flow conditions in the deeper horizons of the Larderello geothermal system. Our main observations and findings are: (1) Measurements in deep Larderello wells have indicated formation temperatures near 300 º C at 3000 m depth, and even higher temperatures at greater depth. (2) From an analysis of heat transfer mechanisms we suggest that a transition from vapor-dominated to liquid-dominated conditions must have … more
Date: January 20, 1987
Creator: Pruess, K.; Celati, R.; Calore, C. & Cappetti, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Bleeding Characteristics of Geothermal Wells

Description: Abstract: Discharging small flows (order of 1 t/h) from wells is known as bleeding and is to relieve the build-up of gas pressure at the wellhead and to arrest corrosion in the bore. First tests over a range of bleeding flows indicate it as a fruitful subject for study in that temperature and pressure measurements at the wellhead can indicate the well enthalpy and the non-condensible gas content of the production system. Because of environmental restrictions on testing with large discharges in … more
Date: January 20, 1987
Creator: James, Russell & Gould, Tom
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Fracture Detection in Geothermal Wells Drilled in Volcanic Rocks

Description: The Phlegrean Fields, close to Naples, are the site of important geothermal activity. The formations are volcanic and mostly tuffites. They are originally very tight but the geothermal alteration locally produces fractures with large increase in permeability. The lack of geological markers makes well-to-well correlation quite difficult. Thus the local detection of fractured zones in each well is very important for the evaluation of its potential. The Mofete 8 D well is a typical example. A rath… more
Date: January 20, 1987
Creator: Gonfalini, Mauro; Chelini, Walter; Cheruvier, Etienne; Suau, Jean & Klopf, Werner
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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