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66
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35
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25
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2
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2
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1
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1
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65
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45
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28
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25
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21
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15
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3
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2
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Attempt to compare two arc orbit correction schemes analytically
Consider a transport line that consists of periodic cells. Let the beam position monitors and the orbit correctors be located with the same period as the cells and let the BPM's and the corrector distributions interlace each other. The arrangement does not always provide a stable orbit correction. The criterion for stability has been derived by Joe Murray and is reproduced. We calculate the rms orbit, the effect of BPM errors and the rms corrector strength in such correction schemes, yielding analytic formulae for these quantities. We then apply these formulae to the SLC arcs.
Date:
December 15, 1983
Creator:
Chao, A. & Weng, W.
Object Type:
Report
System:
The UNT Digital Library
[Photograph 2012.201.B0139.0261]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Gene Cole, an Oklahoma City Target store manager, admires a painting at the Oklahoma Art Center with students Vincent Colbert, Tom Hoover and John Taitano, from left."
Date:
December 15, 1983
Creator:
Gooch, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Temperatures and interval geothermal-gradient determinations from wells in National Petroleum Reserve in Alaska
Temperature and related records from 28 wells in the National Petroleum Reserve in Alaska (NPRA) although somewhat constrained from accuracy by data gathering methods, extrapolate to undisturbed formation temperatures at specific depths below permafrost, and lead to calculated geothermal graidents between these depths. Tabulation of the results show that extrapolated undisturbed temperatures range from a minimum of 98/sup 0/F (37/sup 0/C) at 4000 feet (1220 m) to a maximum of 420/sup 0/F (216/sup 0/C) at 20,260 feet (6177 m) and that geothermal gradients range from 0.34/sup 0/F/100' (6/sup 0/C/km) between 4470 feet to 7975 feet (Lisburne No. 1) and 3.15/sup 0/F/100' (57/sup 0/C/km) between 6830 feet to 7940 feet (Drew Point No. 1). Essential information needed for extrapolations consists of: time-sequential bottom-hole temperatures during wire-line logging of intermediate and deep intervals of the borehole; the times that circulating drilling fluids had disturbed the formations; and the subsequent times that non-circulating drilling fluids had been in contact with the formation. In several wells presumed near direct measures of rock temperatures recorded from formation fluids recovered by drill stem tests (DST) across thin (approx. 10-20 foot) intervals are made available. We believe that the results approach actual values close enough to serve …
Date:
December 15, 1983
Creator:
Blanchard, D.C. & Tailleur, I.L.
Object Type:
Report
System:
The UNT Digital Library
[Photograph 2012.201.B0348.0404]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Bettie Kwilos"
Date:
December 15, 1983
Creator:
Miller, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0261B.0582]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Dewey Holmes buys only the best birdseed for is pampered menagerie."
Date:
December 15, 1983
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0149.0007]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Walter Cronkite, former news anchorman"
Date:
December 15, 1983
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0259.0053]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "John Hefner, right, compliments Johnson and Millie Hightower on the decorations in their house at the Christmas party for the Associate Board."
Date:
December 15, 1983
Creator:
Southerland, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0262B.0388]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Racing Commission members, from left, Dan Fick, Delores Mitchell, Paul Carris, Allen Coles and Tommy Ray Young consider an application for pari-mutuel racing near Sallisaw."
Date:
December 15, 1983
Creator:
Southerland, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0264.0333]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
December 15, 1983
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0076.0145]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "sail are Br. Lyle Burroughs, Ben Blackstock and Mrs. George W. Bass at right."
Date:
December 15, 1983
Creator:
Wilson, George R.
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0310B.0273]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "In top photo, members of Encore, John Marshall High School's choral group, sing a rollicking Christmas tune during their annual holiday concert."
Date:
December 15, 1983
Creator:
Southerland, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
The Cherokeean. (Rusk, Tex.), Vol. 134, No. 44, Ed. 1 Thursday, December 15, 1983
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
December 15, 1983
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
[Photograph 2012.201.B0967.0553]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Vector Specialized Construction build its portable or modular banking facilities in its 10,000 square-foot plant at 7205 N Robinson."
Date:
December 15, 1983
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
The Albany News (Albany, Tex.), Vol. 108, No. 26, Ed. 1 Thursday, December 15, 1983
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
December 15, 1983
Creator:
Lucas, Donnie A.
Object Type:
Newspaper
System:
The Portal to Texas History
San Antonio Register (San Antonio, Tex.), Vol. 48, No. 37, Ed. 1 Thursday, December 15, 1983
Weekly newspaper from San Antonio, Texas that includes local, state, and national news along with advertising.
Date:
December 15, 1983
Creator:
Glosson, Edwin
Object Type:
Newspaper
System:
The Portal to Texas History
Laboratory Physical Model for Pattern Injection in Geothermal Systems
In the development of geothermal sources for power generation, production of geothermal fluids as well as reinjection becomes an important aspect for significant heat extraction from the reservoir rock. The purpose of this work was to understand how cold water injection in five spot pattern affected the temperature distributions and production pressures in a physical model with a constant temperature heat source. The production and injection rates were varied as well as their respective depths. The model is a hot water dominated system with crushed limestone of 0.6-0.9 cm particle size as the reservoir rock, which had 40% porosity, 58 darcy permeability. The analysis revealed that injection rate should be at least 2/3 of production rate (measured as condensed water) so that the pressure decline at the producing end was stopped. Heat extraction from the system was high when injection was done towards the top of the model while production horizon was deeper.
Date:
December 15, 1983
Creator:
Parlaktuna, M. & Okandan, E.
Object Type:
Article
System:
The UNT Digital Library
One Component Two Phase Flow in Horizontal and Vertical Ducts: Some Basic Considerations
For a description and analysis of the flow they consider the conservation equations of the two phases separately, but in thermal and mechanical equilibrium, coupled by the itnerface shear forces (two fluid model, drift flux model). Coupling may be weak or strong, depending on Froude and Mach numbers of the flow. The fluid is highly compressible, not because the individual phases move at such speeds that their individual density changes are significant but because evapiration (phase change) results in large density changes of the system at moderate pressure or temperature changes once flashing occurs. The slip between the phases is caused by unequal wall shear stress, acceleration of the fluid or gravitational forces and is hindered by the interface interaction. if they denote by {gamma} the ratio of the liquid density to the vapor density and by {sigma} the ratio of the vapor speed to the liquid speed they find that in horizontal flows {sigma} = {gamma}{sup 1/2} yields the maximum slip (neglecting acceleration effects) that can be reached with no interface force acting (assuming equal friction coefficients for both phases at the wall). If one investigates the conditions of thermodynamic flow similarity between different substances in two phase flow, …
Date:
December 15, 1983
Creator:
Maeder, Paul F.; Dickinson, David A. & Nikitopoulos, Dimitris E.
Object Type:
Article
System:
The UNT Digital Library
Design and Development of a Test Facility to Study Two-Phase Steam/Water Flow in Porous Media
The concept of relative permeability is the key concept in extending Darcy's law for single phase flow through porous media to the two-phase flow regime. Relative permeability functions are needed for simulation studies of two-phase geothermal reservoirs. These are poorly known inspite of considerable theoretical and experimental investigations during the last decade. Since no conclusive results exist, many investigators use ad hoc parametrization, or adopt results obtined from flow of oil and gas (Corey, 1954). It has been shown by Reda and Eaton (1980) that this can lead to serious deficiencies. Sensitivity of the relative permeability curves for prediction of mass flow rate and flowing enthalpy into geothermal wells has been studied by many investigators (e.g. Eaton and Reda (1980), Bodvarsson et al (1980), Sun and Ershagi (1979) etc.). It can be concluded from these studies that the beehavior of a two-phase steam/water reservoir depends greatly on the relative permeability curves used. Hence, there exists a need for obtaining reliable relative permeability functions.
Date:
December 15, 1983
Creator:
Verma, Ashok K.; Pruess, Karsten; Bodvarsson, G. S.; Tsang, C. F. & Witherspoon, Paul A.
Object Type:
Article
System:
The UNT Digital Library
Interpretation of Interference Data from the Klamath Falls, Oregon Geothermal Resource
Data from a seven week pressure interference test in the Klamath Falls, Oregon geothermal resource have been analyzed. The data indicate that productive wells are fed by a highly permeable fracture network and that the less permeable matrix blocks contribute significantly to the reservoir storage capacity. Detailed analysis of data from two wells is presented. Data from both of the wells yield a reservoir permeability-thickness (kh) of approximately 1.3x10{sup 6} md-ft and a storativity of 6.8x10{sup -3} ft/psi. The parameters ({lamda} and {omega}), which are determined by the distribution of permeability and storativity between the matrix and fractures, vary by more than an order of magnitude. A sensitivity study shows that for these wells, the pressure transients are not very sensitive to the distribution of permeability and storativity between the fractures and matrix blocks. No hydrologic boundaries were detected during the test. This indicates that the fault which supplies hot water to the shallow hydrothermal system does not behave according to the cassical model of either a barrier or constant potential boundary.
Date:
December 15, 1983
Creator:
Benson, S.M.
Object Type:
Article
System:
The UNT Digital Library
Pressure Transient Analysis for Large Scale Hydraulic Injections in the Carnmenellis Granite, England
Large volume hydraulic injections into the Carnmenellis granite have been completed at the CSM Hot Dry Rock Project during the period October 1982 to July 1983, with small volume injections before and after this period. The effects of the injections on the hydraulic properties of the rock mass have been estimated by pressure transient analysis. The growth of the reservoir zone was tracked with microseismic locations, and the growth mechanism modeled with the computer program FRIP. The limited duration of the transients amenable to analysis and the tendency for growth below the injection zone meant that the interpretations could only describe hydraulic conditions within about 100 m of the wellbores. The effect of the large volume injections was to increase permeability values from less than 100 {micro}d to greater than 5 md, and to decrease skin values from about -3 to about -6. The FRIP modeling explained the observed reservoir growth in plan with reference to measured in-situ stresses, jointing and rock properties and showed some of the limitations of continuum modeling.
Date:
December 15, 1983
Creator:
Pine, R. J.
Object Type:
Article
System:
The UNT Digital Library
Gas Chemistry in Geothermal Systems
Five new gas geothermometers are introduced. They are useful for predicting subsurface temperatures in water dominated geothermal systems. The geothermometers use data on CO{sub 2}, H{sub 2}S and H{sub 2} concentrations in fumarole steam as well as CO{sub 2}/H{sub 2} and H{sub 2}S/H{sub 2} ratios. It is demonstrated that the gas composition of fumarole steam may be used with or withour drillhole data to evaluate steam condensation in the upflow zones of geothermal systems. Uncertainty exists, however, in distinguishing between the effects of steam condensation and phase separation at elevated pressures. The gas content in steam from discharging wells and the solute content of the water phase can be used to evaluate which boiling processes lead to "excess steam" in the discharge and at which temperature this "excess steam" is added to the fluid moving through the aquifer and into the well. Examples, using field data, are given to demonstrate all the mentioned applications of geothermal chemistry.
Date:
December 15, 1983
Creator:
Arnorsson, Stefan & Gunnlaugsson, Einar
Object Type:
Article
System:
The UNT Digital Library
Nonisothermal Injectivity Index can Infer Well Productivity and Reservoir Transmissivity
In geothermal wells injection tests are commonly used to obtain well and reservoir data. These tests are typically conducted in a series of step rates followed or preceded by a complete shutin. Usually the temperature of the injected fluid is different from that of the reservoir fluid. Because of the strong temperature dependence of fluid viscosity and to a lesser extent, fluid density, nonisothermally related pressure responses must be considered. The nonisothermal isjectivity index obtained from these tests depends on the mobility ratio of the cold region to the hot reservoir and the extent of the cold spot. This paper proposes a method which accounts for these effects and relates the nonisothermal injectivity index to the isothermal injectivity index.
Date:
December 15, 1983
Creator:
Sigurdsson, Omar; Bodvarsson, Gudmundur S. & Stefansson, Valgardur
Object Type:
Article
System:
The UNT Digital Library
Analysing Spinner Measurements from Well Tests Using Computerized Interpretation Techniques
The development of reliable spinner tools may help avoid much of the ambiquity which often accompanies well tests in geothermal wells, due to interlayer flows through the well bore. However, the use of both pressure and flow rate changes requires new methods of well test interpretation. The Stanford Geothermal Program has been developing microcomputer-based techniques for the simultaneous analysis of pressure and flow rate measurements. There are two key steps in the procedure. Firstly, the non-linear regression is achieved by calculating the gradients of the response (with respect to the unknown reservoir parameters) in Laplace space, and inverting numerically. Secondly, the variable flow rate is represented in terms of a superposition of many step changes - this was found to work better than a spline fit to the data. One problem was encountered when attempting to analyze data in which the spinner "stalled", causing a jump to zero flow rate. The method shows great promise in that the degrees of freedom on the interpretation are greatly reduced, the well bore storage effect disappears, and inter-feed flows do not affect the results.
Date:
December 15, 1983
Creator:
Horne, Roland N.; Guillot, Alain & Rosa, Adalberta
Object Type:
Article
System:
The UNT Digital Library
Geothermal Field Developments in Japan
The present situation of the geothermal field developments in Japan is such that eight geothermal power stations are being operated, while there are sill many geothermal areas to be explored. Up to this day, the target of geothermal exploration has mainly been the areas by surface geological survey and the existing geothermal reservoirs are located not deeper than 1,500m depth. Recent geothermal energy development shows a trend from the study on vapor dominated of liquid dominated hydrothermal resources in shallow zones to that on hydrothermal resources in deeper zones. Exploration wells of 3,000m depth class have been drilled in Japan.
Date:
December 15, 1983
Creator:
Hirakawa, Seiichi
Object Type:
Article
System:
The UNT Digital Library