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Northwest Geothermal Corp. 's (NGC) plan of exploration, Mt. Hood Area, Clackamas County, Oregon

Description: The Area Geothermal Supervisor (AGS) received a Plan of Operations (POO) from Northwest Geothermal Corporation (NGC) on 2/12/80. In the POO, NGC proposed two operations: testing and abandoning an existing 1219 meter (m) geothermal temperature gradient hole, designated as OMF No. 1, and drilling and testing a new 1524 m geothermal exploratory hole, to be designated as OMF No. 7A. The POO was amended on 5/6/80, to provide for the use of an imp
Date: May 1, 1980
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Breakthrough Time for the Source-Sink Well Doublet

Description: A pressure transient analysis method is presented for interpreting breakthrough time between two constant rate wells. The wells are modeled as two line source wells in an infinite reservoir. The first well injects at a constant rate and the second well produces at a constant rate. We studied the effects of transient pressure conditions on breakthrough time. The first arrival of injected fluid at the production well may be significantly longer under transient condition than under steady state co… more
Date: January 21, 1986
Creator: Menninger, Will & Sageev, Abraham
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Partner: UNT Libraries Government Documents Department
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Laboratory measurement of sorption in porous media

Description: A new apparatus for measuring steam adsorption-desorption isothermally on rock samples has been installed and initial runs made for rock samples from geothermal reservoirs. The amounts adsorbed measured in these experiments are the same order of magnitude as previous experiments.
Date: January 1, 1992
Creator: Harr, M. S.; Pettit, P. & Ramey, J. J., Jr.
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Partner: UNT Libraries Government Documents Department
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Development of PDC Bits for Downhole Motors

Description: To develop polycrystalline hamond compact (PDC) bits of the full-face type which can be applied to downhole motor drilling, drilling tests for granite and two types of andesite were conducted using bits with 98.43 and 142.88 mm diameters. The bits successfully drilled these types of rock at rotary speeds from 300 to 400 rpm.
Date: January 1, 1995
Creator: Karasawa, H. & Ohno, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis of production decline in geothermal reservoirs

Description: The major objectives of the Decline Curve project were to: (1) test the decline analysis methods used in the petroleum industry on geothermal production data; (2) examine and/or develop new analysis methods; and (3) develop a standard operating procedure for analyzing geothermal production data. Various analysis methods have long been available but they have not been tested on geothermal data because of the lack of publicly available data. The recent release to publication of substantial data s… more
Date: September 1, 1980
Creator: Zais, Elliot J. & Bodvarsson, Gunnar
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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United States geothermal technology: Equipment and services for worldwide applications

Description: This document has two intended audiences. The first part, ``Geothermal Energy at a Glance,`` is intended for energy system decision makers and others who are interested in wide ranging aspects of geothermal energy resources and technology. The second part, ``Technology Specifics,`` is intended for engineers and scientists who work with such technology in more detailed ways. The glossary at the end of the document defines many of the specialized terms. A directory of US geothermal industry firms… more
Date: May 1, 1995
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A baseline study of the health status of the residents in Kalapana, Hawaii, January--June 1987

Description: A community health survey was conducted during the first five months of 1987 in Kalapana, Hawaii. Some 676 residents were interviewed during the study, which represents some 82% of all households in the community. The goal was to obtain base-line data on the health status of all community residents and ambient air quality, in order to evaluate any changes in health status of residents after geothermal development in the area.
Date: August 1, 1988
Creator: Johnson, David B. & Arbeit, William, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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P. G. and E. Geysers Retrofit Project, Units 1-12: Final Report, Technical Data, Volume I - Sections 1-8

Description: The purpose of this work is to demonstrate whether there is a cost benefit to Pacific Gas and Electric Company in replacing the present iron catalyst/caustic/peroxide system used in the direct contact condenser units with an alternative approach using surface condensers and the Stretford System for hydrogen sulfide abatement.
Date: August 24, 1979
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Geothermal Progress Monitor. Report No. 15

Description: Two themes dominate this issue of the Geothermal Progress Monitor, the 15th since its inception in 1980. The first of these is the significance of the government/industry partnership role in geothermal development. This joint effort is reflected in the continued, measured growth in the use of geothermal energy, for both power generation and direct use applications, in this country and abroad, as well as in the development of new, innovative technologies to ensure a bright future for the resourc… more
Date: December 1, 1993
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Geothermal development of the Salton Trough, California and Mexico

Description: A geological description is given of the Salton Trought followed by a chronological history of attempts to exploit the area's geothermal resources. In addition, detailed descriptions are given of all ongoing geothermal projects in the area and the organizations conducting them.
Date: April 1, 1975
Creator: Palmer, T. D.; Howard, J. H. & Lande, D. P. (eds.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Disposal of Flashed Brine Dosed with CaCO{sub3} Scale Inhibitor: What Happens When the Inhibitor is Exhausted?

Description: A freshly flashed geothermal liquid, previously dosed with inhibitor and super-saturated with calcite was injected into another well where it displaced an unflashed counterpart of itself around the wellbore. Back-production of the injectate, and subsequently the native fluid, has yielded data for the rate that a scale inhibitor is degraded after injection. The circumstance also displays a novel mechanism whereby two fluids that do not physically mix never the less reactive with one another thro… more
Date: December 15, 1983
Creator: Michels, D. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Modifications to tough and analysis of build-up data of PTS (Pressure/Temperature/Spinner) logging in a two-phase condition

Description: The original version of TOUGH (Pruess, 1987) requires a large amount of CPU time for large 2D or 3D problems. This has prevented us from using the original TOUGH on several actual field simulations. Therefore, we have modified the original TOUGH to make less CPU time and allow us to use new TOUGH on large problems. For reducing the CPU time, two new matrix inversion methods were implemented on the original TOUGH. In this report, first we summarize new matrix inversion method implemented in new … more
Date: January 1, 1991
Creator: Okabe, T.; Osato, K. & Takasugi, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Industrial Consortium for the Utilization of the Geopressured-Geothermal Resource. Volume 1

Description: The Geopressured-Geothermal Program, now in its fifteenth year, is entering the transition period to commercial use. The industry cost-shared proposals to the consortium, represented in the presentations included in these proceedings, attest to the interest developing in the industrial community in utilizing the geopressured-geothermal resource. Sixty-five participants attended these sessions, two-thirds of whom represented industry. The areas represented by cost-shared proposals include (1) th… more
Date: March 1, 1990
Creator: Negus-deWys, J. (ed.)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Annotated research bibliography for geothermal reservoir engineering

Description: Despite efforts of conscientious researchers, the current volume of published materials makes it virtually impossible to review all relevant publications in a given field. As a result it has been estimated that approximately one-tenth of the research and development funds expended in the United States has been applied to areas resulting in a duplication of efforts. This has been attributed to inadequate literature review. An up-to-date annotated bibliography has been prepared which assisted in … more
Date: January 1, 1978
Creator: Randall, G.S. & Harrison, R.F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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National advanced drilling and excavation technologies program: Summary of third meeting of interested Federal agencies

Description: The purpose of the meeting was: (1) to discuss a proposal by the Massachusetts Institute of Technology (MIT) outlining a National Advanced Drilling and Excavation Technologies Program, (2) to brief participants on events since the last meeting, and (3) to hear about drilling research activities funded by the Department of Energy. The meeting agenda is included as Attachment B.
Date: December 7, 1993
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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