Investigation of a Fluid Boundary

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Aminoil is a subsidiary of R. J. Reynolds Industries, Inc., and successor to Burmah Oil and Gas Company. Our drilling activities in the southeast part of The Geysers area have proved geothermal steam reserves to power 300 megawatts of electric generating capacity. In the past year Aminoil has conducted exploratory drilling activities outside of the proven productive area in order to establish additional reserves. One of these areas, shown in Figure 1, is discussed in the paper. The figure shows three regional lineaments, isopleths of heat flow gradients, and the locations of five holes drilled to at least 7200 feet. ... continued below

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30-33

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Frye, George A. December 1, 1976.

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Description

Aminoil is a subsidiary of R. J. Reynolds Industries, Inc., and successor to Burmah Oil and Gas Company. Our drilling activities in the southeast part of The Geysers area have proved geothermal steam reserves to power 300 megawatts of electric generating capacity. In the past year Aminoil has conducted exploratory drilling activities outside of the proven productive area in order to establish additional reserves. One of these areas, shown in Figure 1, is discussed in the paper. The figure shows three regional lineaments, isopleths of heat flow gradients, and the locations of five holes drilled to at least 7200 feet. The phenomena discussed in the paper led to the tentative conclusion that there is a fluid boundary with Locations B and C on the productive side and A, D, and E, all nonproductive. Aminoil believes the change in rock types to be significant. The change may be attributed to the lineaments although structural correlations in the Franciscan formation are difficult to substantiate. Even though there were minor steam entries in the nonproductive holes, the heat gradient surveys indicate a rapidly decreasing heat flux from the productive area. Changes in gas to steam molar ratio and the increased hydrogen sulfide at Location E may be attributable to the small volume of the steam entry with relation to the open hole surface area. However, the increased percentage of methane supports a fluid boundary conclusion. Further examination of the water in the hole at Location E is planned using a bottom hole sampler. These analyses will be designed to test for thermodynamic phase equilibrium of the fluid with known equilibria phenomena of the productive area. 2 figs.

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30-33

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  • Proceedings Second Workshop Geothermal Reservoir Engineering, Stanford University, Stanford, Calif., December 1-3, 1976

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  • Report No.: SGP-TR-20-6
  • Grant Number: E043-326-PA-50
  • Office of Scientific & Technical Information Report Number: 887306
  • Archival Resource Key: ark:/67531/metadc874073

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • December 1, 1976

Added to The UNT Digital Library

  • Sept. 21, 2016, 2:29 a.m.

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  • Nov. 29, 2016, 4:24 p.m.

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Frye, George A. Investigation of a Fluid Boundary, article, December 1, 1976; United States. (digital.library.unt.edu/ark:/67531/metadc874073/: accessed October 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.