An industry-DOE cost-shared project is underway to evaluate the technical feasibility of developing an EGS power generation project on the eastern side of the Desert Peak geothermal field. Analysis...
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An industry-DOE cost-shared project is underway to evaluate the technical feasibility of developing an EGS power generation project on the eastern side of the Desert Peak geothermal field. An...
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The purpose of this study was to verify quantitatively and to refine the conceptual hydrogeological model of the Mofete Geothermal field near Naples, Italy, using a numerical simulator. A three-...
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Geothermal power generation and mineral extraction from geothermal brines are affected by chemical processes within the reservoir. Until recently, numerical simulation technology for geothermal...
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The resource risk in connection with the financing of geothermal
projects can be subdivided into questions of: resource existence,
resource size, deliverability, cost of development and operation...
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A numerical simulation model of The Geysers geothermal field,
California, has been developed using reservoir and production
data provided by UNOCAL, Calpine, NCPA and CCPA. The
model was...
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Under the premise that the behavior of enhanced geothermal
systems (EGS) will be dominated by fracture flow, this paper
reviews the special features that would be required of any
practical...
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This paper presents the results of a continuing study of
geopressured resources in California. Three aspects of
geopressured resources were examined in this study: the
identification of...
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Data collected since 1985 from test drilling, fluid sampling, and geologic and geophysical investigations provide a clearer definition of the hydrothermal system in Long Valley caldera than was...
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Many sedimentary formations, including some that contain oil or gas, may be hot enough to serve as commercial geothermal reservoirs. Unlike conventional geothermal reservoirs which generally occur in...
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There are three types of petroleum wells potentially capable of supplying geothermal energy for electric power generation: (a) a producing oil or gas well with a water cut, (b) an oil or gas well...
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This paper investigates the practical range of net power capacity available from conventional and Enhanced Geothermal System (“EGS”) wells as a function of temperature. For a geothermal resource...
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NCPA is the developer and operator of the second-largest power installation at The Geysers steam field in California, generating some 120 MW at the southern end of the reservoir using 68 production...
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Underground fluid injection is important to a geothermal project for a number of reasons: (i) to avoid any environmental impact arising from surface disposal, (ii) to provide pressure support to the...
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This paper presents an evaluation of the cost of electric power from Enhanced Geothermal Systems (EGS), that is, reservoirs with sub-commercial permeability enhanced by hydraulic stimulation. The...
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This paper analyzes the sensitivity of the levelized cost of
geothermal power to: (a) capital cost; (b) operations-d-maintenance
(O&M) cost; (c) make-up well drilling cost; (d) resource...
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Pressure decline within The Geysers geothermal reservoir has resulted in decreased power output from existing power plants. As a means of partially arresting these ,pressure declines, several field...
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In the design of geothermal installations, the possibility of scale precipitation caused by silica over saturation has often been taken as a design constraint upon steam separation pressure. At...
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The U.S. Department of Interior has assigned to the US Geological Survey (USGS) the task of conducting an updated assessment of the geothermal resources in the United States. In that connection, we...
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Pressure decline within The Geysers geothermal reservoir has resulted in decreased power output from existing power plants. As a means of partially arresting these ,pressure declines, several field...
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