A methodology is derived for calculating the
static pressure normalized flow rate histories
of wells from the usual production records kept
by operators, namely, flow rate and flowing
wellhead...
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Drilling or recompletion of production wens with two or
more producing wen bores is a technique that has been used
successfully by several operators in the southwestern part of
the Geysers field...
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Most theoretical fundamentals of geothermal geochemistry
were established by the mid-1980s, as were numerous practical
applications of these fundamentals to geothermal resource
evaluation and...
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This paper describes a low-risk, low-cost and modular
alternative to the conventional Hot Dry Rock or Enhanced
Geothermal Systems (EGS). In this approach, which we
have named the Earth Energy...
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This paper presents an analysis of power generation
prospects from Enhanced Geothermal Systems (EGS),
specifically, reservoirs with subcommercial permeability
enhanced by hydraulic stimulation....
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This paper derives the relation between productivity and
pressure decline trends in a geothermal steam reservoir. At all
stages of a geothermal project, the economics is affected by the
rate of...
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The Rye Patch geothermal field is a classic Basin-and-Range
resource with a "blind" anomaly, moderate temperature and
"deep circulation" as the source of heat. This paper...
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This paper presents a technical feasibility analysis of the
Western Geopower Corporation’s (“WGP”) 25.5 MW Unit 1
power project at The Geysers steam field, California; the WGP
leasehold covers 567...
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Non-condensible gas and stable isotope data from the
extreme northwest end of The Geysers steam field indicate
that this part of the reservoir consists of a deeper zone,
below about -8,000 feet...
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At the request of the United States Department of
Energy, the author was asked by the Geothermal
Energy Association (Washington, D.C.) to prepare a
white paper on the subject (in connection with a...
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Based on a review of the Enhanced Geothermal Systems (EGS)
developed to date worldwide, numerical simulation of idealized
EGS reservoirs, economic sensitivity analysis, and practical...
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This paper presents an analysis of the sensitivity
of the cost of geothermal power to: (a) capital
cost; (b) operations-and-maintenance (O&M)
cost; (c) make-up well drilling cost; (d) resource...
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This paper presents the case history of the first significant
expansion of the installed power capacity in two decades at The
Geysers steam field (California), which has been producing commercial...
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The technique of completing or recompleting production
wells as multiple-legged or "forked" wells has been
successfully applied in the Aidlin area of the northwest
Geysers field. Wells...
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This paper investigates the economics of steam
production at The Geysers from the point of view
of a field developer. We present a cash-flow
analysis and the calculation of several
profitability...
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Injection of steam condensate back into the
Geysers reservoir produces shifts in the
chemistry of produced steam at nearby wells.
Specifically, these effects include: 1) changes
in the spacial...
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There is a persistent perception worldwide that The Geysers
field is a classic example of everything that could go wrong
with geothermal power development. This presentation analyzes
the history...
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A DOE-Industry cost-shared project is underway at Desert
Peak East, located within the Hot Springs Mountains, northwestern
Churchill County, approximately SO miles (80.S km) northeast
of Reno,...
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This spreadsheet is a compilation of thermal spring temperature observations compiled by the California Division of Oil, Gas and Geothermal Resources, published as a Web feature service for the...
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Franciscan rocks in The Geysers Geothermal Resources
Area (GRA) constitute a greatly deformed and
chaotic assemblage of rocks known as melange which,
under natural conditions, poses problems to...
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2 members