Tracer test analysis of the Klamath Falls geothermal resource: a comparison of models

Technical Report · Fri Jun 01 04:00:00 EDT 1984

DOI:https://doi.org/10.2172/5626421· OSTI ID:5626421

Johnson, S E

Two tracer tests on doublet systems in a fractured geothermal system were carried out in Klamath Falls, Oregon. The purpose of the tests were to obtain data which would lead to information about the reservoir and to test the applicability of current tracer flow models. The results show rapid breakthrough times and indicate fracture flow with vigorous mixing of injector fluid before production of same. This leads to the idea that thermal breakthrough is not directly related to tracer breakthrough in the Klamath Union doublet system. There has been no long-term enthalpy loss from exploiting the resource for 40 years. In order to reduce the data, models were developed to analyze the results. Along with a porous media flow model two mathematical models developed to analyze fractured geothermal systems are used to help decipher the various tracer return curves. The flow of tracers in doublet systems was investigated. A mathematical description is used for tracer flow through fractures as a function of time and various nonlinear parameters which can be found using a curve fitting technique. This allows the reservoir to be qualitatively defined. These models fit the data well, but point to the fact that future improvement needs to be considered for a clearer and more quantitative understanding of fractured geothermal systems. 22 refs., 32 figs., 11 tabs.

• Research Organization: Stanford Univ., CA (USA). Stanford Geothermal Program
• DOE Contract Number: AT03-80SF11459
• OSTI ID: 5626421
• Report Number(s): SGP-TR-81; ON: DE85009924
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
150904* -- Geothermal Engineering-- Geothermal Reservoir & Well Performance
COMPUTER CODES
ENTHALPY
FLUID FLOW
FRACTURED RESERVOIRS
GEOLOGIC FRACTURES
GEOLOGIC STRUCTURES
GEOTHERMAL SYSTEMS
Geothermal Legacy
ISOTOPE APPLICATIONS
KGRA
KLAMATH FALLS
MATHEMATICAL MODELS
P CODES
PHYSICAL PROPERTIES
REINJECTION
THERMODYNAMIC PROPERTIES
TRACER TECHNIQUES