Enthalpy Transients in Fractured Two-Phase Geothermal Systems
- Key words
- Reservoir Models; Parameters; Numerical Modeling; Enthalpy; Fractures; Permeability; Phase; Two Phase; Porosity
- Conference
- Geothermal Resources Council Transactions
- Year
- 1985
- Session
- Thermodynamics; Two phase flow; Permeability; Reservoir mode
- Language
- English
Abstract
Numerical modeling techniques are used to study the changes in flowing enthalpy of fluids produced from a well completed in a fractured two phase geothermal reservoir. Complex interactions between different fracture and porous matrix parameters control the enthalpy transients. The results show that the flowing enthalpy is most sensitive to the characteristics of the relative permeability curves, the magnitude of the matrix permeability and the effective fracture porosity. Other parameters such as the thermal conductivity and fracture spacing also significantly affect the flowing enthalpy. In spite of the complex phenomena associated with enthalpy transients in fractured two phase systems, it is possible to infer useful information about the producing geothermal reservoirs from field data.
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