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Título del libro: Proceedings - Spe Annual Technical Conference And Exhibition
Título del capítulo: A parallelepiped model to analize the pressure behavior of geothermal steam wells penetrating vertical fractures

Autores UNAM:
HEBER CINCO LEY;
Autores externos:

Idioma:
Inglés
Año de publicación:
1979
Palabras clave:

Engineers; Fracture; Gasoline; Geometry; Geothermal fields; Constant pressures; Geothermal reservoir; Impermeable boundary; No-flow boundaries; Reservoir parameters; Reservoir pressures; Transient pressures; Well interference tests; Geothermal wells


Resumen:

Reservoir geometry is often the basis for development of models used to analyze field transient pressure data. The presence of a deep horizontal steamwater interface or boiling front first gave rise to the idea of a constant pressure boundary. Faults suggest vertical no-flow boundaries, and impermeable rocks overlying the steam zone indicate a no-flow cap. In the past, parallelepiped models have been used to analyze the results of predesigned buildup and well interference tests. The model described herein is of more general use, and can be used to analyze long-term pressure-production well data. In this study, it is applied to analyze pressure data of a drawdown test for a geothermal reservoir. As in earlier models, the boiling front is assumed to be a constant fluid-pressure boundary, and the sides-as well as the top-are assumed to be impermeable boundaries. Equations of reservoir pressure behavior are derived using Green's functions and source functions. Graphs describing dimensionless pressure as a function of time and various reservoir parameters are provided. Partially penetrating fractures common to many geothermal well systems are considered in the development of the model. © Copyright 1979, American Institute of Mining, Metallurgical, and Petroleum Engineers. Inc.


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