skip to main content

Title: Thermal investigation in S. Pedro do Sul low enthalpy geothermal field (Portugal)

The S. Pedro Sul thermal springs are one of the most important low enthalpy geothermal areas in mainland Portugal. The water temperature at emergence points can reach values as high as 67{degrees}C with water flows of 10 l/s. Based on silica geothermometry, the regional heat flow density is estimated as 170 m W/m{sup 2}, and the heat production of the S. Pedro do Sul granite, that crops out in the region where the thermal springs are located, is about 11 {mu}W/m{sup 3}. These values allow an estimate that the depth of the geothermal reservoir is about 2,000 metres. The geothermal reservoir is fed by meteoric water that is heated to temperatures of about 130{degrees}C at 2,000 metres depth. Then, the heated water flows to the surface through the Termas fault, mixing with colder water at shallow depths.
Authors:
; ; ;  [1]
  1. Universidade de Evora (Portugal)|[Instituto Geologico e Mineiro, Alfragide (Portugal)|[Instituto Geologico e Mineiro, Lisboa (Portugal)
Publication Date:
OSTI Identifier:
602661
Report Number(s):
CONF-971048-
TRN: 98:001318-0024
Resource Type:
Conference
Resource Relation:
Conference: Geothermal Resources Council (GRC) annual meeting, San Francisco, CA (United States), 12 Oct 1997; Other Information: PBD: 1997; Related Information: Is Part Of Meeting the challenge of increased competition; PB: 665 p.
Publisher:
Geothermal Resources Council, Davis, CA (United States)
Country of Publication:
United States
Language:
English
Subject:
15 GEOTHERMAL ENERGY; 58 GEOSCIENCES; PORTUGAL; GEOTHERMAL RESOURCES; GEOTHERMOMETRY; THERMAL SPRINGS; GEOTHERMAL ENERGY; RESOURCE DEVELOPMENT