San Jacinto-Tizate Geothermal Field, Nicaragua- Exploration And Conceptual Model

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Journal Article: San Jacinto-Tizate Geothermal Field, Nicaragua- Exploration And Conceptual Model

Abstract
The results of the exploration of the San Jacinto-Tizate geothermal field during 1992-1995 included geological, hydrogeological and geophysical investigations (magnetotelluric, frequency soundings, subsurface temperature, and soil-gas surveys), and the drilling and testing of seven deep wells (728-2339 m). The geothermal field, located within a composite volcano-tectonic depression, can be divided into two main areas: San Jacinto and Tizate. The San Jacinto area shows evidence of a high-temperature (250-300°C) fossil geothermal system that at present has reservoir temperatures in the 180-190°C range. In the Tizate area there is an active geothermal system with temperatures of 250-285°C. An upflow zone with an excess pressure gradient exists in the central part of this area. Two hydraulically connected reservoirs exist: a shallow one at 550-1200 m depth, and a deeper one below 1600m. Two-phase conditions exist in the upper part of the shallow reservoir. Production tests demonstrate the commercial potential of both Tizate reservoirs.

Authors 
Serguei V. Ostapenko, Serguei V. Spektor and Yuri P. Netesov








Published Journal 
Geothermics, 1998





DOI 
10.1016/S0375-6505(98)00007-8


 

Citation

Serguei V. Ostapenko,Serguei V. Spektor,Yuri P. Netesov. 1998. San Jacinto-Tizate Geothermal Field, Nicaragua- Exploration And Conceptual Model. Geothermics. (!) .