Geologic and Reservoir Model of the Maibara Geothermal Field

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Conference Proceedings: Geologic and Reservoir Model of the Maibara Geothermal Field

Abstract

Hydrothermal alteration and fluid inclusion data were used to help develop the geologic and reservoir conceptual model of the Maibarara field. This conceptual model forms the basis for an on-going reservoir simulation study. Within the 2.5km2 proven production area, there is a good correlation between both fluid inclusion temperature and alteration mineralogy with measured wellbore temperatures, while outside this area the correlation is poor. South of the central benign chloride reservoir, acidic fluids occur along discrete stratigraphic zones, as demonstrated by the presence of pyrophyllite. On the northern margin of the field. considerable cooling has occurred due to incursion of cooler shallow fluids. A comparison of

the past (evidenced by fluid inclusions and alteration mineralogy) with the present (measured) temperatures shows that the reservoir has contracted, and the margins have cooled by at least 60°C over time. The presence of marginal cooler and acidic fluids limits the potential development size of the Maibarara resource. The installation of an 11 MWe power plant is under consideration by the National Power Corporation.

Authors 
A.C. Buban, M.F. Villadolid-Abrigo and R.B. Sta. Maria and D. Sussman






Conference 
16th New Zealand Geothermal Workshop; New Zealand; 1994/04/01


Published 
Philippine Geothermal Inc., 1994





DOI 
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Online 
Internet link for Geologic and Reservoir Model of the Maibara Geothermal Field

Citation

A.C. Buban, M.F. Villadolid-Abrigo, R.B. Sta. Maria and D. Sussman. 1994. Geologic and Reservoir Model of the Maibara Geothermal Field. Proceedings of 16th New Zealand Geothermal Workshop; Makati: Philippine Geothermal Inc..