PRESSURE RESPONSE TO PRODUCTION AND INJECTION AT THE MIRAVALLES GEOTHERMAL FIELD

摘要

The Miravalles Geothermal Field has been producing electric energy since March 1994. It has provided steam for Unit 1 (55 MWe, installed 1994), a wellhead unit (5 MWe, 1995), Unit 2 (55 MWe, 1998) and Unit 3 (27.5 MWe, 2000). Unit 5, a 15.5 MWe "bottoming cycle" unit, is expected to complete its final tests by February 2004, at which point the total installed capacity in Miravalles will be 158 MWe. The behavior of reservoir pressure during the period of exploitation is described in the following sections. Over the first ten years of exploitation, the field has successfully supplied the steam needed to generate at the installed capacity.