| Abstract |
To date, Kamojang has been operating for over 30 years in commercial operation. The first commercial operation was in 1982 of Unit-1 power plant 30 MWe (power plant belong to PT. Indonesia Power), subsequently an additional 110 MW of Unit-2 and Unit-3 (power plant belong to PT. Indonesia Power) was opened for operation in 1987 and to date the Kamojang exists with a total capacity of generation 200 MWe. The last power plant, Unit-4 generates 60 MWe in 2008 (where the steam field and power plants belongs to PERTAMINA). PERTAMINA intended to develop with the capacity of generating from 200 MWe to 230 MWe and next step development by evaluation the response of the reservoir during the previous step development is used to estimate the size of next development step. The Kamojang geothermal field is one of the world’s few developed dry steam reservoir. Unbalance mass extraction where less than 30% of steam can be recovered to be a condensate, it’s a serious concern in reservoir management special on apply of reinjection strategy to maintain reservoir performance. A good reinjection strategy is the key for a sustainable steam supply to power plan. Some of injection does not give any impact to maintain the productivity yet, some of injection give good response to minimize decline but other hand also cause the loss productivity. To anticipate it, reinjection strategy changed by repositioning the reinjection well in. Within evaluation of reinjection management trough production data monitoring of active production well in qualitatif will give description percentage of condensate mass recover to be steam. On this paper will show simple evaluation of production performace monitoring data from group of group production well PL-401, 402, 403 and 404 where support total capacity 140 MW in Kamojang geothermal fields. |