| Abstract |
The current steam production in the Palinpinon -1 Geothermal field is affected by the combined effects of injection returns, pressure drawdown and mineral blockage induced by the continuous mass extraction of the field. Aggravating this situation /s the deteriorating efficiency of the power plant, significantly increasing the steam consumption to produce the same power output generated during the full load operationo f the powerp lant 15 years ago. Some production wells were rendered non-productive due to effects of injection returns from Puhagan injection secfor (Rl) and via Ticala fault during the initial operation of the plant. These were shut and relegated as "Cannot Be Used" (CBU) wells. However, changes rn the reseruoir condition brought about by the implementation of effective production and injection management strategies warrant their reutilization for steam production. The proposed mechanical workover in conjunction with acid stimulation of these CBU wells offers a cheaper and operationallya cceptableo ption to increaset he steam supply. Moreover, perforation of the cased-off hot zone in PN17D, one of the CBU wells, to tap the shallow two-phase fluid could further increase tfs output. This paper discusses the reseruoir processes affecting the CBU wells and the total steam field capability of Palinpinon 7, and the corresponding reseruoir management interuentions implemented to address the adverse effects that eventually guaranteedt he re-utilizationo f said wells. Moreover, the paper presenfs the projected recoveries in the outputs from these wells. |