| Abstract |
Exploitation of Palinpinon 2 Production Field (P2PF) started in December 1993 to augment the rising power demands of Negros, Panay, and Cebu Islands. It is located at the Southern Negros Geothermal Production Field (SNGPF) in the province of Negros Oriental and managed by the Philippine National Oil Company-Energy Development Corporation. It supplies steam to the 4 x 20 Mwe modular power plants of the National Power Corporation (NPC), totaling 80 Mwe. P2PF comprises four Fluid Collection and Recycling Systems (FCRS); namely the 20 MW Nasuji, 20 MW Balas-balas, and the 2 x 20 MW Sogongon modules. The FCRS is carefully monitored and assesses for problems, solutions and operation strategies. Such problems include production and injection wells' utilization, reduction of steamfield capacity, injection returns, and wastewater (brine) disposal. Efficient utilization of production and injection wells are implemented to sustain the required steam consumption of the power plants. Interconnection of steamlines and injection lines are beneficial in optimizing flexibility and performance of the geothermal field. As the need arises, well work-over and acidizing are conducted to increase field steam capability and strategic injection scheme. Strategic wells' utilization is adopted to minimize injection breakthrough and prevent cooling of affected wells. Assessment of wells; bore output and capacity is implemented to support the daily steam consumption of the power plants. Silica deposition in FCRS pipelines is of tolerable amount due to the lower silica saturation index, lerr-intricate pipeline configuration and appropriate well utilization strategy. The Zero Disposal System, which is integrated in the FCRS, is also discussed. The system conforms to DENR standards of zero waste disposal to the environment- making PNOC-EDC one of the cleanest and environment-friendly company in the Philippines. |