Reinjection Experience in the Philippines

Abstract

Reinjection trials have assisted with the environmentally acceptable disposal of geothermal brine during testing of the Tongonan and Palimpinon fields as well as determining the effects of fluid injection on wells and reservoirs. Well parameters were measured to provide ine data and well performance has been monitored at appropriate intervals. generally been encouraging with an increase in injectivity as injection has proceeded. In the few trials where a decrease in injectivity has occurred, it has been associated with an interruption to reinjection. investigation. Tracer tests have been used to track subsurface fluid movement and the results have indicated rapid communication between injection and product ion 1 though tracer returns have been small. Reinjection testing continues and the accumulation of experience will be expanded substantially by the imminent commissioning of the Leyte I and Palimpinon I power stations.