Production Test Analysis Using Separator Method with Respect to Separator Efficiency

Abstract

Production test is one of very crucial activities in the geothermal field development process. The condition of the well, reservoir characteristics, and production capacity of the well can be determined by production test. The result of production test must be processed first to calculate the mass flow rate of the well and the data should be processed carefully to get the best possible determination. The production test unit facility can affect to the accuracy of the obtained data. Errors in production test data processing would decrease the production efficiency and will affect the deliverability curve. This study describes the production analysis results based on case studies of XYZ-well production test at Lahendong geothermal field that uses the Separator Method. The steam is measured using orifices and water is measured using a weir box. The appropriate test separator used is a separator that has a separation efficiency design that can reach over 99%. Therefore, it is necessary to evaluate the deliverability curve and the performance of separator test by looking at the result of separator efficiency value.