3D conceptual modeling of “X” geothermal field system

X geothermal field which is being developed by PT. PLN (Persero) with the status is still being explored in progress for development. PT PLN (Persero) has drilled 5 exploration wells from 6 planned wells in the X geothermal working area (WKP), at Eastern Indonesia. The five wells are TLU-D1, TLU-01, TLU-B1, TLU-B2 and TLU-C1. From the results of the fifth well it is necessary to evaluate and update the conceptual model which is expected to provide clearer information on the distribution of heat from the existing geothermal system. The problem of the X Geothermal Field is finding the direction of maximum permeability and heat sources and the amount of electrical energy that can be generated. This research has problem limitations in the simulation of geothermal system modeling and the determination of its electrical energy reserves (MWe). The method used in the conceptual review of geothermal system models is modeling using leapfrog software for simulations after the addition of new drilling data. In the modeling the simulation is done by using a 3 Dimension (3D) image to make it easier to interpret the existing geothermal system, so that it will be easier to determine the shape and distribution of the heat source and its reservoir. The results of this modeling simulation were obtained clearly at a depth of -1750m with a shape that resembles a pear that extends and width to the southeast - south of this study. According to the heat distribution pattern, it can be estimated that the outflow is towards the east while the upflow looks to be directed south.