A dministratively field research is located in Muara Enim, South Sumatra Province. The object of research in this study is the geochemical characteristics of the geothermal surface manifestations that appear on the surface. There are two types of manifestation that arise are hot springs and fumaroles. The hot springs that come to the surface have a high temperature nearly 100⁰C with sulphuric water type, water bicarbonate and chloride water. These manifestations appear due to tectonic activity that works in the area of research. This field is dominated by volcanic rock lithology. Geothermometer calculation results indicate that this field has a high enthalpy geothermal systems with a temperature range of 220ºC to 250ºC. Upflow zone of this field is located in the middle of the study area. Fluid flows into the northeast toward the outflow zones are located in the Northeastern. This determination is reinforced by the emergence of chloride water in areas with low elevation. Reserves in the field "AG" is based on the calculation of the power density of 300MWe/km2, while the volumetric methods based on a potential of 254 MWe at reservoir temperature of 245ºC with a thickness of reservoir 1980m. Silica scaling and corrosion occur on the field "AG" but there is little potential views of the pH which ranged from 6.42 to 6.61, and the presence of minerals that are included in the neutral category. Suggestions on silica scaling exploration wells AGZ-A should not be operated with a preasure less than of 7.92 bars and the well exploration AGZ-B should not be operated with a pressure of less than 6.18 bars to avoid silica scaling.