| Title | 3-D Preliminary Reservoir and Isothermal Models Based on Exploration Data |
|---|---|
| Authors | Mona Natalia SIAHAAN, SURYANTINI, Angga Bakti PRATAMA |
| Year | 2016 |
| Conference | Stanford Geothermal Workshop |
| Keywords | 3-D model, reservoir, isothermal, leapfrog geothermal |
| Abstract | Interpretation of subsurface conditions is limited during the exploration stage. Integrated geoscientific data must be utilized in order to have a proper understanding about subsurface condition, especially for defining components of a geothermal system. This integrated description is usually conducted using 2-D modelwhich is derived from cross-sections and maps. 2-D representation has limitation and less informative, since they cannot give detailed information about the reservoir’s depth and volume. In order to have a better visualization quantification, and understanding of geothermal system, a 3-D model is considered as a more useful approach to represent the geothermal elements. This paper presents tools and techniques for constructing 3-D preliminary geothermal reservoir and isothermal models, based on geoscientific data. The modeling procedure is carried out using Leapfrog Geothermal software. The first step to build an integrated model is to create geological model, based on interpretation of surface and structural mapping. Geological framework can give a better understanding of other geothermal elements.The 3-D isothermal model can be performed based on geochemical studies and gradient geothermal calculation. 3-D interpolation technique is used to generate interpolant models. The reservoir model then subsequentlybe represented using cross-section and maps. 3-D reservoir model extent are interpreted from conceptual model based on MT-derived resistivity, structural features, indication of up-flow manifestation features, then refined by isothermal model. All these visualizations will help broaden the understanding of temperature distribution in the geothermal field and reduce the uncertainty of the interpretation of the subsurface condition. This result should then be useful as a guide for future determinations of exploration drill holes location. |