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- W2559601701 abstract "Geothermal exploration aims at locating favourable areas for exploitation. To reach this goal, various disciplines are implemented. Among the most common ones are geology, geophysics and geochemistry. Data are generally acquired in the field, such as geological observations, gravimetric surveys or thermal sources sampling. These data are interpreted to characterize the geometry, and the properties of the studied zone. They provide separate but complementary information to understand the area explored. However, combining geological, geophysical and geochemical interpretations is not an easy task. In such a context, one of the main difficulties lies in how to mix all the information to infer a coherent geothermal conceptual model. Merging them in the same space can help their combination to lead to a consistent understanding. First of all, this methodology allows to check the location of separate figures and to ensure their coherence. Moreover, it makes possible to build an overall interpretation based on various information. GeoModelling in 3-dimensions is an interesting candidate for this job because it allows to input materials from various origins to achieve an interpretation of the geothermal area. GeoModelling provides a common platform for interpretation during the exploration phase of a geothermal project. The final model can be completed through successive stages bringing new information at each step. For instance, a preliminary 3D geomodel can be based on very rough data from bibliography, even before any field work dedicated to the exploration. In a second time, geological data can be observed on the ground and incorporated in the model to refine the interpretation. The process can be continued using a gravimetric survey to improve the model at depth. Then, magnetotelluric resistivity can be injected in the model to infer possible fluid occurrence. Finally, location and properties of geothermal springs can be displayed in the 3D model to complete the interpretation. This kind of interdisciplinary workflow leads to a coherent geomodel filled by geology, geophysics and geochemistry. Making a 3D geomodel by associating complementary interpretations is an interesting perspective but giving the experts of each discipline the opportunity to interact in a democratic process is even more powerful. Indeed, geological, geophysical, and geochemical interpretations are not disconnected. Even if a preliminary work has to be carried out separately by each discipline, the interpretation coming from one can be fed by the others instead of putting them one after the other in a sequential workflow. To do so, the methodology has to be object oriented, where the central object is the 3D geomodel. In this light, the 3D model benefits from a common interpretation implemented jointly by geologists, geophysicists and geochemists. In other words, they can compare, connect, discuss, and adapt their own approaches for a mutual result in a GeoModelling environment. At the end, the conceptual model is not a conglomerate of distinct interpretations but a consensus shared by the contributors. The methodology described above is illustrated with two examples. These case-studies show how 3D GeoModelling is helpful to infer a democratic interpretation during the exploration phase. Beyond the interpretation for exploration, the geomodel can be enhanced during the next phases, when new data are acquired, to provide an up-to-date image of the investigated region. Such a 3D model can also be used to mesh the geometry of the zone and to compute dynamic simulations." @default.
- W2559601701 created "2016-12-08" @default.
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- W2559601701 date "2015-04-19" @default.
- W2559601701 modified "2023-09-23" @default.
- W2559601701 title "3D GeoModelling for a Democratic Geothermal Interpretation" @default.
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