The work presented here aims to construct a 3D geological model of the subsurface in the southeastern part of the Portuguese Sector of the Iberian Pyrite Belt. The model represents the three main geological formations, namely, Flysch, a volcanic-sedimentary complex, and a phyllite-quartzite group, which are visualized by the upper and lower boundary surfaces. The model also includes the main faults. Different types of geographic data (geodata) were collated and integrated. These data had distinct origins and spatial resolutions, namely, direct data (drill hole, geological mapping), indirect data (seismic reflection, gravimetric, and radiometric), and interpreted data (geological profiles). The fault surfaces were a central issue in the generation of the model, because defining them allowed the upper and lower boundary surfaces of the formations to be cut, showing the corresponding fault offsets. Of the available data, the relevance of the seismic stacked images that helped to interpret fault surfaces at depth is highlighted. In addition, the known faults in 2D were converted to 3D by defining fault depths, inclinations, and azimuths. The work also evaluates the contribution of the geodata to the 3D model representation.
|Number of pages||4|
|Issue number||Special Issue 3|
|Publication status||Published - 1 Dec 2014|
- 3D geological model
- Data integration
- Seismic sections
- Surface interpolation