Geophysics studies the subsurface without excavation, using seismic, electrical, or gravimetric data. 3D technology transforms this data into volumetric models, enabling the visualization of complex geological structures. A clear example is oil exploration: with 3D models, hydrocarbon traps are identified with precision, reducing drilling costs. Key software: Petrel, GOCAD, Leapfrog Geo, and ParaView for visualization.
From points to volume: the workflow in 3D software 🛠️
The process begins with importing seismic data in SEG-Y formats. Software like Petrel allows interpreting horizons and faults in 2D sections, then interpolating 3D surfaces. GOCAD models geological bodies with triangular meshes. Leapfrog Geo uses implicit interpolation to create reservoir models. Finally, ParaView renders volumes with transparencies and dynamic cuts. Hardware with a dedicated GPU and at least 32 GB of RAM is required to handle dense grids.
When the 3D model says there's oil and you only find water 💧
Sure, you model a perfect anticlinal structure, with sealing faults and 20% porosity. You get to the field, drill, and the well geologist calls you excitedly: it's saltwater. The 3D model was so beautiful you even printed it in resin. Now you have a 200-euro paperweight representing your failure. But no problem: you adjust parameters, change the fault interpretation, and the new model promises oil. Again.