Geologic modelling
![Geological mapping software displaying a screenshot of a structure map generated for an 8500ft deep gas & Oil reservoir in the Erath field, Vermilion Parish, Erath, Louisiana. The left-to-right gap, near the top of the contour map indicates a Fault line. This fault line is between the blue/green contour lines and the purple/red/yellow contour lines. The thin red circular contour line in the middle of the map indicates the top of the oil reservoir. Because gas floats above oil, the thin red contour line marks the gas/oil contact zone.](/Images/godic/202501/15/Contour_map_software_screen_snapshot_of_isopach_map_for_8500ft_deep_OIL_reservoir_with_a_Fault_line3704.jpg")
![A 3D finite difference grid used in MODFLOW for simulating groundwater flow in an aquifer.](/Images/godic/202501/15/MODFLOW_3D_grid3704.png")
![Gravity Highs](/Images/godic/202501/15/Gravity_Highs3704.jpg")
Geologic modelling, Geological modelling or Geomodelling is the applied science of creating computerized representations of portions of the Earth's crust based on geophysical and geological observations made on and below the Earth surface. A Geomodel is the numerical equivalent of a three-dimensional geological map complemented by a description of physical quantities in the domain of interest. Geomodelling is related to the concept of Shared Earth Model; which is a multidisciplinary, interoperable and updatable knowledge base about the subsurface.