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Modeling Services and Software

Your partner for addressing exploration and monitoring challenges with multiphysics

Our in-house-developed multiphysics 3D inversion suites, RLM-3D and Otze, cover a wide range of technologies and are adoptable to any configuration and geological setting. Our expertise includes: 

  • Flexible regularization options enabling tailored structural control and honoring of prior information
  • Joint inversions between different disciplines to reduce uncertainty and provide better resolution of rock properties
  • Linking between different geophysical properties by use of cross-gradients or clustering techniques
  • Inversions geologically steered by promoting structural similarity from prior gradients

Contact us for solutions as a service or for software licensing options.


    Supported natural field EM induction methods in our modeling code RLM-3D include magnetotellurics (MT) and airborne AFMAG setups like ZTEM or MobileMT, honoring true sensor locations. In MT inversions, inversion for galvanic distortion matrices may account for the impact of so-called ‘static’ effects. 

    Our inversion engine is installed on our secure Viridien-Cloud accessible to our Geotools clients. Geotools users run their 3D MT inversions efficiently on our cloud by using intuitive workflows for inversion setup and result retrieval, and with convenient control options for monitoring inversion status and progress. 

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    Airborne EM

    Active source airborne EM data are modeled using our versatile Otze inversion engine with vertically unstructured model grids and a moving footprint approach, ideal for airborne setups. Otze can be adopted to any system configuration, whether in time (Helitem, VTEM, SkyTEM, etc.) or frequency domain (Dighem, Resolve, etc.) systems.

    EM inversions may be laterally constrained 1D, 2D, or using full 3D solvers, optionally incorporating geological a priori information like structural trends via a cross-gradients approach. EM effects from magnetic susceptibility can be jointly estimated with resistivity inversions.

    Marine and land EM

    Modeling of active source CSEM data for marine hydrocarbon exploration was an early focus in the development of our multiphysics inversion routines. Our inversion engines RLM-3D and Otze are therefore particularly suited for marine setups, but now cover a wide range of methods and system configurations, whether in time or frequency domain. 

    In RLM-3D, Controlled Source Audio-Magnetotellurics (CSAMT) — common in the mining industry — is modeled by considering the full geometric setup, including the transmitter dipole, therefore allowing inclusion of near-field and transition zone data, as opposed to the usual limitation to using far field zone data only. 

    Potential field inversion modeling

    Multiphysics data analysis in joint workflows can be integrated with gravity, magnetics and gradiometry for 3D potential field inversion modeling of airborne, marine or land potential field data, including full tensor gradiometry, with: 

    • Depth-weighted regularization schemes to encourage modeling of deeper structures
    • Density modeling of marine gravity data integrated in the velocity model building workflow in seismic processing
    • Functionality of magnetic vector inversions (MVI), powerful over remanently magnetized mineral deposits

    Seismic tomography

    Fully integrated in the multiphysics inversion engine RLM-3D, our tomographic modeling allows for joint inversions with other disciplines and inclusion of arbitrary a priori information. Input data to the inversion are either traveltimes or double difference (DD) times. We deliver expertise on: 

    • Micro-seismic earthquake monitoring 
    • Traveltime tomography computed using an eikonal solver for 3D heterogeneous velocity models
    • 3D distributions of Vp, Vs and hypocenter event location updates, as well as receiver-specific delay terms and event-specific source time shifts
    • 4D inversions, for example in geothermal monitoring: simultaneous inversion of traveltime data from different time epochs for emerging velocity changes