Geophysical Modelling


GM-SYS

GM-SYS provides a complete solution for gravity and magnetic modelling, and the creation of integrated interpretations with seismic, well and structural data. As an extension of the Oasis montaj platform, it leverages Geosoft's core mapping and processing capabilities for multifaceted analysis of geophysics and geology; enabling interpretation teams to quickly and effectively collaborate, iterate and solve large data challenges.

 

GM-SYS Profile Modelling

The GM-SYS Profile Modelling™ enables to create a geologic model and test its accuracy by comparing the model’s gravity and magnetic response to observed measurements. The software provides integration of topographic, geologic, seismic, and well-log data. Other reference data such as depth-to-basement solutions can be displayed in an overlay on top of the geologic model.

Overview of GM-SYS Profile Modelling :

  • create a geologic model of the subsurface and test model accuracy by comparing the model's gravity and magnetic response to observed measurements
  • integrate seismic, well, and geology data with observed gravity and magnetic measurements
  • display hundreds of bodies, using any tabular prism that can be modelled and all parts of the model can be defined with unique properties
  • read and calculate magnetic gradients along a horizontal axis and along a vertical axis
  • model response data efficiently, with easy-to-use interface and feature-rich tool sets
  • add Intermediate and Advanced options provide greater flexibility of model geometry, speed the data model process, and further constrain modelling variable

 

Interactive Gravity Modelling

Interactive Gravity Modelling

 

Refine Models with Join Inversion

Refine Models with Join Inversion

 

 

GM-SYS 3D Modelling

GM-SYS 3D provides with the ability to build layered earth models using gravity and magnetic data. Fully integrated with Oasis montaj to model complex three dimensional subsurface structures at any scale, and integrate them with seismic data. GM-SYS 3D provides a user-friendly interface that makes it easy to build, visualize, edit, and add constraints to create complete earth models. Effective collaboration between gravity and magnetics and seismic interpretation teams is enabled by an efficient inversion workflow and rapid, iterative process for the best possible integrated models and sharing. (Note : requires MAGMAP Filtering™)

Overview of GM-SYS 3D Modelling :

  • create insightful 3D models by integrating gravity and magnetic, and seismic data
  • plot 3D displays of the model in one simple step, while retaining control over each element in the 3D visualisation
  • 3D visualisations update automatically during inversion and structure editing
  • add wells, seismic sections or volumes, or other vector or raster information to their 3D model visualisations
  • create a well-constrained model with the inversion tools
  • access the VALEM high performance computing (HPC) inversion service for recovering the base of salt in complex salt geometries


Visualise Models in 2D and 3D

Visualise Models in 2D and 3D

 

Integration of Seismic Data 

Integration of Seismic Data

 

 

VALEM for GM-SYS 3D (Voxel Assisted Layered Earth Modelling)

VALEM is an on-demand 3D cloud-based inversion service offered as an integral part of Geosoft’s well-established GM-SYS 3D workflow. VALEM harnesses the power of our most advanced 3D inversion technology deployed in a high performance computing (HPC) cloud. VALEM resolves the base of salt from gravity data bound by the constraints of seismic modelling, leveraging a unique hybrid approach that incorporates grids, geosurfaces, and 3D voxels for more accurate representation of salt geometry and sub-salt density distributions versus traditional modelling methods. This leads to improved velocity models and seismic interpretations. Geosoft’s high performance computing approach is critical for solving large problems quickly, allowing an interpretation team to iterate through different constraining scenarios and thus maximize the value of gravity data to obtain the best possible integrated models.

 

VOXI Earth Modelling

VOXI is a high performance, cloud-powered solution for rapid and responsive geophysical inversion modelling. VOXI's speed and usability makes it ideal for time-critical mineral prospecting and target delineation.

 

Generate 3D inversions and forward models

3D inversions & forward models

 Invert geophysical data and create quantitative 3D models of the earth to further understand the structure and processes beneath the surface. Calculate the response of a given physical property of a user defined 3D voxel model with VOXI forward modelling tools

 

Model gravity gradiometry data

Model gravity gradiometry data

Supports inversion and forward modelling of Gravity Gradiometry Data to yield a detailed 3D model of the rock density. Generic vertical gravity gradient data is supported as well as direct import of two common data types : Falcon AGG data and Bell Geoscience/ARKeX LM FTG data

 

Sharpen contacts with Iterative Reweighting Inversion Focusing

Iterative Reweighting Inversion

Iterative Reweighting Inversion Focusing (IRIF) takes a smooth earth model and uses it as a reweighting constraint when running a new inversion of the same data. It is used to model sharper contacts in the inversion result, providing more refined targets. IRIF is automated, saving processing time so that your results are available sooner

 

Model the 3D magnetization vector

3D magnetization vector

Traditional susceptibility inversions assume that subsurface magnetization is in the direction of Earth’s magnetic field. More often than not, this assumption is false and can yield inaccurate inversion results. Magnetization Vector Inversion (MVI) is a method that solves for both magnitude and direction. The results are not limited by erroneous assumptions and have been shown to coincide more closely with known geology than traditional susceptibility models

 

Model frequency domain EM data

Model frequency domain EM data

With VOXI can invert frequency domain horizontal coplanar configuration electromagnetic (EM) data to produce a voxel conductivity model. The conductivity model then integrated with gravity and magnetic inversions into a geophysical or geological interpretation in Oasis montaj. The FDEM inversion is based on 1D inversions interpolated along and between lines, suitable for airborne frequency domain systems such as Dighem or Resolve

 

Model IP and Resistivity data

 Model IP and Resistivity data

Inversion and forward modelling of IP and resistivity data to yield a detailed 3D model of conductivity and chargeability