Gravity and Magnetics: Technology made for team-based exploration

Exploration software has adapted to meet the needs of today's multidisciplinary and team-based exploration. As teams of structural geologists, petroleum technicians, seismologists and geophysicists work together to develop
Oil and Gas exploration projects, maps and results need to be quickly and easily shared across different software platforms.

With the gridding, filtering, modeling, depth-to-basement, and other capabilities of Geosoft’s Oasis montaj and GM-SYS software, explorers can optimize their analysis and visualization of gravity and magnetic data and integrate this information with interpretations derived from geologic, seismic and other data.

As a result, they can maximize the accuracy of their final interpretations and optimize the more expensive aspects of their exploration program such as seismic reflection or drilling.

Explorers can easily work with all their data formats, 3D surfaces, 3D grids, and 3D models, within Geosoft’s integrated exploration platform. They can generate advanced gravity and magnetic interpretations and easily share their Geosoft maps and interpretations across their Seismic or ArcGIS systems, so that other team members can work with them and continue to add value. Geosoft recently added ARC connectivity to its already strong data support capabilities.

Integrated Solution for Gravity and Magnetics

Geosoft’s Oasis montaj earth mapping platform combined with its gravity and magnetic modeling software, GMSYS, creates an integrated visualization and modeling solution for Oil and Gas explorers identifying and characterizing potential reservoirs.

The Oasis montaj platform provides an optimal environment for integrating, viewing and comparing large-volume geophysical, geochemical and geological data. It accelerates data analysis to support effective interpretation and target selection in daily decision making.
Geosoft’s advanced projection engine provides on-the-fly projection, and can handle over 2000 datums and projections.

Geosoft’s GM-SYS profile modeling and GMSYS-3D modeling extensions, add powerful gravity and magnetics visualization and specialized data modeling, compilation and interpretation functionality to the Oasis montaj environment.

GM-SYS Profile Modeling is an interactive gravity and magnetic profile modeling program that enables users to create a geologic model of the subsurface and compare the model’s gravity and magnetic response to observed gravity and magnetic measurements.

GMSYS-3D is an interactive 3D gravity and magnetic modeling software program that enables users to design three dimensional models to accurately depict subsurface structures, and calculate their
gravity and magnetic responses.

Seismic Data Integration

A built in SEG-Y Reader enables the integration of seismic data in SEG-Y format with Oasis montaj geospatial data and GM-SYS Profile and GMSYS-3D gravity and magnetic models. The SEG-Y Reader converts 2D SEG-Y data into bitmaps, Oasis montaj grids or databases and 3D SEG-Y data into 3D Grids or databases. Explorers can insert the bitmaps and 2D or 3D Grids into GM-SYS Profile Modeling, GMSYS-3D Modeling, and Oasis montaj. They can view and override nonstandard fields. In addition, the SEG-Y Reader can accept trace coordinates from either a trace header or a separate navigation file. When creating a seismic bitmap or grid, the 2D SEG-Y data may be automatically projected on to a vertical plane (e.g. GM-SYS cross section).

 

oint Inversion

Joint Inversion

Explorers can better understand their subsurface geology with Full Tensor Gravity Gradient Joint Inversion. They can jointly use any combination of the gravity gradient ten­sor components plus magnetic and normal gravity to constrain the inversion. Explorers can specify weighting factors for each of the eight possible data constraints. The RMS mis-fit is displayed at each step so that users can monitor the progress of the inversion and stop it at any time.

 

Time to Depth

Time to Depth

Explorers can load seismic time sec­tions, build models in time using all of the GMSYS tools, assign velocities, and convert the time model to a depth model. The cursor tracks between the time and depth windows so that changes made in one window are im­mediately reflected in the other window.

 

 

 

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