For inversion modeling, we use ZONDST2D, a two-dimensional processing and interpretation software of seismic prospecting data.
With inversion modeling we determine the velocity structure at a known time path of the refracted waves from source to receiver. Where the calculations are based on special ray tracing algorithm (Shortest path’s method) of graph theory. Shortest path methods aims to find the minimal traveltime of the refracted wave from one point to all other points in a network of nodes and edges.
The main advantages of the shortest path method are its simplicity, capacity for simultaneous calculation of the first arrival times and the associated ray paths of each mode without missing any receiver in a complex geological structure.
provides quick results on determining geological structures, weakness zones.
The ray path
presents the reliability of the model. The denser the coverage is, the more reliable the data is.
The layered model
delivers a quick overview of the possible layer boundaires.
The transparent model
enables us to combine the aformentioned results to get a full overview.
Quality ensurance model
The geophysical data interpretation is carried out in two waves in order in order to ensure quality and reliability in our results presented.
The manual interpretation is based on the ABC method that is fed by the observed geophysical and geological data. This method gives a layered model of the geophysical features of the Earth's sub-surface and present the layer boundaries and bedrock curve along the seismic profiles.
Parallel to the manual interpretation, we also carry out a software based interpretation of the geophysical data that is presented in an inversion model. The inversion model gives a good visualisation of the geological structures that is calculated by using the Shortest Path method based on Graph theory.
Concluding the interpretation process, we create a combined model by aligning and comparing the two methods against each other, therefore, ensuring quality and reliability in our results.
All rights reserved Geomap Norge AS © 2022