Versions Compared

Version Old Version 5 New Version 6
Changes made by

Erlend Kvinnesland

Erlend Kvinnesland

Saved on

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.
Section
Column
width70%

Introduction

The tracking data is the foundation of all further GIM processing, such as generating surfaces, 3D bodies and GIM seismic. It including:

  • GIM seismic
    • Surfaces
    • 3D bodies
  • Facies attributes on surfaces

Note that the tracking settings are often very different for the different options mentioned above, and it is therefore essential to be aware of how to set the GIM tracking parameters to obtain optimal results.

Column
width30%



On this page:

Table of Contents

Tracking menu

Image Added

Tracking parameters

Parameters for surfaces
Generating surfaces is very much a balancing act. One wants the tracker to be generous and generate long lines giving us large surfaces. But at the same time we do not want the tracker to make mistakes. So we have to test to find the optimal settings.

Parameters for 3D bodies
To make 3D bodies, we want to omit the data which is interpretable. We invert the tracking so that all good data is removed, and we are left with the noisy bits of which we will make bodies. Often we use a medium tracking criteria (dT of 6ms) combined with a medium remove long setting (e.g. 6 traces).

Parameters for facies attribute
To make facies attribute, we only generate the tracking in one direction, either inline or crossline. One recommended method to get exiting results is to combine a strict tracking criteria, e.g. a dT of 3 ms, combined with a "remove short" set to 10 traces. This will make lots of breaks in the tracking as well as remove all parts of the data where GIM cannot generate interpretation lower than 10 traces.

Testing tracking parameters

...