Seismic time-depth conversion in practice

Learn how to perform geostatistical depth conversion and quantitative uncertainty analysis on depths, spill-points, traps, and reservoir volumes by using Isatis.neo depth conversion’s workflow.

Learning objectives

  • Understand and master the use of geostatistics for seismic time-to-depth conversion.
  • Explore many possible conversion scenarios.
  • Perform comprehensive risk analysis on depths and reservoir volumes to inform your decision-making.


Who should attend?

Geophysicists or geomodelers involved in seismic data interpretation and horizon mapping.

Course content

The course is a reminder of the key concepts of geostatistics for time-to-depth conversion and takes you through all the steps of Isatis.neo depth conversion’s workflow.

  • Understand the added-values and principles of geostatistical depth conversion
    Why using geostatistics for depth conversion?
    Illustration on a simple reservoir (with conformable horizons) and a layer-cake reservoir.
    What to do when well data is sparse and insufficient? Introduction to Bayesian kriging.
  • Prepare your data to depth conversion
    Achieve mis-ties correction
    Map the time uncertainty derived from a prior data processing (seismic filtering, mis-ties correction, merge of 2D and 3D datasets)
    Generate a fault model from fault sticks
  • Quantify potentially recoverable resources
    Define different conversion scenarios for sensitivity analysis of the resulting reservoir morphology to input data, computation methodologies, and parameters.
    Achieve depth conversion using depth modeling or velocity modeling and considering or not uncertainties associated with the seismic time and fault positions.
    Generate and analyze spill point locations
    Generate and analyze potential reservoir traps
    Generate the optimistic, mode, and pessimistic values of key reservoir volumes.


The course does not require prior knowledge of geostatistics. However, it is recommended to have a basic knowledge of statistics.

The course “Seismic Data Filtering and Depth Conversion with Geostatistics” covers the fundamental concepts of geostatistics applied to depth conversion and provides an ideal basis to this course.