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Oil & Gas Training
and Competency Development
Competency Management system SLB NEXT

Earth Model Building (EMB) with Omega and Petrel

This five-day hands-on course introduces the geoscientist to the functionality of the WesternGeco Petrel plug-ins that are part of the Omega Earth Model Building Bundle. This is primarily a software course where students will use practical exercises to explore the earth model building workflow.

Day 1

Petrel Project Set-up and Seismic Visualization

  • Loading and organizing various types of data used in the EMB suite
  • Visualization of seismic data, models and horizons with Petrel
  • Use of EMB tools to optimize displays

At the end of this session the student will be able to load horizons, properties and Volcan models into Petrel. They will be able to convert older versions of Volcan models to the current Petrel version. They will be able to set up and maneuver in Petrel 3D, 2D and Interpretation Windows and use the quick slices, slice groups and mixer tools in SVM.                

Day 2

Structural Modeling, Dip Estimation and Property Population

  • Building structural models using provided horizons for use in the velocity modeling building process. Including salt model building
  • Estimating structural dip and azimuth from a provided seismic volume for use in the velocity modeling process
  • Populating previously built structural models with properties (velocity, delta, epsilon, dip, and azimuth) that can be used in velocity modeling

At the end of this session the student will be able to build a structural model, export surfaces and zones and edit the model. They will be able to use the dip estimation tool in SVM to estimate and QC the dip field. They will be able to populate and QC a property model and export a Volcan model.                    

Day 3

Property Editing Toolkit, Map Migration and Pre-stack Seismic Interpretation (PSI)

  • Editing various properties in a model including arithmetic operations, interpolation, extrapolation, and merging
  • Map migrating horizons from depth to depth, depth to time or time to depth. Optimizing the map migration results by using the smoothing and decimation options within the Map Migration tool
  • Loading, visualizing, and manipulating pre-stack gathers with the functionality present with the PSI plug-in

At the end of this session the student will be able to use the Property Editing Toolkit functions: edit, merge property, merge zone validation and statistics. They will be able to use the Map Migration toolkit to migrate a set of horizons from depth to depth using an update model. They will be able to use the PSI plug-in to load, select and display pre-stack gathers, pick and apply mutes, stack a dataset, display angle gather and apply a gain. They will be able to load and visualize VIPs.              

Day 4

CIP Picking, Tomography QC, RMO QC and CIP Pick Editing

  • Using the interactive CIP pick functionality to optimally pick residual moveout present in gathers
  • Interactively QC and choose an optimum CIP tomography solution from options produced by ZTOMO SFM within Omega
  • Interactively analyzing residual moveout present in a velocity model and editing CIP picks by using a 1D filter

At the end of the session the student will be able to load and view pre-stack DIO data in Petrel, display pre-stack gathers in the pre-stack window and run localized CIP picking. They will be able to load tomography logs, use the Tomo QC Tool, edit a solution and update the model with the tomography solution. Additionally they will be able to load data for RMO QC and edit CIP picks with a 1D filter.                

Day 5

Working with Wells and Ray Tracing and Illumination Studies

  • Loading and visualizing well information and the interaction of well information with EMB functionality
  • Interactively producing ray tracing experiments and illumination maps for a particular horizon      

At the end of the session the student will be able to load and display wells in 3D and 2D windows, display wells in the well section fence and run a mis-tie analysis. They will be able to extract properties with Well Property Extract and use wells to populate a Volcan model.                

Learning activity mix

This class is suitable for geophysicists with a good knowledge of the Omega software package wanting to gain a practical overview of the earth model building workflow.

  • Petrel project set-up and seismic visualization
  • Structural modeling, dip estimation and property population
  • Property Editing Toolkit, Map Migration plug-in, Pre-stack Interpretation plug-in (PSI)
  • CIP picking, Tomography QC, RMO QC and CIP pick editing
  • Working with wells, introduction to Ray Tracing and Illumination plug-in (RTI)

A knowledge and understanding of seismic theory, seismic and well data usage and limits, basic geology and rock physics, as well as the concepts of the depth imaging workflow. Familiarity with basic Petrel functionality.

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