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

Petrel Velocity Modeling

The purpose of this course is to introduce the student to velocity modeling, velocity handling and domain conversion functionality in Petrel.

It takes the user through the preparation stage of data used for velocity estimation and modeling. This includes quality control and edit of checkshot data used in sonic calibration and quality control of time surfaces and well tops used for defining velocity intervals.

Furthermore, the available velocity modeling approaches are discussed, including well velocity estimation, the nature and modeling of seismic velocities, surface based and 3D grid based seismic velocity modeling, as well as user defined velocity functions.
After the velocity modeling phase, domain conversion of various objects and how to model structural uncertainty is covered.

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For Petrel 2011/2012 classes

The purpose of this course is to introduce the student to velocity modeling, velocity handling and domain conversion functionality in Petrel.

You are guided through the preparation stage of data used for velocity estimation and modeling. This includes quality control and editing of checkshot data used in sonic calibration and quality control of time surfaces and well tops used for defining velocity intervals.

Furthermore, you get familiar with the available velocity modeling approaches, including well velocity estimation, the nature and modeling of seismic velocities, surface based and 3D grid based seismic velocity modeling, as well as user defined velocity functions.

After the velocity modeling phase, you learn how to execute domain conversion of various objects and how to model structural uncertainty.

Day 1Day 2Day 3
Learning activity mix

Development and exploration geologists, geophysicists, petroleum engineers, managers, reservoir engineers and technical personnel with prior experience in Petrel.

  • Quality control and editing of well data - checkshots, sonic logs, well tops
  • Checkshot calibration of sonic logs
  • Discussion of available velocity functions as well as different velocity modeling approaches
  • Velocity modeling using well data – checkshots and sonic logs
  • Velocity modeling using well tops
  • Quality control and editing of velocity modeling results
  • Depth error analysis and correction
  • Surface based seismic velocity modeling
  • 3D grid based seismic velocity modeling
  • Addressing anisotropy in seismic velocities
  • Geostatistical methods in modeling well velocities against seismic velocities
  • Quantifying residual depth error and creating a depth correction model to address the residuals
  • Creating user defined velocity functions
  • Domain conversion
  • Modeling of structural uncertainty

Petrel Geophysics course or similar Petrel experience.

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