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

Practical Seismic Attributes with Petrel

In this course the students learn the theory and practical workflows needed for effectively using post stack seismic attributes in seismic interpretation.

The course content covers the most common seismic attributes, discusses the theory, attribute management and visualization. It delivers concepts and workflows for the interpretation of stratigraphy, structure, direct hydrocarbon indicators and discusses clastic, carbonate and reservoir features. 

The students learn these concepts and workflows while guided by well-structured exercises done in Petrel and based on a variety of seismic datasets.

This course will outline the practical aspects of generating and understanding Seismic Attribute responses and relating these from the mathematical geophysical generation to practical geological understanding and application.

Focus will be placed on outlining the use of seismic attributes in specific geological environments and identification of specific geological features.

The Learning Objectives for the course are

  • Teach the theory of seismic attributes
  • Teach the practice of seismic attributes using example sessions with Petrel software
  • Prepare you to use seismic attributes in your work
Day 1
  • Introduction into seismic wave theory
  • Short History and Theory of Seismic Attributes
  • Seismic Attributes in Petrel
  • Colors and Visualization of Attributes
  • Surface Attributes in Petrel
  • Noise Reduction

During the first part of the day the students learn the basic theory and concepts of seismic attributes. Different visualization techniques are covered using Petrel including color and opacity management and co-rendering of different seismic attributes (RGB display mode).

During the second part of the day the students familiarize themselves with the handling and QC of 2D seismic attributes. Finally the students learn using seismic attributes for noise reduction

Day 2
  • Fault Interpretation (Edge Detection)
  • Fault Interpretation (Ant tracking)
  • Stratigraphic Interpretation
  • Channel Interpretation

On day two the students will be introduced to seismic attributes that are typically used for enhancing the fault visualization. The they will setup workflow for fault interpretation based on a combination of seismic attributes. The resultant cube highlights faults against the seismic background dramatically and is ready to be used for accurate manual or automated interpretation.

In the afternoon the students learn to use seismic attributes to highlight stratigraphic terminations and sequence boundaries and apply them on a data set to perform the seismic stratigraphic interpretation.

After this the students learn to apply seismic attributes and techniques to highlight channels and sedimentary features in clastic sedimentary environments and their interpretation using probes and geobodies.

     

Day 3
  • Textural attributes
  • Fracture indicators
  • Salt
  • Direct Hydrocarbon Indicators (DHI)
  • Seismic calculator
  • Carbonates
  • Group project

In the beginning the students learn how to use textural seismic attributes to separate sedimentary features based on their texture.

This is followed by a review of typical attributes commonly used for fracture detection.  Then the students will apply seismic attributes and techniques for highlighting salt features. 

The students will look into some seismic attributes commonly used for detecting direct hydrocarbon indicators.

Afterwards they will use the seismic calculator to highlight features in their seismic data, merge seismic volumes and create new seismic attributes.

Finally, the students review the seismic attributes and techniques used for Carbonate seismic interpretation with emphasis on karst features. 

Day 4
  • Colored inversion
  • Workshop for carbonate: analysis of a reef
  • Classification for identifying lithology changes

At first the students will become familiar with seismic inversion (colored inversion) that can be used for lithology identification.

This knowledge will be applied to a seismic data set in order to identify and analyze a reef.

Finally, the students will use the classification tool for identifying lithology changes and sand bodies based on changes of the seismic signature.

Day 5
  • Reservoir characterization
  • Reservoir property mapping based on 3D modelling
  • Workshop: fault interpretation and channel identification using seismic attributes

The last day starts with a discussion and application of the workflow for reservoir property mapping. The students will learn the strength and short-coming of surface-based property mapping.

Then the students  will learn to build a simple 3D model, interpolate reservoir properties coming from well logs and extract reservoir property maps  for each geological zone from this model.

Finally, in a workshop the students will do a structural interpretation and lithology identification of a small data set applying the knowledge they gained during the training course.

Learning activity mix

Seismic interpreters that need to use the full potential of their seismic datasets to resolve the seismic interpretation challenges.

  • Short History and Theory of Seismic Attributes
  • Using Seismic Attributes in Petrel
  • Fault Interpretation (Edge Detection & Enhancement)
  • Stratigraphic Interpretation
  • Channel Interpretation
  • Textural attributes
  • Fracture indicators
  • Carbonates (including workshop)
  • Salt
  • Direct Hydrocarbon Indicators (DHI)
  • Colored Inversion
  • Classification for lithology change
  • Reservoir Characterization
  • Reservoir Property Mapping based on 3D Modeling
  • Workshop : fault and channel identification using seismic attributes.

Petrel Fundamentals training course is required.

Knowledge of Petrel basic and seismic interpretation functionality, and of seismic interpretation workflows.

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