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

A Modern Approach to Seismic Interpretation

"A Modern Approach to Seismic Interpretation" is a 3 or 4 day workshop-style course using the Petrel Suite. Geoscientists are guided through interpretation of a seismic data set using the 3D Window as the primary interpretation canvas. The 3D Window affords a number of efficiencies over the Interpretation Window that have significant impact on both speed of delivery and quality of the final interpretation.

The course offers practical guidance to interpreters on strategies for fault and horizon interpretation and the maturation of that interpretation network into robust structural frameworks. The techniques provided maximise the power of the 3D capabilities in Petrel and focus on workflow efficiency and dynamic visualisation of the data set. It also covers workstation and software optimisation, volume and surface attribute generation, volume rendering and integration of well data.

The course targets organisations and individuals that are migrating to Petrel from Interpretation Window-focused software as well as staff that may be sheltering in a serial 2D approach to 3D interpretation. It can also be adapted to accommodate geoscientists without an interpretation background (graduates, geomodellers, processing geophysicists). The training simulates (in an accelerated way) real project work and provides a “why (and this is how)” solution instead of a “this button does that” approach.

Day 1

Efficient and Robust Seismic interpretation

  • Preamble
  • Workstation Setup
  • System & Project Setup
  • Data Preparation
  • A discussion on Aims and Output
  • Fault Interpretation

The hows and whys of Project and System setup are discussed followed by a pragmatic discussion on data preparation and a brief review of aims and outputs. Fault interpretation is introduced through a series of “best practices” and then participants are unleashed on the data. Further skills are rolled out in the course of the afternoon.          

Day 2

Fault/Horizon Interpretation in Practice

  • Fault Interpretation
  • Horizon Interpretation
  • Structural Modelling

A full day of interpreting with hands on coaching by the instructor. Focus on building robust fault networks using the workflows introduced on Day 1. Introduction to guiding principals of auditing oneself and others using the 3D Window.

Horizon interpretation is introduced along similar lines. Fundamentals are discussed, and participants are put to work implementing efficient workflows. Reinforcement of self-auditing.           

Structural Modelling of the interpretation network is introduced. The theory behind the process and the reasons for its utilization in the interpretation cycle are discussed. Faults are used to create a Structural Framework.    

Day 3

Beyond Interpretation

  • Structural Modelling
  • Post Modelling – Surface Consolidation
  • Horizon Based Analysis
  • 2D in 3D

Fault framework QC and error resolution is followed by (VBM) horizon modelling and further review of error resolution. Final Structural Model created and then used to create surfaces.

Surfaces are used for horizon based analysis using the Volume Rendering tools in Petrel. This includes a review of attribute generation functionality and selection.

The new interpretation paradigms are then applied to a 2D dataset along with some additional workflows specific to these data.                

Day 4

The 4 day course is aimed at geoscientists that are either new to Petrel or where seismic interpretation is not part of their daily workload. It includes a significant discussion (and exercises) of the integration of well data into the interpretation cycle and sets a less rigorous pace for the interpretation phase allowing participants time to achieve a level of comfort with the interface and level of confidence with the tools and skills presented.

Learning activity mix

Subsurface professionals that are new to Petrel (migrating from “interpretation window” focused software) or existing user looking for efficient 3D window-based workflows.

Preamble – Efficient and Robust Seismic Interpretation

Workstation Setup, System & Project Setup, Data Preparation (Loading, Review and Conditioning),  A discussion on Aims and Outputs

Fault Interpretation – Create and populate the faults for the project. Explore a number of techniques for interpreting faults that deliver robust results

Horizon Interpretation – Discussion on autotracking, hotkey usage. Strategies for bad data areas

Structural Modelling – See how it works – the steps required and canvas management to make that efficient. Parameterisation. Editing and iteration. Fault validation. Horizon QC. Horizon modelling. Error investigation. Model finlalisation.

Post Structural Modelling – Surface Consolidation. Exporting from the Model. Using the initial interpretation and the Model polygons to make surfaces. Modelling further surfaces.

Horizon-based Analysis – probe creation and manipulation. Attribute extraction, spectral decomposition

2D in 3D – Applying the new paradigms to 2D data.

Familiarity with some form of CAEX.

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