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3D Seismic Interpretation Workshop

Structural model construction & trap analysis

METH/SEISINTERP
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Who should attend?

  • This course provides a practical understanding of 3-D seismic structural interpretation in order to identify prospect locations.
Audience :
  • E&P professionals with previous experience in seismic interpretation.

Level : Proficiency

Course Content

  • WEEK 1

      • Team work on 3D case studies (extensional context).

  • Structural interpretation - Prospect geometry identification*

      • Workshop presentation and objectives (0.5 day)
      • Survey introduction - Geophysical context.
      • Geology and petroleum system overview.
      • Prospect objectives.
      • Seismic data analysis and QC (0.5 day)
      • Parameters for seismic displays: vertical sections, time slices, composite sections, 3D view.
      • Seismic data analysis: noises, multiples, footprints, frequency content, smoothing.
      • Seismic data preparation: smoothing/filtering for structural interpretation vs reservoir interpretation.
      • Well-to-seismic tying and horizons identification (1 day)
      • Well data calibration to identify main geological markers and main reservoir layers.
      • Synthetic seismogram calculation.
      • Seismic data picking and mapping - Potential traps definition (2.5 days)
      • Structural interpretation (in time) of mains horizons key, horizons and faults picking (time picking: manual, guided, automatic, grid, and 3D picking), and correlation.
      • Picking results QC and estimation of uncertainties.
      • Volume and surface attributes calculation and analysis.
      • Surfaces generation to produce a time model.
      • Mapping.
      • Velocity model construction and time-to-depth conversion (0.5 day)
      • Interfaces selection for modeling.
      • Seismic velocities of intervals: editing and smoothing, control and correction with reference wells.
      • Velocity model construction via layer stripping.
      • Time-to-depth conversion.

  • WEEK 2

  • Introduction to seismic reservoir analysis*

      • Potential reservoirs analysis (3.5 days)
      • Reservoir picking and modeling.
      • Surface attributes calculation and analysis.
      • Interval attributes calculation and analysis.
      • Structural prospects identification and evaluation (1.5 days)
      • Entrapment, reservoir extension.
      • Time vs. depth structures comparison.
      • Uncertainties assessment.
      • Recommendations.

  • Summary, synthesis & wrap-up

      • * With courtesy of Schlumberger.

Learning Objectives

  • Upon completion of the course, participants will be able to:
  • get familiar with a 3D seismic structural interpretation workflow,
  • perform a seismic structural interpretation: seismic data QC, well-to-seismic tying, horizons and faults picking, structural model construction and trap identification,
  • use a velocity field to perform a time-to-depth conversion,
  • identify structural prospects.

Ways & Means

  • Interactive presentations, exercises and document analysis.
  • 80% of training duration is dedicated to workshop on PC, using a seismic interpretation software tool from the industry.