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3D Seismic Interpretation Workshop

Structural Model Construction & Trap Analysis

SEIS3D-EN-P
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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.
Public :
  • E&P professionals with previous experience in seismic interpretation.

Level : Proficiency

Course Content

  • WHAT IS SEISMIC INTERPRETATION?

  • PETROLEUM GEOLOGY - STRUCTURAL CONTEXT

  • STRUCTURAL & STRATIGRAPHIC INTERPRETATION PRINCIPLES

  • SEISMIC WAVE PROPAGATION: ACOUSTIC IMPEDANCE, REFLECTION COEFFICIENTS

  • SEISMIC PROCESSING & THE EFFECTS ON INTERPRETATION

  • WAVELETS, POLARITY & PHASE - SEISMIC SPECTRUM - VERTICAL & LATERAL RESOLUTION

  • TIME-TO-DEPTH CONVERSION LAWS AT WELLS: CKS, VSP…

  • SYNTHETIC SEISMIC & WELL-TYING PROCESS

  • TIME TO DEPTH CONVERSION BASICS

  • WORKSHOP - CASE STUDY (week 1)

    WORKSHOP PRESENTATION & OBJECTIVES

      • Survey introduction - Geophysical context.
      • Geology and petroleum system overview.
      • Prospect objectives.

  • SEISMIC DATA ANALYSIS & QC

      • 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 & HORIZONS IDENTIFICATION

      • Well data calibration to identify main geological markers and main reservoir layers.
      • Synthetic seismogram calculation.

  • SEISMIC DATA PICKING & MAPPING - POTENTIAL TRAPS DETECTION

      • 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.
  • WORKSHOP - CASE STUDY (week 2)

    VELOCITY MODEL CONSTRUCTION & TIME-TO-DEPTH CONVERSION

      • 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.

  • POTENTIAL RESERVOIRS ANALYSIS

      • Reservoir picking and modeling.
      • Surface attributes calculation and analysis.
      • Interval attributes calculation and analysis.

  • STRUCTURAL PROSPECTS IDENTIFICATION & EVALUATION

      • Entrapment, reservoir extension.
      • Time vs. depth structures comparison.
      • Uncertainties assessment.
      • Recommendations.

  • SUMMARY, SYNTHESIS & WRAP-UP

Learning Objectives

  • Upon completion of the course, participants will be able to:
  • gather data, create project and perform a 3D seismic interpretation,
  • QC a seismic interpretation,
  • use a velocity field to perform a time-to-depth conversion,
  • identify and interpret structural prospects,
  • generate horizons and fault deliverables for a geomodel.

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.
  • Software used during workshops: with courtesy of Schlumberger.