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E-131 - Seismic Interpretation Workshop

10 days GEP/SISINTERP
Level
Proficiency
Audience
  • E&P professionals with previous experience in seismic interpretation
Purpose
  • To provide a practical understanding of 3D-seismic structural interpretation and modeling
Learning Objectives
  • To grasp the workflow of a 3D seismic structural interpretation
  • To perform a seismic structural interpretation: seismic data QC, well tying, horizons and faults picking, building structural model and traps identification
  • To build a velocity field suitable for time to depth conversion
Prerequisite
  • It is highly recommended to have fundamental knowledges in seismic wave propagation, acquisition and processing, as well as in structural geology
Ways and means
  • Interactive presentations, exercises and document analysis
  • 90% of the training duration is devoted to workshop on PC, using Seismic Interpretation Software

Introduction
  • Team work on extensional 3D case study
Structural interpretation of prospects geometry
  • Surveys presentation of the extensional North Sea 3D seismic Block and workshop objectives
  • Geology and petroleum system overview - Geophysical context
  • Prospect objectives
  • Data preparation and QC
  • Seismic data preparation and analysis
  • Seismic display and overview choosing parameters for displays, vertical sections or time slices, intersections, random sections, display combinations
  • Seismic data analysis --> how to evidence and identify noise and multiples, emphasize areas of frequency or energy modification, areas of good S/N ratio
  • Seismic data preparation --> remove noise and acquisition foot prints (filtering)
  • Well-to-seismic tying and horizons identification
  • Well logs display (maps and plates) and QC
  • Well data editing and calibration: Well velocity calculation and layer velocity contrasts identification - Main reservoir layers identification
  • Synthetic seismogram calculation (impedance, Reflectivity, wavelet extraction and SS calculation)
  • Defining traps
  • Well to seismic tying and seismic key horizons identification
  • Key horizons Time structural interpretation (interfaces between velocity contrast layers + top and base of reservoir) --> fault and horizon picking, correlation and mapping
  • QC of picking and uncertainties assessment
  • Velocity model building (layer stripping approach) and Time-to-depth conversion
  • Selection of layers for depth model building (velocity contrasts)
  • Seismic Interval velocity VI calculation for selected layers --> VI editing and smoothing, Seismic VI to well VI correction
  • Layer stripping velocity model building: Depth migration of seismic data with flooded velocity of layer 1 - Picking of base of layer 1 and velocity model update - Iterative update for next layers --> Final velocity model
  • Time to depth final conversion --> depth seismic bloc
  • Structural prospect analysis
  • Entrapment, reservoir extension
  • Comparison between time and depth structures
  • Uncertainties assessment
  • Recommendations
Synthesis and conclusions
  • Wrap-up session
2016 course calendar
Language Dates Location Tuition Register
Nov 21 - Dec 02 Rueil €6,450 Online By email