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2D Seismic Interpretation

Competency Statement:

Evaluate seismic sections to interpret chronostratigraphic units and structural elements.  Use the techniques of seismic interpretation to pick horizons and faults over an interval of interest. Tie existing well information to the seismic section using a synthetic seismogram. Combine the seismic interpretation and well data to create a seismic time map.

Learning Objective:

  • Tie well information to the seismic section using the synthetic seismogram or check shot survey.
  • Identify major reflections in the seismic data set.
  • Enumerate criteria for picking faults based on the regional structural style.
  • Describe conformable and unconformable seismic reflection geometry.
  • Describe the steps to complete a seismic time map.

Assignment Instruction:

Your company is planning to bid on an offshore area. The only information available is 160 Km of 2D seismic and two wells with logs (see below).  As a member of the exploration team, you will use this information to evaluate the hydrocarbon potential of the area. You will propose to your management whether or not to bid by providing the seismic interpretation of the area. By mapping structural and stratigraphic features with exploration potential, you will also propose further seismic surveys and/or reprocessing of existing seismic lines as needed.

2D seismic lines and wells distribution

 2D seismic lines and wells distribution

Data Provided:

  • Six 2D seismic lines
  • Well A Info (TD=11940 ft), Sonic log, gamma ray log, density log, check shot survey
  • Well B Info (TD=12585 ft)
  • Map with seismic lines and wells location

Do the assignment sequentially as all answers might be used as input for subsequent questions. You should take notes of all your answers.