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Seismic Data Processing

Competency Statement:

Design the seismic processing sequence by selecting the appropriate processing methods. Perform the data processing and quality control, and work with the interpreter to make sure that the outcome truly reflects the geological characteristics of the area.

Learning Objective:

  • Describe the basic seismic processing sequence from pre-processing and deconvolution through stacking and velocity analysis, to migration and post-processes.
  • Understand the application of different types of deconvolution, velocity analyses, and migration techniques.
  • Review processing steps in the context of the objectives of the seismic interpretation.

Assignment Instruction:

Reflection seismic methods, as part of the seismic data processing process, are the tools of choice for hydrocarbon exploration because they can give an image of the subsurface and its structural and sometimes, stratigraphic features. Seismic data processing is the cornerstone for this image generation from the raw data recorded at seismic surveys. Different processes are applied to improve the quality of the image, not only for the purpose of interpretation but also for extracting acoustic and elastic information from seismic sections or volumes.

This assignment introduces you to the basic theoretical concepts and its applications at different seismic processing stages.

During this exercise you will process a 3D onshore seismic survey.

  • The survey area is about 500Km2 with low structural complexity.
  • One well is drilled in the survey.
  • The target is around 3 seconds two-way travel time.
  • The seismic source used was dynamite.
  • From previous 2D seismic information, the main faulting system is extensional with some half-graben interpreted.

Your task is to go through the QC (Quality Control) of a processing sequence applied to seismic data.