3D Land Processing

Audience

New hires with no experience in seismic data processing, experienced geophysicists with little or no 3D land data processing.

Content

A wide range of subjects spanning a land processing sequence are covered. These include; reformatting of the SEG-D field data, QC of SPS field data using the interactive application Onset, trace header update with the geometry information from the SPS and both 3D Linear and random noise attenuation.

Refraction static corrections and repositioning with the interactive refraction analysis tool are investigated. Data sorting, stacking and velocity analysis are probed. 3D surface consistency is explored for deconvolution  computation and application of 3D amplitude correction scalars and residual statics. This is followed by data regularization are finally in a Kirchoff pre-stack time migration, stacking and post processing.

At each step in this course relevant Quality Controls using interactive applications are fully explained.

Learning Objectives

  • Acquire the ability to work on 3D land processing project
  • QC 3D data confidently and effectively

Duration

15-day

Number of Participants

4 - 12

Prerequisites

Basic knowledge of seismic processing principles, and elementary experience with the seismic processing package

Software Used

geovation

Course Format

Classroom, exercise, presentations

Audience

The course is designed for those with little or no 3D land processing knowledge and requiring the skills to carry out a 3D sequence.

Content

This program uses the geovation software processing package to process a 3D land seismic dataset through the wide range of subjects spanning a basic time processing sequence. It includes parameter testing and quality control in order to develop the processing sequence. Participants reformat the SEG-D data; verify the SPS field data using the interactive tools and apply the geometry. Focusing on the near-surface and the impact it has on the data quality statics are determined. Noise is reviewed and surface consistent techniques, shot, receiver and cross-spread domains noise attenuation or 3D linear and random noise is applied as appropriate. Velocities and mutes are derived using suitable applications. Participants learn to manipulate the data between domains and come to understand the domain appropriate for each process. After multiple removal and regularization a Kirchhoff pre-stack migration is performed followed by post migration and stack processing.
The main topics covered are:

• Initialization of the production flow in Geodesk, profile tables building
• Reformat seismic data to internal format; quality control (QC) of the raw shots and attributes
• Geometry update and quality control (QC)
• Statics, computation of elevation statics, computation of refraction statics using tomography
• Denoise; de-spiking, frequency dependent noise removal, ground roll removal, random noise attenuation, parameter testing and QC
• Surface consistent amplitude correction and deconvolution
• Velocity Analysis, residual statics computation
• Demultiple techniques and tauq radon demultiple
• Bin centering and fold harmonization
• Pre-stack migration
• Post migration automatic dense residual move-out, muting and stack
• Acquisition foot print removal, Residual coherent and random noise removal, TVF and spectral balancing

Learning Objectives

• Complete a basic 3D land sequence from reformatting, through migration and post processing
• Be aware of the method to design and implement a testing plan
• Understand the different processing domains
• Be confident using the interactive tools
• Understand the steps of managing a processing workflow, job building, submitting, quality control and data management


Duration

15-day

Number of Participants

12

Prerequisites

Participants should have a geophysical background and be equipped with a basic proficiency in using the software and interactive applications

Software Used

Geovation

Course Format

Classroom, presentations, exercises,

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Our proprietary courses are fully customizable and can be offered at a time and location convenient to you. Please request a course for more information.