Introduction to Data Analysis: Concepts and Examples
By: Robert Godfrey
Instructor
Dr Robert Godfrey
(Robert Godfrey Geophysics Inc., Canada)
Duration
16–19 November 2021:
4:00PM-8:00PM CET
4 hours/day
Disciplines
Geophysics – Seismic Processing
Course Format
The EAGE Interactive Online Short Courses bring carefully selected courses of experienced instructors from industry and academia online to give participants the possibility to follow the latest education in geoscience and engineering remotely. The courses are designed to be easily digested over the course of two or three days. Participants will have the possibility to interact live with the instructor and ask questions.
Education Packages
To help you save on registration fees and better organize your learning path, we are offering Education Packages for all Interactive Online Short Courses and Online EETs. The packages are valid for a period of 12 months, choose between packages of 3, 5 and 10 credits.
Course Description
The course covers a range of advanced data analysis topics including novel signal processing techniques, pre-stack depth migration, reservoir characterization, time lapse analysis and the road ahead.
The free on-line books by Jon F. Claerbout, material from SEG Wiki and papers published in Geophysics, The Leading Edge and SEG Expanded Abstracts are used to provide technical background for the course topics.
Eight modules are presented over four 4-hour days (virtual course). Each module lasts approximately 2 hours including break & exercises and contains both conceptual material and examples. The entire course was originally planned to be presented over two 8-hour days in classroom format.
Course Objectives
1) Suggest acquisition strategies to
(a) broaden spectrum (both low and high)
(b) reduce acquisition cost where appropriate
(c) provide superior illumination and
(d) improve conventional wave imaging using shear waves to highlight faults/fractures, low compressional wave impedance contrasts and gas-effected areas.
2) Advise and recommend key steps in data processing workflows.
3) Choose appropriate pre-stack depth migration algorithms to image expected dip range (e.g. Kirchhoff, Beam, RTM).
4) Advise on velocity-depth model building workflows (e.g. Grid Tomography or FWI).
5) Decide on the applicability of applying AVO and what elastic attributes to estimate.
6) Define optimal petrophysical parameters to be estimated using elastic attributes and an associated workflow including probability analysis if appropriate.
Course Outline
- L1 vs L2
- Statics as a general inverse problem
- Constant Q
- Burg Maximum Entropy
- Filtering on a Helix
- Rich Azimuth Shooting
- Simultaneous Acquisition
- Broad-Band Seismic
- Low Frequency Sources
- CSEM
- Multi-Component
- DAS
- Virtual Sources
3) Multiple Attenuation
- Historical Techniques
- SRME
- Auto-Focussing
- Intrabed Multiple Attenuation
4) Pre-Stack Depth Migration
- Kirchhoff, RTM, Beam
- Grid tomography
- Full waveform inversion
- Rock Physics & Geology Based Techniques
5) AVO & Rock Physics
- Classes 1,2, 3 and 4
- Normal Incidence * Poisson Ratio Coefficient
- Fluid Factor
- Rock Physics Templates
- Anisotropy
6) Quantitative Interpretation
- Estimating Petrophysical Parameters
- Case Histories
- Bayesian Inversion
- Fault and Fracture
- Characterization
Day 4
7) Time-Lapse Seismic
- Repeatability
- Pressure and Saturation Effects
- Case Histories
- Including Geomechnical Effects
- Heavy Oil Monitoring
8) The Road Ahead
- Hydraulic Fracture Monitoring
- Geomechanics and Reservoir Simulators
- Machine Learning
- Permanent Reservoir Monitoring
- Digital Rock Physics
- High-End Borehole Geophysics
Participants' Profile
The intended audiences for this course are geoscientists-in-training, seismic data processors, petroleum geologists, seismic interpreters and operational geophysicists who are seeking to expand their knowledge base on modern concepts in geophysical data analysis.
Prerequisites
Participants are expected to have a basic knowledge of the fundamentals of data processing and some experience in interpretation.
About the Instructor
Dr Robert Godfrey
Robert J. Godfrey received a Bachelor of Applied Science degree in geological engineering from UBC in 1975 followed by a Ph.D. in geophysics in 1979 from Stanford University. He was a member of the Stanford Exploration Project founded by Jon Claerbout.
Following his graduation, he began his career with Mobil Field Research Lab in Dallas and then joined Digicon in London for 8 years where he worked in research and development. This was followed by a 25-year stint with Schlumberger where he worked in Calgary, Austin, London and Cairo, primarily in the fields of reservoir characterization and later in seismic monitoring. In 2015, he established Robert Godfrey Geophysics Inc., and is currently working as a geophysical consultant in seismic technology, geophysical education, and undertakes short-term assignments. He is a member emeritus of the SEG.