Essentials of Rock Physics for Seismic Amplitude Interpretation - 3 Day Course - Training Course by Ikon Science

Essentials of Rock Physics for Seismic Amplitude Interpretation - 3 Day Course

Available as a public course
Available as a private in-house course

This highly acclaimed and constantly evolving course (now in its 11th year), is a must for all geoscientists wanting to understand rock physics principles, their application to amplitude interpretation (including AVO reflectivity and elastic inversion products) and how they can be applied to reduce drilling risk.

More than 90 courses have been given in the last decade. In-house presentations have been given to multi-nationals including Shell, ENI and British Gas, while representatives from more than 70 companies have attended public courses in the USA, UK, Holland, Italy, Norway, Mexico, Trinidad, India, South Africa and Australasia.

Dr Rob Simm has granted Ikon Science the rights to deliver this course by our approved tutors; Dr Mark Sams and Dr Michel Kemper. More than 165 courses have been given in the last decade.

Who should attend?
The course is designed for all geoscientists who wish to understand the principles of interpreting seismic data using rock physics models and gain awareness of how this may impact the perception of risk in exploration and production drilling. Attendees will receive a fully documented manual with text discussion, including all illustrations shown in the course. The course is a combination of lectures and practical exercises - these exercises use our RokDoc software, but no previous experience of the package is required.



Full Course Outline

Introduction
The potential of seismic amplitude interpretation, for hydrocarbon detection.  Seismic amplitude and risk.

 Fundamentals
Seismic basics, approach to seismic modelling, elastic parameters, modelling reflectivity, relating seismic data to models

Rock Properties and AVO
AVO response description, rock property controls on AVO

Rock Physics, AVO and Seismic Interpretation
Seismic interpretation and AVO, trend curves and the stratigraphic context of AVO, practical example

Characteristics of Seismic Wavelets
Seismic bandwidth, zero phase and minimum phase, wavelet shape, zero phasing, enhancing frequency content

Resolution
Temporal resolution, net pay estimation and tuned responses, resolution – Sections vs. Maps

Well Ties
The well tie process, log calibration, the importance of wavelet shape, problems with assuming phase and timing, a quantitative approach to well ties

Deriving Inputs for Seismic Models
Gassmann’s equation, relevant rock physics for rock characterisation and fluid substitution

Detailed Seismic Modelling

Seismic Trace Inversion
Seismic data and relative impedance, broadband inversion for absolute impedance, interpretation issues

 AVO Analysis
2 term conventional AVO and the use of data projections(near far/ Intercept gradient). Data requirements for successful AVO analysis, seismic processing issues. Elastic inversion (EI, EEI), model based elastic inversions (2 and 3 term) for angle independent elastic parameters.

Issues in Applying Rock Physics in Prospect Evaluation

Exercises

  1.  AVO scenarios
  2. Net pay prediction
  3. Which tie is best?
  4. Wavelets – where do you pick?
  5. Fluid substitution and AVA modelling
  6. Offset to angle
  7. Would you drill this bright spot?
  8. What is the likely interpretation of this amplitude anomaly?
  9. The sensitivity of AI inversion to the low frequency component
  10. Defining an AVO anomaly and the issues in Calibration

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