N004 - The Essentials of Rock Physics and Seismic Amplitude Interpretation

Course Overview
This four day course focuses on the construction and application of first-order models in seismic amplitude interpretation and through this promotes the understanding of the essential aspects of rock physics that are relevant in interpreting all types of seismic displays (including reflectivity, impedance and AVO data).

Course content is evenly split between lectures that review the basics of how seismic relates to rock properties and PC based practicals utilizing real data. Through the use of commercially available PC based software the basics of rock physics interpretation of seismic data are understood. At the end of the course the student will not only be able to create first order reflectivity models and understand the basics behind the buzzwords (AVO, EI etc) but also to ask pertinent questions that relate to the use of seismic data in prospect risking.

Participants will learn to:
•	Employ simplifications to the Zoeppritz equations and understand why they are useful in describing variation 
        of amplitude with offset and how they are used in seismic modelling and interpretation.
•	Categorise AVO responses.
•	Appreciate how various rock property factors (such as lithology and fluid fill) affect the contrasts in 
        acoustic properties that give rise to seismic signatures.
•	Construct simple single-interface amplitude-versus-angle models and determine first order effects to look for 
        on various seismic displays.
•	Employ basic AVO interpretation: 1) knowing that an understanding of phase and polarity is critical to 
        successful interpretation and 2) recognising that changes in fluid may give rise to dim spots, bright spots or 
        phase reversals.
•	Calculate the vertical resolution of seismic data.
•	Recognise the importance of calibration of seismic to well data, including the issues involved in upscaling log 
        data to the seismic scale, and appreciate the importance of understanding accuracy in well ties.
•	Recognise the data sources used for building seismic models and understand the basics behind the application 
        of rock physics models in fluid and lithology substitution.
•	Apply Gassmann's equation to evaluate the effect of changing fluids on acoustic properties.
•	Comprehend the basics of seismic inversion and the potential pitfalls.
•	Understand the basics behind the various approaches to AVO analysis: 
        1) conventional 2 term reflectivity interpretation 
        2) elastic inversion 
        3) physics-driven trace matching.
•	Construct an AVO projection designed to optimise changes in fluid fill.
•	Appreciate the issues involved in Prospect Risking and understand the need for systematic analysis of 
        both geological and geophysical factors.
•	Appreciate the principles of seismic acquisition and processing needed to achieve 'AVO friendly' seismic data.

This course is offered by Nautilus (www.nautilusworld.com), a PEICE affiliated company and the world leader in Geosciences Training services.

A complete set of course materials and lunches are included.

All scheduled event(s) for this short course:
Date: TBA
Course Syllabus
Download course syllabus
Course Outline
  • Basic rock properties and reflectivity
  • The mechanics of seismic data processing (Geometry, Stacking and Migration)
  • An introduction to key processing issues
  • Seismic bandwidth and the convolutional model
  • Wavelets – phase and polarity
  • Resolution – sections and maps
  • Tying wells to seismic
  • The concept of trace inversion to acoustic impedance
  • Seismic data and the AVO plot
  • The rock physics basis of AVO
  • An introduction to AVO analysis
  • The elements of seismic modelling
  • Rock physics - where to get the numbers for modelling
  • Understanding real rocks – the key to rock physics modelling
  • Applying Rock Physics in Exploration (models and risk)

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John Chamberlain

Training Venue

To avoid potential course disruptions caused by the attendance of unconfirmed registrants, the training venue address will ONLY be provided to registrants upon receipt of payment (via an email confirmation note).