AVO and Seismic Inversion
Course Objectives
To describe the processes of AVO (Amplitude vs Offset), and Seismic Inversion, emphasizing on the techniques for obtaining acoustic impedance and "elastic" impedances from the amplitudes of the reflection seismic traces, as well as giving an introduction of those based on the use of attributes of the seismic trace for the estimation of rock parameters.
The course is designed for
Geophysicists, geologists and reservoir engineers with some basic knowledge of the seismic reflection method.
Course outline
Azimuthal AVO
Poststack Inversion Techniques
- Relative Inversion
- Coloured Inversion
- Recursive Inversion with a Low Frequency Component
- Model-based inversion
- Stochastic Inversion
Prestack Inversion Techniques
- Simultaneous Inversion
- Elastic Impedance
- Extended Elastic Impedance
Introductión to the Methods for Classification and Estimation base on seismic attributes
Introduction
Seismic Waves: P and S
The Seismic Reflection Process – AVO - AVA
- Oblique vs Normal Incidence
- Zoeppritz’s Equations
- AVO/AVA Curves
The Convolutional Model of the Seismic Trace
Thin Bed Effect – Seismic Resolution
Pre-requisites for the AVO and Inversion Processes
- Acquisition
- Process
Some Rock Physics Concepts
- Elastic Modules
- Elastic vs Petrophysical Parameters
- P and S Velocities
- Rock Physics Templates
Data Analysis and Validation
- Quality of Well Logs
- Quality of Seismic Data
- Time-Depth Correlation
- Synthetic Seismograms
AVO Processing
- Approximation to Zoeppritz’s equations
- Distance-Angle Relation
- Generation of “Elastic Reflectivities”
