GEOL463
Amplitude-vs. Offset (AVO) properties
To extract subtle rock properties, dependences of reflection amplitudes on source-receiver offsets are analysed.
For example, gas-filled pores tend to reduce VP more than VS, and as a result, reflection amplitudes from a gas sand increase with incidence
angles (and therefore offsets).
Such analysis leads to additional AVO attribute sections (“intercept,” “gradient,” and many
other)
Simplified AVO equation