Five classes of gas sand response

[EvanBianco]

One of the release tests should be a validation of the five classes of AVO responses. I have created five gas sands as an Admin on the test server, based on the Castagna and Swan (1997) paper. Strictly speaking, this model doesn't test the correctness of fluid substitution, but can be a launch pad for considering the effect of water saturation of the various gas sand responses.

The rocks used in this model are given in this spreadsheet (in case the database gets lost).

https://docs.google.com/spreadsheets/d/1jRgPxrS4sD6ifHJDy2Kb8WQ-BH5gYfxPvHoGpJGNv5g/pubhtml

We should consider scripting up this model to make the sand intervals identical thickness.

From top to bottom we see the following AVO class reponses relative to the background shale:

• Class 1
• Class 2
• Class 2p (phase reversal)
• Class 3
• Class 4

[ben-bougher]

Moving out of github. Trying to keep release test procedure in a google doc. https://docs.google.com/document/d/11QcxX50YgHNDA6eBZXVPT4AoK8WCIfhFNt2qaB3tgdY/edit