ZP

This small utility was developed to quickly generate AVO curves based on a simple isotropic interface model from a LAS file containing p-wave, s-wave and density logs.

Stochastic realizations of a selected interface can be computed by Monte Carlo simulation based on random sampling of correlated multi-gaussian distributions using Cholesky decomposition.

2D probability density functions of Rpp or P-G can be generated using the simulated realizations.

 The workflow is simple:

1. Load your LAS file,
2. Define the Vp, Vs and Density logs
3. Change the units of velocities if necessary
4. Define your layers
5. Store your interface model in the model list
6. Run probabilistic analysis from a stored interface by double click on the interface name
7. Generate 2D PDF from realizations
8. Export 2D PDF

Actions:

Model definition: ctrl+left click

Zoom on logs: left click +drag

Unzoom: left click

Pan: right click+drag

Interfaces can be saved or delete with +/- buttons

Attachments:

File	Description	File size	Last modified
logAVO	win32/win64 executable	3676 kB	2015-05-25 10:07
logAVO zipped version	zipped to solve download problems	1393 kB	2015-05-06 17:04

References:

Aki, K, and PG Richards (1980). Quantitative Seismology: Theory and Methods. WH Freeman and Co.

Shuey, R.T.  1985.  A Simplification of the Zoeppritz Equations  -  Geophysics, 50, 609 - 614

The application was coded using FPC and Lazarus. Dmath library was used to code the hard stuff. Images from FatCow Farm Fresh Icons were modified to use in this app.