On receipt of well data we assess its quality and if needed make edits, corrections to account for invasion, or apply other petrophysical conditioning techniques as required. We can also carry out full petrophysical analysis if required using Paradigm's Geolog.

Log data and blocky averages are used in the modelling. Where there is no Vs log this is predicted using a number of techniques including Greenberg Castagna, Xu White.

Fluid substitution is performed and a wide range of attributes generated aimed at finding the best rock or fluid property discriminator e.g. Acoustic Impedance, Elastic Impedance, Poissons Ratio, Lambda Rho, Mu Rho etc. RokDoc is the ideal tool for this type of analysis as it is easy to use, fast and rigorous. Crossplot analysis is used to help determine the best discriminator either from one well or many wells in 2D or 3D.

Synthetic AVO gathers near and far stack traces are generated to determine the effects of various properties and conditions and compared to the response of the real seismic data.

2D synthetic seismic data (RokDoc-2D) is generated based on the extrapolation of log properties in the reservoir interval and on a digitised version of the real structural style of the area in question. Fluid substitution and other conditions can be changed and the seismic response measured to gauge what would be seen on real seismic data... a very powerful and useful tool.

This part of the analysis is key to understanding and predicting what should be seen in seismic data. The next stage is extracting these attributes and making sense of all the information.

Geology should never be far away as what is seen in the seismic data has to fit with or realistically adapt to an existing geological model.