Reliable estimates of pore pressure can not be expected at depths exceeding the maximum source-receiver offset used

[didodiab]

Reliable estimates of pore pressure can not be expected at depths exceeding the maximum source-receiver offset used...any explanation??

[GuyM]

Reliable estimates of pore pressure can not be expected at depths exceeding the maximum source-receiver offset used...any explanation??

That's normally the criteria for being able to determine the stacking velocities accurately, more or less.

So - if you are estimating pore pressure as a result of some kind of inversion of the stacking velocities, migration velocities, preSDM velocities or some other velocity data derived from the seismic then when you lose accuracy on the velocities (with depth), you'll lose accuracy on your pore pressure prediction.

There's some comments on why you lose velocity accuracy with depth here : http://seismicreflections.globeclaritas ... cking.html