[OpendTect_Users] Importing data sets with different survey geometries

[Bert Bril]

Hi all,

Nayyer wrote:


> I am working on some time-lapse data that were restricted to a small
> area aiming to study the one producing reservoir. I have legacy data
> from the same area but with a broader survey geometry and different
> inline and xline numbers.

That is your problem. A survey in OpendTect is bound to a 3D geometry. 
We are working towards a situation in which multiple 3D geometries can 
co-exist, but it's a long and difficult task so I wouldn't count on it 
for a couple of years.


> One main difference between the two geometries
> is that the time-lapse data starts from -8ms while legacy starts from 0ms.

That is not a problem at all. We have that all the time.

The problem is different geometries. If one is really just an extension 
of the other, then simply extend the boundaries of the survey.

But in general, the traces from two surveys will not be at the same 
positions. Then you need that lined up first. You'd best do that in a 
good processing package.

Because such a situation is not uncommon we have also made something 
ourselves, using a sinc interpolation to get data from another survey 
into your current survey.

You can do this by importing the data into a separate survey. When 
that's done you can choose what you want to make your 'master' survey. 
Load the other cube using 'Survey-Import-Seismics-CBVS-From other survey'.


Hope that helps.


Bert