How is stacking accomplished and Why do we stack data?

[Ernestazik]

Hi All,

The first question here ia about data stacking.

(a) Why do we stack data?

(b) What do we need to do to stack data

(c) How is stacking accomplished

I am asking these questions because I was not able to get satisfactory answers.

 

[billiards]

a) to improve the signal:noise ratio

b) prep the data by performing the normal moveout equation (which requires a velocity model) (and then usually muting the data) (sometimes you might even migrate before stacking).

c) by adding together all thte traces and dividing by the number of traces to some chosen power (usually to the power 1 - i.e. taking the mean of all traces).