Geophysics Forum

Hey guys,
How are you?

I am just wondering what a normal day look like for a geophysicist in the industry?
What are your main tasks? What is the most important thing you have to know in seismic prosessing?

Kind regards

Thank you for making the sentence easier to understand

Thank you so much :D What is the difference between time and depth when it comes to diffraction and sensitivity to velocity? Do you also know what this sentence means below: "As a stacking operator for diffractions, Double Square Root operator provides an exact traveltime for a point diffractor in a...

Why is diffractions sensitive to velocity? And why can we build a improved velocity models from diffraction?

Hope you can help

Thank you so much, GuyM. You have helped me alot

Thank you for the explanation

What is the diffrence between wavefront and wavefield?

Hello

Please, does anyone understands this figure below?
Do someone here know the difference between Diffraction summing migration and the Kirchoff migration simply explained?

What is the weight factor in the equation?

Thank you

Hello again,
Thank you for the explanation.

Do you also know what a ladder effect is for diffraction?

For reflections, we have this curve in the CMP gather.
What will happen for diffraction? How do we interpret these? Why does it have a hyperbolic shape?
What does the diffraction tell us about the structure?
Why does the diffraction apex have low velocity and increase with the flanks?

Thank you so much for all your help
You are really good at explaining and you make these different seismic definitions and
situations easier to understand.

I am on my 2nd year of studying geophysics. It is quite interesting.
Thank you for your help again. I will use your blog.

What is the definition of data redundancy in seismic processing?

Thanks for the explanation! What does data redundancy mean? Is that like reduce in the data or something?

Hey again, How do you relate the NMO equation to Pythagorean theorem? how does it go from equation 3 to equation 4? On equation 4 --> why isn't it x/2? Why do they consider the whole offset and not half of it only in the theorem? Is it because we have to use the whole offset since we have to find th...

Sorry, english is not my first language so it is hard to understand the English.
Thank you for the explanation:)

Why does eq 2 have NMO velocity? and i still didn't understand why there is 4h^2..

Hope you can help

Why do the nmo eq go from "nmo eq 1" to "nmo eq 2"? (see figure text)
x = offset and h= half offset.
why is there a 4 and not a 2?

Thank you so much

Hey again,

what is also "sudden change in facies", "near-surface scattering" and "pinch out"?
What is a small scale feature?

Sorry that I ask so many questions.

What type of wave theory is considered in Kirchhoff time migration?

Thank you, GuyM:)

Did someone here understand what "dip dependent" means? On the equation below it says dip dependent? Is this related to the structure or what? And what is horizontal slowness? M is the midpoint displacement with respect to the considered common midpoint position m0 x is the half source receiver offs...

thank you

the first to start with is the velocity model, then from this model the stack is created. Then after a semblance search we get the semblance plot What does it mean that "reflections and diffractions have different kinematic properties"? And "the kinematic part of data sorted in CMP gather can be a n...