Search found 34 matches

by Tingpingbing
Thu Oct 15, 2020 11:09 am
Forum: General Geophysics and Geoscience
Topic: Work life - what do a geophysicist do in the oil and gas industry?
Replies: 1
Views: 115

Work life - what do a geophysicist do in the oil and gas industry?

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
by Tingpingbing
Tue Sep 08, 2020 8:49 am
Forum: General Geophysics and Geoscience
Topic: Diffraction sensitive to velocity
Replies: 4
Views: 791

Re: Diffraction sensitive to velocity

Thank you for making the sentence easier to understand :)
by Tingpingbing
Mon Sep 07, 2020 4:11 am
Forum: General Geophysics and Geoscience
Topic: Diffraction sensitive to velocity
Replies: 4
Views: 791

Re: Diffraction sensitive to velosity

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...
by Tingpingbing
Sun Sep 06, 2020 5:22 pm
Forum: General Geophysics and Geoscience
Topic: Diffraction sensitive to velocity
Replies: 4
Views: 791

Diffraction sensitive to velocity

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

Hope you can help :)
by Tingpingbing
Sun Sep 06, 2020 5:04 am
Forum: General Geophysics and Geoscience
Topic: The Kirchhoff migration
Replies: 3
Views: 424

Re: The Kirchhoff migration

Thank you so much, GuyM. You have helped me alot :D
by Tingpingbing
Sat Sep 05, 2020 5:24 pm
Forum: General Geophysics and Geoscience
Topic: wavefront vs wavefield
Replies: 2
Views: 250

Re: wavefront vs wavefield

:D Thank you for the explanation
by Tingpingbing
Sat Sep 05, 2020 10:02 am
Forum: General Geophysics and Geoscience
Topic: wavefront vs wavefield
Replies: 2
Views: 250

wavefront vs wavefield

What is the diffrence between wavefront and wavefield?
by Tingpingbing
Sat Sep 05, 2020 9:06 am
Forum: General Geophysics and Geoscience
Topic: The Kirchhoff migration
Replies: 3
Views: 424

The Kirchhoff migration

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?
by Tingpingbing
Sat Sep 05, 2020 8:54 am
Forum: General Geophysics and Geoscience
Topic: diffraction-in seismic
Replies: 4
Views: 428

Re: diffraction-in seismic

:D Thank you
by Tingpingbing
Fri Sep 04, 2020 12:12 pm
Forum: General Geophysics and Geoscience
Topic: diffraction-in seismic
Replies: 4
Views: 428

Re: diffraction-in seismic

Hello again,
Thank you for the explanation.

Do you also know what a ladder effect is for diffraction?
by Tingpingbing
Fri Sep 04, 2020 10:23 am
Forum: General Geophysics and Geoscience
Topic: diffraction-in seismic
Replies: 4
Views: 428

diffraction-in seismic

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?
by Tingpingbing
Wed Sep 02, 2020 12:23 pm
Forum: General Geophysics and Geoscience
Topic: meaning of redundancy
Replies: 4
Views: 425

Re: meaning of redundancy

Thank you so much for all your help :D
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. :thumbup:
by Tingpingbing
Tue Sep 01, 2020 8:52 am
Forum: General Geophysics and Geoscience
Topic: meaning of redundancy
Replies: 4
Views: 425

meaning of redundancy

What is the definition of data redundancy in seismic processing?
by Tingpingbing
Mon Aug 31, 2020 11:36 am
Forum: General Geophysics and Geoscience
Topic: migration of diffractions
Replies: 7
Views: 949

Re: migration of diffractions

Thanks for the explanation! :) What does data redundancy mean? Is that like reduce in the data or something?
by Tingpingbing
Sat Aug 29, 2020 2:25 pm
Forum: General Geophysics and Geoscience
Topic: nmo eq
Replies: 7
Views: 657

Re: nmo eq

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...
by Tingpingbing
Fri Aug 28, 2020 8:03 pm
Forum: General Geophysics and Geoscience
Topic: nmo eq
Replies: 7
Views: 657

Re: nmo eq

Sorry, english is not my first language so it is hard to understand the English.
Thank you for the explanation:)
by Tingpingbing
Fri Aug 28, 2020 5:52 pm
Forum: General Geophysics and Geoscience
Topic: nmo eq
Replies: 7
Views: 657

Re: nmo eq

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

Hope you can help
by Tingpingbing
Fri Aug 28, 2020 5:07 pm
Forum: General Geophysics and Geoscience
Topic: nmo eq
Replies: 7
Views: 657

nmo eq

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?


:?:
by Tingpingbing
Fri Aug 28, 2020 1:19 pm
Forum: General Geophysics and Geoscience
Topic: wave theory - kirchhoff migration
Replies: 4
Views: 479

Re: wave theory - kirchhoff migration

Thank you so much :D
by Tingpingbing
Fri Aug 28, 2020 7:34 am
Forum: General Geophysics and Geoscience
Topic: wave theory - kirchhoff migration
Replies: 4
Views: 479

Re: wave theory - kirchhoff migration

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.
by Tingpingbing
Thu Aug 27, 2020 4:11 am
Forum: General Geophysics and Geoscience
Topic: wave theory - kirchhoff migration
Replies: 4
Views: 479

wave theory - kirchhoff migration

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

:thumbup:
by Tingpingbing
Tue Aug 25, 2020 5:00 am
Forum: General Geophysics and Geoscience
Topic: dip dependent - meaning
Replies: 2
Views: 336

Re: dip dependent - meaning

Thank you, GuyM:)
by Tingpingbing
Mon Aug 24, 2020 5:39 pm
Forum: General Geophysics and Geoscience
Topic: dip dependent - meaning
Replies: 2
Views: 336

dip dependent - meaning

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...
by Tingpingbing
Sun Aug 23, 2020 2:31 pm
Forum: General Geophysics and Geoscience
Topic: diffraction hyperbola
Replies: 4
Views: 457

Re: diffraction hyperbola

thank you :thumbup:
by Tingpingbing
Sun Aug 23, 2020 10:06 am
Forum: General Geophysics and Geoscience
Topic: diffraction hyperbola
Replies: 4
Views: 457

Re: diffraction hyperbola

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...