Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko...
Transcript of Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko...
![Page 1: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/1.jpg)
Making Marchenko imaging work with field data and the bumpy road to 3D
Alex Jia*, Antoine Guitton, and Roel Snieder Center for Wave Phenomena, Colorado School of Mines
![Page 2: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/2.jpg)
2
![Page 3: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/3.jpg)
3
RTM Marchenko Imaging pros whole model
easy implementation
target orientated remove artifacts by
internal multiples cons artifacts by internal
multiples
require wavelet learning curve (e.g.
acquisition geometry)
![Page 4: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/4.jpg)
outline
‣ Marchenko imaging: how and why?
‣ Complications: ‣ missing near offsets
‣ data calibration
‣ Why is 3D Marchenko necessary and challenging?
4
![Page 5: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/5.jpg)
5
Marchenko equations
background velocity model
surface data
surface response to virtual source
(reverse VSP data) first arrival
![Page 6: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/6.jpg)
6
Marchenko equations
background velocity model
surface data
up-going and down-going
Green’s function first arrival
![Page 7: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/7.jpg)
7
Marchenko equations
background velocity model
surface data
up-going and down-going
Green’s function
Marchenko image
first arrival
![Page 8: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/8.jpg)
8
G+ 1
2
3
![Page 9: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/9.jpg)
9
G-
a
b
![Page 10: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/10.jpg)
missing near offsets
10
missing near offsets: 7 traces, 214 m
![Page 11: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/11.jpg)
11 full offset missing near offsets difference
retrieved Green’s function
![Page 12: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/12.jpg)
missing near offset
‣ stronger for shallow events and near offset events
‣ maximum missing near offset
12
D: depth of reflector T: dominant wave period assumption: hyperbolic assumption for flat multi-layered earth (details in CWP report)
![Page 13: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/13.jpg)
13
![Page 14: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/14.jpg)
14 full offset missing near offsets RTM
![Page 15: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/15.jpg)
data calibration
‣ input 1: surface reflection response
‣ input 2 : first arrival
‣ amplitude should match
15
![Page 16: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/16.jpg)
retrieved Green’s function
16 scale=0.5 scale=1 scale=1.5
![Page 17: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/17.jpg)
17
![Page 18: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/18.jpg)
data calibration
18 scale=0.5 scale=1 scale=1.5
![Page 19: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/19.jpg)
19 0.
001
0.00
1
first arrival
synthetic
field *
![Page 20: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/20.jpg)
20 0.
001
0.00
1
first arrival
synthetic
field (scaled) *
![Page 21: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/21.jpg)
2D can be deceptive
21
![Page 22: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/22.jpg)
22
Green’s function in 3D structure
x=0.5, y=1, z=0.5 x=0.5, y=1, z=0
![Page 23: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/23.jpg)
23
retrieved
x=0.5, y=1, z=0.5 x=0.5, y=1, z=0
![Page 24: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/24.jpg)
24
retrieved
x=0.5, y=1, z=0.5 x=0.5, y=1, z=0
![Page 25: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/25.jpg)
25
retrieved
modelled
x=0.5, y=1, z=0.5 x=0.5, y=1, z=0
![Page 26: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/26.jpg)
3D Marchenko
26
(http://www.prism-exploration.com/seismic-ops) (Wang et al. 2009)
ocean bottom data streamer data (dense in-line, sparse x-line)
![Page 27: Making Marchenko imaging work with field data and the bumpy … · 2019. 8. 31. · 5 Marchenko equations . background . velocity model . surface data . surface response to virtual](https://reader033.fdocuments.in/reader033/viewer/2022060915/60a8cc5e9d9de652d233af7f/html5/thumbnails/27.jpg)
27