Is Superresolution by RTM Achievable?
Tucson, Arizona Test
T u n n el a t lev e l 2(3 0 m fro m g ro u n d )
T u n n el a t lev e l 3(4 5 m fro m g ro u n d )
Sh
aft G rou n d S u rface3 0 m
1 5 m
S h o t lo ca tio n
R ece iv e r lo ca tio n
S h aft en tran ce
60 m
Poststack Migration
1 0 1 2 1 4 1 6 1 8 2 0 2 2 2 4 2 6 2 8 3 0X (m )
-0 .2
0
0 .2
0 .4
0 .6
0 .8
1
Nor
mal
ized
Am
pli
tud
e
D ire c t - F u ll A p ra tu reD ire c t - H a lf A p ra tu reS c a tte re rs - F u ll A p ra tu reS c a tte re rs - H a lf A p ra tu re
S u p er-reso lu tio n T est - P o in t # 1 4 a t X = 2 4 m
~Kirchhoff Mig.
~Scattered RTM
This is highest fruit on the tree..who dares pick it?
(Hanafy et al., 2008)
Can Scatterers Beat the Resolution Limit?
Recorded Green’s functions G(s|x) divided into:
- Shot gathers with direct arrivals only
- Shot gathers with scattered arrivals only
0 2 0 4 0 6 0 8 0 1 0 0 1 2 0
D ista n ce (m )
0 .5
0 .4
0 .3
0 .2
0 .1
0T
ime
(ms)
G reen 's F u n ctio nA fter b a n d -p a ss filter
0 2 0 4 0 6 0 8 0 1 0 0 1 2 0
D ista n ce (m )
0 .5
0 .4
0 .3
0 .2
0 .1
0
Tim
e (m
s)
G reen 's F u n ctio nA fter b a n d -p a ss filter
0 2 0 4 0 6 0 8 0 1 0 0 1 2 0
D ista n ce (m )
0 .5
0 .4
0 .3
0 .2
0 .1
0
Tim
e (m
s)
G reen 's F u n ctio nA fter b a n d -p a ss filter
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