REFLECTION AND TRANSMISSION COEFFICIENTS

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REFLECTION AND TRANSMISSION COEFFICIENTS
INCOMING WAVE
REFLECTED WAVE
Aj
Ar
At
TRANSMITTED WAVE
WHERE Aj AMPLITUDE OF THE INCOMING
WAVE Ar AMPLITUDE OF THE REFLECTED WAVE
At AMPLITUDE OF THE REFLECTED WAVE R
REFLECTION COEFFICIENT T TRANSMISSION
COEFFICIENT
2
CRITICAL ANGLE FOR REFRACTION
3
RAY PATH FOR A REFRACTION
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REFLECTED WAVE
5
MULTIPLY REFLECTED WAVE
? X
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REFRACTED WAVE
? X
V1
? Z
L1
L3
L2
?X
REFLECTED WAVE
WHERE 2l1 DISTANCE IN LAYER 1 l2
DISTANCE IN LAYER 2
t
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DIFFRACTED WAVE
t 2 l /V
?X
T2?X/V
t
8
RAY PATH FIRST ARRIVAL OF DIFFERENT WAVE FORMS
9
SHOT GATHER
10
CDP GATHER
11
ZERO OFFSET SECTION
12
DIRECT WAVE
? X
V
? Z
T ? X/V
?X
WHERE ? X GEOPHONE OFFSET ? Z LAYER
THICKNESS
t
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MULTIPLE RAYPATH
14
ATTENUATION TECHNIQES
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NORMAL-INCIDENCE REFLECTION AND TRANSMISSION
COEFFICIENTS
DENSITY r1 VELOCITY V 1 DENSITY r 2 VELOCITY V2
WHERE r1 DENSITY OF LAYER 1 V1
VELOCITY OF LAYER 1 r 2 DENSITY OF LAYER
2 V2 VELOCITY OF LAYER 2
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