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Seismic interferometry-by-deconvolution for controlled-source
and passive data
Kees Wapenaar, Joost van der Neut,Elmer Ruigrok, Deyan Draganov,
Juerg Hunzicker, Evert Slob,Jan Thorbecke
70th annual EAGE meetingJune 11, 2008
Rome
Review of seismic interferometry by cross-correlation
Seismic interferometry by deconvolution
• Introduction• Theory• Controlled-source data (‘virtual source’)• Passive data (surface wave retrieval)• Passive data (transmission-to-reflection)• Theory (revisited)
Conclusions
Contents
Review of seismic interferometry by cross-correlation
Seismic interferometry by deconvolution
• Introduction• Theory• Controlled-source data (‘virtual source’)• Passive data (surface wave retrieval)• Passive data (transmission-to-reflection)• Theory (revisited)
Conclusions
Contents
AxBx
S
ˆ2 { ( , , )}B AG x x* 22 ˆ ˆ( , , ) ( , , )B S A S SS
G G dc
x x x x x
Seismic interferometry by cross-correlation
( , , ) ( , , )B A B AG t G t x x x x22
( , , ) ( , , )B S A S SSG t G t d
c x x x x x
AxBx
S
Seismic interferometry by cross-correlation
( , , ) ( , , )B A B AG t G t x x x x
AxBx
S
Seismic interferometry by cross-correlation
( , ) ( , )B Ap t p t x x
Uncorrelated noise sources
target
virtualsource
Cross-correlation
1
( ) ( ) ( )N
k kk
D t S t S t
Seismic interferometry by cross-correlation
( , , ) ( , , ) ( , , )B A B S A S SC t p t q t d x x x x x x x
Summary:
The correlation function is in a specific way related to the Green’s function
( , , )B AC tx x
( , , )B AG tx x
( , , ) ( , , ) ( , , )B A B A B AC t G t G t x x x x x xe.g.
Seismic interferometry by cross-correlation
Seismic interferometry by cross-correlation
Properties:
• Requires no knowledge about sources and medium • Trace-by-trace process
• Sources on closed surface (except on free surface)• Sensitive to irregular source distribution• Medium is assumed lossless
Review of seismic interferometry by cross-correlation
Seismic interferometry by deconvolution
• Introduction• Theory• Controlled-source data (‘virtual source’)• Passive data (surface wave retrieval)• Passive data (transmission-to-reflection)• Theory (revisited)
Conclusions
Contents
( , , ) ( , , ) ( , , )B A B S A S SC t p t q t d x x x x x x x
Correlation approach:
( , , ) ( , , ) ( , , )B A B S A S SC t p t q t d x x x x x x x
Correlation approach:
( , , ) ( , , ) ( , , )B S B A A S Au t D t v t d x x x x x x x
Deconvolution approach:
( , , ) ( , , ) ( , , )B A B S A S SC t p t q t d x x x x x x x
Correlation approach:
( , , ) ( , , ) ( , , )B S B A A S Au t D t v t d x x x x x x x
Deconvolution approach:
data data
data data
( , , ) ( , , ) ( , , )B A B S A S SC t p t q t d x x x x x x x
Correlation approach:
( , , ) ( , , ) ( , , )B S B A A S Au t D t v t d x x x x x x x
Deconvolution approach:
Correlation function
Deconvolution function
( , , ) :B AC tx x
( , , ) :B AD tx x
data data
data data
Wapenaar and Verschuur, 1996, DelphiAmundsen, 1999, SEG, Wapenaar et al., 2000, SEGHolvik and Amundsen, 2005, GeophysicsSchuster et al., 2006, Geophysics
Seismic interferometry by deconvolution
0( , , ) ( , , ) ( , , )B S B A A S Ap t R t p t d x x x x x x x
target (reservoir)
Reflectionresponse R+
Upgoing wavefield P-
Downgoing wavefield P+
OBC example (1996)
Seismic interferometry by deconvolution
( , , )A Sp t x x ( , , )B Sp t x x 0 ( , , )B AR t x x
Review of seismic interferometry by cross-correlation
Seismic interferometry by deconvolution
• Introduction• Theory• Controlled-source data (‘virtual source’)• Passive data (surface wave retrieval)• Passive data (transmission-to-reflection)• Theory (revisited)
Conclusions
Contents
( , , ) ( , , ) ( , , )B A B S A S SC t p t q t d x x x x x x x
Correlation approach:
( , , ) ( , , ) ( , , )B S B A A S Au t D t v t d x x x x x x x
Deconvolution approach:
ˆ ˆ ˆ( , , ) ( , , ) ( , , )B A B S A S SC p q d x x x x x x x
Correlation approach:
ˆˆ ˆ( , , ) ( , , ) ( , , )B S B A A S Au D v d x x x x x x x
Deconvolution approach:
ˆ ˆ ˆ( , , ) ( , , ) ( , , )B A B S A S SC p q d x x x x x x x
Correlation approach:
ˆˆ ˆ( , , ) ( , , ) ( , , )B S B A A S Au D v d x x x x x x x
Deconvolution approach:
ˆ ˆ ˆU DV † † 2 1 †ˆ ˆ ˆ ˆ ˆ ˆ ˆ( ) D UV VV I UV
ˆ ˆ ˆ( , , ) ( , , ) ( , , )B A B S A S SC p q d x x x x x x x
Correlation approach:
ˆˆ ˆ( , , ) ( , , ) ( , , )B S B A A S Au D v d x x x x x x x
Deconvolution approach:
ˆ ˆ ˆU DV † † 2 1 †ˆ ˆ ˆ ˆ ˆ ˆ ˆ( ) D UV VV I UV
D̂ ˆ ( , , )B AD x x ( , , )B AD tx x
Review of seismic interferometry by cross-correlation
Seismic interferometry by deconvolution
• Introduction• Theory• Controlled-source data (‘virtual source’)• Passive data (surface wave retrieval)• Passive data (transmission-to-reflection)• Theory (revisited)
Conclusions
Contents
van der Neut et al., Thursday 14:55P272
black = directly modeled red = retrieved
Cross-Correlation
PP reflection
Deconvolution
black = directly modeled red = retrieved
PP reflection
Cross-Correlation
directly modeled
retrievedblack = directly modeledred = retrieved
PP reflection
directly modeled
retrieved
Deconvolution
black = directly modeledred = retrieved
PP reflection
black = directly modeled red = retrieved
PS reflection
Cross-Correlation
black = directly modeled red = retrieved
PS reflection
Deconvolution
directly modeled
retrieved
Cross-Correlation
black = directly modeledred = retrieved
PS reflection
directly modeled
retrieved
Deconvolution
black = directly modeledred = retrieved
PS reflection
Review of seismic interferometry by cross-correlation
Seismic interferometry by deconvolution
• Introduction• Theory• Controlled-source data (‘virtual source’)• Passive data (surface wave retrieval)• Passive data (transmission-to-reflection)• Theory (revisited)
Conclusions
Contents
USArray
ˆˆ ˆ( , , ) ( , , ) ( , , )B S B A A S Au G u d x x x x x x x
ˆˆ ˆ( , , ) ( , , ) ( , , )B S B A A S Au G u d x x x x x x x
Sx
AxBx
Cross-correlation
Deconvolution
Review of seismic interferometry by cross-correlation
Seismic interferometry by deconvolution
• Introduction• Theory• Controlled-source data (‘virtual source’)• Passive data (surface wave retrieval)• Passive data (transmission-to-reflection)• Theory (revisited)
Conclusions
Contents
▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼
1 … 26 … 51
▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼
1 … 26 … 51
ˆˆˆ ( , , ) ( , , ) ( , , )m B S mj B A j A S Av G t d x x x x x x x
▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼
1 … 26 … 51
ˆˆˆ ( , , ) ( , , ) ( , , )m B S mj B A j A S Av G t d x x x x x x x
Sx
AxBx
▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼
1 … 26 … 51
ˆˆˆ ( , , ) ( , , ) ( , , )m B S mj B A j A S Av G t d x x x x x x x
ˆˆ ˆ( , , ) ( , , ) ( , , )m B S m B S m B Sv v v x x x x x x
Sx
AxBx
with
▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼
1 … 26 … 51
ˆˆˆ ( , , ) ( , , ) ( , , )m B S mj B A j A S Av G t d x x x x x x x
ˆˆ ˆ( , , ) ( , , ) ( , , )m B S m B S m B Sv v v x x x x x x
Sx
AxBx
with
▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼
1 … 26 … 51
ˆˆˆ ( , , ) ( , , ) ( , , )m B S mj B A j A S Av G t d x x x x x x x
ˆˆ ˆ( , , ) ( , , ) ( , , )m B S m B S m B Sv v v x x x x x x
Sx
AxBx
with
▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼
1 … 26 … 51
3 33ˆ ˆˆ ( , , ) ( , , ) ( , , )B S B A A S Av G p d x x x x x x x
3 3 3ˆˆ ˆ( , , ) ( , , ) ( , , )B S B S B Sv v v x x x x x x
Sx
AxBx
with
(a) Correlation
t (s
)
Cross-correlation
t (s
)
(b) DeconvolutionDeconvolution
Ground Truth: Cross-correlation:
Ground Truth: Deconvolution:
Review of seismic interferometry by cross-correlation
Seismic interferometry by deconvolution
• Introduction• Theory• Controlled-source data (‘virtual source’)• Passive data (surface wave retrieval)• Passive data (transmission-to-reflection)• Theory (revisited)
Conclusions
Contents
( , , ) ( , , ) ( , , )B A B S A S SC t p t q t d x x x x x x x
Correlation approach:
( , , ) ( , , ) ( , , )B S B A A S Au t D t v t d x x x x x x x
Deconvolution approach:
The correlation function and thedeconvolution function are eachin a specific way related to the Green’s function
( , , )B AC tx x( , , )B AD tx x
( , , )B AG tx x
( , , ) ( , , ) ( , , )B A B S A S SC t p t q t d x x x x x x x
Correlation approach:
( , , ) ( , , ) ( , , )B S B A A S Au t D t v t d x x x x x x x
Deconvolution approach:
ˆ ˆ ˆ( , , ) ( , , ) ( , , )B A B S A S SC p q d x x x x x x x
Correlation approach:
ˆˆ ˆ( , , ) ( , , ) ( , , )B S B A A S Au D v d x x x x x x x
Deconvolution approach:
ˆ ˆ ˆU DV † † 2 1 †ˆ ˆ ˆ ˆ ˆ ˆ ˆ( ) D UV VV I UV
ˆ ˆ ˆ( , , ) ( , , ) ( , , )B A B S A S SD u v d x x x x x x x
Review of seismic interferometry by cross-correlation
Seismic interferometry by deconvolution
• Introduction• Theory• Controlled-source data (‘virtual source’)• Passive data (surface wave retrieval)• Passive data (transmission-to-reflection)• Theory (revisited)
Conclusions
Contents
Seismic interferometry by cross-correlation
• Requires no knowledge about sources and medium • Trace-by-trace process
Seismic interferometry by deconvolution
• Requires no knowledge about sources and medium • Can deal with one-sided illumination• Irregular source distribution• Dissipation allowed (e.g. CSEM)
59
CSEM by deconvolution (Slob et al.)
2D TM-examples for shallow and deep seaBlue curves: no reservoirRed curves: with reservoir
60
Electric field Magnetic field
61
Down going Up going
62
Deconvolved result not dependent on sea depth
CSEM by deconvolutionSolve:
0ˆˆ ˆ( , , ) ( , , ) ( , , )B S B A A S Ap R p d x x x x x x x
and are decomposed diffusion fields.
Correlation method not applicable
ˆ ( , , )B Sp x xˆ ( , , )A Sp x x
64
Numerical example: Seabed Logging in shallow seaoverburden effect
2D TM-examples for receivers in horizontal wellBlue curves: no reservoirRed curves: with reservoir
65
Electric field Magnetic field
66
Down going Up going
67
Deconvolved result not dependent on overburden
Random source distribution
100 sources+ 20 in cluster A + 30 in cluster B
Center freq of wavelet: 20 Hz
Dispersion 10
21 receivers in array 1
21 receivers in array 2
ˆ ˆ ˆ( , , ) ( , , ) ( , , )B A B S A S SC p q d x x x x x x x
Correlation approach:
ˆˆ ˆ( , , ) ( , , ) ( , , )B S B A A S Au D v d x x x x x x x
Deconvolution approach:
ˆ ˆ ˆU DV † † 2 1 †ˆ ˆ ˆ ˆ ˆ ˆ ˆ( ) D UV VV I UV
0ˆ ˆ ˆ( , , ) ( , , ){ ( , , )}B A B S A S SR p p d x x x x x x x
‘Virtual source’ by cross-correlationEvaluate:
‘Virtual source’ by deconvolutionSolve:
0ˆˆ ˆ( , , ) ( , , ) ( , , )B S B A A S Ap R p d x x x x x x x
Cross-correlation method is an approximation of deconvolution method
Conclusions
Correlation method: trace-by-trace process
Deconvolution method: Regular receiver gridIrregular source distributionDissipation allowed
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