CFP technology DELPHI consortium. slide 2 CFP technology Data t x z x TWT CFP method OWT z x...
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Transcript of CFP technology DELPHI consortium. slide 2 CFP technology Data t x z x TWT CFP method OWT z x...
CFP technology slide 2
Data
t
x
z
xTWT
CFP methodCFP methodOWT
z
x
Focusing Operator
t
x
*
CFP gather
=
t
x
z
x OWT
Stack
CFP technology slide 3
CFP methodCFP methodOWT
z
x
Focusing Operator
t
x
*
Data
t
x
z
xTWT
CFP gather
t
x
z
x OWT
=Stack
CFP technology slide 4
CFP methodCFP method
*
OWT
z
x
Focusing Operator
t
x Data
t
x
z
xTWT
CFP gather
t
x
z
x OWT
=Stack
CFP technology slide 5
CFP methodCFP method
*
OWT
z
x
Focusing Operator
t
x Data
t
x
z
xTWT
CFP gather
t
x
z
x OWT
=Stack
CFP technology slide 6
CFP methodCFP method
*
OWT
z
x
Focusing Operator
t
x Data
t
x
z
xTWT
CFP gather
t
x
z
x OWT
=Stack
CFP technology slide 7
CFP methodCFP method
*
OWT
z
x
Focusing Operator
t
x Data
t
x
z
xTWT
CFP gather
t
x
z
x OWT
=Stack
CFP technology slide 8
CFP methodCFP method
*
OWT
z
x
Focusing Operator
t
x Data
t
x
z
xTWT
CFP gather
t
x
z
x OWT
=Stack
CFP technology slide 9
Principle of equal traveltimePrinciple of equal traveltimeOWT
z
x
Focusing Operator
t
x CFP gather
t
x
z
x OWT
Operator:
response of one point in the subsurface
CFP gather:
response of the same point in the subsurface
Operator and CFP gather have the same travel times for the same focal point
CFP technology slide 10
Data
t
x
z
xTWT
CFP methodCFP method(erroneous operator)(erroneous operator)
OWT
z
x
Focusing Operator
t
x
*
CFP gather
=
t
x
z
x OWT
Stack
CFP technology slide 11
CFP gather
=
t
x
z
x OWT
Stack
CFP methodCFP method (erroneous operator) (erroneous operator)
OWT
z
x
Focusing Operator
t
x
*
Data
t
x
z
xTWT
CFP technology slide 12
CFP methodCFP method (erroneous operator) (erroneous operator)
Data
t
x
z
xTWTOWT
z
x
Focusing Operator
t
x
*
CFP gather
=
t
x
z
x OWT
Stack
CFP technology slide 13
CFP methodCFP method (erroneous operator) (erroneous operator)
Data
t
x
z
xTWTOWT
z
x
Focusing Operator
t
x
*
CFP gather
=
t
x
z
x OWT
Stack
CFP technology slide 14
CFP methodCFP method (erroneous operator) (erroneous operator)
Data
t
x
z
xTWTOWT
z
x
Focusing Operator
t
x
*
CFP gather
=
t
x
z
x OWT
Stack
CFP technology slide 15
CFP methodCFP method (erroneous operator) (erroneous operator)
Data
t
x
z
xTWTOWT
z
x
Focusing Operator
t
x
*
CFP gather
=
t
x
z
x OWT
Stack
CFP technology slide 16
CFP methodCFP method (erroneous operator) (erroneous operator)
Data
t
x
z
xTWTOWT
z
x
Focusing Operator
t
x
*
CFP gather
=
t
x
z
x OWT
Stack
CFP technology slide 17
Erroneous Focusing Erroneous Focusing OperatorsOperators
Depth -10 % Depth + 10%Depth - 10% Vel + 10%Vel - 10%No error
Correct focusing operator is in between: erroneous Operator and its related erroneous CFP gather
CFP technology slide 18
Differential Time Shift panelDifferential Time Shift panel
0dt
x*
DTS panel
CFP gather
t
x
z
x OWTOWT
z
x
Focusing Operator
t
x
CFP technology slide 19
Focusing Operator updatingFocusing Operator updating
0dt
x DTS panel
Half of tracked time in DTS panel
Previous input focusing operator
Updated focusing operator
=
+
t
xCFP gather & Focusing Operators