声波测井仪器Acoustic_Tools_5700..
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Efficiency….Data accuracy….People-oriented service
Cdlc
ktkf
Borehole Compensated Slowness Measurement
CDLC
T1
Dt1 = Dt2 = T1R2 - T1R1 Receiver Spacing T2R1 - T2R2 Receiver Spacing
© 2000 Baker Hughes Incorporated All rights reserved. © 2002 Baker Hughes Incorporated All rights reserved.
Receiver Dt + Transmitter Dt 2
Cdlc ktkf
Efficiency….Data accuracy….People-oriented service
6” Dt from 1 Transmitter & 4 Receivers
T T
Transmitter Dt DtTR2 - DtTR1 = DtR2R1 DtTR3 - DtTR2 = DtR3R2 DtTR4 - DtTR3 = DtR4R3 DtR2R1 + DtR3R2 + DtR4R3 Transmitter Dt = 3 Receiver Dt DtTR2 - DtTR1 = DtR2R1 DtTR3 - DtTR2 = DtR3R2 DtTR4 - DtTR3 = DtR4R3
Cdlc
ktkf
6” Dt from 1 Transmitter & 4 Receivers
T T
6”
Synthetic Transmitter Array
T
T
T
CDLC
R1
R1
R2Leabharlann Baidu
R1
R2 R3 R4
R2
R3 R4
R3
R4
R1 R1 R2 R2 R3
Receiver Array
Cdlc ktkf
R1 R2
Dt1 + Dt2 Dt = 2
T2
© 2000 Baker Hughes Incorporated All rights reserved. © 2002 Baker Hughes Incorporated All rights reserved.
Efficiency….Data accuracy….People-oriented service
TR
Efficiency….Data accuracy….People-oriented service
Cdlc
ktkf
Slowness Measurement
CDLC
A B C D E
T
Dt = Dt =
TR2 - TR1 Receiver Spacing
(A+B+D+E) - (A+B+C)
Receiver Spacing
Efficiency….Data accuracy….People-oriented service
Cdlc
ktkf
Tool Tilt or Cave Boundary
CDLC
A
A B C D E
T
B C D E
R1
R2
© 2000 Baker Hughes Incorporated All rights reserved. © 2002 Baker Hughes Incorporated All rights reserved.
CDLC
声波仪器
Piezoelectric Transducers
CDLC
+
T
-
R
Piezoelectric Transducers
CDLC
T
T
R R
Slowness Measurement
CDLC
A
T
Dt = (A+B+C) / TR
B C R
© 2000 Baker Hughes Incorporated All rights reserved. © 2002 Baker Hughes Incorporated All rights reserved.
Cancellation
CDLC
© 2000 Baker Hughes Incorporated All rights reserved. © 2002 Baker Hughes Incorporated All rights reserved.
Efficiency….Data accuracy….People-oriented service
R3
R
© 2000 Baker Hughes Incorporated All rights reserved. © 2002 Baker Hughes Incorporated All rights reserved.
R4
4 Efficiency….Data accuracy….People -oriented service
Cdlc
ktkf
Dipole vs. Monopole
Source P S Wave P S Wave
CDLC
P
P
Receiver
P
P Wave S Wave P Source
P P Wave S Wave
P
Receiver
© 2000 Baker Hughes Incorporated All rights reserved. © 2002 Baker Hughes Incorporated All rights reserved.
Efficiency….Data accuracy….People-oriented service
Cdlc
ktkf
Receivers - Dipole vs. Monopole
Synthetic Transmitter Array 6”
T
CDLC
R1 R2 R3 R4
R1 R2 R3 R4
T
T
R1 R2 R3 R4
R1 R2 R3 R4
R1 R2 R3 R4
Receiver Array
DtR2R1 + DtR3R2 + DtR4R3 Receiver Dt = 3
Dt6” =
Assuming C = E
R1
R2
Receiver Spacing
Dt =
D
Receiver Spacing
© 2000 Baker Hughes Incorporated All rights reserved. © 2002 Baker Hughes Incorporated All rights reserved.