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CHALLENGEAcquire quality data prior to formation and wellbore damage to achieve a better understanding of the field’s development potential.
SOLUTIONUse SonicScope* 900 multipole sonic-while-drilling service to deliver real-time formation evaluation data in one appraisal well.
RESULTS■■ Obtained high-quality acoustic data
throughout the entire 16-in section. ■■ Performed world’s first SonicScope 900
service in a 16-in section.■■ Achieved an ROP of up to 245 m/h
[804 ft/h] while drilling the 16-in section.
Obtain high-quality LWD measurements in challenging appraisal wells In a field in the Northern Australian basin, the upper formations consists of soft, unconsolidated sediments, while deeper zones pose drilling challenges due to reactive shale, circulation losses, and stick/slip. In previous wells, these attributes led to high risk of wellbore instability, bottomhole assembly damage, stuck pipe, and more.
To improve drilling operations, further explore the field’s development potential, and aid key decision making, an operator planned to drill and evaluate an appraisal well. With limited evaluation data from the formations in the upper sections, the operator wanted to acquire high-quality LWD acoustic measurements that would reduce uncertainty and mitigate overall operational risk.
Deliver accurate, real-time acoustic measurementsSchlumberger petrotechnical experts recommended using the SonicScope 900 multipole sonic-while-drilling service along with the arcVISION* array resistivity compensated service in the 16-in section. The SonicScope service combines high-quality monopole and quadrupole measurements to deliver robust compressional, shear, and Stoneley wave data for accurate pore pressure and fracture gradient estimates. In addition, the arcVISION service provided real-time resistivity, gamma ray, inclination, and annular pressure-while-drilling measurements.
Drilled with ROP up to 245 m/h while capturing high-resolution LWD dataDespite drilling challenges, the operator achieved an ROP of up to 245 m/h [804 ft/h] while drilling the 16-in section, doubling the planned ROP of 100 m/h [328 ft/h]. Using the SonicScope and arcVISION services, the operator was able to acquire accurate, reliable acoustic data—even in the unconsolidated upper section where severe washouts prevented quality logging data acquisition from wireline-conveyed measurement tools.
To obtain compressional slowness in the upper zone, Schlumberger used a leaky compressional mode (Leaky-P) processing that provides accurate data in this environment and is unique to the service. Standard monopole and quadrupole measurements were processed and delivered, providing a robust comparison with Sonic Scanner* acoustic scanning platform data. The operator used these numbers to understand the limitations of the borehole geomechanics, ensuring optimal well path designs for future development wells and, ultimately, improving project economics.
CASE STUDY
Drilling
SonicScope 900 Service Enables Reliable Acoustic Data Acquisition in Complex Appraisal WellDeployment of SonicScope service delivers high-quality, real-time data before formation washout compromised wireline logging, offshore Australia
Frequency, kHz0 5 10
5050
slb.com/sonicscope
*Mark of SchlumbergerOther company, product, and service names are the properties of their respective owners.Copyright © 2018 Schlumberger. All rights reserved. 17-DR-301268
CASE STUDY: Operator uses SonicScope service to gather formation data from 16-in well prone to washout
D T C O _MH _R 40 240 us /ft
D T C O 3 40 240 us /ft
D TSH 3
40 240 us /ft
6
D T 3
6
. Search b an d o ffse t : 444.583 u s Search b an d w id th : 2595.83 u s Sem b lan ce th resh o ld : 0 .35Slo w n ess lo w er lim it : 40 u s/ft Sh ear o n ly p ro cessin g : N o Slo w n ess step : 2 u s/ftSTC stack in g : N o Slo w n ess u p p er lim it : 240 u s/ft Slo w n ess w id th : 20 u s/ftC o m p u te SF A : Yes M ax freq u en cy : 12000 H z M in freq u en cy : 0 H zM o d e l o rd e r: 2 M atch in g to le ran ce : 50 T im e lo w er lim it : 480 u sC o m p ressio n a l lo w er lim it : 90 u s/ft C o m p re ssio n a l u p p er lim it : 202.5 u s/ft Sh ear lo w er lim it : 160 u s/ftSh ear u p p er lim it : 1112 u s/ft T im e step : 120 u s T im e u p p er lim it : 4320 u sT im e w id th : 1946 u s In teg ra t io n t im e w in d o w : 400 u s W av efo rm : W F A_M H SRefe ren ce rece iv e r: 6 Rece iv e r se lect io n : R1;R2;R3;R4;R5;R6;R7;R8;R9;R10;R11;R12
3 0 03 0 0
3 1 03 1 0
3 2 03 2 0
3 3 03 3 0
3 4 03 4 0
3 5 03 5 0
3 6 03 6 0
3 7 03 7 0
3 8 03 8 0
3 9 03 9 0
4 0 04 0 0
4 1 04 1 0
4 2 04 2 0
4 3 04 3 0
4 4 04 4 0
4 5 04 5 0
4 6 04 6 0
4 7 04 7 0
4 8 04 8 0
4 9 04 9 0
5 0 05 0 0
5 1 05 1 0
5 2 05 2 0
5 3 05 3 0
5 4 05 4 0
5 5 05 5 0
5 6 05 6 0
5 7 05 7 0
5 8 05 8 0
5 9 05 9 0
6 0 06 0 0
6 1 06 1 0
6 2 06 2 0
6 3 06 3 0
6 4 06 4 0
6 5 06 5 0
6 6 06 6 0
6 7 06 7 0
6 8 06 8 0
6 9 06 9 0
7 0 07 0 0
7 1 07 1 0
7 2 07 2 0
7 3 07 3 0
7 4 07 4 0
7 5 07 5 0
7 6 07 6 0
7 7 07 7 0
7 8 07 8 0
7 9 07 9 0
8 0 08 0 0
8 1 08 1 0
8 2 08 2 0
8 3 08 3 0
8 4 08 4 0
8 5 08 5 0
8 6 08 6 0
8 7 08 7 0
8 8 08 8 0
8 9 08 9 0
9 0 09 0 0
9 1 09 1 0
9 2 09 2 0
9 3 09 3 0
9 4 09 4 0
9 5 09 5 0
9 6 09 6 0
9 7 09 7 0
9 8 09 8 0
9 9 09 9 0
1 0 0 01 0 0 0
1 0 1 01 0 1 0
1 0 2 01 0 2 0
1 0 3 01 0 3 0
1 0 4 01 0 4 0
1 0 5 01 0 5 0
1 0 6 01 0 6 0
1 0 7 01 0 7 0
1 0 8 01 0 8 0
1 0 9 01 0 9 0
1 1 0 01 1 0 0
1 1 1 01 1 1 0
1 1 2 01 1 2 0
1 1 3 01 1 3 0
1 1 4 01 1 4 0
1 1 5 01 1 5 0
1 1 6 01 1 6 0
1 1 7 01 1 7 0
1 1 8 01 1 8 0
1 1 9 01 1 9 0
1 2 0 01 2 0 0
1 2 1 01 2 1 0
1 2 2 01 2 2 0
1 2 3 01 2 3 0
1 2 4 01 2 4 0
1 2 5 01 2 5 0
1 2 6 01 2 6 0
1 2 7 01 2 7 0
1 2 8 01 2 8 0
1 2 9 01 2 9 0
1 3 0 01 3 0 0
1 3 1 01 3 1 0
1 3 2 01 3 2 0
1 3 3 01 3 3 0
1 3 4 01 3 4 0
1 3 5 01 3 5 0
1 3 6 01 3 6 0
1 3 7 01 3 7 0
1 3 8 01 3 8 0
1 3 9 01 3 9 0
1 4 0 01 4 0 0
1 4 1 01 4 1 0
1 4 2 01 4 2 0
1 4 3 01 4 3 0
1 4 4 01 4 4 0
1 4 5 01 4 5 0
1 4 6 01 4 6 0
1 4 7 01 4 7 0
1 4 8 01 4 8 0
1 4 9 01 4 9 0
1 5 0 01 5 0 0
1 5 1 01 5 1 0
1 5 2 01 5 2 0
1 5 3 01 5 3 0
1 5 4 01 5 4 0
1 5 5 01 5 5 0
1 5 6 01 5 6 0
1 5 7 01 5 7 0
1 5 8 01 5 8 0
1 5 9 01 5 9 0
WL Gamma Ray
gAPI
Rate of Penetrationm/h
WL Cable Tension
LWD Gamma Ray Bit Size
WL Caliper Axis 1
WL Caliper Axis 2
WashoutAttenuation
Resistivity 40 in
LWD Monopole Slowness Coherence
LWD Monopole Compressional
Phase Shift Resistivity 40 in
gAPI
in
in
in
15 25
15 25
15 25
0 150
500 0
2,000 7,000
0 150
lbf
Mudcake
Phase Shift Resistivity 28 in
Phase Shift Resistivity 16 in
0.2 200
0.2 200
0.2 200
0.2 200 40 240 40 240 40 240
40 240
us/ftus/ft
us/ft
us/ft
us/ft
us/ft
WL Monopole Compressional
40 240us/ft
WL Monopole Slowness Coherence
40 240us/ft
LWD Monopole Compressional
WL Monopole Compressional
60 560
60 560
WL Dipole Slowness Coherence
LWD Quadrupole Slowness Coherence
LWD Quadrupole Shear WL Dipole Shear
us/ft60 560
us/ft60 560 60 560
60 560us/ft
us/ft
LWD Quadrupole Shear
WL Dipole Shear LWD Dispersion Analysis
MD(m)
1:500 ohm.m
ohm.m
ohm.m
ohm.m
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
D T C O _MH _R 40 240 us /ft
D T C O 3 40 240 us /ft
D TSH 3
40 240 us /ft
6
D T 3
6
. Search b an d o ffse t : 444.583 u s Search b an d w id th : 2595.83 u s Sem b lan ce th resh o ld : 0 .35Slo w n ess lo w er lim it : 40 u s/ft Sh ear o n ly p ro cessin g : N o Slo w n ess step : 2 u s/ftSTC stack in g : N o Slo w n ess u p p er lim it : 240 u s/ft Slo w n ess w id th : 20 u s/ftC o m p u te SF A : Yes M ax freq u en cy : 12000 H z M in freq u en cy : 0 H zM o d e l o rd e r: 2 M atch in g to le ran ce : 50 T im e lo w er lim it : 480 u sC o m p ressio n a l lo w er lim it : 90 u s/ft C o m p re ssio n a l u p p er lim it : 202.5 u s/ft Sh ear lo w er lim it : 160 u s/ftSh ear u p p er lim it : 1112 u s/ft T im e step : 120 u s T im e u p p er lim it : 4320 u sT im e w id th : 1946 u s In teg ra t io n t im e w in d o w : 400 u s W av efo rm : W F A_M H SRefe ren ce rece iv e r: 6 Rece iv e r se lect io n : R1;R2;R3;R4;R5;R6;R7;R8;R9;R10;R11;R12
3 0 03 0 0
3 1 03 1 0
3 2 03 2 0
3 3 03 3 0
3 4 03 4 0
3 5 03 5 0
3 6 03 6 0
3 7 03 7 0
3 8 03 8 0
3 9 03 9 0
4 0 04 0 0
4 1 04 1 0
4 2 04 2 0
4 3 04 3 0
4 4 04 4 0
4 5 04 5 0
4 6 04 6 0
4 7 04 7 0
4 8 04 8 0
4 9 04 9 0
5 0 05 0 0
5 1 05 1 0
5 2 05 2 0
5 3 05 3 0
5 4 05 4 0
5 5 05 5 0
5 6 05 6 0
5 7 05 7 0
5 8 05 8 0
5 9 05 9 0
6 0 06 0 0
6 1 06 1 0
6 2 06 2 0
6 3 06 3 0
6 4 06 4 0
6 5 06 5 0
6 6 06 6 0
6 7 06 7 0
6 8 06 8 0
6 9 06 9 0
7 0 07 0 0
7 1 07 1 0
7 2 07 2 0
7 3 07 3 0
7 4 07 4 0
7 5 07 5 0
7 6 07 6 0
7 7 07 7 0
7 8 07 8 0
7 9 07 9 0
8 0 08 0 0
8 1 08 1 0
8 2 08 2 0
8 3 08 3 0
8 4 08 4 0
8 5 08 5 0
8 6 08 6 0
8 7 08 7 0
8 8 08 8 0
8 9 08 9 0
9 0 09 0 0
9 1 09 1 0
9 2 09 2 0
9 3 09 3 0
9 4 09 4 0
9 5 09 5 0
9 6 09 6 0
9 7 09 7 0
9 8 09 8 0
9 9 09 9 0
1 0 0 01 0 0 0
1 0 1 01 0 1 0
1 0 2 01 0 2 0
1 0 3 01 0 3 0
1 0 4 01 0 4 0
1 0 5 01 0 5 0
1 0 6 01 0 6 0
1 0 7 01 0 7 0
1 0 8 01 0 8 0
1 0 9 01 0 9 0
1 1 0 01 1 0 0
1 1 1 01 1 1 0
1 1 2 01 1 2 0
1 1 3 01 1 3 0
1 1 4 01 1 4 0
1 1 5 01 1 5 0
1 1 6 01 1 6 0
1 1 7 01 1 7 0
1 1 8 01 1 8 0
1 1 9 01 1 9 0
1 2 0 01 2 0 0
1 2 1 01 2 1 0
1 2 2 01 2 2 0
1 2 3 01 2 3 0
1 2 4 01 2 4 0
1 2 5 01 2 5 0
1 2 6 01 2 6 0
1 2 7 01 2 7 0
1 2 8 01 2 8 0
1 2 9 01 2 9 0
1 3 0 01 3 0 0
1 3 1 01 3 1 0
1 3 2 01 3 2 0
1 3 3 01 3 3 0
1 3 4 01 3 4 0
1 3 5 01 3 5 0
1 3 6 01 3 6 0
1 3 7 01 3 7 0
1 3 8 01 3 8 0
1 3 9 01 3 9 0
1 4 0 01 4 0 0
1 4 1 01 4 1 0
1 4 2 01 4 2 0
1 4 3 01 4 3 0
1 4 4 01 4 4 0
1 4 5 01 4 5 0
1 4 6 01 4 6 0
1 4 7 01 4 7 0
1 4 8 01 4 8 0
1 4 9 01 4 9 0
1 5 0 01 5 0 0
1 5 1 01 5 1 0
1 5 2 01 5 2 0
1 5 3 01 5 3 0
1 5 4 01 5 4 0
1 5 5 01 5 5 0
1 5 6 01 5 6 0
1 5 7 01 5 7 0
1 5 8 01 5 8 0
1 5 9 01 5 9 0
WL Gamma Ray
gAPI
Rate of Penetrationm/h
WL Cable Tension
LWD Gamma Ray Bit Size
WL Caliper Axis 1
WL Caliper Axis 2
WashoutAttenuation
Resistivity 40 in
LWD Monopole Slowness Coherence
LWD Monopole Compressional
Phase Shift Resistivity 40 in
gAPI
in
in
in
15 25
15 25
15 25
0 150
500 0
2,000 7,000
0 150
lbf
Mudcake
Phase Shift Resistivity 28 in
Phase Shift Resistivity 16 in
0.2 200
0.2 200
0.2 200
0.2 200 40 240 40 240 40 240
40 240
us/ftus/ft
us/ft
us/ft
us/ft
us/ft
WL Monopole Compressional
40 240us/ft
WL Monopole Slowness Coherence
40 240us/ft
LWD Monopole Compressional
WL Monopole Compressional
60 560
60 560
WL Dipole Slowness Coherence
LWD Quadrupole Slowness Coherence
LWD Quadrupole Shear WL Dipole Shear
us/ft60 560
us/ft60 560 60 560
60 560us/ft
us/ft
LWD Quadrupole Shear
WL Dipole Shear LWD Dispersion Analysis
MD(m)
1:500 ohm.m
ohm.m
ohm.m
ohm.m
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
1 X X X
Slow
ness
, ft
Ampl
itude
, ft
Frequency, kHz0 5 10
450
400
350
300
250
200
150
100
50
350
300
250
200
150
100
50
Dispersion Plot—SonicScope serviceCurrent Depth: 1,XXX ft
0 5 10
Slow
ness
, ft
Ampl
itude
, ft
Frequency, kHz0 5 10
450
400
350
300
250
200
150
100
50
350
300
250
200
150
100
50
Dispersion Plot—SonicScope serviceCurrent Depth: 1,XXX ft
0 5 10
Slow
ness
, ft
Ampl
itude
, ft
Frequency, kHz0 5 10
450
400
350
300
250
200
150
100
50
350
300
250
200
150
100
50
Dispersion Plot—SonicScope serviceCurrent Depth: 1,XXX ft
0 5 10
Slow
ness
, ft
Ampl
itude
, ft
Frequency, kHz0 5 10
450
400
350
300
250
200
150
100
50
350
300
250
200
150
100
50
Dispersion Plot—SonicScope serviceCurrent Depth: 1,XXX ft
0 5 10
Slow
ness
, ft
Ampl
itude
, ft
Frequency, kHz0 5 10
450
400
350
300
250
200
150
100
50
350
300
250
200
150
100
50
Dispersion Plot—SonicScope serviceCurrent Depth: 1,XXX ft
0 5 10
Slow
ness
, ft
Ampl
itude
, ft
Frequency, kHz0 5 10
450
400
350
300
250
200
150
100
50
350
300
250
200
150
100
50
Dispersion Plot—SonicScope serviceCurrent Depth: 1,XXX ft
0 5 10
Slow
ness
, ft
Ampl
itude
, ft
Frequency, kHz0 5 10
450
400
350
300
250
200
150
100
50
350
300
250
200
150
100
50
Dispersion Plot—SonicScope serviceCurrent Depth: 1,XXX ft
0 5 10
Slow
ness
, ft
Ampl
itude
, ft
Frequency, kHz0 5 10
450
400
350
300
250
200
150
100
50
350
300
250
200
150
100
50
Dispersion Plot—SonicScope serviceCurrent Depth: 1,XXX ft
0 5 10
450350
Dispersion Plot—SonicScope serviceCurrent Depth: 1,XXX ft
0 5 10
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