2024年7月31日发(作者：符悦爱)
CASE STUDY
Sinopec Uses PowerDrive Archer RSS with Near-Bit GR
Imaging to Steer Drilling 100% in Pay Zone, China
MWD and RSS technologies ensure accurate well placement in a thin shale reservoir
CHALLENGE
■
Maximize shale recovery potential while
drilling two horizontal exploration wells in
the Dingye field.
■
Distinguish between the gamma ray (GR)
responses of a thin reservoir that are similar
to the layers above and below.
SOLUTION
■
Use PowerDrive Archer* high build rate
rotary steerable system (RSS) with near-
bit gamma ray (GR) imaging to ensure
accurate wellbore placement within
a narrow pay zone.
RESULTS
■
Successfully drilled the 1,234-m
[4,048.56-ft] and 1,556-m [5,105-ft] target
lateral sections while maintaining 100%
reservoir contact.
Maximize net pay in narrow pay zone shale wells
After discovering Fuling field in 2012, China’s first commercial unconventional gas field, Sinopec began
an ambitious exploration drilling campaign in the nearby Dingye structure. In previous unconventional
wells, Sinopec used average GR to guide well trajectories. However, horizontal wells in Dingye field
showed similar GR response in the layers directly above and below the pay zone—which ranged
from just 2 to 3 m [2.5 to 9.8 ft] thick. To ensure optimal well placement and reduce uncertainty in
the planned 1,200–1,500-m lateral sections, Sinopec partnered with Schlumberger for directional
drilling services.
Deploy RSS with near-bit GR imaging to enable precise directional drilling
Schlumberger and Sinopec decided to incorporate the PowerDrive Archer high build rate RSS into
the bottomhole assembly. In addition to delivering a high rate of penetration and better wellbore
quality, the system’s built-in, near-bit azimuthal gamma ray measurement capabilities enable precise,
proactive geosteering in thin pay zones. Dynamic near-bit gamma ray images help identify structural dip
information, allowing the drilling team to make quick geosteering decisions and minimize the risk
of exiting the target.
Borehole Corrected
PowerDrive RSS
Gamma Ray Down
Quadrant 6 in
150gAPI500
Borehole Corrected
PowerDrive RSS
Borehole Corrected
PowerDrive RSS
Horizontal scale
Average 6 in
Gamma RayGamma Ray Up
1 : 24.09
Quadrant 6 in
Static linear
100gAPI500
150gAPI500
normalization
4,180
4,190
PD_GRAVPD_GRUP
Gamma ray
image static
4,200
4,210
4,220
PD_GRUP
4,230
4,240
4,250
4,260
Dynamic near-bit gamma ray measurements helped Sinopec make real-time geosteering deci-
sions and position the wellbores within the thin pay zone.
Drilling
CASE STUDY: PowerDrive Archer RSS delivers steering 100% within narrow pay zone
Maintained drilling trajectory 100% within pay zone for two lateral wells
By taking real-time measurements at the bit, the PowerDrive Archer high build rate RSS enabled Sinopec to reduce structural uncertainties and drill
a total of 2,790 m [9,153.5 ft] within the challenging, 3-m-thick pay zone. In fact, the directional drilling team successfully placed both laterals in the zone
of interest with 100% accuracy—optimizing reservoir contact and net pay.
Additionally, the unique hybrid steering action of the PowerDrive Archer RSS provided maximum dogleg severity (DLS) control, ensuring accurate well
trajectory while minimizing the risk of dogleg complications, such as casing wear, drillstring friction, or stuck pipe. Throughout the drilling campaign,
the RSS delivered a maximum DLS of just 3°/30 m, enabling a smooth casing run and avoiding nonproductive time associated with excessive,
unplanned doglegs.
Absent value
278.23
310.48
342.74
375
407.26
439.52
471.77
U
L
D
R
U
G
a
m
m
a
r
a
y
i
m
a
g
e
4
5
0
G
R
_
A
V
_
F
M
M
o
d
e
l
e
d
4
5
0
5
0
2
0
1
0
0
P
D
G
R
D
N
_
B
H
C
T
G
0
P
D
G
R
A
Y
_
B
H
C
G
a
m
m
a
r
a
y
P
D
G
R
U
P
_
B
H
C
A
z
i
m
u
t
h
G
a
m
m
a
r
a
y
T
G
&
T
O
C
P
D
I
N
C
L
6
0
0
R
O
P
5
T
O
C
0
5
0
1
0
0
9
0
1
0
4
5
0
1
0
0
4
5
0
2,850
3,900
3,950
T
V
D
,
m
2,900
TVDSS, m
2,950
3,000
3,050
3,100
6,0001,1001,2001,3001,400
1,500
THL, m
1,6001,7001,8001,9002,0002,1002,200
4,000
4,050
4,100
4,150
The geosteering model (above) illustrates how imaging enabled the drilling team to stay within the very thin reservoir.
/powerdrivearcher
*Mark of Schlumberger
Other company, product, and service names
are the properties of their respective owners.
Copyright © 2018 Schlumberger. All rights reserved. 17-DR-359391
2024年7月31日发(作者：符悦爱)
CASE STUDY
Sinopec Uses PowerDrive Archer RSS with Near-Bit GR
Imaging to Steer Drilling 100% in Pay Zone, China
MWD and RSS technologies ensure accurate well placement in a thin shale reservoir
CHALLENGE
■
Maximize shale recovery potential while
drilling two horizontal exploration wells in
the Dingye field.
■
Distinguish between the gamma ray (GR)
responses of a thin reservoir that are similar
to the layers above and below.
SOLUTION
■
Use PowerDrive Archer* high build rate
rotary steerable system (RSS) with near-
bit gamma ray (GR) imaging to ensure
accurate wellbore placement within
a narrow pay zone.
RESULTS
■
Successfully drilled the 1,234-m
[4,048.56-ft] and 1,556-m [5,105-ft] target
lateral sections while maintaining 100%
reservoir contact.
Maximize net pay in narrow pay zone shale wells
After discovering Fuling field in 2012, China’s first commercial unconventional gas field, Sinopec began
an ambitious exploration drilling campaign in the nearby Dingye structure. In previous unconventional
wells, Sinopec used average GR to guide well trajectories. However, horizontal wells in Dingye field
showed similar GR response in the layers directly above and below the pay zone—which ranged
from just 2 to 3 m [2.5 to 9.8 ft] thick. To ensure optimal well placement and reduce uncertainty in
the planned 1,200–1,500-m lateral sections, Sinopec partnered with Schlumberger for directional
drilling services.
Deploy RSS with near-bit GR imaging to enable precise directional drilling
Schlumberger and Sinopec decided to incorporate the PowerDrive Archer high build rate RSS into
the bottomhole assembly. In addition to delivering a high rate of penetration and better wellbore
quality, the system’s built-in, near-bit azimuthal gamma ray measurement capabilities enable precise,
proactive geosteering in thin pay zones. Dynamic near-bit gamma ray images help identify structural dip
information, allowing the drilling team to make quick geosteering decisions and minimize the risk
of exiting the target.
Borehole Corrected
PowerDrive RSS
Gamma Ray Down
Quadrant 6 in
150gAPI500
Borehole Corrected
PowerDrive RSS
Borehole Corrected
PowerDrive RSS
Horizontal scale
Average 6 in
Gamma RayGamma Ray Up
1 : 24.09
Quadrant 6 in
Static linear
100gAPI500
150gAPI500
normalization
4,180
4,190
PD_GRAVPD_GRUP
Gamma ray
image static
4,200
4,210
4,220
PD_GRUP
4,230
4,240
4,250
4,260
Dynamic near-bit gamma ray measurements helped Sinopec make real-time geosteering deci-
sions and position the wellbores within the thin pay zone.
Drilling
CASE STUDY: PowerDrive Archer RSS delivers steering 100% within narrow pay zone
Maintained drilling trajectory 100% within pay zone for two lateral wells
By taking real-time measurements at the bit, the PowerDrive Archer high build rate RSS enabled Sinopec to reduce structural uncertainties and drill
a total of 2,790 m [9,153.5 ft] within the challenging, 3-m-thick pay zone. In fact, the directional drilling team successfully placed both laterals in the zone
of interest with 100% accuracy—optimizing reservoir contact and net pay.
Additionally, the unique hybrid steering action of the PowerDrive Archer RSS provided maximum dogleg severity (DLS) control, ensuring accurate well
trajectory while minimizing the risk of dogleg complications, such as casing wear, drillstring friction, or stuck pipe. Throughout the drilling campaign,
the RSS delivered a maximum DLS of just 3°/30 m, enabling a smooth casing run and avoiding nonproductive time associated with excessive,
unplanned doglegs.
Absent value
278.23
310.48
342.74
375
407.26
439.52
471.77
U
L
D
R
U
G
a
m
m
a
r
a
y
i
m
a
g
e
4
5
0
G
R
_
A
V
_
F
M
M
o
d
e
l
e
d
4
5
0
5
0
2
0
1
0
0
P
D
G
R
D
N
_
B
H
C
T
G
0
P
D
G
R
A
Y
_
B
H
C
G
a
m
m
a
r
a
y
P
D
G
R
U
P
_
B
H
C
A
z
i
m
u
t
h
G
a
m
m
a
r
a
y
T
G
&
T
O
C
P
D
I
N
C
L
6
0
0
R
O
P
5
T
O
C
0
5
0
1
0
0
9
0
1
0
4
5
0
1
0
0
4
5
0
2,850
3,900
3,950
T
V
D
,
m
2,900
TVDSS, m
2,950
3,000
3,050
3,100
6,0001,1001,2001,3001,400
1,500
THL, m
1,6001,7001,8001,9002,0002,1002,200
4,000
4,050
4,100
4,150
The geosteering model (above) illustrates how imaging enabled the drilling team to stay within the very thin reservoir.
/powerdrivearcher
*Mark of Schlumberger
Other company, product, and service names
are the properties of their respective owners.
Copyright © 2018 Schlumberger. All rights reserved. 17-DR-359391