powerflex and powerecho brochure brochure
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PowerFlex PowerEchoAnnular barrier evaluation services
01
Powering Well IntegrityReliable barrier evaluation for assuring well integrity
02
Assuring the integrity of the well—from well construction to abandonment—is critical to preventing damage to people, the environment, and assets. Catastrophic incidents attributed to the failure of well integrity are the global driver for improving in the installation and evaluation of barriers.
Barrier evaluation must be robust, reliable, and timely in all possible conditions. Only then can it fulfill its critical role in decisions that mitigate risks in current well operations—and help improve barrier installation and performance in the next well.
PowerFlex* annular barrier evaluation service delivers the most comprehensive and reliable evaluation of pipe and cement sheath behavior in the industry.
PowerEcho* annular barrier evaluation service is a targeted approach for wells with less‑complex completions.
Powering Performance
03
PowerFlex service—a powerful combinationBy simultaneously acquiring ultrasonic pulse-echo measurements and flexural wave imaging, PowerFlex service provides a high-resolution map of pipe thickness and cement with full azimuthal coverage. The measurement of third-interface echoes (TIEs) by PowerFlex service uniquely images the outer wall for pipe standoff. This innovative combination of measurements enables precise, reliable evaluation of all cement types and weights, particularly for identifying and qualifying debonded cement, and excels at barite sag evaluation.
PowerEcho service—a single straightforward measurementFor more conventionally constructed wells—but also performing in all cement types and weights— PowerEcho service delivers a high-resolution map of pipe thickness and cement from its powerful pulse-echo measurement.
Casing sizes
4½ to 22 in
Any cement Ultralight to heavyweight
slurries
All mud weights
Up to 19 ppg
Casing wall thickness
0.18 to 1 in
With new transducer technology and innovative processing software and firmware, PowerFlex and PowerEcho services deliver high‑resolution information where conventional technology cannot perform.
20×more powerful
04
Use PowerFlex annular barrier evaluation service when you need the industry’s best wellsite answers, available within 2 hours of pulling out of hole.
Powering Drilling DecisionsEvaluate and take action
■ Reduce evaluation uncertainty ■ Increase confidence in decisions ■ Cut logging time up to 50% ■ Simultaneously conduct casing inspection
and cement evaluation ■ Monitor drill wear and evaluate burst pressure ■ Eliminate fluid swapping before logging
Superior acquisition efficiency reduced logging time by 12 hours.
PowerFlex service simultaneously evaluated cement and drill wear for four liner sizes in a single decent at doubled logging speeds that saved 12 hours on a deepwater drillship.
O�shore Operation
Time, h
Superior data reduced logging time by 12 hours.
Legacy
EchoFlex
12 hours savedPowerFlex service
Conventional tool
12 hours saved
05
6,500
135⁄8
117⁄8
75⁄8
97⁄8
7,500
8,500
9,500
10,500
11,500
12,500
13,500
14,500
15,500
16,500
17,500
18,500
19,500
Well SchematicCasingZones
Depth, ft Gamma Ray
0 gAPI 6
Discriminated Borehole-Compensated
Attenuation
10 dB/ft 0
Internal Radius Maximum, 1-ft Median
6 in 6.5
Internal Radii Corrected for Eccentering Minus Internal
Radius Average (IRBK)
–0.16 in 0.39
Cement Acoustic Impedance
–0.3.9 in 30
Image Orientation, °
0 90 180 270 360
U R D L U Image Orientation, °
0 90 180 270 360
U R D L U
Internal Radius Average, 1-ft Median
6 in 6.5
Cement Acoustic Impedance Average,
3-ft Median
0 Mrayl 10
Internal Radius Minimum, 1-ft Median
6 in 6.5
Thickness Maximum Value, 1-ft Median
0.3 in 0.8
Casing Thickness Minus Thickness Average Value
(THBK)
–0.63 in 0.15
Flexural Attenuation
0 dB/m 1.5e+34
Thickness Average Value, 1-ft Median
0.3 in 0.8
Flexural Attenuation
10 dB/m 110
Thickness Minimum Value, 1-ft Median
0.3 in 0.8Variable Density*
Log (VDL)VDL Radii
200 1,200
IRBK
–1,000 0.08 THBK
–1,000 0.08
0 100
0 8
Run PowerFlex or PowerEcho service to conduct a comprehensive analysis for cementing diagnosis and improvement.
Powering Cementing DecisionsConfirm and improve
■ Reliable visualization of the cement to confirm ● azimuthal placement of cement ● adequate pipe centralization ● absence of channels
■ Information to improve the next well’s ● cement placement ● cement quality ● pipe centralization
PowerFlex service delivers high-quality cement maps—even in difficult environments of heavy mud, thick and large casings, and light cement—and valuable information on pipe standoff and its effect on cement placement.
06
3,750
3,760
3,770
3,780
3,790
3,800
3,810
3,820
3,830
3,840
3,850
Depth, m
Gamma Rayand CasingCollar Log
Acoustic Impedance
and Map
Acoustic Amplitudeand Map
EqualizedFlexural
Attenuation
TIE Annular
Thickness
TIE Velocity
Solid-Liquid-Gas Map
TIE Variable Density* Log (VDL), 0–180°
TIE VDL, 90°–270° CasingCentralization
Ultrasonic Casing
Collar Log
–25 in 5
AverageWave
Amplitude
0 db 70
Average Cement
Acoustic Impedance
0 Mrayl 8
MaximumWave
Amplitude
–6 db 0.5
–6 0.5 0 8 34.36 125.58 0 2.00
0 64
Gamma Ray
0 gAPI 75
AverageFlexural
Attenuation
40 db/m 90
AverageTIE AnnularThickness
0 in 3
Ultrasonic Casing Caliper
0 % 100
TIE Velocity
1,200 m/s 2,200
Solid-Liquid-Gas TIE Relative Bearing VDL TIE Relative-Bearing VDL
Cement Acoustic
Impedance
0 Mrayl 8
TIE AnnularThickness
0 in 2
FlexuralAttenuation
Casi
ng c
entr
aliz
ers
No
cent
raliz
ers
Cent
raliz
ers
U R D L U0 90 180 270 360
Image Orientation, º
Pulse Echo Relative Bearing–1 us 68
Liquid channel
Casing centralization percentage
Low side of borehole
TIE cement velocity close to expected value and slowness from ultrasonic cement analyzer
9 / -in casing 85
Powering Interpretation Decisions
Where conventional processing is limited by incomplete knowledge of mud properties, PowerFlex and PowerEcho services’ novel inversion-based processing eliminates the need for mud information to deliver reliable mud and cement answers.
Comprehensively evaluate both the cement sheath and pipe condition with novel processing, visualization, and interpretation workflows in the Techlog* wellbore software platform. Detailed and reliable diagnosis of cement and pipe behavior informs decisions across the life of the well, from drilling through abandonment.
Diagnose and understand ■ Integrated cement evaluation with
Invizion* well integrity services ■ Pipe standoff and casing contact points ■ Microannulus diagnosis ■ Leak path analysis ■ Pipe inspection for burst and collapse conditions ■ Barite sag evaluation ■ Trapped gas in the annulus
07
8
6
4
2
0
Mra
yl8
6
4
2
0
Mra
yl
2.5
2
1.5
1
0.5
0
Mra
yl
Conventional technology PowerFlex and PowerEcho services
Cement Acoustic impedance
Cement Acoustic impedance
Mud Acoustic impedance
Clearly understand annulus hazards and behavior prior to abandonment, especially in older wells where critical information is unavailable. Without this informed basis, pipe retrieval and barrier removal or placement can default to time‑consuming and costly trial and error.
Powering Abandonment DecisionsIlluminate and optimize
■ Evaluation to optimize casing retrieval ● intervals of barite sag ● pipe standoff behavior for precisely placed
cut decisions and contact points ■ Understanding of the annular condition to improve
the operational safety of barrier retrieval or placement ● identify trapped gas ● evaluate casing cement ● diagnose formation creep ● evaluate pipe condition prior to retrieval ● confirm presence or absence of channels
■ Abandonment process improvement ● cement placement quality ● interval selection for barrier placement
PowerFlex service’s 3D TIE output provides a clear image for P&A casing cutting operations of the perfectly centralized inner (gray) and outer (red) casings.
08
Measurement Specifications
Output Acoustic impedance, cement bond to casing, flexural attenuation, Variable Density* log (VDL) of annulus waveform, solid‑liquid‑gas map of annulus material, hydraulic communication map, casing rugosity image, internal radius image, casing thickness image
Logging speed,† ft/h [m/h] 400 to 4,500 [122 to 1,372]
Depth of investigation, in [cm] Casing and annulus: 3 [7.62]
Horizontal resolution, ° 5 or 10
Vertical resolution, in [cm] 0.6 to 6.0 [1.52 to 15.24]
Casing thickness
Range, in [cm] 0.18 to 1.0 [0.45 to 2.54]
Accuracy, % ±2
Resolution, in [cm] 0.002 [0.005]
Acoustic impedance
Range, Mrayl 0 to 10
Accuracy, Mrayl <3.3 Mrayl: ±0.5, >3.3 Mrayl: ±15%
Resolution, Mrayl ±0.2
Flexural attenuation
Range, dB/m 0 to 200
Accuracy, dB/m 5
Resolution, dB/m 1
Mud type or weight limitations‡ All types including weights up to 19 ppg
Combinability Bottom only, combinable with most wireline tools† Some combinations may reduce logging speed, which is also resolution dependent.‡ Consult planning software to model the logging scenario.
Mechanical Specifications
Temperature, degF [degC] 350 [177]
Pressure,† psi [MPa] 20,000 [138]
Casing size—min., in [cm] 4½ Min. ID: 4 [10.16]
Casing size—max., in 16‡
Outside diameter,§ in [cm] 33/8 [8.57]
Length,§ ft [m] 14.58 [4.44]
Weight,§ lbm [kg] 299 [135.6]† High‑pressure versions available.‡ Successfully logged in 185/8‑in casing in certain nonattenuative mud conditions.§ Without rotating sub.
PowerFlex
PowerFlex service with sub option.
Measurement Specifications
Output Acoustic impedance, cement bond to casing, rugosity image, internal radius, casing thickness
Logging speed,† ft/h [m/h] 600 to 13,000 [183 to 3,962]
Depth of investigation Casing‑to‑cement interface
Horizontal resolution, ° 5 or 10
Vertical resolution, in [cm] 0.6 to 6.0 [1.52 to 15.24]
Casing thickness
Range, in [cm] 0.18 to 1.0 [0.45 to 2.54]
Accuracy, % ±2
Resolution, in [cm] 0.002 [0.005]
Acoustic impedance
Range, Mrayl 0 to 10
Accuracy, Mrayl <3.3 Mrayl: ±0.5, >3.3 Mrayl: ±15%
Resolution, Mrayl ±0.2
Flexural attenuation
Range, dB/m Not available
Accuracy, dB/m Not available
Resolution, dB/m Not available
Mud type or weight limitations‡ All types including weights up to 19 ppg
Combinability Bottom only, combinable with most wireline tools† Some combinations may reduce logging speed, which is also resolution dependent.‡ Consult planning software to model the logging scenario.
Mechanical Specifications
Temperature, degF [degC] 350 [177]
Pressure,† psi [MPa] 20,000 [138]
Casing size—min., in [cm] 4½ Min. ID: 4 [10.16]
Casing size—max., in 22
Outside diameter,‡ in [cm] 33/8 [8.57]
Length,‡ ft [m] 14.58 [4.44]
Weight,‡ lbm [kg] 299 [135.6]† High‑pressure versions available.‡ Without rotating sub.
PowerEcho
PowerEcho service with sub option.
*Mark of Schlumberger. Copyright © 2021 Schlumberger. All rights reserved. 21-RPIN-1064537
For more information and to read case studies, visit
slb.com/Power
PowerFlex | PowerEcho
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