sonicVision

sonicVISIONReal-time LWD sonic for advanced drilling optimization and formation evaluation

5 Mud Weight Window (lbm/gal) 25

Taking advantage of the TeleScope* high-speed telemetry-while-drilling service, the sonicVISION* sonic-while-drilling tool delivers full slowness time (ST) projections to surface. This technology offers you real-time compressional (DTc) and shear (DTs) measurements with a full slowness projection log delivered

while drilling at the rig site or to remote offices through an interface with the InterACT* connectivity, collaboration, and information system.

The sonicVISION tool improves real-time measurements with

a real-time projection log

real-time surface labeling capability

pumps-off station measurements

wideband receivers

wideband freqency and high-power transmitter

additional downlinks for full parameterization of downhole acquisition parameters while drilling.

Robust, real-time sonicVISION velocity measurements enable safe, efficient drilling in hole sizes up to 30 in with 634-, 814-, and 9-in collars.

The sonicVISION sonic-while-drilling tool sets high performance standards, with hardware and software advances that enhance real-time log quality and add functionality to give operators confidence while making critical well decisions. Building on more than a decade

Providing full slowness time projections to surface

Robust, real-time velocity measurements in hole sizes up to 30 in make

it possible to drill with confidence

sonicVISIONREAL-TIME APPLICATIONS

Pore-pressure trends Borehole stability assessment Bit-on-seismic positioning Rock strength and other

mechanical information Formation gas and gas influx

detection Drilling optimization Porosity determination Top-of-cement identification

1

Providing full slowness time projections to surface

Delivering robust, real-time interval transit time data for compressional, shear, and Stoneley waves

of Schlumberger experience with sonic LWD technology, the sonicVISION tool delivers robust, real-time interval transit time data for compressional waves and shear waves in fast formations, and Stoneley, if required.

MEASUREMENT QUALITY

Acquisition parameters are set at the surface before the sonicVISION tool is run in the hole. Downhole parameters can be modified while drilling by limiting interaction. QC data, transmitted to the surface independently of the downhole parameters, can be used to relabel the sonic data and guarantee its reliability.

Additional QC is performed using automatic station measurements made during connections. In this noise-free environment, the tool is able to take a station measurement that is then sent uphole when pumping is resumed for further QC of real-time data.

The sonicVISION tools wideband frequency measurements reduce aliasing and eccentralization effects, improve formation signal strength, and allow measurement of shear waves in fast formations. Large amounts of wideband power from the transmitter effectively couple more energy into various formation types, ultimately improving the signal-to-noise ratio and, therefore, measurement quality and hole-size range.

2

3

1. Wideband frequency and high-power transmitter generate a reliable acoustic response from both soft and hard formations.

2. Optimized attenuation section improves signal-to-noise ratio.

3. Wideband acoustic signals are acquired by four azimuthal receivers.

500

1,000

1,500

1,500 2,000 2,500

Vp, m/s

10 15 20

Pore-pressure gradient, lbm/galUS

3,000

2,000

2,500

3,000

Dep

th, m

1

500

1,000

1,500

1,500 2,000 2,500

Vp, m/s

10 15 20


3,000

2,000

2,500

3,000

Dep

th, m

Sonic

Mud weights

3

500

1,000

1,500

1,500 2,000 2,500Vp, m/s

10 15 20Pore-pressure gradient, lbm/galUS

3,000

2,000

2,500

3,000

Dep

th, m

Sonic

2

500

1,000

1,500

1,500 2,000 2,500

Vp, m/s

10 15 20


3,000

2,000

2,500

3,000

Dep

th, m

Sonic

Mud weights

Pore-pressuredata

4

Pore-pressure monitoring workflow uses sonicVISION compressional-velocity (Vp) data to reduce uncertainties and update the pore-pressure trend.

RELIABILITY AND FUNCTIONALITY

Extended battery life, large memory capacity, and fast dump speed significantly enhance the sonicVISION tools reliability and functionality. Standard memory life is 12 days at 180 ft/h (10-s acquisition). In addition, standardized planning software allows the engineer to easily optimize the tool configuration for the well being drilled.

DRILLING APPLICATIONS

Measurements acquired by the sonicVISION tool can significantly reduce risks and costs by providing critical formation data in uncertain drilling environments. This reliable real-time sonic data is used in managing many drilling concerns, including

optimization of mud weight selection

pore-pressure monitoring independent of formation temperature and salinity effect

borehole stability prediction

top-of-cement identification

understanding of rock mechanical properties

sourceless porosity measurement

bit positioning on seismic using synthetics

gas influxes or formation gas identification.

DRILLING SAFETY AND EFFICIENCY

Velocity is one of the best indicators of pore-pressure change because of its independence from temperature and salinity effects. A slowing of velocity indicates that a pressure ramp is being entered. Used alone or coupled with rock mechanical properties, velocity makes a powerful tool for enhancing drilling safety and efficiency.

Proprietary Schlumberger software turns quality sonicVISION log information and other LWD measurements into drilling answers. A typical output is an optimal mud-weight window versus depth.

Real-time compressional and shear data provided by the sonicVISION tool enables geomechanical calculations that reduce pore-pressure uncertainties independent of formation temperature and salinity effect and, thus, improve mud weight selection and allow casing programs to be optimized for drilling safely and efficiently.

LARGE-HOLE RESPONSE

The sonicVISION tool is available in 634-, 814-, and 9-in collar sizes. It has been run successfully in hole sizes up to 30 in, using model-based processing when compressional wave is slow (leaky-P).

SONIC FOR SEISMIC CORRELATION

The accuracy and extended QC of sonicVISION measurements make synthetic seismograms even more robust for improved identification of bit position on the seismic map. The use of time-depth-velocity information acquired by the seismicVISION* seismic-while-drilling service to calibrate the raw sonic velocities offers a unique solution for optimal conciliation between surface seismic and borehole seismic information while drilling. Combining sonicVISION measurements with shear measurements provides quantitative information for AVO analysis, as well as for fluid-independent pore-pressure estimation.

Synthetic seismogram workflow uses sonicVISION slowness for bit-on-seismic positioning.

SonicslownessDensity

Acousticimpedance Reflectivity Wavelet

Syntheticseismogram

Time

seismicVISION corridor stack sonicVISION syntheticcalibrated in real timeSurface seismic Wireline synthetic

Real-time sonicVISION synthetic seismogram allows real-time bit-on-seismic positioning.

FORMATION EVALUATION APPLICATIONS

The many formation evaluation applications for sonicVISION data include

compressional speed/shear wave speed (Vp/Vs) ratio determination in fast formations

porosity measurement without a radioactive source

complex lithology identification

light-hydrocarbon detection.

Robust surface-labeled shear measurements can be used quantitatively for assessing rock mechanics, for sanding analysis in production and fracture design, and for gas detection.

In geological and geophysical applications, the sonicVISION tool provides information about the amount of connected porosity without using radioactive sources. This is particularly advantageous in carbonate reservoirs because the sonicVISION tool responds only to interconnected porositynot to vuggy porosity. Used alone or with other LWD porosity measurements, such as those made by the adnVISION* azimuthal density neutron tool or the proVISION* real-time reservoir steering service, the sonicVISION porosity measurement can greatly increase reservoir understanding.

Using sonicVISION measurements to update the predrilling velocity- to-pressure transform and measuring the true formation pressure with the StethoScope* formation pressure-while-drilling service reduces pressure-prediction model uncertainty. This enables an operator to extend casing depths and eliminate an entire casing section, significantly reducing well costs.

Real-time projection from the InterACT system provides QC and confidence in sonicVISION data.

These sonicVISION measurements were made in a 20-in borehole drilled with oil-base mud.

Real-time projection, station measurement, and QC log from sonicVISION tool (right) demonstrate that the quality of real-time images matches that of sonicVISION memory data (left).

Array Resistivity Compensated Gamma Ray (Uncorrected)

ROP Averaged Over Last 5 ft

Delta-T Compressional (Computed Uphole), Real-Time

Delta-T Compressional, Real-Time

Slowness Projection


0 gAPI 150

0 ft/h 500

40 us/ft 240 40 us/ft 240

40 us/ft 240

Compressional Coherence (Computed Uphole), Real-Time

0 1

Array Resistivity Compensated Gamma Ray (Uncorrected)

ROP Averaged Over Last 5 ft



Slowness Projection


0 gAPI 150

0 ft/h 500

40 us/ft 240 40 us/ft 240

40 us/ft 240

Compressional Coherence (Computed Uphole), Real-Time

0 1

Delta-T Compressional from

Receiver Array

us/ft40 240

us/ft

AmplitudeMin. Max.

0 1Slowness Time Projection,

Receiver Array

40 240

Delta-T Shear fromReceiver Array

us/ft40 240

2,300

Compressional Minimum and Maximum Labeling Slowness,

Real-Time

us/ft40 240

Shear Minimum and Maximum Labeling Slowness, Real-Time

us/ft40 240

Delta-T Peak 1 Compressional (Computed Uphole), Real-Time

us/ft40 240

us/ft

AmplitudeMin. Max.

0

40 240

1Slowness Projection

2,400station measurement

us/ft

Delta-T Compressional from Receiver Array

us/ft40 240

AmplitudeMin. Max.

Slowness Time Projection,Receiver Array

40 240

0 1

X,550

X,600

X,500

Specifications sonicVISION 675 sonicVISION 825 sonicVISION 900

Nominal OD, in [mm] 6.9 [175.26] 8.4 [213.36] 9.187 [233.35]

Max. tool OD (incl. wear bands), in [mm] 7.5 [190.5] 9.13 [231.9] 10.0 [254.0] Fishing stub length, in [mm] 55 [1,397] (for new collar) 52 [1,321] (for new collar) 52 [1,321] (for new collar) Hole size, in [mm] 8 [216] to 1058 [270] 1058 [270] to 22 [559] 12 [311] to 30 [762] Length, ft [m] 23.8 [7.254] 22.6 [6.888] 22.6 [6.888]Tool mass (in air), lbm [kg] 2,500 [1,134] 3,400 [1,542] 4,240 [1,923] Connection API 512 FH box box API 658 FH box box API 758 H90 box boxMakeup torque, ft.lbf [N.m] 25,000 [33,895] 41,000 [55,589] 76,000 [103,042] Max. rotary torque, ft.lbf [N.m] 16,000 [21,693] 23,000 [31,184] 51,000 [69,147] Max. torque (pin yield), ft.lbf [N.m] 42,700 [57,893] 67,000 [90,840] 120,000 [162,698] Max. dogleg severity

Rotating, /ft [/m] 8/100 [8/30] 6/100 [6/30] 4/100 [4/30] Sliding, /ft [/m] 16/100 [16/30] 14/100 [14/30] 12/100 [12/30]

Max. operating temperature, degF [degC] 302 [150] 302 [150] 302 [150]Max. operating pressure, psi [MPa] 25,000 [172.369] 25,000 [172.369] 25,000 [172.369] Max. differential pressure, psi [MPa] 5,000 [34.474] 5,000 [34.474] 5,000 [34.474] Max. flow rate, galUS/min [L/min] 800 [3,028] 1,200 [4,542] 1,400 [5,300] Max. sand content, % 3 3 3Max. LCM size, in [mm] 0.63 [16] 1 [25.4] 1 [25.4] Pressure drop, psi (mud weight (lbm/galUS)

(flow rate2 (galUS/min)2)

256,000

(mud weight (lbm/galUS) (flow rate2 (galUS/min)2)

750,000

(mud weight (lbm/galUS) (flow rate2 (galUS/min)2)

750,000Equivalent bending stiffness, ft [m] 35 (6.50-in OD and 2.81-in ID) 32 (8.00-in OD and 2.81-in ID) 27 (9.00-in OD and 2.81-in ID)Bending strength ratio 2 2.2 2.15Average inertia, in4 62 140 270Max. jarring load, lbm [kg] 330,000 [149,685] 500,000 [226,796] 650,000 [294,835] Max. tensile load, lbm [kg] 330,000 [149,685] 500,000 [226,796] 650,000 [294,835] Max. WOB, lbm [kg] 57,000,000

L2128,000,000

L2 247,000,000

L2(where L is the distance between stabilizers in ft)

Max. WOB (not from buckling), lbf [N] 100,000 [444,822] 140,000 [622,751] 200,000 [889,644] Max. shock (electronics) 250 g for 100,000 cycles 250 g for 100,000 cycles 250 g for 100,000 cyclesMeasure point from tool bottom, ft [m] 14 [4.267] 13.5 [4.115] 13.5 [4.115]

Measurements

Compressional wave transit time Real time and memory Real time and memory Real time and memoryShear wave transit time (fast formation) Real time and memory Real time and memory Real time and memoryCompressional wave transit time (pumps off) Real time and memory Real time and memory Real time and memoryAccuracy, us/ft [us/0.305 m] 1 1 1Measurement range All tools 40230 us/ft dependent on mud type

Transmitter-receiver spacing, ft [m] 10 [3.048] 10 [3.048] 10 [3.048] Acoustic aperture, ft [m] 2 [0.610] 2 [0.610] 2 [0.610] Max. recording rate

Real time and memory (6-in [152.4-mm] sampling at 180 ft/h [54.864 m/h]), s

10 10 10

Memory only (6-in [152.4-mm] sampling at 180 ft/hr [54.864 m/h]), s

1 1 1

Memory capacity 6 days at 10-s record rate or 12 days at 10-s rate for dual memory toolsPower supply Battery and turbine Battery and turbine Battery and turbineCollar attenuator efficiency, dB 60 60 60Dump time (memory full), min 10 10 10 American Petroleum Institute (API) specification Lost circulation material Weight on bit Measurement range: water-base mud 40170 us/ft [40170 us/0.305 m]; oil-base mud 40200 us/ft [40200 us/0.305 m]; and synthetic oil-base mud 40230 us/ft [40230 us/ 0.305 m]

sonicVISIONSONIC-WHILE-DRILLING SERVICE

Stick Slip Indicator, Real-Time

c/min

c/min

14,010

14,020

14,030

14,040

14,050

14,060

14,070

14,080

14,750

14,760

14,770

14,780

14,790

14,800

14,810

14,820

14,830

14,840

CollarRotational Speed,

Real-Time 16-in Spacing at 2 MHz

22-in Spacing at 2 MHz

Array Resistivity Compensated (ARC)

Attenuation Resistivity, Environmentally

Corrected, Real-Time

28-in Spacing at 2 MHz

Bulk Density Average, Real-Time,

Computed Downhole

Axial (X-Axis) RMS

Vibration, Real-Time, Computed Downhole

Density Caliper, Vertical, Real-Time, Computed Downhole

Coherence at Compressional Peak (Computed Uphole),

Real-Time

Maximum Labeling Slowness, Compressional

Minimum Labeling Slowness, Compressional



Slowness Projection

Downhole Annulus Pressure, Real-Time, Computed Downhole

Downhole Annulus Temperature, Real-Time,

Computed Downhole

Equivalent Circulating Density, Real-Time

Gamma Ray, Average, Real-Time, Computed Downhole

Density Image from Sector (Top of Hole), Computed Downhole

Coherence at Compressional Peak,

Real-Time


Delta-T Compressional (Computed Uphole),

Real-Time

Density Caliper, Average, Real-Time, Computed Downhole

Density Caliper, Horizontal, Real-Time, Computed Downhole Transverse

(Lateral) RMS

Vibration, Real-Time, Computed Downhole

Thermal Neutron Porosity, Average, Real-Time

0.2 ohm.m 200 45 % -15

1.95 g/cm3 2.95

0 ft/s2 200

0 ft/s2 300

8 in 12

8 in 12-1 1

-1 1

40 us/ft 140100 degF 300

5,000 psi 10,000

0 gAPI 150

40 us/ft 240

40 us/ft 240

40 us/ft 240

40 us/ft 240

12 lbm/galUS 1640 us/ft 1408 in 12

0.2 ohm.m 200

0.2 ohm.m 2000 300

0 300ROP Averaged Over Last 5 ft

250 ft/h 0

Gamma Ray, Average, Real-Time, Computed Downhole

0 gAPI 150 sonicVISION

www.slb.com/vision

*Mark of SchlumbergerOther company, product, and service names are the properties of their respective owners.Copyright 2010 Schlumberger. All rights reserved. 09-DR-0319

Higher confidence from unique real-time QC

Reduced drilling risk and cost More effective mud program

management Accurate seismic positioning Hole sizes from 812 to 30 in Available with up to 25,000-psi

maximum pressure

Wired drillpipe telemetry enhances sonicVISION real-time data quality and provides interactive communication with the downhole tool using transparent downlinks.

Documents

sonicVision