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MWD/LWD

LWDSystem—Azimuthal Density AZDTM

and Thermal Neutron Porosity TNP TM

Sensors

The AZD and TNP sensors offer density and neutron

porosity logging-while-drilling measurements at

penetration rates up to 400 ft/hr with the precision

and accuracy of equivalent wireline tools.

© 2006–2009 Weatherford. All rights reserved. 2969.05

Weatherford International Ltd.

515 Post Oak Blvd., Suite 600

Houston, Texas 77027 USA

Tel: 713-693-4000

weatherford.com

System

• Rated up to 30,000 psi (206,843 kPa) operatingpressure, depending on tool size.

• Wireline accuracy at drilling rates up to 400 ft/hr.

• Combinable with the Multi-Frequency Resistivity (MFR™)sensor and the Hostile Environment Logging (HEL™)MWD system.

TNP Sensor

• Multi-detector design, optimized for each tool size,provides exceptional statistical precision equivalent toa wireline measurement at drilling rates up to 400 ft/hr.

• Optimized He3 detector spacings result in a high-precisionmeasurement with reduced environmental effects.

• Multiple detectors at each spacing provide redundancyfor increased log quality and deliverability.

AZD Sensor

• Optimized design results in measurements less affectedby standoff and improved spine and rib corrections.

• Digital electronics allow 50-ms sampling for accurate

standoff correction of both density and neutronmeasurements.

• Patented rotational correction technique correctsfor excessive standoff and provides a boreholecaliper measurement.

• Sixteen-sector azimuthal binning provides boreholeimaging and real-time geosteering, as well as accuratedensity logs, even in enlarged boreholes.

Features, Advantages and Benefits

He3 detectors

Source

Source

TNP 18.6 ft(5.7 m)

AZD 10.7 ft(3.3 m)

Near detector

Far detector



MWD/LWD

LWD System—Azimuthal Density AZDTM


Sensors

Weatherford International Ltd.515 Post Oak Blvd., Suite 600


Tel: 713-693-4000

weatherford.com

© 2006–2009 Weatherford. All rights reserved. 2969.05

Specifications

Nominal Tool OD (in.) 4-3/4 in. 6-3/4 in. 8-1/4 in.

Maximum collar OD (in.) 5-1/4 7-3/8 9-1/2

Length (ft) 18.6 22.5 22.8

Weight (lb) 1,225 2,425 5,150

Top connection 3 1/2-in. IF box 4 1/2-in. IF box 5 1/2-in. IF box

Bottom connection 3 1/2-in. IF pin 4 1/2-in. IF pin 5 1/2-in. IF pin

Stabilizer blade diameter (in.) 5-7/8 8-1/4 12

Target hole size (in.) 6-1/8 8-1/2 12-1/4

Makeup torque (ft-lb) 9,900 to 10,900 28,000 to 32,000 53,000 to 56,000

Maximum torque (ft-lb) 16,700 44,700 80,100

Maximum tension (lb) 528,000 978,000 1,450,000

Bending strength ratio 2:10 2:53 2:47

Dogleg severity, rotating 20°/100 ft 11°/100 ft 9°/100 ftDogleg severity, sliding 36°/100 ft 19°/100 ft 15°/100 ft

Equivalent bending stiffness 4.75 3.18 6.75 4.39 8.25 4.28(OD ID, in.)

Maximum operating329° (165°) 329° (165°) 329 (165°)

temperature (°F/°C )

Maximum operating30,000 30,000 25,000

pressure (psi/kPa) (206,843) (206,843) (172,369)Maximum flow rate (gal/min) 400 800 1,800

Maximum sand content 2% 2% 2%

Measurement Accuracy Repeatability

Density 1.7 to 3.05 g/cm3 ± .0075g/cm3

± 0.015 g/cm3 at 2.4 g/cm3

Neutron porosity 0 to 10 p.u. ± 0.5 p.u. ± 0.75 p.u.10 to 40 p.u. ± 5% at 20 p.u.

Pe 1 to 10 B/e ± 5% ± 0.25 at 3 B/e

Azimuthal Binning

• Borehole imaging

• Real-time geosteering

• Borehole stability• Structural dip

• Accurate density in enlarged holes

AZD/TNP Tool Mechanical Specifications

AZD/TNP Sensor Specifications



MWD/LWD

Weatherford International Ltd.515 Post Oak Blvd., Suite 600


Tel: 713-693-4000

weatherford.com

Weatherford products and services are subject to the Company’s standard terms and conditions, available on request

or at weatherford.com. For more information contact an authorized Weatherford representative. Unless noted

otherwise, trademarks and service marks herein are the property of Weatherford. Specifications are subject to change

without notice. Weatherford sells its products and services in accordance with the terms and conditions set forth in the

applicable contract between Weatherford and the client.© 2006–20090 Weatherford. All rights reserved. 2969.05

LWD and wireline comparison, Eocene shaly sands. This well was drilled using a 13.1-lb/gal oil-based mud and a

6 1/8-in. bit. The superior bed resolution of the 2-MHz, 46-in. phase resistivity (LWD_RPD2) compared to the wireline

ILD in Track 2 is highlighted by yellow shading. The LWD neutron porosity and bulk density closely correlate with

wireline logs in the shale section but differ in hydrocarbon zones. LWD nuclear logs are less affected by invasion

than wireline logs, as shown in the highlighted Eocene shaly-sand gas zone at 6,435 ft. The LWD logs were acquired

one hour after drilling, and the wireline logs were acquired three days after drilling.

ROP

WL CALI

GR

Wireline LWD

f N f N

r b r b

LWD System—Azimuthal Density AZDTM


Sensors

Documents

Wftcnl Tnp