DR - Res
Propagation Resistivity Tool

Specifications

DR-Res provides precise resistivity readings using electromagnetic waves that propagate at different frequencies. The resistivity of the surrounding formation can be detected with the attenuation and phase shift of the waves using the four depths of investigation.

 


ADVANTAGES

Four Depths of Investigation
Memory Recordable High-Resolution Logs
Real-Time Resistivity Updates
Fully Retrievable Probe, Reducing LIH Exposure
Modular Design for Adaptive Bit to Sensor Placement
Water and Oil-Based Mud Compatibility
Operates with Gamma, Directional, and Annular Pressure Modules Simultaneously in Real Time


APPLICATIONS

Bed Boundary Mapping
Logging While Tripping
Oil Water Contact Detection
Formation Correlation
Geo Steering
Pore Pressure Evaluation

RESISTIVITY RANGE AND PRECISION
RANGEPRECISION
2 MHz Phase Shift0.5 to 50 ohm-m±5%
50 to 1000 ohm-m±0.5 mS/m
400-kHz Phase Shift0.1 to 10 ohm-m±3%
10 to 500 ohm-m±2 mS/m
2-MHz Attenuation0.5 to 25 ohm-m±5%
25 to 50 ohm-m±2 mS/m
2-Mhz Attenuation0.1 to 5 ohm-m±5%
50 to 20 ohm-m±8 mS/m
RESISTIVITY DEPTH OF INVESTIGATION AND VERTICAL RESOLUTION
VERTICAL RESOLUTIONRADIUS OF INVESTIGATIONVERTICAL RESOLUTIONRADIUS OF INVESTIGATION
1 OHM-M1 OHM-M10 OHM-M10 OHM-M
2 MHz Phase Shift12 in (30.5 cm)18 in (45.5 cm)21 in (53.5 cm)28 in (71.0 cm)
400 kHz Phase Shift16 in (40.5 cm)24 in (62.5 cm) 28 in (71.0 cm)37 in (94.0 cm)
2 MHz Attenuation22 in (56.0 cm)30 in (72.75 cm)40 in (102.0 cm)48 in (122.0 cm)
400 kHz Attenuation33 in (84.0 cm)41 in (104.5 cm)58 in (147.0 cm)76 in (193.0 cm)
OPERATING PARAMETERS
Nominal Tool O.D.3.75 in, 4.75 in, 6.5 in, and 8 in
Tool Length138.31 in (3.513 m)
Max Dogleg15 deg/30 m
Max Operating Temperature150°C
Max Operating Pressure20,000 psi
Max Sand Content0.5%

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