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The Compensated
Wave Resistivity Gamma MultiLink (CWRGM™) tool
is one component of the PathFinderSM LWD MultiLink system.
Features
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- 2-MHz Compensated Wave Resistivity log
- API-calibrated Natural Gamma Ray log
- High-speed mud-pulse telemetry for Pay Zone Steering
applications and decision making
- Backup batteries in tool assembly that allow tool
operation in the absence of turbine power
- Turbine power for long downhole life
- Flexible modular architecture for stacking PathFinder
tools in any order to meet job needs
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Data
Storage |
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- High-capacity nonvolatile memory. At a drilling
rate of 200 ft/hr, the tool can store over 200 hours
of log data at two samples per foot.
- Fast data acquisition mode for logging-while-tripping
without mud circulation. At a pulling speed of 90
ft/min, the tool can store data at 1.5-ft intervals.
- High-speed log memory dump minimizes rig time spent
downloading data.
- Memory data acquisition rate is downhole programmable
in 1 to 100-second intervals.
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Resistivity
Sensors |
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- Applications include real-time invasion profiling
and Rt determination.
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- Dual-spaced transmitter array provides deep and
medium-sensing resistivity measurements determined
from phase shift and amplitude ratio.
- Compensated design minimizes effects of borehole
and washouts.
- 55 and 25-in. resistivity measurements have matched
and symmetrical vertical response.
- Resistivity is accurate from 0.15 to 200 ohm.m.
- Tool operates in fresh, saline, and oil-based muds.
- Deep phase measurement reads essentially Rt in
beds thicker than 5 ft.
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Gamma
Ray Sensor |
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- Rugged scintillation detector furnishes high-resolution,
repeatable logs
- Sensor is located 4 ft from bottom of tool for
early formation identification.
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Log
Outputs |
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- Wellsite-selectable and configurable log formats.
Log quality and tool health indicators are plotted
in addition to log data.
- A full range of log interpretation charts is available.
- The Pronto™ quick-look package provides an early
measure of water saturation and effective porosity.
- Forward-modeling software accuracy.
- Predicts tool response for Pay Zone Steering applications.
- Halliburton’s Desktop Petrophysics™ workstation
provides enhanced vertical resolution logs and other
formation evaluation services at Log Computing Center
locations.
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