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ZoneTrak G™

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The Baker Hughes ZoneTrak G™ near-bit gamma service provides early formation identification, geo-stopping, and geosteering capabilities while drilling when a gamma ray measurement contrast exists. This enables rapid identification of geological targets, allowing early confirmation of the zone of interest. Used with either conventional rotary systems or AutoTrak™ rotary steerable systems, the near-bit sub gathers formation gamma ray measurements directly behind the bit, and it can operate in either oilbased or water-based drilling fluids, minimizing exposure to troublesome formations.

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Quickly identify formation changes while drilling with the ZoneTrak™ G Near-Bit Gamma service from Baker Hughes. The resulting borehole gamma image helps you avoid wellbore instability challenges while optimizing well placement in the most productive part of your reservoir.

The ZoneTrak G service delivers high-quality, single- and dual-gamma ray measurements up to 500 API, with an accuracy of +/- 5 API at 100 API. It also provides azimuthal gamma ray, gamma images, and drilling dynamics measurements.

The ZoneTrak G service uses these high-resolution measurements to generate borehole gamma images directly behind the bit. These images, together with our Reservoir Navigation Services (RNS) and family of AutoTrak™ rotary steerable systems (RSS), allow for efficient geosteering to maximize your reservoir exposure. The service also provides accurate information for geostopping, particularly in low-resistivity contrast formations.

The ZoneTrak G service includes two scintillation gamma ray detectors for high statistical repeatability of the measurements and improved service reliability. In addition, the data telemetry system can be tailored to improve resolution of the transmitted data for improved measurement accuracy.

The ZoneTrak G service is available in 4-3⁄4-in., 6-3⁄4-in., and 9-1⁄2-in. sizes to ensure measurement coverage for virtually any borehole size. Special versions of the 6-3⁄4-in. and 9-1⁄2-in. service are also available for running above conventional motor systems or directly above the bit.

Features and Benefits
• Includes two gamma sensors for early detection of target production zone
• Eliminates need for additional runs with redundancy and accuracy of measurements
• Reduces nonproductive time (NPT)
• True azimuthal gamma ray measurements above the bit with imaging capabilities in up to 16 sectors
• Optimizes wellbore placement in the target zone
• Maximizes productive reservoir length through precise casing point selection
• Minimizes loss of coring section interval through precise core point selection
• Deployable in water and oil-based muds
• Increases use in a variety of formations where water and oil-based muds are typically used
• Real-time gamma data can be displayed through the Baker Hughes WellLink™ service
• Increases efficiency by monitoring data from the Baker Hughes BEACON center or operator’s facility
• Reduces NPT by using data to make decisions and drilling adjustments from remote locations
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