| Feature | Detail | |---------|--------| | | Integrated into the bottom hole assembly (BHA), typically 1–2 m behind the bit | | Sensors | Multiple azimuthally oriented scintillation detectors (usually 2 to 16 sectors) | | Measurement | Natural gamma ray API (total count rate) | | Azimuthal Coverage | 360° around the tool | | Data Transmission | Real-time via mud pulse telemetry (compensated for limited bandwidth) and high-resolution memory recording | | Temperature Rating | Up to 150°C (302°F) | | Pressure Rating | Up to 25,000 psi (172 MPa) | | Rotation Speed | Optimal from 60–200 RPM |
In complex reservoirs, the NGI tool can identify laminations as thin as a few millimeters, significantly improving porosity and fluid content estimations. schlumberger ngi tool
Standard tools use coaxial antennas (loops parallel to the tool axis). The uses a combination of coaxial and tilted antennas. By measuring the phase shift and attenuation of EM waves as they pass through different geological layers, the tool calculates anisotropic resistivity (horizontal and vertical resistivity, Rh and Rv). | Feature | Detail | |---------|--------| | |
In the oil and gas industry, accurately characterising a reservoir’s properties is the difference between a high-performing well and a costly dry hole. The —often associated with the advanced AIT (Array Induction Imager Tool) and Rt Scanner families—represents a leap forward in resistivity logging technology. By measuring the phase shift and attenuation of
The Schlumberger NGI tool is a logging-while-drilling (LWD) tool designed to provide detailed information about the subsurface geology and geochemistry of a wellbore. This advanced tool combines nuclear and geochemical measurements to deliver high-resolution images of the formation, enabling drillers to make informed decisions about well placement, trajectory, and completion.