Schlumberger Ngi Tool | [top]

| Feature | ArcVision* | EcoScope* | | | :--- | :--- | :--- | :--- | | Primary Use | Basic geosteering | Formation evaluation | Ultra-deep, high-res imaging | | Depth of Detection | ~5-7 ft | ~4-6 ft | ~18 ft | | Vertical Resolution | ~10-12 inches | ~6 inches | ~0.5 inches | | Anisotropy | Basic (Rh/Rv) | Advanced | Full 3D Tensor | | Look-Ahead | No | Limited | Yes (3-5 ft ahead of bit) |

, to provide a "triple-combo" or "quad-combo" suite that includes gamma ray, resistivity, and porosity measurements in a single run. technical comparison between NGI and water-based imagers like the Case studies involving its use in specific field developments? physics of capacitive coupling used in OBM imaging? SCIRP Open Access Ultrasonic Borehole Imager - Acoustic Imaging - SLB schlumberger ngi tool

However, the legacy NGI tool remains in active service in many regions (South America, Middle East mature fields, and North Sea) due to its lower cost and high mechanical reliability. For many operators, the "old" NGI is still the most cost-effective solution for gamma-guided geosteering. | Feature | ArcVision* | EcoScope* | |