Deep Directional Measurements with a High Vertical Resolution
The ARI azimuthal resistivity imager makes directional deep measurements around the borehole with a higher vertical resolution than previously possible from conventional laterolog tools.
Using 12 azimuthal electrodes incorporated in a dual laterolog array, the ARI tool provides a dozen deep-oriented resistivity measurements while retaining the standard deep and shallow readings. A very shallow auxiliary measurement provides data to fully correct the azimuthal resistivities for borehole effects.
The ARI tool is combinable with a wide variety of other tools and is particularly effective for thin-bed evaluations in combination with the IPL integrated porosity lithology toolstring.
ARI images also complement images from the UBI ultrasonic borehole imager or the FMI fullbore formation microimager because of the tool’s sensitivity to features beyond the borehole wall and its lower sensitivity to shallow features.
Applications
- Resistivity logs and images with vertical resolution of less than 1 ft
- Thin-bed analysis
- Fracture identification and characterization
- Evaluation in deviated and horizontal wells
- Gröningen-corrected resistivity
- Evaluation of heterogeneous reservoirs
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