AIT Array Induction Imager Tool

Multiple Depths of Investigation for Shallow to Deep Resistivity Logs

Measure openhole formation conductivity accurately

The AIT array induction imager tool generates resistivity logs with different depths of investigation. Multichannel signal processing gives robust and stable tool responses with enhanced radial and vertical resolution, and environmental effects are corrected for.

Interpretation of AIT logs is much easier than with other induction logs. Because all the logs in a set utilize a common measurement principle, you can expect a close match in impermeable zones. You can interpret the differences between curves.

Ensure real-time quality control

Catastrophic array failures downhole can be confused with perturbations caused by environmental effects. To address this type of failure, we employ continuous real-time monitoring. The AIT tool performs a quality assessment, based on a self-consistent pattern recognition of the entire system from sensor to recorded log. This supplements the established surface checks.

Realize significant rig-time savings

The AIT tool has unique through-wiring that lets you run other logging tools above and below. Bottom-only tools, such as the FMI fullbore formation microimager and dual dipmeter tools, can be run in combination with an induction log. In addition to significant rig-time savings, combining tools reduces depth-matching problems. This is important for interpreting the fine detail of FMI images and when any depth mismatch could obscure correlations or lead to erroneous conclusions.

Enhance analysis in oil-base mud systems

The invasion signature on AIT logs is greatly reduced if the filtrate is the oil component of the mud rather than the water component. The resistivity contrast between filtrate and formation fluid may be small. The AIT log gives you a better understanding of the downhole behavior of oil-base mud systems.

Benefits

• Measure openhole formation conductivity accurately
• Ensure real-time quality control
• Realize significant rig-time savings
• Enhance analysis in oil-base mud systems

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