TRIM Resistivity Tool

The TRIM Induction Resistivity tool utilises 20Khz Induction Resistivity technology to provide geosteering and formation evaluation information while drilling.

Description

The TRIM Resistivity tool induces a 20Khz magnetic field into the formation, which generates eddy currents that are proportional to its conductivity. These currents are measured by the TRIM sensor package, which is mounted in a side channel in the resistivity sub, affording superior protection against borehole wall impact damage and allowing easy maintenance and replacement when required.

Typically sited at the bottom of the LWD string, the tool transmits data in real time for correlation and geosteering purposes and stores high resolution data downhole for later download at surface. Calibration is straightforward with sonde error and temperature corrections applied downhole in firmware. Deconvolution, borehole corrections, etc., are automatically applied by the Geolink Navigator surface software.

Features

• Wireline comparable log - 20Khz frequency.

• Straightforward calibration - sonde and borehole corrections in software.

• Side channel mounting - Sensor protection and easy maintenance.

• Depth of Investigation - equivalent to wireline deep induction.

• Good vertical resolution - equivalent to wireline medium induction.

Ver B September 2007