MEASURES FORMATION RESISTIVITY IN THREE DIMENSIONS

OVERVIEW

The Halliburton Xaminer® Multicomponent Induction (MCI) service enables the evaluation of anisotropic formations by measuring the formation resistivity both vertically and horizontally at different depths of investigation. When run with a directional instrument, the tool provides structural dip and azimuth.

The Xaminer tool has a transmitter triad (collocated triaxial array of  coils) and six sets of receiver coils. The two receiver coils closest to the

transmitter are standard induction coils, while the remaining four coils are built as triads. The tool operates by sequentially energizing each of the coils (x, y, z) in the transmitter and measuring the signals in each of the receiver coils. Therefore, each of the receiver triads produces nine signals per frequency. These signals are corrected for borehole effects and then inverted in real time to obtain the desired formation measurements.

The tool operates simultaneously as an array induction with the same output as the Halliburton ACRt™ (Array Compensated Resistivity tool), and as an Rh and Rv tool. It is combinable with tools from the LOGIQ® family, and it should be run centralized, at the bottom of the string.

Because the tool provides dip and azimuth information, it needs to be run with tools that have a directional package.

BENEFITS

» Provides more accurate evaluation of water saturation in anisotropic formations, including turbidites, laminated formations, low-resistivity pay, and fractures

»  Provides more accurate resistivity in angled beds

» Rv and Rh are generated in real time

» Structural dip and azimuth

APPLICATIONS

More accurate evaluation of water saturation in anisotropic formations, as in:

»  Turbidities

» Laminated formations

»  Low-resistivity pay

» Structural information: formation dip and azimuth in oil-based muds

» Invasion analysis using 3D resistivity data

» Fractures