Resistivity Logging

Using the inverse of conductivity to generate your reservoir solutions

The quest to measure true formation resistivity (Rt) has challenged petrophysicts for decades. Our portfolio of array resistivity logging services takes the guesswork out of your interpretations. They provide a value of Rt that is closer than ever to the true Rt of the formation. Array resistivity tools offer answers at multiple depths of investigation, removing undesired effects and aiding in understanding, visualizing, and even quantifying the invasion process. 

A technology for every environment

We offer two complementary array type technologies: induction and laterolog. Array induction tools are very accurate when formation resistivity is medium to low, and borehole salinity is not too high. Array laterolog tools are more accurate in conditions where accuracy of the array induction tool starts to degrade. We offer multiple services to cover both technology types with varying environmental specifications. Temperatures up to 500°F and hydrostatic pressures up to 30,000 psi aren’t limiting factors for our portfolio.

Resistivity measurements are a regular part of nearly every openhole logging evaluation: 

  • Evaluate the producibility of a formation
  • Indicate the presence of movable hydrocarbons
  • Determine the true resistivity of the formation and depth of invasion
  • Indicate permeability
  • Determine hydrocarbon saturation
ACRt™ Array Compensated Resistivity Tool Family
The ACRt™ array compensated resistivity tool system represents the latest thinking in conventional array induction technology
ADR™ Azimuthal Deep Resistivity Sensor
LWD sensor provides deep reading (up to 18 feet into the formation), directional and high-resolution images that give early warning of approaching bed boundaries before the target zone is exited. Also provides a traditional multi-frequency compensated resistivity sensor. This one tool provides over 2,000 unique measurements for both precise wellbore placement and more accurate petrophysical analysis.
AFR™ Azimuthal Focused Resistivity Sensor
LWD sensor produces high resolution resistivity images for identifying dip, fractures and borehole breakout. Also provides an omni-directional, laterolog-type resistivity data, electrical images of the formation, and at-bit resistivity (ABR) measurement.
Array Laterolog Tool (ALAT)
Our Array Laterolog Tool provides a reliable resistivity profile in conductive borehole fluids using five borehole-corrected resistivity curves at increasing depths of invasion. The service enables the visualization of invasion and the measurement of true formation resistivity (Rt).
EWR®-PHASE 4 Resistivity Sensor
LWD sensor delivers excellent vertical resolution in low-resistivity, thinly-bedded formations in boreholes from 3-3/4 to 30 inches.
M5™ Integrated LWD Service
Integrated LWD service provides formation evaluation answers from resistivity and azimuthal gamma ray sensors and drilling optimization answers from vibration and pressure sensors.
Micro-Spherical Focused Log (MSFL™) and Microlog (ML) Tools
The Micro-Spherical Focused Log (MSFL™) tool provides a direct measurement of the resistivity in the near region of the borehole (Rxo). Working in all types of conductive mud systems, the MSFL tool string includes a caliper and a microlog (ML).
Xaminer® Multicomponent Induction (MCI) Tool
Our Xaminer® Multicomponent Induction (MCI) tool evaluates 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.
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