RES Fluid Measurement Tool


The Reservoir Evaluation System (RES) Fluid Measurement Tool measures properties of reservoir fluids, including resistivity, dielectric, viscosity, and density


Measuring the electrical and mechanical properties of reservoir fluid, including resistivity, dielectric, viscosity and density without making any fluid contact

Features and Benefits

  • Duplicate sensors on dual flowlines enable reliable measurement of multiple fluid properties simultaneously in a range of environments, including wells with high gas-to-oil ratios or condensate.
  • Resistivity, dielectric, viscosity, and density readings are calibrated with National Institute of Standards and Technology (NIST) traceable fluids.
  • Optional nuclear fluid-density measurement provides high-resolution density readings.
  • Noncontact fluid measurement avoids measurement-cell contamination and enhances the accuracy of resistivity and dielectric reading.
  • The tool enables fluid measurements before and after the pump, which helps to detect changes in the measured fluids as they pass through the pump.

Tool Description

The Weatherford RES fluid measurement (RFM) tool provides resistivity, dielectric, viscosity, and density readings of formation fluid. Duplicate sensors on two flowlines enable different combinations of measurements when dual flowlines are used simultaneously.

A mechanical apparatus measures fluid density between 0 and 1.5 g/cc and viscosity from 0.5 to 1,000 cSt. To prevent fluid contamination, the RFM tool uses a noncontact measurement cell for resistivity readings from 0.001 to 20 ohm/m and fluid dielectric constants from 1 to 85.

An optional nuclear fluid-density measurement improves the resolution of density readings from 0.01 to 0.002 g/cc. This feature is suited for wells with high gas-to-oil ratios or condensates and for situations requiring a highresolution fluid-density value.

The RFM section is part of the Reservoir Evaluation System (RES) family of tools.

The calibrated-fluid-properties measurement section of the RES family provides density, resistivity, dielectric, and viscosity measurements of the reservoir fluids being pumped.