Array Dielectric eXplorer Formation Evaluation Service

Get key formation data to improve hydrocarbon reserve estimates

The Baker Hughes Array Dielectric eXplorer™ formation evaluation service provides key petrophysical data to improve the quality of reserve estimates. Using multi-frequency dielectric technology, the service quickly and accurately determines hydrocarbon saturation in any formation water salinity or drilling mud.

Get reliable hydrocarbon saturation data

Conventional methods for saturation analysis rely on the contrast between the resistivity of formation water and hydrocarbons. When formation water is nonconductive or its resistivity is unknown, operators rely on time-consuming nuclear magnetic resonance logging or formation testing to identify hydrocarbon saturation. The Array Dielectric eXplorer service relies on dielectric permittivity data to provide hydrocarbon saturation in reservoirs with any water resistivity.

Make decisions at the well site

By providing real-time deliverables, such as water-filled porosity, formation water salinity, and shallow-zone invasion profile data, the service quickly detects freshwater intervals and reveals the mobility of heavy oils. This offers operators earlier decision making opportunities for completion design straight from the field.

Acquire high-quality data in challenging conditions

The Array Dielectric eXplorer service features a dual-resolution sensor array to simultaneously acquire a large volume of data at a common measure point. This enables the service to provide a high-vertical resolution for evaluating thinly laminated beds and to increase the sensitivity of low-frequency measurements for obtaining precise formation data, even in the most challenging conditions.

By obtaining a large volume of permittivity and conductivity data at multiple frequencies, the service creates a comprehensive data set to provide reliable input for inversion modelling of formation parameters. The service identifies continuous textural parameters of the rock structure for the hydrocarbon saturation equation. This information keeps operators from having to make assumptions for their entire fields based on limited interpolated data, which is particularly critical for carbonate formations with complex pore structures and diverse compositions that vary across the field. The service’s dielectric technology enables operators to quickly and cost effectively acquire data for improved saturation analysis. This analysis significantly increases the quality of reserve estimates.

Operate efficiently

The service operates in any drilling mud system, runs at fast logging speed, and combines with all other Baker Hughes wireline formation evaluation services to reduce time spent in the well—saving rig time and cost.


  • Conventional and unconventional oil and gas wells
  • Freshwater or unknown water-salinity reservoirs
  • Carbonate reservoirs
  • Heavy-oil reservoirs

Additional Resources

Brochures / Overviews