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Advanced Rock Properties

Geomechanics ExpressSM


Brinell Hardness to Identify Unconfined Compressive Strength

Rapid, non-destructive, core-based strength logs using Brinell Hardness and Ultrasonic Velocity can rapidly identify the relative rock strength in conventional cores over large depth intervals. This measurement provides a "quick-look" at geomechanical properties.


Benefits of using Brinell Hardness to develop Core-Based Strength (CBS) Logs
  • Provides the relative strength along the length of the core
  • Identifies the weakest & strongest areas over large depth intervals
  • Provides a nondestructive strength profile vs. depth
  • Provides high resolution logs with multiple rock mechanical parameters
  • Readily converted to UCS
  • A helpful guide in determining which areas require additional core analysis
  • Superior tool for strength diagnostics in rubbled shale

Geomechanics Express

Geomechanics Express



Acoustic Velocity to Identify Unconfined Compressive Strength


Benefits of using Acoustic Velocity to develop Core-Based Strength (CBS) Logs
  • Provides a nondestructive strength profile vs. depth
  • Provides high resolution logs with multiple rock parameters (Vs, Ed, UCS)
  • Probes full diameter of core rather than just the top surface
  • Sonic velocities are an industry standard for indirect determination of strength
Acoustic Velocity measurements provide
  • Unconfined compressive strength (UCS) versus depth
  • Dynamic Young's modulus (Ed) versus depth
  • Dynamic Poisson's ratio versus depth
  • Compressional (Vp) and Shear (Vs) wave velocities
Geomechanics Express

Acoustic velocity measurements on core can provide high resolution logs of wave velocities, unconfined compressive strength, and dynamic Young's modulus and Poisson's ratio versus depth.