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Our Services

Special Core Analysis (SCAL)

COREX's Special Core Analysis facility, originally established in 1975, combines abundant state of the art equipment with its most important resource - a dedicated team of highly skilled people with over 200 years of experience in the testing of core material.

A full range of Special Core Analysis preparation and testing formats is offered and a programme can be tailored to suit the specific objectives of the client. Inbuilt flexibility allows one or more of the formats to be adapted to resolve unique issues that a particular lithology, a new product or a key model parameter demands.

Allied to the generation of Special Core Analysis data is a Consultancy service that is at the client's disposal, whenever there is a specific need. The service encompasses programme design, data interpretation and integration, formation evaluation, reservoir model input and product screening.

  • Sample Preparation - wettability restoration, Critical Point Drying, mounting of unconsolidated sand, and fractured carbonates, preparation of composite stacks
  • Electrical Properties
    • Formation Resistivity Factor, with Cementation Factor (m), under ambient and elevated reservoir overburden pressure
    • Resistivity Index, with Saturation Exponent (n), under ambient and elevated reservoir overburden pressure. In conjunction with Porous Plate or by Continuous Injection.
    • Cation Exchange Capacity (CEC), by wet chemistry or by Core Conductivity Method (Co/Cw)
  • Impact of Overburden (Stress) to 10,000 psi
    • Pore Volume Compressibility and Porosity
    • Specific and Effective Permeability to air, brine and oil

  • Capillary Pressure
    • Air-Brine and Oil-Brine by the Porous Plate technique, at ambient and elevated overburden pressure
    • High speed Centrifuge technique
    • Mercury Injection to 5,000 and 60,000 psi depending on sample type

  • Wettability
    • Methods available – Amott, USBM (centrifuge), Combined Amott/USBM, and Droplet.
    • Contact Angle and Interfacial Tension

  • Relative Permeability
    • Unsteady and steady state displacement options
    • Displacement of mobile phase by gas, water or oil
    • Drainage and Imbibition Full Curves and End Points
    • In Situ Monitoring by the attenuation of X-Rays for both unsteady and steady state
    • Ambient and reservoir conditions, with dead and live crude oil
    • Trapped (residual) gas Saturation determination
  • Allied Formats
    • Acoustic velocity with generation of geomechanic parameters
    • Grain Size Analysis by Sieve Analysis and Laser Particle Size Analysis
    • Caprock Analysis

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