Capillary Pressure

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Weatherford Laboratories offers multiple capillary pressure test programs designed to maximize results. Many industry advancements have been implemented over the years to create efficiency and reliability in the delivered test data.

Capillary pressure is the difference in fluid pressure across an interface between two fluids in a confined volume. Reservoirs contain an array of pores of different sizes connected together by pore throats of differing size. Each pore or pore throat size can be considered a point of interest as a means of further investigating a capillary tube model. 


Capillary pressure is determined in the laboratory at ambient or overburden conditions by the following  methods:

1. Porous plate method
2. Mercury injection
3. Centrifuge

Capillary pressure data can be converted from one laboratory system to another. It can also be converted to a reservoir capillary pressure system, given appropriate interfacial tension and contact angle data. These data sets can also be converted to height to determine fluid contact levels and transition zones.

Weatherford Laboratories offers a knowledgeable staff with industry-leading experts on the cutting edge of technology advancements.

  • Development of a dual-porous plate system
  • 1,000 psi membrane plate technology
  • Stressed mercury injection up to a net 5,000 psi
  • Weatherford Imaging Centrifuge System (WICS)
  • Weatherford Imaging Centrifuge Rotor (WICR) coming soon

Capillary Pressure Testing

Weatherford Laboratories can devise a custom capillary pressure test to meet your needs from unconsolidated material to shale material. At our disposal, we have an industry-leading 1,000 psi porous plate system and a camera imaging system for centrifuge testing. Also available is an overburden mercury injection system with a net stress of 5,000 psi. 



Our Capillary Pressure laboratory is equipped to meet the changing needs of the diverse test requirements seen throughout the industry today.