Capillary Pressure Mercury System (Purcell)

The Capillary Pressure Mercury System (CT-RCA-CPM) measures drainage capillary pressure and pore volume of a core plug by the Purcell mercury injection method. A dry plug is evacuated in a core holder, mercury is injected at increasing pressure, and the volume entering the pore space is recorded against pressure. The result is a capillary pressure curve for seal, transition zone and pore throat analysis at routine core analysis scale.

How it works

The plug, 1 in or 1.5 in in diameter and up to 3 in long, is loaded in the core holder and the system is evacuated by a 2.5 m3/h vacuum pump to a final pressure of 10-3 mbar. Mercury injection pressure, the controlled variable, is then raised in steps up to 140 bar (2,000 psi) using a 2,000 psi nitrogen source. The test runs at ambient temperature. Injected mercury volume against injection pressure gives the capillary pressure curve, and the injected volume gives pore volume.

Power supply is 110 to 220 VAC, 50 or 60 Hz. Sample size, pressure and temperature ratings, wetted materials and instrumentation are configured per project.

What is included

• Core holder for 1 in or 1.5 in plugs up to 3 in long
• Mercury injection with pressure control up to 140 bar (2,000 psi)
• Vacuum pump, 2.5 m3/h, final vacuum 10-3 mbar
• Nitrogen pressurizing connection for a 2,000 psi supply

Specify for your project

• Plug diameter, 1 in or 1.5 in, and length up to 3 in
• Maximum injection pressure within 140 bar
• Nitrogen supply available (2,000 psi) and power supply (110 to 220 VAC, 50 or 60 Hz)
• Sample throughput and number of core holders
• Instrumentation and data output per project

This description defines the product family. Guaranteed performance, included hardware, exclusions, interfaces and acceptance criteria are stated only in the project-specific technical proposal and approved datasheet.

Features

• Pressure range : up to 140 bar (2,000 psi)
• Temperature : ambient
• Core Diameter : 1" or 1.5"
• Core length : up to 3 inches
• Vacuum pumping speed : 2.5 m3/h
• Final vacuum pressure : 10-3 mbar.
• Power supply : 110-220 VAC, 50 or 60 Hz
• Nitrogen source : 2,000 psi