page_title: Capillary pressure
section_title: Mercury Injection
hierarchical_section_title: Capillary pressure / Applications / Petrochemical industry / Mercury Injection
caption_attribution_description: English: Flow diagram of the Mercury Injection Method for measuring capillary pressure: 1. Dried sample evacuated, 2. Mercury added, 3. System opened up to atmospheric pressure, mercury level drops, 4. Pressure increased drastically so that mercury enters the sample pores
context_page_description: In fluid statics, capillary pressure is the pressure between two immiscible fluids in a thin tube, resulting from the interactions of forces between the fluids and solid walls of the tube. Capillary pressure can serve as both an opposing or driving force for fluid transport and is a significant property for research and industrial purposes. It is also observed in natural phenomena.
context_section_description: This method is well suited to irregular rock samples (e.g. those found in drill cuttings) and is typically used to understand the relationship between capillary pressure and the porous structure of the sample. In this method, the pores of the sample rock are evacuated, followed by mercury filling the pores with increasing pressure. Meanwhile, the volume of mercury at each given pressure is recorded and given as a pore size distribution, or converted to relevant oil/gas data. One pitfall to this method is that it does not account for fluid-surface interactions. However, the entire process of injecting mercury and collecting data occurs rapidly in comparison to other methods.
caption: Flow diagram of the Mercury Injection Method for measuring capillary pressure: 1. Dried sample evacuated, 2. Mercury added, 3. System opened up to atmospheric pressure, mercury level drops, 4. Pressure increased drastically so that mercury enters the sample pores
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