Amott Cell

The Amott Cell holds an oil-saturated core plug in brine, or a brine-saturated plug in oil, so that the fluid displaced by spontaneous imbibition or drainage can be collected and read as a volume. Core analysis laboratories use it for wettability measurement by the Amott method, where the spontaneously produced volumes feed the Amott indices. Wettability, whether the rock surface prefers water or oil, is a control on recovery and residual saturation, which is why the cell is a standard item in special core analysis.

How it works

The core is placed in the cell and submerged in the displacing phase under ambient soak conditions. As the wetting phase enters the pore space, the non-wetting phase is expelled and collects in a graduated tube of 20 cc capacity, where its volume is read over time. The measured quantities are the spontaneously produced fluid volumes and, from them, the Amott indices for water and oil.

Two models are offered. Model 1 is an ambient temperature cell operating at atmospheric pressure. Model 2 is a high temperature cell rated to 120 °C and 30 psi for soaks at elevated temperature. Both accept core diameters from 1 to 2 inches and core lengths up to 4 inches.

What is included

• Amott cell sized for cores of 1 to 2 inch diameter and up to 4 inch length
• Graduated tube, 20 cc
• Model 1: ambient temperature, atmospheric pressure version
• Model 2: high temperature version, up to 120 °C and 30 psi

Specify for your project

• Model 1 (ambient) or Model 2 (up to 120 °C, 30 psi)
• Core diameter (1 to 2 inches) and core length (up to 4 inches)
• Number of cells or samples to be run in parallel
• Wetted materials and seals compatible with the brine and oil used
• Instrumentation, if any, beyond visual reading of the graduated tube
• Related items such as an aging cell or automatic imbibiometer, if the workflow requires them

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.

Model 1: Ambient temperature amott cell

• Temperature : ambient
• Pressure : atmospheric
• Core Diameter : 1 up to 2 inches
• Core length : up to 4 inches
• Graduated tube: 20 cc

Model 2: High temperature amott cell

• Temperature : up to 120°C
• Pressure : up to 30 psi
• Core Diameter : 1 up to 2 inches
• Core length : up to 4 inches
• Graduated tube: 20 cc