This is an example setup for oil recovery experiments. In this setup, an aqueous dispersion of CO2 nanobubbles was injected into a high-pressure, high-temperature vessel containing a tight sandstone core that was saturated with live oil. This mimics a huff-n-puff process for tight oil recovery. The CO2 nanobubble dispersion was generated using membrane filters located within the core holder.

The huff-n-puff experiments were conducted at a pressure of 24.2 MPa (3,515 psia), which is above the thermodynamic minimum miscibility pressure of 17.5 MPa (2,538 psia.) at the experimental temperature of 102°C (216°F). Below is a schematic of the setup. Details are in SPE-218179-MS.