Use a more available gas in field, CH₄, as injection gas for huff-n-puff process instead of CO₂ or N₂.

The effects of core size (including core diameter and length) on huff-n-puff EOR in liquid-rich shale reservoirs was studied.

CT number method, as a new approach, to observe the oil saturation change inside the core during huff-n-puff process.

The effect of huff-n-puff cycle number on shale reservoir EOR was investigated.