Research on the Oil-Bearing Difference of Bedding Fractures: A Case Study of Lucaogou Formation in Jimsar Sag

Table 5

Classification criteria for pore and throat in low permeability sandstone [66].

Throat size rating	Prevailing throat radius (μm)
Coarse throat	>4
Medium throat	2–4
Fine throat	1–2
Tiny throat	0.5–1
Microthroat	0.025–0.5
Adsorption throat	<0.025