Pore Structure Differentiation between Deltaic and Epicontinental Tight Sandstones of the Upper Paleozoic in the Eastern Linxing Area, Ordos Basin, China

Table 1

Proportion of pore types in coal-measure sandstone.

Layer	Residual intergranular pores (%)	Interparticle dissolution pores (%)	Intragranular dissolution pores (%)	Intercrystalline pores (%)	Rate (%)
Shanxi Formation	0	0.50	1.25	0.25	2.00
Taiyuan Formation	0.46	4.77	4.92	0.31	10.46