Study on Sedimentary Facies and Reservoir Characteristics of Paleogene Sandstone in Yingmaili Block, Tarim Basin

Table 10

Reservoir classification evaluation table in Yingmai 7 block of Yingmaili gas field.

Compare items		Reservoir type
		I	II	III	IV
Thickness of single layer, m		≥4	4 ~ 2	2 ~ 1	<1
Lithology		Fine sandstone, siltstone	Fine sandstone, siltstone	Fine sandstone, siltstone	Siltstone
Microphase		Underwater distributary channel estuary dam	Underwater distributary channel estuary dam	Underwater distributary channel estuary dam	Underwater distributary channel
Reservoir physical properties	Porosity, %	≥18	18~15	8 ~15	<8
	Permeability, 10^-3 μm^2	≥200	200~100	100~2.5	<2.5
Mercury intrusion parameter	Displacement pressure, MPa	0.005~0.04	0.04~0.08	0.04~0.3	>0.3
	Median pressure, MPa	0.07~0.86	0.19~2.40	0.43~2.56	>2.25
	Median pore throat radius, μm	1.27~10.53	0.58~5.33	0.29~1.71	<0.29
	Maximum pore throat radius, μm	18.06~72.06	2.13~18.15	9.04~2.23	<2.23