Table 1 Statistics of reservoir physical property in XUJIAHE zone.

From: Integrated stimulation technology for ultra deep tight sandstone gas reservoirs with ultra low permeability in Sichuan Xujiahe formation

Layer

Porosity

Permeability

Number of samples

Interval (%)

Average (%)

Number of samples

Interval (%)

Average (mD)

Xu-2

217

0.99 ~ 16.45

9.36

261

0.0001 ~ 7.49

0.088

Xu-3

39

0.67 ~ 2.54

1.19

32

0.0001 ~ 0.059

0.003

Xu-4

56

1.09 ~ 6.18

3.25

61

0.0001 ~ 0.166

0.014

Xu-5

/

/

/

127

0.002 ~ 4.54

0.14

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