Table 1 Rock types of Qixia formation.

From: Pore connectivity evaluation and seepage characteristic of ultra deep carbonate reservoirs of permian Qixia formation in NW Sichuan basin

Rock type

Porosity

(%)

Permeablity

(mD)

Reservoir quality

Limestone

< 1

-

Low

Dolomitic limestone

0.28–2.02

(1.37)

-

Dolomite

Fine-medium dolomites (FMD)

0.85–4.76

(2.14)

0.22–50.45

(2.14)

High

Medium- coarse dolomites (MCD)

1.40–7.54

(3.58)

0.74–74.13

(2.34)