Fine Depicting of Seepage Barrier for Gas Flooding in the Lower Wuerhe Formation Reservoir of the 8^th District in China

Table 2

Mineral composition of interlayer cores.

Sample number	Mineral content (%)
	Quartz	K-feldspar	Plagioclase	Calcite	Square zeolite	Clay minerals
805-3	20.9	5.1	11.8	4.6	35.4	22.2
8545-2	17.7		25.9	6.1	28.2	22.1
8545-4	27.1	4.8	12.0	2.3	35.5	18.3
8545-9	37.2	4.6	9.8	5.2	34.1	9.1
JW32-3	31.6		14.7	6.7	16.2	30.8
JW32-5	27.3		13.6	11.1	24.4	23.6
Average	27.0	4.8	14.6	6.0	29.0	21.0