Genetic Mechanisms and Identification of Low-Resistivity Pay Zones: A Case Study of Pengyang Area, Ordos Basin, China

Table 2

Clay mineral analysis results of the Chang 8 member in Pengyang area.

Sample number	Illite (%)	Kaolinite (%)	Chlorite (%)	Illite/smectite (%)	Chlorite/smectite (%)
T1	0	0	22	61	0
T2	0	0	0	30	55
T3	0	0	6	29	0
T5	10	10	57	23	0
T10	13	38	44	6	0
T13	3	0	97	1	0
T14	8	0	88	4	0
T16	11	0	87	2	0
T17	6	0	80	5	0
T20	16	10	57	17	0