Acid-base alternation diagenesis and its influence on shale reservoirs in the Permian Lucaogou Formation, Jimusar Sag, Junggar Basin, NW China

WANG Jian,ZHOU Lu,LIU Jin,ZHANG Xinji,ZHANG Fan,ZHANG Baozhen

Table 2 Electron probe analysis results of analcite in the Lucaogou Formation reservoirs.

Sample number	K₂O/%	CaO/%	TiO₂/%	P₂O₅/%	Na₂O/%	Al₂O₃/%	MgO/%	SiO₂/%	MnO/%	FeO/%	Total/%	Si/Al
1	0.04	0.01	0	0.03	6.78	20.2	0.01	65.02	0	0.11	92.19	2.73
2	0.22	0.03	0	0	8.54	20.93	0.04	62	0.04	0.11	91.91	2.51
3	0.05	0.01	0.01	0	7.12	20.8	0	65.04	0	0.11	93.13	2.65
4	0.02	0	0.01	0.02	8.26	20.88	0	63.47	0	0.19	92.85	2.58