The purpose of this research was to examine paleoenvironments, hydrothermal activity, and seawater restriction the lower Cambrian Niutitang Formation shale gas reservoir in eastern Xuefeng uplift determine factors affecting organic matter (OM) enrichment. In studied borehole Xiangan 1 well western Hunan Province, can be subdivided into Niu1, Niu2, Niu3 Members based on geological geochemical fe...