Objective A total of 820 million tons of potash reserves are predicted to exist in the Palaeocene–Eocene of the Jianghan Basin.However,the basin history is still unclear concerning the potash enriching conditions and mechanism.The Well SKD1 is the first exploration well drilled in the Paleogene of Jianghan Basin with continuous coring,which was implemented in the south-central Objective A total of 820 million tons of potash reserves are predicted to exist in the Palaeocene-Eocene of the Jianghan Basin. Hosted, the basin history is still unclear concerning the potash enriching conditions and mechanism. The Well SKD1 is the first exploration well drilled in. the Paleogene of Jianghan Basin with continuous coring, which was implemented in the south-central