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To characterize the polyphase palaeokarst development of Wumishan formation in Jizhong depression, the data of outcrops, cores, thin sections, SEM, core plugs, drilling relief and leakage, and carbon isotope have been analyzed in this paper. The results reveal that the polyphase palaeokarst was petrography controlled of microbial dolostone and grain dolostone, and was identified as three phases: (1)...
Carbonate karst is one of the research highlights in the field of carbonate reservoir geology. High porosity zones can develop in carbonate rocks which are modified by the karst. However, the carbonate porosity development and its evolution process in a polyphase paleokarst are rarely reported in the geological record. Here, the paper focuses on this point from the Precambrian Upper Sinian carbonate...
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