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蚀变碳酸盐(△C)是油气藏中低分子量烃类气体运移至地表后氧化形成的特殊碳酸盐,它呈胶结物形式存在于硅铝酸盐裂隙或晶格间,稳定且不易淋滤。在油气藏的上方近地表土壤中,普遍发育△C
The altered carbonates (△ C) are special carbonates formed by the oxidation of low-molecular-weight hydrocarbon gases in the reservoir to the surface and are present as cements in the aluminosilicate fissures or lattices. They are stable Not easy to leaching. In the top of the reservoir above the surface soil, the general development of △ C