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在分析多种有机质赋存形式的基础上,探讨了塔里木盆地下古生界和南华北石炭系碳酸盐岩的各种有机质含量关系及其成烃演化特征。研究发现,一般操作条件下所得的沥青 A 和沥青 C 并非真正意义的吸附有机质和包裹有机质。目前还无法将真正的包裹有机质从碳酸盐岩中分离出来。由于成熟度、排烃条件等的影响,碳酸盐岩中各种有机质含量的相关关系不明显,仅沥青 A 和沥青 C 有比较差的正相关关系。含Ⅰ—Ⅱ_1型有机质的碳酸盐岩(塔里木盆地下古生界可溶有机质转化率高,含Ⅱ_2—Ⅲ型有机质碳酸盐岩(南华北地区石炭系)的转化率比较低;二者的转化率高峰对应的 R_o 分别位于1.25%附近和1.00%附近;生油窗下限分别在 R_o=1.80%～1.90%和R_o=1.70%～1.80%;其有机母质的生油窗范围,后者宽于前者。不同类型碳酸盐岩成烃特征的差异主要取决于有机母质类型。
Based on the analysis of the occurrence patterns of many organic matters, the relationship between the organic matter content and hydrocarbon generation and evolution of the Lower Paleozoic in Tarim Basin and Carboniferous Carbon in South China and North China was discussed. The study found that under normal operating conditions, the resulting asphalt A and asphalt C are not really adsorption of organic matter and organic matter wrapped. It is not yet possible to separate the true organic matter from carbonate rocks. Due to the influence of maturity, hydrocarbon expulsion conditions and so on, the correlation of various organic matter content in carbonate rocks is not obvious. Only asphalt A and asphalt C have relatively poor positive correlation. Carbonates with type I-II 1 organic matter (Lower Paleozoic dissolved organic matter in the Tarim Basin have relatively high conversion rates and relatively low conversion rates of Type II-III organic carbonates (Carboniferous in South China) The R_o corresponding to the peak of the conversion rate is around 1.25% and 1.00%, respectively; the lower limit of the oil production window is respectively R_o = 1.80% ~ 1.90% and R_o = 1.70% ~ 1.80% Wider than the former.The differences in hydrocarbon generation characteristics of different types of carbonate rocks mainly depend on the type of organic parent material.