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在中国东部广泛发育一套巨厚碳酸盐岩地层(震旦系至三迭系)。本文扼要探讨了碳酸盐岩有机质早期演化特征之一——有机质的大量成岩丢失及其与碳酸盐岩分布地区油气远景评价之关系。作者还叙述了晚期演化阶段碳酸盐岩有机质,如气体烃、可溶有机质与干洛根的演化特征。根据川南地区油气的垂直分布情况,提出了碳酸盐岩地层中工业油、气的保存下限。
In the eastern part of China a broad set of thick carbonate rock formations (Sinian to Triassic) have been developed. This article briefly discusses the large-scale diagenetic loss of organic matter, one of the early evolutions of carbonate organic matter, and its relation to the long-term hydrocarbon evaluation of carbonate rocks. The authors also describe the evolutionary characteristics of carbonate organic matter, such as gaseous hydrocarbons, soluble organic matter, and cadmium, in late evolutionary stages. According to the vertical distribution of oil and gas in southern Sichuan, the lower limit of the preservation of industrial oil and gas in carbonate stratum is proposed.