科研之友
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摘要
Sedimentary organicfacies cover the formation, evolution, and spatial distribution characteristicsof organic matter, and they are effective tools for oil and gas resourceevaluation and basin prospect prediction. According to the basic organicrock composition of the sedimentary organic facies, combined withthe sedimentary facies and organic matter geochemical characteristicsof Carboniferous-Permian strata, the characteristics of organicfacies and hydrocarbon-generation potential of Upper Paleozoic sourcerocks in Huanghua Depression are being discussed. The results showthat source rocks of Taiyuan and Shanxi Formations in the study areawere oil-prone, and the oil-generation potential of mudstone is greaterthan that of carbonaceous mudstone and coal. The organic facies inthe study area can be divided into six types: (1) terrestrial forestorganic facies; (2) shallow swamp forest organic facies; (3) deepswamp forest organic facies; (4) deep swamp reed organic facies; (5)flowing water swamp organic facies; and (6) open water organic facies.The Taiyuan Formation is mainly composed of flowing water swamp, deepswamp forest, and shallow swamp forest with a strong hydrocarbon-generationcapacity, while the Shanxi Formation chiefly includes organic faciesof the deep swamp forest and shallow swamp forest. The deep swampreed sedimentary organic facies had the highest hydrocarbon-generationpotential, while the terrestrial forest sedimentary organic facieshad the worst hydrocarbon-generation potential. Coal had a certainoil-generating capacity but was weaker than that of mudstone. Comparedwith mudstone, coal had a stronger gas-generating capacity.
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单位中国石油大学（北京）; 中国石油天然气股份有限公司勘探开发研究院; 油气资源与探测国家重点实验室
