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从有机地化和石油地质２方面初步探讨了汤原断陷下第三系的煤成油问题。通过对有机碳、生烃潜量、总烃、氯仿沥青“Ａ”及其组分分析、元素分析、热解色谱、干酪根镜下鉴定、同位素等地化资料的分析研究，认为汤原断陷下第三系在地史时期曾发生过煤成油的过程。以地震资料和１口井的地质地化资料为基础，应用盆地模拟技术，在纵横２个方向上区划了可能形成煤成油的层段和范围。通过对面原断陷有利地质条件分析，以及将其和吉普斯兰盆地对比，认为汤原断陷具备煤成油生成、运移、聚集和保存的地质条件。
From the aspects of organic geochemistry and petroleum geology 2, the formation of coal in the Tertiary in Tangyuan fault depression was discussed. Based on the analysis of organic carbon, hydrocarbon potential, total hydrocarbon, chloroform “A” and its component analysis, elemental analysis, pyrolysis chromatography, kerogen microscopy and isotope analysis, Cessation of the Third Department in the history of the earth had happened during the process of coal into oil. Based on the seismic data and geo-geological data of one well, basin modeling techniques are used to map the intervals and ranges of coal-to-oil formation in both vertical and horizontal directions. By analyzing favorable geological conditions of the Mianbian fault depression and comparing it with that of the Giupsland basin, it is considered that the Tangyuan fault depression possesses the geologic conditions for coal formation, migration, accumulation and preservation.