煤成油地球化学研究现状与展望

重点评述与煤成油理论及勘探实践有密切关系、并在近几年取得重要进展的煤成烃演化模式、煤的生油能力及排油研究3方面的问题。指出：石油地质化学家已更深刻地认识到了煤成烃模式、阶段因地而异的复杂性;建立判别煤系源岩生油能力的标准是煤成油研究中最为重要的进展之一,其中以依据总生烃潜量（S1+S2）、氯仿沥青“A”和总烃含量与有机碳的相关关系建立的判别方案比较实用和有效;比较系统地评述了（与工业性煤成油气聚集有重要关系的）煤成烃排出问题的4种主要研究方法。进展、存在的问题和分歧。在此基础上,展望了对指导煤成油勘探有重要意义的煤系源岩的分布预测、倾油性的进一步判识及排出问题定量研究的发展趋势。

CURRENT SITUATION AND PROSPECT IN GEOCHEMISTRY OF OIL FROM COALS

This paper focuses on reviewing three important aspects fort geochemistry of oilfrom coals, i. e. the evolution models of coal-derived hydrocarbons, oil potential of a coal and oilexpulsion from coals, which are related tightly to the theory and exploration practice of coal-derived oil and with which important progresses have been made in recent years. It is pointed outthat petroleum geochendsts have understdri profoundly more than before the complexity of theevolution model and stage of hydrocarben from coal with geological settings both qualitativelyand quantitatively. The establishrnnt of determination criterions of oil potential of a coal-bearing source rock is one of the most important advances, and arnong them, the one based on therelationship between the organic cardri and the total hydrmfor potential (S1 + S2 ), chloroform bituminous "A" and total HC content is relatively useful and effective. The four mainmethods used in study the oil expulsion from coal, which has great ded to do with cornrnercialcoal-derived petroleurn accumulation, as well as their progresses, problems and disputes existed,are reviewed systematically. The prediction of ed-bearing source rock distribution and the further determination of oil-prone of a given coal, which have great deal to do with guiding the exploration of oil from coal as well as the developing tendency of the quantitative evaluation of expulsion problem of oil from coal are reviewed at the end of this paper.