煤系有机质生烃潜力评价标准探讨  

CRITERIA FOR EVALUATING THE HYDROCARBON GENERATING POTENTIAL OF ORGANIC MATTER IN COAL MEASURES

作　　者：陈建平[1] 赵长毅[1] 何忠华 

机构地区：[1]中国石油天然气总公司石油勘探开发科学研究院,北京市910信箱地质所100083

出　　处：《石油勘探与开发》1997年第1期1-5,共5页Petroleum Exploration and Development

摘　　要：根据西北地区侏罗纪煤系地层中2300余个岩样（煤、炭质泥岩和泥岩）的有机地化分析数据，详细研究了3类煤系烃源岩的热解生烃潜量与有机碳、氯仿沥青“A”、总烃含量的关系。对于煤系烃源岩的评价，不能简单套用一般湖相泥岩的评价标准。有机碳含量为2％～5％的煤系泥岩是煤系中最好的油源岩；煤的生烃能力主要取决于煤中富氢显微组分的含量，其有机碳含量与热解生烃潜量没有相关关系；炭质泥岩（有机碳含量为6％～40％）的热解生烃潜量与其有机碳含量的相关性很差，用热解生烃潜量和氢指数来评价更准确。Based on the organic geochemical data of over 2,300 rock samples (including coal, carbargillite and mudstone samples) fromthe Jurassic coal measure strata in northwestern China, the relationship between pyrolysis hydrocarbon-generating potentialof Rock-Eval pyrolysis (S1 +S2 ) and the chloroform bitumen 'A', and the total hydrocarbon(HC) in three types of coal mea-sure source rocks is studied in this paper. In evaluating the coal measure source rocks, simply using the generalized evaluationcriteria for lacustrine source rocks is not correct. The coal measure mudstones with a total organic carbon content (TOC) of2% to 5% are the best source rocks in coal measures. The hydrocarbon generating capacity of coal mainly depends on the perhydrous maceral content and there is no correlation between the Tpe of coal and its pyrolysis hydrocarbon-generating poten-tial- The pyrolysis hydrocarbon-generating potential of carbargillites (with a TOC of 6% to 40% ) has a poor correlation withtheir TOC, so their more precise evaluation criteria should be the pyrolysis hydrocarbon-generating potential and the hydro-gen index.

关 键 词：煤系 有机质 生油岩评价 生油指标 生油气量 

分 类 号：P618.110.4[天文地球—矿床学]