吐哈盆地侏罗系煤系烃源岩常规地球化学特征  

Geochemical characteristics of Jurassic coal-measure source rocks in the Turpan-Hami basin

作　　者：侯丽娟[1,2] 黄光辉[1,2] 杜宇斌[3] 

机构地区：[1]长江大学油气资源与勘探技术教育部重点实验室,湖北荆州434000 [2]长江大学地球环境与水资源学院,湖北武汉430100 [3]青海油田钻采工艺研究院,甘肃敦煌736202

出　　处：《石油化工应用》2015年第11期83-87,共5页Petrochemical Industry Application

摘　　要：本文通过对吐哈盆地侏罗系煤系47个烃源岩样品进行有机岩石学特征研究和岩石热解数据分析,系统剖析该区煤系烃源岩常规地球化学特征。研究结果表明,富氢显微组分是煤系有机质中主要的生油显微组分,与普遍认为的烃源岩主要生烃潜力为腐泥组和壳质组不同,在该区西山窑组煤系烃源岩中发现较大数量的基质镜质体和矿物沥青基质与生烃潜量存在明显线性关系,其产油的作用不容忽视。这种线性关系与基质镜质体和矿物沥青基质中某些富氢组分密切相关,而富氢组分可能来源于被微生物作用的高等植物所产生的二级有机质。这与前人关于该研究区的富氢基质镜质体和矿物沥青基质对生烃潜力起着主导因素这一推论相一致,对吐哈盆地煤系烃源岩进一步的油气勘探具有重要的理论指导与研究意义。The regular geochemistry characteristics of Turpan-hami basin is systematically studied based on characteristics of organic petrology and rock pyrolysis analysis of 47 rock samples collected from Jurassic coal bearing strata.The study showed that in the Turpan-ha- mi basin,a coal-rich continental basin, hydrogen-enriched organic matter of coal-bearing formation is the main oil source components.A great amount of desmocollinites and mineral bituminous groundmass were discovered in an obvious linear function relationship with hy- drocarbon generation potential in the studied area,which is against the regular argument that rotten mud group and exinite group are the main substances in source rocks that can gener-ate hydrocarbons.The above phenomenon might be caused by the hydrogen-rich-components which may be the secondary level of organic matter resulting from microbial action on higher plants.This study may have great significance for the oil and gas exploration of next stage, which is also consistent with previous scholars＂ opinion that hydrogen-enriched desmo- collinites and mineral bituminous groundmass are dominant factors in hydrocarbon genera- tion potential.

关 键 词：吐哈盆地 侏罗系 煤系烃源岩 基质镜质体 矿物沥青质 

分 类 号：P618.13[天文地球—矿床学]