海侵作用对芳烃组成特征的影响:以库车坳陷中生界腐殖煤为例  

Effects of transgression on aromatic hydrocarbon composition characteristics:a case study of mesozoic humic coal in the Kuqa Depression

作　　者：张文俊 项威 张敏 李洪波 ZHANG Wenjun;XIANG Wei;ZHANG Min;LI Hongbo(Hubei Key Laboratory of Petroleum Geochemistry and Environment(College of Resources and Environment,Yangtze University),Wuhan 430100,China;Tianjin Branch Company,CNOOC(China)Co.,Ltd.,Tianjin 300450,China)

机构地区：[1]油气地球化学与环境湖北省重点实验室(长江大学资源与环境学院),湖北武汉430100 [2]中海石油(中国)有限公司天津分公司,天津300450

出　　处：《中国矿业》2023年第4期162-172,共11页China Mining Magazine

基　　金：国家自然科学基金项目资助(编号:42072165)。

摘　　要：芳烃化合物是烃源岩与原油的重要有机组分,含有丰富的地球化学信息,主要应用于沉积环境以及成熟度研究,而针对沉积环境对腐殖煤芳烃化合物分布特征影响的研究较少。库车坳陷库车河剖面与卡普沙良河剖面的腐殖煤样品芳烃化合物含量以及分布特征存在明显差异性,库车河剖面含有高丰度的萘、菲系列化合物以及高含量的氧芴及烷基氧芴,丰富的惹烯、卡达烯、1,2,5-三甲基萘以及1,2,5,6-四甲基萘等高等植物来源化合物,属于典型氧化环境沼泽相腐殖煤生源特征;与传统腐殖煤的芳烃分布不同,卡普沙良河剖面腐殖煤的色谱-质谱结果显示其具有更高含量的菲系列、[艹屈]系列、9-甲基菲、硫芴及苯并硫芴等表征还原环境以及菌藻类生源特征的化合物。研究结果表明,差异性或来自于卡普沙良河剖面在沉积成岩时,海水侵入作用造成的由细菌及其他微生物所主导的针对高等植物的生物改造作用。Aromatic compounds are important organic components in source rocks and crude oil,which are rich in geochemical information,and they has been wild used in the study of sedimentary environment and maturity,while the influence of sedimentary environment on the distribution characteristics of humic coal aromatic compounds is rare studied.There are obvious differences in aromatic compound content and distribution characteristics of the humic coal samples from the Kuqa River profile of the Kuqa depression and the Kapushaliang River profile in this study.The Kuqa River profile contains high-abundance naphthalene,phenanthrene series compounds and high content of diabenzofuran and alkay diabenzofuran,rich in retene,cadalene,1,2,5-TMN and 1,2,5,6-TeMN and other higher plant source compounds,which belong to the characteristics of typical oxidation environment swamp phase humic coal.Different from the aromatic distribution of traditional humic coal,the mass spectrometry-chromatography results of humic coal in the Kapushaliang River profile show that it had higher content of phenanthrene series,9-methylphenanthrene,diabenzothiophene,alkay diabenzothiophene and other compounds that characterized the reduced environment and the input of homonemeae.The research results show that the difference may be due to the biological transformation of higher plants dominated by bacteria and other microorganisms caused by seawater intrusion during the sedimentary diagenesis of the Kapusaliang River section.

关 键 词：海侵作用 煤芳烃组成 异常分布 三芴系列 古沉积环境 

分 类 号：TE122.1[石油与天然气工程—油气勘探]