摘要
基于辽西凌源地区侏罗系北票组烃源岩芳烃气相色谱—质谱(GC-MS)分析技术,分析指示有机质母质类型、沉积环境和成熟度的芳烃地球化学特征,揭示芳烃地质意义。结果表明:侏罗系北票组烃源岩芳烃以萘系列、菲系列和三芴系列为优势组分,三者占芳烃总量的80%以上。普遍检测到惹烯、荧蒽、苝、联苯、1,2,5-TMN等陆源高等植物来源标志物,少量表征低等生物来源的[艹屈]等化合物及高丰度的氧芴,研究区北票组烃源岩形成于水体开阔且氧气含量充足的沉积环境,有机质主要来源于陆相松柏类高等植物,细菌藻类等低等生物也有少量贡献,有机质类型为腐殖型或腐泥—腐殖型;烃源岩热演化程度整体上处于低成熟阶段,少部分为成熟阶段,烷基萘等成熟度参数受其他因素影响,不适用于研究区北票组成熟度评价。该结果为辽西凌源地区侏罗系北票组的勘探开发提供参考。
The aromatic fraction of source rock from the Jurassic Beipiao Formation in Lingyuan Area,Western Liaoning Province were analyzed by GC-MS.The geochemical characteristics of aromatics,which indicate the parent material type,sedimentary envivonmeut and maturity of organic matter,are analyzed to reveal the geological significance.The results indicate that naphthalene,phenanthrene and fluorene series were dominated components in total aromatic hydrocarbon content.The commonly detected markers of terrestrial higher plant origin,such as renene,fluoranthene,perylene,biphenyl,1,2,5-TMN,and a small amount of compounds such as flexion series that represent low biological sources,as well as high abundance of oxyfluorene,reflect that the Beipiao Formation source rocks were formed in a sedimentary environment with open water bodies and sufficient oxygen content,and the organic matter is humic and sapropel humic type in the study area.Organic matter mainly comes from higher plants of terrestrial conferous and coniferous species,and lower organisms such as bacterial and algae also make a small contribution.In addition,the maturity parameters such as alkyl phenanthrene in aromatic hydrocarbons indicate that the thermal evolution of source rocks is generally in a low maturity stage,and a small part is in a mature stage.The maturity parameters such as alkyl naphthalene are affected by other factors and are not applicable to the maturity evaluation of Beipiao Formation in the study area.This result provides a reference for further exploration and development of the Jurassic Beipiao Formation in Lingyuan Area,Western Liaoning Province.
作者
石蕾
宗文明
孙求实
李永飞
陈树旺
SHI Lei;ZONG Wenming;SUN Qiushi;LI Yongfei;CHEN Shuwang(Shenyang Center of Geological Survey,China Geological Survey,CGS,Shenyang,Liaoning 110034,China;Northeast Geological S&T Innovation Center,China Geological Surney,Shenyang,Liaoning 110034,China)
出处
《东北石油大学学报》
CAS
北大核心
2022年第6期100-111,I0007,I0008,共14页
Journal of Northeast Petroleum University
基金
国家重点研发计划项目(2019YFC0605404)
国家自然科学基金项目(41790451)
中国地质调查局项目(DD20221664)。
关键词
烃源岩
芳烃
地球化学特征
北票组
侏罗系
凌源地区
辽西
source rocks
aromatic
geochemical characteristics
Beipiao Formation
Jurassic
Lingyuan Area
Westen Liaoning Province
