羌塘盆地双湖地区索瓦组烃源岩芳烃地球化学特征及意义  

Geochemical characteristics and significance of aromatic hydrocarbons in the Suowa Formation source rocks in the Shuanghu area,Qiangtang Basin

作　　者：杨易卓 赵珍[3] 黄志龙[1,2] 唐友军 李梦茹 屈童 潘永帅 王柏然 于瑾 YANG Yizhuo;ZHAO Zhen;HUANG Zhilong;TANG Youjun;LI Mengru;QU Tong;PAN Yongshuai;WANG Boran;YU Jin(College of Geosciences,China University of Petroleum(Beijing),Beijing 102249,China;State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum(Beijing),Beijing 102249,China;Chinese Academy of Geological Sciences,Beijing 100037,China;Hubei Key Laboratory of Petroleum Geochemistry and Environment,College of Resources and Environment,Yangtze University,Wuhan 430100,Hubei,China;Wuhan Center,China Geological Survey(Central South China Innovation Center for Geosciences),Wuhan 430205,Hubei,China;PetroChina Yumen Oilfield Company,Jiuquan 735000,Gansu,China)

机构地区：[1]中国石油大学(北京)地球科学学院,北京102249 [2]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249 [3]中国地质科学院,北京100037 [4]长江大学资源与环境学院,油气地球化学与环境湖北省重点实验室,湖北武汉430100 [5]中国地质调查局武汉地质调查中心(中南地质科技创新中心),湖北武汉430205 [6]中国石油玉门油田分公司,甘肃酒泉735000

出　　处：《地球化学》2024年第5期655-667,共13页Geochimica

基　　金：中国地质调查二级项目(DD20211343);西藏自治区科技计划项目(XZ202101ZY0014G)联合资助。

摘　　要：为认识羌塘盆地双湖地区索瓦组烃源岩有机质来源、沉积环境及成熟度,本研究采用抽提分离和气相色谱-质谱联用等技术分析了双湖地区索瓦组烃源岩中芳烃类化合物地球化学特征。结果表明,双湖地区索瓦组烃源岩中存在较高丰度的1,2,5-三甲基萘、9-甲基菲、惹烯、?及三芳甾烷系列化合物等,指示了高等植物的母质来源。三芴、二苯并噻吩及三芳甾烷系列化合物的分布特征指示索瓦组烃源岩沉积于还原环境。萘、菲、二苯并噻吩及三芳甾烷系列化合物等成熟度参数表明,羌塘盆地双湖地区索瓦组烃源岩已达到成熟阶段。综合有机质丰度及类型分析,认为羌塘盆地索瓦组烃源岩具有一定油气资源勘探价值。In order to understand the source of organic matter,sedimentary environment,and maturity of the Suowa Formation source rocks in the Shuanghu area,Qiangtang Basin,the geochemical characteristics of aromatic compounds in the source rocks were analyzed using extraction fractionation and gas chromatography-mass spectrometry.The results show that the source rocks of the Suowa Formation in the study area have high abundances of 1,2,5-trimethylnaphthalene,9-methylphenanthrene,retene,chrysene series compounds,and triaromatic steroids,indicating a source of higher plants.The distribution characteristics of trifluorene,alkyl dibenzothiophene,alkyl dibenzofuran,and triaromatic steroids indicate a reductive sedimentary environment for the Suowa Formation.A comprehensive study of the maturity parameters of alkylnaphthalene,alkylphenanthrene,alkyldibenzothiophene,and triaromatic steranes showed that the Suowa Formation source rocks in the Shuanghu area of the Qiangtang Basin have reached maturity stage.Based on a comprehensive analysis of the abundances and types of organic matter,it is concluded that the source rocks of the Suowa Formation in the Qiangtang Basin have a certain exploration value for oil and gas resources.

关 键 词：羌塘盆地 索瓦组 烃源岩 芳烃地球化学特征 母质来源 成熟度 沉积环境 

分 类 号：P593[天文地球—地球化学]