地质与资源2023，Vol.32Issue(6)：743-749,7.DOI:10.13686/j.cnki.dzyzy.2023.06.011
川中地区侏罗系烃源岩和原油中三环萜烷分布特征及指示意义
DISTRIBUTION AND INDICATION OF TRICYCLIC TERPANE IN JURASSIC SOURCE ROCKS AND CRUDE OIL IN CENTRAL SICHUAN BASIN
摘要
Abstract
The distribution characteristics of tricyclic terpenes in biomarkers and their indicative significance for sedimentary environment and biological sources are discussed through the systematic geochemical analysis of source rocks and crude oil samples from Jurassic Da'anzhai Member in central Sichuan Basin by gas chromatography-mass spectrometry(GC-MS).The results show that the Pr/Ph ratios of source rocks and crude oil are medium level,with C19-C26 tricyclic terpenes showing the dominance of C21,low relative percentages of C19+2o and C23 contents,and C24TeT/C26TT value greater than 1,indicating that the water was shallow during the sedimentary period of Da'anzhai Member,and the biogenesis was mainly bacteria and algae,with rich mixed-source input of higher plants,which was formed in the weak reduction environment of freshwater lake facies.关键词
烃源岩/三环萜烷/沉积环境/大安寨段/侏罗系/川中地区Key words
source rock/tricyclic terpane/sedimentary environment/central sichuan basin/Da'anzhai Member/Jurassic/central Sichuan Basin分类
天文与地球科学引用本文复制引用
杨岩岩,唐友军,洪海涛,李美俊,吴长江,张吉振,卢晓林..川中地区侏罗系烃源岩和原油中三环萜烷分布特征及指示意义[J].地质与资源,2023,32(6):743-749,7.基金项目
国家自然科学基金项目"苯基多环芳烃检测及其石油地球化学意义"(41972148) （41972148）
国家自然科学基金重点项目"深层油气的来源和演化:单体化合物和硫碳同位素限定"(41730424). （41730424）
