石油实验地质2017，Vol.39Issue(2)：230-237,8.DOI:10.11781/sysydz201702230
渤海湾盆地车镇凹陷下古生界烃源岩生物标志物特征
Biomarker characteristics of Lower Paleozoic source rocks in Chezhen Sag, Bohai Bay Basin
摘要
Abstract
The biomarkers of the Lower Paleozoic carbonate rocks in the Chenzhen Sag of Bohai Bay Basin were stu-died using GS-MS. Their sedimentary environment, organic matter origin and thermal evolution degree were dis-cussed, and compared them with the Eogene source rocks. The normal alkanes showed a single-peak distribution, with the main peak carbon varying between n-C16 and n-C18 . Odd/even carbon number preference was not obvious, and Pr/Ph ratio ranged from 0.37 to 1.2, showing a weak phytane dominance or a balance between pristane and phytane. Hopane was the main terpane compound, with low tricyclic terpanes, high tetracyclic terpane, normal homohopane and low gammacerane contents. The C27 , C28 , C29 regular steranes showed an asymmetrical "V" type distribution, with low rearranged sterane and high 4-methyl rearranged sterane contents. Phenanthrene and tris-fluorene series were the main aromatic compounds, lack of biphenyl and other higher plant imported biomarkers. The naphthalene series was abundant while 1,2,5-trimethylnaphthalene and 1,2,5,6-tetramethylnaphthalene had a low abundance. Dibenzothiophenes were rich and dibenzofurans were poor. Aromatic steranes were mainly triaryl steranes, and mono-aromatic steranes were absent. These biomarkers indicated that the Lower Paleozoic source rocks were deposited in a reductive shallow sea environ-ment, mainly originated from fungus, algae and lower aquatic plankton, and were highly mature and over-mature. Four saturated hydrocarbon biomarkers and five aromatic hydrocarbon biomarkers were chosen to distinguish source rocks in the Lower Paleozoic and the Eogene, which provided evidence for oil and source correlation.关键词
生物标志物/碳酸盐岩/下古生界/车镇凹陷,渤海湾盆地Key words
biomarker/carbonate source rock/Lower Paleozoic/Chezhen Sag/Bohai Bay Basin分类
能源科技引用本文复制引用
林红梅..渤海湾盆地车镇凹陷下古生界烃源岩生物标志物特征[J].石油实验地质,2017,39(2):230-237,8.基金项目
国家科技重大专项"济阳坳陷油气富集机制与增储领域"(2011ZX05006-003)资助. （2011ZX05006-003）
