摘要
应用GC/MS分析技术,对长岭地区东岭断陷双101井火石岭组烃源岩的地球化学特征进行了分析,所得数据结果表明,火石岭组烃源岩在2115～2400m深度段内,为中等-较好烃源岩,通过镜质体反射率R_o和C_(31)22S/(22S+22R)比值可以得知该段的烃源岩已达到成熟阶段;烃源岩抽提物的正构烷烃分布特征变化较小,为单前峰型,表示烃源岩主要为低等水生生物输入为主,同时C_(27)-C_(28)-C_(29)_(ααα)(R)规则甾烷的相对组成特征,以及纵向上随着深度的变化,表明烃源岩母质类型为混合型,且不同类型母质在不同沉积阶段输入的比例是不同的;烃源岩植烷优势不明显,Pr/Ph平均为1.03,Pr/Ph值以及烃源岩γ-蜡烷/C_(30)藿烷比值随深度变化而变化,说明火石岭组烃源岩沉积环境总体上还原性较好,且沉积水体环境在纵向上的非均质性较强。
By using the analytical techniques of GC/ MS and pyrolysis,geochemical characteristics in Shuang 101 well of source rocks in Dongling Fault Depression of Changling area,the analysis of TOC,hydrocarbon generating potential,and types of organic matter and maturity reveal that at 2115～2400m,the source rock is common to high quality,on the basis of vitrinite reflectance R_o and C_(31) 22S/(22S+ 22R),the analysis result indicates that the source rock is maturity;there is no significant change to the distribution characteristics of n-alkanes from the source rocks,there is front-single peak,it indicates that the central component part of the source rocks is lower hydrobionts,the distribution characteristics of the regular sterane and with the change of the longitudinal depth indicate that the matrix of the source rocks is mixed,moreover the ratio of different typal parent material is diverse in depositional phases;there is no obvious phytane advantage,the average Pr/Ph is 1.03,the changes of Pr/Ph and gammacerane/C_(30) hopanoid with the deepth indicate that sedimentary environment of the source rocks are reductive,and the heterogeneity of the water is strong.
出处
《长江大学学报（自科版）（上旬）》
CAS
2012年第5期33-37,5,共5页
JOURNAL OF YANGTZE UNIVERSITY (NATURAL SCIENCE EDITION) SCI ＆ ENG
基金
国家自然科学基金项目(40973041)
关键词
东岭断陷
火石岭组
烃源岩
饱和烃
地球化学特征
Dongling Fault Depression
Huoshiling Formation
source rock
saturated hydrocarbon
geochemical characteristics
作者简介
孔鹏飞（1984-），男，2007年大学毕业，硕士生，现主要从事油气地球化学方面的研究工作。
