摘要
华北中、上元古界海相碳酸盐岩分布广泛,且沉积岩层巨厚。同时,在华北中、上元古界发现了多处油苗、沥青显示,可能为一套生油层系。通过对华北北部中、上元古界有机质热解数据的分析测定,得出了干酪根类型主要为Ⅱ型和Ⅲ型、Ⅰ型干酪根较少,这与根据当时地球上生物发育尚处于初级阶段、有机质类型主要以腐泥型为主的认识有较大差异。另外,就生油潜力而言,下马岭组的干酪根类型优于其它层位的干酪根类型。文中,还通过系统研究有机质丰度、生烃潜量及其干酪根类型来对各个层系源岩的生烃潜力进行评价,发现下马岭组、铁岭组和洪水庄组生烃潜力较好,为3个有利的生烃层位。
Marine carbonate rocks are widespread and their deposit layers are huge thick in the Middle-Upper Proterozoic of North China. At the same time,many outcrops of asphalt and oil seepages in the Middle-Upper Proterozoic strata indicate that their hydrocarbon-generating potential appraising is an important subject to further study. In this article,by managing the pyrolysis data of organic matter, we concluded that kerogen was mainly humic (Ⅱ) type and humic-sapropelic (Ⅲ) type with few Ⅰ type. This is of great differences with the fact that the evolution of living beings standed on initial stages and organic matter held sapropelic type at that time. Moreover, as for the oil-generating potential, the kerogen type of the Xiamaling Group is better than that of other groups. By systematical studying of the organic matter abundance, the hydrocarbon-generating potential and the kerogen types of samples, the authors synthetically determined the hydrocarbon-generating potential of samples in the Middle-Upper Proterozoic of North Huabei area and found three positions of better hydrocarbon-generating potential, namely, the Xiamaling Group, the Tieling Group and the Hongshuizhuang Group.
出处
《石油实验地质》
CAS
CSCD
2004年第2期206-211,共6页
Petroleum Geology & Experiment
基金
国家重点基础研究"973"项目(编号G1999043306).
关键词
有机质丰度
生烃潜力
干酪根
中、上元古界
华北北部
organic matter abundance
hydrocarbon-generating potential
kerogen
Middle-Upper Pro-terozoic
North Huabei
