摘要
济阳坳陷石炭二叠系烃源岩主要为煤和暗色泥岩。本文从有机质丰度、有机质类型及成熟度三方面对烃源岩有机地球化学特征做了详细分析。分析结果如下:有机质丰度普遍较高,煤的TOC含量在50%以上,暗色泥岩TOC含量在0 6%～1 5%之间;有机质母质类型较差,属以Ⅲ型干酪根为主的气源岩;整个济阳坳陷的C P地层处于成熟 高成熟阶段,Ro值在0 6%～1%的范围内。分析表明,区内C P煤岩总体上为较好 好的烃源岩,暗色泥岩基本上为中等 较好烃源岩。
In the Jiyang depression, the main Carboniferous-Permian hydrocarbon source rocks are coals and dark mudstones. In this paper, the organic geochemical characteristics of the hydrocarbon source rocks are described in detail in the light of the abundance, type and maturity of organic matter. Organic matter is high in abundance, the TOC of coal is above 50% and that of dark mudstones varies between 0.6% and 1.5%. The source type of organic matter is poor, belonging to Ⅲ-type kerogens. All the Carboniferous-Permian strata exist in a maturation or over-maturation stage, with Ro values varying between 0.6% and 1%. The analysis indicates that coal is a better to best hydrocarbon source rock, while dark mudstone is moderately good.
出处
《地质地球化学》
CSCD
2003年第4期68-73,共6页
Geology-Geochemistry
关键词
烃源岩
石炭二叠系
有机质丰度
成熟度
有机地球化学特征
hydrocarbon source rock
Carboniferous-Permian
the abundance of organic matter
maturation
organic geochemical characteristics
