摘要
内蒙古锡林浩特—阿鲁科尔沁地区上二叠统林西组烃源岩以暗色泥岩、板岩为主.借助油气有机地球化学分析测试手段,从有机碳含量、热解参数、干酪根类型、干酪根C同位素等资料,综合分析了该地区上二叠统林西组的有机质丰度、类型和成熟度,并对其进行了综合评价.研究认为,本地区上二叠统林西组烃源岩TOC含量主要分布于0.6％～0.8％之间;分层统计显示,烃源岩TOC大于0.4％的地层厚度为1827m,TOC大于1.0％的优质烃源岩地层统计厚度为469.7m.有机质类型主要为Ⅲ型,有机质热演化程度高,样品R.大部分高于2.0％,达到高成熟—过成熟演化阶段.评价研究区内具有代表性的必鲁特（BL）、翟家沟官地（GD）剖面,认为本区是有利烃源岩发育区域,具备生产高熟天然气、凝析气和非常规能源页岩气的能力.
The Upper Permian Linxi Formation in Xilin Hot-Ar Horqin Banner area has a great potential of hydrocarbon.The source rocks in the study area are mainly dark mudstone and argillites.By means of organic geochemical analysis and from the geochemical parameters（i.e.,organic matter abundance,kerogen type,and thermal maturity）,the authors made a comprehensive evaluation of the hydrocarbon generation potential of the source rocks.The TOC content of upper Permian hydrocarbon source rocks of Linxi Formation is mainly distributed in the range of 0.6%~0.8%,belonging to the secondary hydrocarbon source rock type.The thickness of the hydrocarbon source rock is 1827m,and the statistical thickness of the high-quality hydrocarbon source rocks is 469.7m.Main organic matter is of type Ⅲ.It has a high degree of thermal evolution of organic matter,and most Rodata are higher than 2.0%,indicating that hydrocarbon source rocks mostly achieved high mature-over mature stage of evolution.The results show that the study area has advantageous source rock,which is capable of producing high-mature natural gas,condensate gas and unconventional energy-shale gas.
出处
《地质通报》
CAS
CSCD
北大核心
2013年第8期1329-1335,共7页
Geological Bulletin of China
基金
中国地质调查局项目(编号:1212010782001)
关键词
内蒙古北东部
林西组
烃源岩
有机地球化学
页岩气
northeastern Inner Mongolia Linxi Formation source rock organic geochemistry shale gas
