摘要
为了查明祁连山冻土区木里天然气水合物的气源,开展冻土区三叠系烃源岩研究工作。按照深度顺序,对JN井1 300多米的岩心取芯,然后和露头样品一起进行实验测试。首先对采集到的36个样品进行常规的有机碳和岩石热解实验,分析其成熟度和生烃潜力;然后选出9个样品进行有机岩石学显微组分镜下鉴定;最后遴选出4个样品进行索氏抽提实验并进行色谱-质谱分析检测。研究结果表明,该区三叠系烃源岩基本处于高成熟阶段;有机质为Ⅱ型和Ⅲ型,有机质来源为混源输入,为陆表海-滨海三角洲相沉积;有机质丰度较高,为中等-好烃源岩。综合分析认为,冻土区三叠系烃源岩可能是该区天然气水合物的有利供气源岩。
In order to find out the gas source of gas hydrate in Muli coal field, Qilian Mountain permafrost, geochemical characteristics of Triassic source rocks are studied. According to the depth, 36Triassic samples of JN well were collected. First, for analysis of the maturity and hydrocarbon potential, the normal geochemical experiments, for example, rock pyrolysis and analysis of organic car- bon were completed. Then 9 samples were selected to carry out the microscopical maceral identification of organic petrology test. Finally, 4 samples were studied by Soxhlet extraction and GC - MS test. The results showed that research region Triassic source rocks mostly are in high maturity stage; Organic matters mainly belong to Ⅱ - Ⅲ type, which are mainly from higher plants and lower aquatic organisms mixed sources; the sedimentary environment is the epicontinental sea and shore -delta; Organic matter abundance is in relatively high, belonging to mid -good source rocks.
出处
《河北工程大学学报（自然科学版）》
CAS
2015年第4期84-89,共6页
Journal of Hebei University of Engineering:Natural Science Edition
基金
国家自然科学基金资助项目(41273066)
关键词
三叠系
烃源岩
成熟度
丰度
类型
生物标志化合物
显微组分
source rocks
maturity
abundance of organic matter
organic matter type
organic petrolo- gy
Triassic
