CAJ | 학술논문

目前羌塘盆地的绝大部分烃源岩资料均来源于地表露头的分析数据,通过对羌资2井烃源岩和南羌塘坳陷扎仁地区地表烃源岩特征对比分析,从烃源岩岩性、有机质丰度、类型和成熟度等方面揭示了羌塘盆地的地表与地下烃源岩之间的差异.结果显示,羌资2井有机碳含量高于地表条件下的有机碳含量,有机质类型以Ⅱ_1型干酪根为主,极少量为Ⅱ_2型,而有机质演化程度也明显偏低.因此,认为羌塘盆地地下烃源岩具有非常好的生油能力,这对羌塘盆地烃源岩的评价有重要的现实意义.
목전강당분지적절대부분경원암자료균래원우지표로두적분석수거,통과대강자2정경원암화남강당요함찰인지구지표경원암특정대비분석,종경원암암성、유궤질봉도、류형화성숙도등방면게시료강당분지적지표여지하경원암지간적차이.결과현시,강자2정유궤탄함량고우지표조건하적유궤탄함량,유궤질류형이Ⅱ_1형간락근위주,겁소량위Ⅱ_2형,이유궤질연화정도야명현편저.인차,인위강당분지지하경원암구유비상호적생유능력,저대강당분지경원암적평개유중요적현실의의.
Most information about the source rocks in Qiangtang basin are originally taken from analytical data of the outcrops. This paper presents correlation and analysis of the characteristics of the source rocks in Qiangzi-2 well and on the surface in Zharen area in southern Qiangtang depression. And some differences of source rocks between them are revealed in lithology, organic matter's abundance, type and maturity, etc. The result shows that the content of organic carbon of Qiangzi-2 well is higher than that on the surface condition, and the type of organic matter is dominated by Type Ⅱ_1 kerogen, very little with Type Ⅱ_2 kerogen, and also the evolution degree of organic matter is obviously low. It is concluded that the source rocks in Qiangtang basin is of very good potential of hydrocarbon generation. This is significant to the proper evaluation of the source rocks in Qiangtang basin.