二连盆地赛汉塔拉凹陷烃源岩的分布及形成  

Source rock distribution and formation in Saihantala depression, Erlian Basin

作　　者：丁修建[1,2] 柳广弟[2] 黄志龙[2] 孙明亮[2] 陈哲龙 柳庄小雪 

机构地区：[1]中国石油大学地球科学与技术学院,山东青岛266580 [2]中国石油大学地球科学学院,北京102249

出　　处：《中南大学学报（自然科学版）》2015年第5期1739-1746,共8页Journal of Central South University:Science and Technology

基　　金：国家重点基础研究发展计划(973计划)项目(2014CB239005);国家科技重大专项(2011ZX05001-001)~~

摘　　要：为了明确烃源岩形成的主控因素,基于烃源岩碳酸盐同位素、生物标志化合物、微量元素等地球化学数据探讨烃源岩的形成,并基于烃源岩实测总有机碳质量分数w(TOC)数据分析烃源岩的分布特征。研究结果表明:二连盆地赛汉塔拉凹陷烃源岩分布特征与传统认识明显不同;水体较浅的缓坡带烃源岩厚度最大、有机质丰度最高;赛汉塔拉凹陷为小型断陷湖盆,具有水体浅、物源近、沉积速率大等不同于大型湖盆的沉积环境。有机质陆源输入、水动力条件和氧化还原程度是烃源岩形成的主控因素;水体浅、物源近是小型断陷湖盆烃源岩分布、形成不同于大型湖盆的原因。To clarify the main controlling factors involved in formation of source rock, a number of geochemical data were researched on their relationship with source rock formation, including carbonate isotope, biomarker parameters and trace elements, and based on research upon measured total organic carbon content（w（TOC）） in Saihantala depression in Erlian basin, the distribution of source rock was analyzed. The results show that the source rock on gentle slope with shallow water depth is the thickest and has the highest w（TOC）. Saihantala depression belongs to small faulted basin with characters of shallow water depth, near provenance and high sedimentary rates which is different from large basins in sedimentary environment. The main controlling factors contributing to formation of source rock consist of terrestrial inputs of organic matter, hydrodynamic conditions and oxidation-reduction degree. The main reasons for the distribution and formation of source rock in small faulted basin are its shallow water and near provenance.

关 键 词：烃源岩分布 烃源岩形成 小型断陷湖盆 赛汉塔拉凹陷 二连盆地 

分 类 号：TE121.1[石油与天然气工程—油气勘探]